//
// This help file was created on July 7, 1997
// Principal author - Andy Rost
// Export	- modified by Anders Nov. 11, 1998
//
// Version 1.0      - Dec. 15, 1998           
// Version 1.01     - Jan. 14, 1999
// Version 1.02     - Jan. 22, 1999
// Version 1.03     - June  3, 1999
// Version 1.04     - July 28, 1999
// Version 1.05     - Aug. 19, 1999
// Version 1.06     - Nov. 24, 1999
// Version 1.07     - Mar. 09, 2000
// Version 1.10     - May  02, 2001
// Version 1.11     - May  02, 2001
// Version 1.12     - May  02, 2001
// Version 1.13     - Feb. 21, 2002
// Version 1.14     - Mar. 20, 2002
// Version 1.15     - June 03, 2002
// Version 1.16     - June 14, 2004
// Version 1.17     - July 12, 2004
// Version 1.18     - Aug. 24, 2004
// Version 1.19     - Dec. 02, 2004
// Version 1.20     - Nov. 07, 2005
// Version 1.21     - Aug. 17, 2006
// Version 1.22     - Feb. 23, 2007
// Version 1.23     - Oct. 23, 2007
// Version 1.24     - May  06, 2009

/ONE EXPORT Overview
EXPORT Overview

This application exports various GIS layers for use 
with other applications. Layers can be previewed
before the export process, so that the user knows
exactly what is being converted. 

/ONE File - Export Basins
File - Export Basins

Purpose 

To export IHABBS basin layers in a format compatible
with other geospatial data processing systems.

Usage

Select the feature you wish to export from the Input
Source list of options by selecting the appropriate
button.

Selecting Opened Basin Layer will result in exporting
the basins in the currently open basin GIS layer. 
Selecting Select Basin Layer will allow you to select
from any of the basin GIS layers that you've 
constructed using IHABBS.

If you elect to export basins using the Select Basin
Layer option the list box entitled Hydrologic Basin
GIS Layers will become active. Select the basin GIS
layer to export from this list box.

You have the option of exporting the entire GIS layer
or a portion of it. If only a portion of the layer is
to be exported you have only several options to define 
which portion. That option consists of selecting the
layer from which you want to select the bounding 
polygon, and the selection of the actual polygon itself.
These options include exporting by county warning area,
by county boundary, and state boundary, to name a few.
 The selection of the individual region is made in the
Filter Selection list box. 

When exporting by a filter polygon, Export computes a
minimum bounding rectangle about the selected region.
A buffer is added around the minimum bounding
rectangle, the size of which is specified in the 
Export Options dialog. Any GIS layer feature within
the enlarged minimum bounding rectangle is exported
by Export.

In addition to the filtering by geographical proximity,
Export can also filter items by their given attribute
values. For basin vector layers, this attribute can
be either the name, COM5 id, CWA id, or forecast group,
whose given values were specified during delineation/
editing of basins.
A secondary dialog will appear after clicking on the 
"By Attribute" filter. The user will be able to enter in
a textstring to filter. Pressing "Preview" in the lower
lefthand corner will preview what objects where found in
that corresponding layer, and the found objects will fill
the listbox on the right. If the exported layer is not a
river layer, the user may view these objects by selecting
them in the previewed listbox.
Of note is that the filtering process matches all objects
in a layer that start with the value given. Thus, entering 
"MN" while filtering counties will return all the counties
in Minnesota. (Names in the county layer begin with the 
stat prefix and then the county name.)

There are several export formats supported by Export.
Select the export format by selecting the 
appropriate Output Format button. The WHFS file
names will be appended with .rfcwa where:
   rf  = the RFC abbreviation and
   cwa = the CWA abbreviation (if selected)
         or the first three letters of the 
         polygon name.

Along with the format the user can also define the
precision of the output in the form of the number
of decimal places beyond whole degrees to output
for each coordinate. The default, 4 decimal places,
captures geodetic coordinates to the nearest second.
You can select anywhere from 2 to 6 decimal places by
moving the Decimal Places slider.

Some export formats require coordinates with a 
specified number of decimal places. The user will be 
prevented from selecting number of decimal places 
incompatible with the format selected.

And finally, you must provide the name of the output
file. If multiple output files are created, as is the
case for the Arc/Info format, simply provide the file
name without an extension. The various extensions
will be appended by Export.

Relationships

To export the opened basin layer a basin GIS layer
must be opened first.
 
Hints

In the special case of Arc/Info we also provide you
with an AML that inserts IHABBS attributes into an
INFO database and creates an Arc/Info GIS coverage.
 
