Greetings:
I am performing some navigation and distance calculations using the
excellent NHD-Plus
Hydrography dataset created for the EPA:
http://www.horizon-systems.com/nhdplus/
Using the ArcMap GIS and Arc Hydro toolsets. Specifically, I am using
the ESRI Network Analyst
package to calculate flow paths between lakes connected by stream
networks (and represented as points
on the network). The computation methods take full advantage of the
ArcMap network data model.
My question is: Has anyone in the community used the GRASS v.net. tools
in conjunction with the
NHD-Plus data set? It would be good to be able to take advantages of all
of the information
encoded in the NHD-Plus data using open-source tools; I suspect that
some custom programming
might be necessary to do so (for example, to trace stream networks
'upstream' or filter out lower-order
stream segments). If anyone has worked in this area, I'd appreciate
hearing about your experiences...
Regards,
Rick Reeves
begin:vcard
fn:Rick Reeves
n:Reeves;Rick
org:UC Santa Barbara;National Center For Ecological Analysis and Synthesis
adr:Suite 300;;735 State Street;Santa Barbara;CA;93101;USA
email;internet:[EMAIL PROTECTED]
title:Rick Reeves, Scientific Programmer/Analyst
tel;work:805 892 2533
url:http://www.nceas.ucsb.edu
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