National Hydrology Dataset

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2
votes
1answer
126 views

Calculate line distances inside of polygon

I'm working with two data sets: NHD polyline stream layer for my entire state HUC Watershed boundary Polygons for the entire state I am looking for a way to calculate the total length of streams ...
0
votes
1answer
23 views

1:250 streams data - USA wide - where can I find it?

I have 1:250 streams data for a few western states. I find this scale to be excellent in many settings as base hydro data. I have never been able to find a USA or better yet, NA wide dataset of this ...
3
votes
2answers
185 views

Can I use QGIS 2.0.1 with the National Hydrography Dataset (NHD)?

my first post here, and i'm a trying to learn QGIS now that i've graduated and ARC is no longer an option. I am trying to download and open with QGIS state-specific data from the USGS NHD Viewer, and ...
2
votes
2answers
60 views

How to begin creating a linear referenced gdb with NHD

Our legacy fish distribution data contains data by reaches. Reaches are arbitrary locations on streams, eg. reach 1, 2, 3. Each reach's from-to are known, but not by x,y coords. An example is 'brown ...
1
vote
0answers
37 views

create table with IDs for all arcs downstream of all others

I need to summarize downstream information associated with each arc in an NHD dataset. I have a table with the downstream ID for stream segment but am not sure how to get all of the downstream IDs. ...
2
votes
1answer
198 views

Does the National Hydrology Dataset geodatabase work in qgis? [duplicate]

I am running QGIS 1.8 on a windows xp pc and trying to put the USGS National Hydrology Dataset (more info herefor Oregon into a project. I try to "add vector data", using directory option then ...
1
vote
0answers
79 views

How to get partial polyline from stream trace?

I am creating SOE to do stream trace. That works fine. The geometric network only have NHD flowline. The problem is that tracing result return whole flow line. I am wondering if the result only return ...