Output Format Table:
  Format    Colinear filter  file extension
  --------  ---------------  -----------------------
  ARC/INFO  No               aml att gen
  GRASS     No               grz gtt cat
  Version5  Yes              vn5
  WHFS      Yes              xx    = RFCcode
                          or xxyyy = RFCcode+CWAcode
  WINQPF    No               out qpf

See Also


File - Export Raster Layer               
File - Export Vector Layer               
View - Features


/ONE File - Export Raster Layer
File - Export Raster Layer

Purpose 

To export IHABBS raster GIS layers in a format
compatible with other geospatial data processing
systems.

Usage

Select the feature you wish to export from the Input
Source list of options by selecting the appropriate
button.

You must also provide the name of the output file. 
Simply provide the file name without any extension.
The various extensions will be appended by Export.
For ARC/INFO .aml, .bil, and .hdr are created.
.aml is an AML that inserts IHABBS attributes into an
INFO database and creates an Arc/Info GIS coverage.
For GRASS .cell .cellhd .cats are created in the
output directory. 

It is the responsibility of the user to move these
files to their appropriate directories, and to change
their extensions if necessary.

See Also

File - New
File - Export Basins               
File - Export Vector Layer               
View - Features
Configuration File

/ONE File - Export Vector Layer
File - Export

Purpose 

To export IHABBS vector GIS layers in a format
compatible with other geospatial data processing
systems.

Usage

Select the feature you wish to export from the Input
Source list of options by selecting the appropriate
button.

Selecting Rivers (>= River Length) will result in 
exporting rivers whose length are equal to and longer
than the MAJORLENGTH.
Selecting Streams (< River Length) will result in 
exporting streams whose length are shorter than the
MAJORLENGTH.
Selecting Rivers and Streams will result in exporting
all rivers and streams.

If Major Length is 0 then only the Rivers and Streams
option is available. Major Length can be set in
the Configuration file, as well as menu option:
Options - Parameters.

You have the option of exporting the entire GIS layer
or a portion of it. If only a portion of the layer is
to be exported you have only several options to define
which portion. That option consists of selecting the
layer from which you want to select the bounding
polygon, and the selection of the actual polygon itself.
These options include exporting by county warning area,
by county boundary, and state boundary, to name a few.
The selection of the individual region is made in the
Filter Selection list box.

When exporting by a filter polygon, Export computes a
minimum bounding rectangle about the selected region.
A buffer is added around the minimum bounding
rectangle, the size of which is specified in the
Export Options dialog. Any GIS layer feature within
the enlarged minimum bounding rectangle is exported
by Export.

In addition to the filtering by geographical proximity,
Export can also filter items by their given attribute
values. For background vector layers, this attribute is
limited to the "Name" field.
A secondary dialog will appear after clicking on the 
"By Attribute" filter. The user will be able to enter in
a textstring to filter. Pressing "Preview" in the lower
lefthand corner will preview what objects where found in
that corresponding layer, and the found objects will fill
the listbox on the right. If the exported layer is not a
river layer, the user may view these objects by selecting
them in the previewed listbox.
Of note is that the filtering process matches all objects
in a layer that start with the value given. Thus, entering 
"MN" while filtering counties will return all the counties
in Minnesota. (Names in the county layer begin with the 
stat prefix and then the county name.)


There are several export formats supported by Export.
Select the export format by selecting the 
appropriate Output Format button. The WHFS file
names will be appended with .rfcwa where:
   rf  = the RFC abbreviation and
   cwa = the CWA abbreviation (if selected)
         or the first three letters of the
         polygon name.

Along with the format the user can also define the
precision of the output in the form of the number
of decimal places beyond whole degrees to output
for each coordinate. The default, 4 decimal places,
captures geodetic coordinates to the nearest second.
You can select anywhere from 2 to 6 decimal places by
moving the Decimal Places slider.
Some export formats require coordinates with a 
specified number of decimal places. The user will be 
prevented from selecting number of decimal places 
incompatible with the format selected.

You must also provide the name of the output file. 
Simply provide the file name without any extension. 
The various extensions will be appended by Export.
For ARC/INFO .aml, .att, and .gen are created.
.aml is an AML that inserts IHABBS attributes into an
INFO database and creates an Arc/Info GIS coverage.
For GRASS .grz, .gtt, and .cat are created.
For NWSRFS Version 5 .vn5 is created.
For WHFS output filename is extended by .xxyyy where
xx is the 2-letter RFC code and yyy is the 3-letter
filter code.

