gis-l: RE: measuring distances along NHD river (polyline)
Edwin.Abbey at dep.state.fl.us
Thu Sep 5 10:02:14 EDT 2013
Good morning Eesa,
Look for the attribute "LengthKM" in the NHDFlowline attribute table. If you have several flowlines selected, display selected records only and right-click on the "LengthKM" heading and click "Statistics". A popup window will display an assortment of statistics including a sum of the lengths of the selected records.
Alternatively, you can also right-click the heading of a the "Resolution" attribute and choose "Summarize", then in the Summarize window, select "sum" under the LengthKM attribute. Use the Browse folder for specifying the location and output file type for the table that is created (dbf, gdb table, csv, etc).
In order to select several flowlines between two points, I suggest trying to use the Utility Network Analysis toolbar. On the Analysis drop-down, select Options. From the Options window, click the Results tab. Make sure the setting for "Return results as" is set for "Selection".
Then, using the "Add Edge Flag" tool, drop a blue flag at the beginning and end of the route you are assessing. Change the Trace Task to "Find Path" and click Solve. The flowlines between the flags will be selected.
Hope this helps,
Edwin A. Abbey
NHD Coordinator - Environmental Manager
Office of Watershed Services
Florida Department of Environmental Protection
2600 Blair Stone Road, MS 3526
Tallahassee, Florida 32399
Edwin.Abbey at dep.state.fl.us<mailto:Edwin.Abbey at dep.state.fl.us>
From: gis-l-bounces at lists.dep.state.fl.us [mailto:gis-l-bounces at lists.dep.state.fl.us] On Behalf Of Ali, Eesa
Sent: Thursday, September 05, 2013 9:13 AM
To: gis-l at lists.dep.state.fl.us
Subject: gis-l: measuring distances along NHD river (polyline)
Other than dragging a line along a river using the measuring tool, what options do I have to measure distance along a polyline (river in the NHD layer)?
Environmental Specialist II
Surface Water Assessment & Monitoring Program
8800 Baymeadows Way West, Suite 100
Jacksonville, FL 32256
eesa.ali at dep.state.fl.us<mailto:eesa.ali at dep.state.fl.us>
Please take a few minutes to share your comments on the service you received from the department by clicking on this link DEP Customer Survey<http://survey.dep.state.fl.us/?refemail=Eesa.Ali@dep.state.fl.us>.
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