National Hydrology Dataset

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2answers
13 views

Unable to create geometric network on NHDFlowline - invalid enabled field type

I need to create a geometric network in order to perform a downstream trace on a NHDFlowline data in my ArcGIS. I have two flowline layers on one of them I am able to create a geometric network and ...
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26 views

Trace Geometric Network generates empty output on downstream trace with flags snapped to edge

Using the ArcGIS toolbox version of Trace Geometric Network, I have tried using a set of points snapped the the edges of the NHD flowlines. I tried to trace downstream without barriers. When I run ...
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18 views

Incorporating NHD Area or Waterbody data into contributing area delineations?

I am working on delineating several watersheds for lakes - and of course the delineations are not perfect. I am using the Arc Hydro tool, which I am new to and having difficulty with. As such, I am ...
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1answer
77 views

NHD layers won't redraw in ArcGIS 10.1 at small scale?

If I am already zoomed in to a smaller scale and then add the NHD Hydrography dataset (already clipped to just Texas), I can see all the NHDFlowlines, NHDAreas, and other layers that come in the ...
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2answers
6k views

Calculate line distances inside of polygons using ArcGIS for Desktop?

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 ...
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1answer
27 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 ...
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2answers
448 views

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

I'm a trying to learn QGIS. I am trying to download and open with QGIS state-specific data from the USGS NHD Viewer, and i think i have at least managed to do the downloading correctly. For example, ...
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2answers
110 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 ...
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43 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
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1answer
297 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 ...
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101 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 ...