It is the responsibility of the user to move these
files to their appropriate directories, and to change
their extensions if necessary.

Hints

You can view what Export thinks are major rivers by
commenting out the MAJORRIVERS record in the nohrsc
configuration file. When this is done, Export will
selectively filter major rivers from the all rivers
layer based on the value of the MAJORLENGTH nohrsc
configuration file record. This will slow down the
display of major rivers significantly!

See Also

File - New
File - Open - Open Basin GIS Layer
File - Export Basins               
File - Export Raster Layer               
Options - Parameters
View - Features
Configuration File

/ONE Options
Options

Purpose

To change the program parameters that affect
the display or the program functionality.

Usage

Select an item from the Options cascading menu to 
select the type of parameters you wish to set.
the map features displayed in the Export viewing 

/ONE Options - Display Options...
Options - Display Options...

Purpose 

To control how alphanumeric and raster image data is 
formatted.

Usage

To control the units of measurement for the display
of attributes and the input of parameters depress 
either the English or Metric button.

To control the format of coordinates for the display
of coordinates or the input of coordinates depress
either the decimal or the DD:MM:SS.s button. The
decimal format expects coordinates to be entered as
a standard decimal value. The DD:MM:SS.s expects 
coordinates to be entered as integer degrees, colon,
integer seconds, colon, and integer or floating point
second. Fifteen degrees, 16 minutes, and 17 seconds
should be entered as 15.27138889 in decimal format
and as 15:16:17.0 or 15:16:17 in DD:MM:SS.s format.

To display greater raster image detail as you
tighten your display view you should select the Yes
button next to RESCALE ON ZOOM?. This will force
Export to calculate the minimum and maximum visible
raster value to display prior to displaying the 
raster image. The calculated minimum and maximum 
values are used to generate a new color table 
maximizing the contrast within the display region.
This, however, requires reading the raster data file
twice before display which slows down the map 
display.

Hints

Raster GIS layer color table scaling is a feature you
may wish to use with discretion if image rendering 
times are unacceptable. You may want to wait until 
you've zoomed in before selecting this feature.

See Also

View - Features

/ONE Options - Export Options
Options - Export Options

Purpose

To allow advanced user control of certain soft-coded
parameters that affect program functions.

Usage

During Export by filter, selected objects within a 
specified window are exported.  The window is 
specified by the extents of the filter boundaries, 
with an added margin called 'Filter Buffer Width' in
all four directions.

'All Rivers' is presently an RF1 file. Rivers with
'sum_drain_length' greater than a threshold value 
called 'Major River Length' are called 'Major Rivers',
and the rest are called 'Streams'. This distinction
affects the display of 'Major Rivers', as well as the
Export of 'Major Rivers', and 'Streams'. The filtering
routines have turned out to be very slow.

Change the displayed parameters to desired value,
then click OK to affect the change. The default values
for these parameters can be set in the configuration
file. FILTERBUFFER specifies the width of the 
exporting buffer, and MAJORLENGTH sets the threshold
for major river display and export.  

See Also

File - Export Vector Layer               
Options - Delineate Options
View - Features
Configuration File

/ONE Query
Query

Purpose 

To query basin attributes and raster GIS layer
values.

Usage

Select an item from the Query cascading menu to 
select the type of query you wish to perform.
the map features displayed in the Export viewing 

Options control the displayed units of measure, the
format of displayed map coordinates, and whether or 
not dynamic scaling of raster data should be invoked.

See Also

File - New
File - Open - Open Basin GIS Layer
File - Open - Open Flow Direction GIS Layer

/ONE Query - Query Opened Basin Layer
Query - Query Opened Basin Layer

Purpose 

To query Export for the attributes of the basin at
the current cursor position.

Usage

Position your cursor and depress a mouse button. The
attributes of the basin at the current cursor 
position will be reported. Basin attributes are 
reported only if you have a basin layer open for 
delineation or editing.

Relationships

To query basin attributes a basin GIS layer must 
first be opened. The units of the queried attributes
can be changed in Query - Options. The format of
queried coordinates can be changed in Options - 
Display Options.

Hints

The basin query dialog only reports when it has
input focus and the cursor is shown by a set of 
crosshairs. If you change focus to another window
and want to continue displaying query results, click
on the query button in the basin query dialog first.
That should allow raster querying to continue.

See Also

File - New
File - Open - Open Basin GIS Layer
Options - Display Options
Query - Query Raster Layers

/ONE Query - Query Raster Layers
Query - Query Raster Layers

Purpose 

To query Export for the values of raster data at the
current cursor position.

