Questions tagged [nhd]
National Hydrology Dataset
12
questions
0
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0answers
14 views
Select paths downstream from multiple points in ArcMap
I have two datasets - (1) a stream network (National Hydrography Dataset) and (2) a rail network. I want to create a dataset of all streams that are downstream a given distance from the intersection ...
0
votes
1answer
25 views
Using Spatial Join to join geologic features to polylines
I want to spatially join polygons (geologic features, major aquifers) to where the NHD polylines (rivers/streams) fall. I want to be able to click on a polyline and see what geologic feature or major ...
1
vote
0answers
32 views
Remeasuring portion of NHD route system?
How do I remeasure a portion of the NHD route system? So that it measures continuous through each confluence, that is, if 0 station is at the first confluence then when we reach the next confluence it ...
1
vote
2answers
132 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 ...
0
votes
1answer
264 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 ...
3
votes
2answers
16k 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 ...
0
votes
1answer
53 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 ...
5
votes
2answers
658 views
Using QGIS with National Hydrography Dataset (NHD)? [closed]
I'm a trying to learn QGIS. I am trying to download and open with QGIS 2.0.1 state-specific data from the USGS NHD Viewer, and i think i have at least managed to do the downloading correctly. For ...
2
votes
2answers
158 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
48 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
412 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
108 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 ...
