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Rivers

S

StayinArrive

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us-northcarolina
Is it possible to find and trace lowest elevations in the terrain to route a river? I'm working on a stock airport I'm familiar with that has a nearby river.
I've used a Google Earth aerial image to route it but it doesn't match the terrain. I don't care if the river is placed exactly where the aerial shows it. Just
that it's not going up hill.
 
You can do that with ArcGIS, it's pretty easy:
1. Load your Digital Elevation Model into ArcGIS:
zwischenablage012bjk8.jpg


2. Fill data errors in the DEM (Spatial Analyst -> Hydrology -> Fill):
zwischenablage022hk8i.jpg


3. Create a raster with the water flow direction (Spatial Analyst -> Hydrology -> Flow Direction):
zwischenablage03g7jrj.jpg


4. Run the Flow Accumulation Tool to get the rivers (Spatial Analyst -> Hydrology -> Flow Accumulation):
zwischenablage04uqj29.jpg


5. Depending on what you need you can convert the raster to a shapefile:
zwischenablage05nhk2b.jpg


And that's it...
I hope that helps!
 
MatthiasKNU said:
You can do that with ArcGIS, it's pretty easy:
1. Load your Digital Elevation Model into ArcGIS:
zwischenablage012bjk8.jpg


2. Fill data errors in the DEM (Spatial Analyst -> Hydrology -> Fill):
zwischenablage022hk8i.jpg


3. Create a raster with the water flow direction (Spatial Analyst -> Hydrology -> Flow Direction):
zwischenablage03g7jrj.jpg


4. Run the Flow Accumulation Tool to get the rivers (Spatial Analyst -> Hydrology -> Flow Accumulation):
zwischenablage04uqj29.jpg


5. Depending on what you need you can convert the raster to a shapefile:
zwischenablage05nhk2b.jpg


And that's it...
I hope that helps!
Click to expand...

Lol...you call that easy? But thanks Matthias....maybe an old dog like me can learn a new trick. Let's start with what is a Digital Elevation Model? :oops:
 
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