Usage

Position your cursor and depress a mouse button. The
raster data values of IHABBS raster data files at the
current cursor position will be reported.  Basin ID 
values are reported only if you have a basin GIS 
layer open for delineation or editing. Flow direction
values are reported only if you have a flow direction
GIS layer open for delineation or editing.

The reported basin ID is the value of the unique code
that IHABBS assigns to each delineated basin.

Relationships

To query basin identifiers a basin GIS layer must 
first be opened. To query flow directions a flow 
direction GIS layer must first be opened. The units 
of the queried attributes can be changed in 
Options - Display Options. 

Hints

The raster query dialog only reports when it has
input focus and the cursor is shown by a set of 
crosshairs. If you change focus to another window
and want to continue displaying query results, click
on the query button in the raster query dialog first.
That should allow raster querying to continue.

See Also

Options - Display Options
Query - Query Opened Basin Layer

/ONE View
View

Purpose 

To control what and how data is displayed in the 
display region.

Usage

Select an item from the View cascading menu to select
the map features displayed in the Export viewing 
window. The View menu items allow you to select both
raster and vector map features. Only one raster
feature may be selected at any one time. As many
vector features as you like may be displayed over
a raster image or by themselves.

Additionally, you can manipulate how map features are
displayed. Color options allow you to alter the color
of vector map features. Other options control the 
displayed units of measure, the format of displayed 
map coordinates, and whether or not dynamic scaling
of raster data should be invoked.

Relationships

The items on the View menu allow you to control what 
and how data is displayed in the Export viewing
window. How much data is visible in the Export 
viewing window is controlled in the Zoom menu.

Hints

Some of the GIS layers take longer to display than
others. You may find it useful to wait until you've
tightened your view before displaying time consuming
GIS layers.  Also, raster GIS layer color table
scaling is a feature you may wish to use with
discretion if image rendering times are unacceptable.

See Also

Zoom
Configuration File

/ONE View - Features
View - Features

Purpose 

To control what data is displayed in the display 
region.

Usage

Select a raster image and as many vector drawings
as you like for display. Raster images may be
displayed with or without vector drawings. Vector
drawings may be displayed with or without raster
images. Only one raster image may be displayed at
once. As many vector drawing as you like may be 
displayed at once.

Vector drawings will always be displayed over raster
images. Raster images will never obscure vector
drawings.  Vector drawings are displayed in the 
order that they were selected.

Relationships

Certain raster images represent a continuous surface
of values. DEMs, for instance, depict elevations from
less than 0 meters to several thousand meters. Your
computer is capable of displaying only a relatively
small number of monotonic colors - somewhere between
200 and 250 monotonic colors. Not enough colors to
see much detail.

We've put a feature into Export which allows it to
compute a new monotonic color table each time the
limits of the display region changes. As you zoom in
more and more detail in the raster image is revealed
when this option is invoked. See Options - Display
Options for details.

If the MAJORRIVERS record in the nohrsc configuration
file is commented out or missing, Export will
selectively filter major rivers from the all rivers
layer based on the value of the MAJORLENGTH record.
This will slow down the display of major rivers
significantly! But this will enable you to see what
Export thinks are major rivers before running the
export rivers features. This MAJORLENGTH value can
be specified in the configuration file, but otherwise
defaults at 150 km. 

Hints

Some of the GIS layers take longer to display than
others. You may find it useful to wait until you've
tightened your view before displaying time consuming
GIS layers.  Also, raster GIS layer color table
scaling is a feature you may wish to use with
discretion if image rendering times are unacceptable.

Since vector drawings are displayed in the order 
that they were selected, display the most important
vector drawing last. Otherwise it will be obscured by
other vector drawings.

If the MAJORRIVERS record in the nohrsc configuration
file is commented out or missing, Export will
selectively filter major rivers from the all rivers
layer based on the value of the MAJORLENGTH record.
This will slow down the display of major rivers
significantly! But this will enable you to see what
Export thinks are major rivers before running the
export rivers features.

See Also

Zoom
Options - Display Options

/ONE View - Colors - Set Vector Colors/ Point Colors
Set Vector Colors
Set Point Colors

Purpose 

To adjust the color that vector GIS layers are
rendered in.

Usage 

The color that each vector GIS layer is displayed in
is coded in the vector GIS layer header file. While
this value can (but probably should not) be edited by
the user, the vector colors are more readily adjusted
by using this Export feature.

