Custom Tools for Refining the NHD
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Custom Tools for Refining the NHD in Idaho Presented by Wilma Robertson Date March 2, 2010. Water Features maintained in National Hydrography Dataset (NHD). http://nhd.usgs.gov/. NHD can and should be continuously updated IDWR undertakes projects to actively collect data

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Custom Tools for Refining the NHD

in Idaho

Presented by Wilma Robertson

Date March 2, 2010



http://www.idwr.idaho.gov/hydrography/


People or organizations provide (NHD)local knowledge to update the NHD

They are ..

Expert

GIS Users

IDWR wants to make it as easy as possible for the public to communicate hydro edits to IDWR

The “easiest” way depends on the type of user

Occasional GIS User

Non-GIS Public


Expert (NHD)

GIS Users

Occasional GIS User

Non-GIS Public

Internet application



Large organization (NHD):

Sub-stewards using USGS Editing tools. 14 new people trained last January!

Smaller organizations:Digital spatial data (i.e. shapefiles, geodatabases, etc.)

Expert

GIS Users

Occasional GIS User

Non-GIS Public


Customized Editing Tools are designed for those users! (NHD)

Expert

GIS Users

Have ArcGIS ArcView

Limited GIS skills

Occasional GIS User

Non-GIS Public


People to test our (NHD)internet application or our customized editing tools

Due to budget cuts we are not able to award a ..



A different personal geodatabase is edited to capture changes that need to be made to the “background” layer

We provided Canal Company with best available data (combination of existing NHD, NAIP Imagery and Historical maps)

This “background” layer remains unchanged.

Metadata is collected separately


Example: need to add a missing flowline changes that need to be made to the “background” layer

Step 1: Start editing session

Edit “Minidoka_Canals”


Step 2: Use sketch tool to draw new flowline changes that need to be made to the “background” layer

Step 3: When you finish a sketch, bring up the following dialog box:


Step 4: Complete entries in edit tool dialog box: changes that need to be made to the “background” layer

FTYPE restricts user to values used in the NHD

We are adding a new feature

Names are set up as a domain. Users can type in new names that are then automatically added to drop-down box for the next edit.

No FCODES (yet).


Correction has been added to “Minidoka_Canals” personal geodatabase

Example 2: Turns out that newly added line only flows to X. Need to delete flowline left of the X

X

1. Use edit tool draw on top of portions that should be deleted


2. Complete form entries: geodatabase

3. Result:

IDWR will use FID to determine which are the most recent updates and use those



We will be working on the next version of this tool that will better address connectivity and flow directions.


Questions? will better address connectivity and flow directions.

Linda.Davis@idwr.idaho.gov

Wilma.Robertson@idwr.idaho.gov

http://www.idwr.idaho.gov/hydrography/


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