Simply select the GIS layer for which you wish 
modify the color. Move the slider bars left and right
to adjust the mixture of red, green, and blue. As
you adjust the colors with the sliders, the color of
the vector GIS layer will change automatically. In
the event that the selected GIS vector layer is not 
currently displayed, the adjusted color is also
displayed in a swatch immediately above the color
sliders. 

This is not a permanent change. The next time you
enter Export the original vector colors will be
invoked. Hopefully we've selected reasonable colors
for the various vector GIS layers. If not, contact us
for guidance on making permanent changes to the color
values assigned in the header files.

Hints

Make sure the vector colors contrast well with
the outlet point and background colors. It's possible
to make a vector "invisible" by assigning it the
same color mix as the background color. Likewise,
select the vector colors to contrast well with the
raster layers you plan to display. The color tables
assigned to raster files can not be modified by the
user.


/ONE Zoom
Zoom

Purpose

To control the limits of the display region.

Usage 

Select an item from the Zoom cascading menu to define
the geographic limits of the portion of the RFC 
displayed in the Export viewing window. The Zoom menu
items allow you to zoom in to and out from the RFC in
addition to allowing you to redefine the center of 
your view of the RFC.

Relationships

The items on the Zoom menu allow you to control how
much data is visible in the Export viewing window.
What data is actually displayed is selected in the
View - Features dialog.

Hints

See that dotted line at the top of Zoom's pull down
menu? If you click on it the Zoom menu is torn away
from the Export menu bar. This is a handy feature if
you plan to zoom and pan several times during an 
Export session.

See Also

View - Features

/ONE Zoom - Zoom In On Box
Zoom - Zoom In On Box

Purpose 

To select a smaller display region by defining a
"rubber band" box around a smaller area. 

Usage

This feature allows the user to "tighten" the view
of the RFC by defining a "rubber band" box around a
smaller area of interest. The cursor will change
shape from a pointer to a cross hair. Position the
cross hair on the first corner of the smaller region
and depress the left mouse button.  Then position the
cross hair on the second corner and depress the left
mouse button again. Between the first and second 
mouse button depressions a "rubber band" box will be 
displayed indicating the limits of your new view. 
Upon selection of the second box corner the "rubber 
band" box will be erased, the cursor will revert back
to a pointer, and your new view will be rendered. 
There is no need to keep the left mouse button 
depressed between the first and second zoom box 
corner selections. The order in which box corners are
selected is not important.

You will note that Export will make every attempt to
fill the display canvas up to its edges. Because of
this feature, the zoomed image will almost always be
larger along one of its axis than the area described
by the zoom box. The displayed area will however
include all of the data requested by the user.

Relationships

If you change your mind while in the process of 
defining your zoom box you can simply make a new
selection from the ihabbs menu. The "rubber band"
box will disappear, the cursor will revert back to a
pointer, and your current view will remain the same.

Hints

Some of the GIS layers take longer to display than
others. You may find it useful to wait until you've
tightened your view before displaying time consuming
GIS layers.  Also, raster GIS layer color table
scaling is a feature you may wish to use with
discretion if image rendering times are unacceptable.

Errors

There is a known bug in the display system when you
zoom in too tightly. The vector layers have a
tendency get confused when you zoom in on an area
smaller than a pixel.

See Also

Options - Display Options
View - Features
Zoom - Zoom In On Basin From List
Zoom - Zoom In On Center

/ONE Zoom - Zoom In On Basin From List
Zoom - Zoom In On Basin From List

Purpose 

To select a smaller display region by selecting a
basin to zoom in on from the basin name list box. 

Usage

This feature allows the user to "tighten" the view
of the RFC by selecting a basin from a list of basins
in the currently open basin layer.  The view will be 
adjusted to the limits of the selected basin plus a 
modest buffer. The size of the buffer is defined in 
the nohrsc configuration file. 

Relationships

The basin list box is used by several Export features
requiring basin selection by name. Upon selection of
Zoom In On Basin From List, or any other feature
requiring the selection of a basin by name, a list
box dialog will be displayed if not already
displayed. The list box dialog will remain displayed
and will be managed throughout the entire Export
session unless dismissed by the user. All Export
features requiring selection of a basin by name will
share this list box dialog.

Hints

Some of the GIS layers take longer to display than
others. You may find it useful to wait until you've
tightened your view before displaying time consuming
GIS layers.  Also, raster GIS layer color table
scaling is a feature you may wish to use with
discretion if image rendering times are unacceptable.

See Also

Options - Display Options
View - Features
Zoom - Zoom In On Box
Zoom - Zoom In On Center

/ONE Zoom - Reset to RFC Limits 
Zoom - Reset to RFC Limits

Purpose 

To select a larger display region by resizing the 
display region to the RFC limits. 

Usage

This feature allows the user to "expand" the view
of the RFC by resizing delineation area to the limits
of the RFC center plus a modest buffer. The name of 
the RFC is defined in the nohrsc configuration file. 

Hints

Some of the GIS layers take longer to display than
others. You may find it useful to unselect time
consuming GIS layers before expanding your view.
Also, raster GIS layer color table scaling is a 
feature you may wish to use with discretion if image
rendering times are unacceptable. 

See Also

Options - Display Options
View - Features
Zoom - Zoom Out From Center
Configuration File

/ONE Zoom - Pan To Center On Cursor
Zoom - Pan To Center On Cursor

Purpose 

To select a new display region by shifting the  
display region center point. 

Usage

This feature allows the user to redefine the center
of the RFC view. The cursor will change shape from a 
pointer to a cross hair. Position the cross hair on 
the center of your new view and depress the left 
mouse button.  Upon selection of the new view center 
the cursor will revert back to a pointer and your new
view will be rendered.

Relationships

The current image center defines the center for rapid
zooming in and zooming out from the view center.

If you change your mind while in the process of 
defining your new view center you can simply make a
new selection from the ihabbs menu. The cursor will
revert back to a pointer and your current view will
remain the same.

See Also

Zoom - Zoom In On Center
Zoom - Zoom Out From Center

/ONE Zoom - Zoom In On Center
Zoom - Zoom In On Center

Purpose 

To select a smaller display region by zooming in on
the display region center point. 

Usage

This feature allows the user to "tighten" the view
of the RFC by decreasing the limits of the view about
the center of the current view. The degree of zooming
is controlled by the current zoom setting.

Relationships

The degree to which zooming in on displayed features 
occurs with each selection of this menu item is 
controlled by Zoom - Zoom Setting. 

Hints

Some of the GIS layers take longer to display than
others. You may find it useful to wait until you've
tightened your view before displaying time consuming
GIS layers. Also, raster GIS layer color table
scaling is a feature you may wish to use with
discretion if image rendering times are unacceptable.

Errors

There is a known bug in the display system when you
zoom in too tightly. The vector layers have a
tendency get confused when you zoom in on an area
smaller than a pixel.

See Also

Options - Display Options
View - Features
Zoom - Zoom In On Box
Zoom - Zoom In On Basin From List
Zoom - Pan To Center On Cursor
Zoom - Zoom Out From Center
Zoom - Zoom Setting

/ONE Zoom - Zoom Out From Center
Zoom - Zoom Out From Center

Purpose 

To select a larger display region by zooming out from
the display region center point. 

Usage

This feature allows the user to "expand" the view
of the RFC by increasing the limits of the view about
the center of the current view. The degree of zooming
is controlled by the current zoom setting.

Relationships

The degree to which zooming out from displayed 
features occurs with each selection of this menu item
is controlled by Zoom - Zoom Setting. 

Hints

Some of the GIS layers take longer to display than
others. You may find it useful to unselect time
consuming GIS layers before expanding your view.
Also, raster GIS layer color table scaling is a 
feature you may wish to use with discretion if image
rendering times are unacceptable. 

See Also

Options - Display Options
View - Features
Zoom - Reset to RFC Limits
Zoom - Pan To Center On Cursor
Zoom - Zoom In On Center
Zoom - Zoom Setting

/ONE Zoom - Zoom Setting
Zoom - Zoom Setting

Purpose 

To control the degree to which the display region is
zoomed in on or out from.

Usage

This feature controls the degree of zooming in and
zooming out from center. The user slides the slider
left or right to the desired zoom level. The reported
number is not the degree of magnification or 
reduction. Rather, it is the the degree to which
each axis of the image will be scaled up or down.

The initial or default zoom setting is defined in the
nohrsc configuration file.

Relationships

Altering the zoom setting controls the degree to 
which the displayed features are zoomed in on or
zoomed out from with each selection of Zoom - Zoom In
On Center and Zoom - Zoom Out From Center.

See Also

Zoom - Zoom In On Center
Zoom - Zoom Out From Center
Configuration File

/ONE Help - Help
Help - Help 

Purpose

On-line Export user documentation.

Usage

Select a help item from the list box at the bottom of
the Help dialog. The help items are grouped by the
alphabetized Export menu bar items. Additionally,
we've included help information on 
frequently asked questions, a glossary,
the nohrsc configuration file, and the batch 
delineate input file format . When a help item is 
selected, the help information on the selected topic 
is displayed in the text box at the top of the help 
dialog.
 
Hints

The contents of the file displayed by the Export help
system may be edited by the user. The file is named
ihabbs.hlp. New help sections may be added by
enclosing the new section headings in arrow braces.
The text following the arrow brace enclosed headings
is displayed as help text. You can augment this help
file by adding text to existing help sections and by
creating new help sections.

Help file lines preceded by double forward slashes
are ignored by the Export help system. The double
slashes indicate help file comment lines.

See Also

Help - About Export 

/ONE Help - Help Espanol
Help - Help Espanol

Purpose

(Optional) On-line Export user documentation
in Spanish

Usage

This works exactly the same as the English help file.
Export will look for an "Export.hlp.e" file or a
spanish help file specified in the configuration file.
If none are found, this menu item will be grayed out.

Hints

See Also

Help - Help
Help - About Export


/ONE Help - About Export
Help - About Export

Purpose 

Reports the Export version number and details on how
to contact the Export developers for information
about Export not covered in the Export help system.
The date and time of the last compilation are displayed 
on the Export status line.

See Also

Help - Help

 
/ONE Glossary
Glossary

CWA    : County Warning Area
D8     : A means of representing flow directions in
         a raster format. For a given elevation pixel
         the eight neighbors are examined. The pixel
         with the lowest elevation relative to the
         center pixel defines the flow direction.
         There are eight possible flow directions:
         north, northeast, east, southeast, south,
         southwest, west, and northwest.
dangling stream :
         A stream whose tail water does not tie into
         another stream.
DEM    : Digital Elevation Model. A raster data file
         containing terrain elevations. Our DEM was
         constructed from 3-arc second USGS DEM's and
         Canadian DTED files.
DLG    : The USGS Digital Line Graph format for
         vector data sets.
EPA    : The Environment Protection Agency
flow accumulation :
         The sum total area of all terrain flowing
         to a given pixel not including the area of
         that pixel.
flow direction :
         The D8 direction that water from a given
         pixel flows. See D8. 
focus  : The Motif window that is currently receiving
         keyboard or mouse input.
GIS    : Geographic Information System. Software for 
         managing geographically distributed data.
IHABBS : Integrated Hydrologic Automated Basin 
         Boundaries System
HSA    : Hydrologic Service Area
NOHRSC : The National Operational Hydrologic Remote 
         Sensing Center
non-contributing-area :
NCA    : Part of the landscape into which water flow
         but out of which water does not flow.
NWS    : The National Weather Service 
parent basin :
         The basin in which a rain-on-reservoir
         resides.
pixel  : Picture element. An individual raster matrix
         value. A pixel defines a value at a specific
         raster location.
rain-on-reservoir basin :
ROR    : A basin whose spatial limits are defined
         by the maximum pool elevation of a dammed
         reservoir. An ROR basin is an island polygon
         within a parent basin polygon.
raster : A matrix of digital values which, when 
         displayed, forms a continuous tone image.
RF1    : Reach File version 1. USGS DGL rivers and 
         streams data set modified by the EPA to 
         accurately characterize the nation's
         hydrography. Our RF1 was modified to
         correctly represent hydrographic topology
         and to register with the DEM.
RFC    : River Forecast Center
topology :
         The order in which objects are linked 
         together.
USGS   : The United States Geological Survey
vector : An array of values which, when displayed,
         forms a map image of points, lines, and
         areas.

/ONE Export Version History
Export Version History


Version 1.0
-----------
Date    : Dec. 1998
Features: 

       * First non-beta release.
       * Includes viewable basin outlet points.
       * Background color can be modified.
       * Point layer colors can be modified.
       * User may export by any polygon rather than 
           just by CWA.

Version 1.01
------------
Date    : Jan. 1999
Features:

       * Fixes some minor bugs.
       * Along with nohrsc, can execute outside of
         the <BIN> directory if this directory is
         included in the "path" and IHABBS is an
         exported pathname. 
       * Export can also use a local configuration
         file or one located in the <BIN> directory.
       * Of note is that the user must have write
         access to the directory holding the config
         file.

Version 1.02
------------
Date    : Jan. 1999
Features:

       * Fixes a memory leak in exporting vectors.
       * Allows user to export "by attribute". In this
         fashion, vector layers can be exported by their
         name, and basins can be exported by name, COM5 id,
         CWA id, or Forecast group.
       * Improved some error messaging.
       * Now checks to see if exported files will overwrite 
         other files.
       * Fixed a bug when drawing less than 10 outlet points.

Version 1.03
------------
Date    : June 1999
Features:

       * Miscellaneous GUI tweaks involving fonts.
       * Support for expanded basin attributes : 
             Elevation zone boundaries
             Mean/Minimum/Maximum slope, elevation, & aspect
         Basin layers will need to be opened in IHABBS in 
         order to take advantage of this.
         (Otherwise warning messages will appear when the 
         user queries or exports a basin.)
       * Query basin now has an option for "Less" or "More",
         where the user may view either the traditional basin 
         attributes or the expanded version which includes
         the fields described above.
       * Exporting into WHFS will use description field if
         available, otherwise will use COMS5 Handbook Id.

Version 1.04
------------
Date    : July 1999
Features:

       * Calculating major rivers is much faster 
       * Failed export cleans up after itself
       * Filtered export optimized (slightly faster)
       * Default export vector precision set to 
         6 decimal places from 4.

Version 1.05
------------
Date    : Aug. 1999
Features:

        * Export to WinQPF filters basins to 1000 vertices.
          (Used to be 3000).
        * Selecting from list dialog bug fixed

Version 1.06
------------
Date    : Nov. 1999
Features:

        * Expanded basin attributes supported for exported
          Arc/INFO format. Basin AML corrected for use with
          expanded attributes. Note that apostrophes in text
          fields will be replaced with spaces in the exported
          file to maintain Arc/INFO compatibility.
                    
Version 1.07
------------
Date    : Mar. 2000
Features:

        * Exported basin attributes in ARC/INFO format now
          include forecast groups.
        * Corrected formatting issues concerning the expanded
          basin attributes

Version 1.10
------------
Date    : Apr. 2000
Features:

        * Ability to export basins and other vectors in ESRI
          shapefile format

Version 1.11
------------
Date    : Aug. 2000
Features:

        * Added keyboard zoom shortcuts

Version 1.12
------------
Date    : May 2001
Features:
        
        * Quits if database not found
        * Working path set correctly (current directory)
        * Fixed river attributes in shapefile format
        * Fixed exposed canvas callback which allows 
          non HP X library displays to successfully
          select with mouse

Version 1.13
------------
Date    : Feb. 2002
Features:

        * linux version
        * Support for read only/24 bit color
        * Handles lack of rfc layer cleaner

Version 1.14
------------
Date    : Mar. 2002
Features:

        * More efficient calculation of major rivers
        * Changed filter names -> Within CWA, etc...
        * Changing Vector/Point color interface issues fixed
        * More verbose error messages in shape_file creation
        * More verbose error messages in exporting arcs and
          objects in general
        * Fixed filtering, and does more filtering local rather
          than by database.

Version 1.15
------------
Date    : June 2002
Features:

        * Displays version upon terminal error
        * Binary search fixed in exporting vectors
        * Export rivers finishes cleanly

Version 1.16
------------
Date    : June 2004
Features:
        * Rescale on Zoom checks appropriate raster area
        * Fixed potential crash bug when closing layer

Version 1.17
------------
Date    : July 2004
Features:
        * More optimization of export filtering
        * Support for varied attribute columns in shapefile
          and Arc/INFO ungenerate .att files
        * Removed use of basin/vector aml scripts
        * Support for "multipart" GIS/RS polygons

Version 1.18
------------
Date    : Aug. 2004
Features:
        * Fixed area calculation and formatting
          in XNAV and Version 5 format
        * XNAV format no longer filters to < 3000 points

Version 1.19
------------
Date    : Dec. 2004
Features:
        * Fixed calculation of exporting region buffer
        * Fixed shapefile compatability issue in .dbf file

Version 1.20
------------
Date    : Nov. 2005
Features:
        * Fixed description values for Version 5, XNAV,
          WINQPF, and WHFS formats

Version 1.21
------------
Date    : Aug. 2006
Features:
        * PostgreSQL database version
        * Added SCHEMA config 
        * Better error handling when exporting basins
        * Slightly more explicit memory/pointer handling
        * Known bug in exporting vector attribute filtering error handling 

Version 1.22
------------
Date    : February 2007
Features:
        * Fixed closing parentheses for Version 5 polygons

Version 1.23
------------
Date    : October 2007
Features:
        * Fixed Filtering by Attribute to not exclude modified basins
        * Handles memory usage for extremely large data sets better

Version 1.24
------------
Date    : May 2009
Features:
        * Fixes sensitivity of decimal slider bar
        * More careful filtering of colinear points


// 
// End of export.hlp //
//
