Finding uphill or downhill areas along a road

474
2
01-17-2012 08:33 AM
Highlighted
New Contributor
Hi everyone,
I need to determine uphill or downhill areas along a road section in a raster map. I know MapCal program can only do this for 100x100 pixels. But my study area (1500x1500 pixels) is too big to run this program. I was wondering if there is way to do this in ArcGIS.

Thanks in advance.

-Mike
Tags (2)
Reply
0 Kudos
2 Replies
Highlighted
New Contributor II
If you have a digital elevation model of your area and the spatial analyst extension for ArcMap then you can use spatial analyst to determine slope. Then you can reclassify the slope raster to highlight areas within a given slope range which is your uphill and downhill areas depending on which way your traveling on the road. You could also create a buffer polygon along your road to clip out only the area under the road that your interested in.

Hope this helps,

Tyler
Reply
0 Kudos
Highlighted
New Contributor
If you have a digital elevation model of your area and the spatial analyst extension for ArcMap then you can use spatial analyst to determine slope. Then you can reclassify the slope raster to highlight areas within a given slope range which is your uphill and downhill areas depending on which way your traveling on the road. You could also create a buffer polygon along your road to clip out only the area under the road that your interested in.

Hope this helps,

Tyler


Hmm Ok I got the point. Thank you, Tyler, for your help.
Reply
0 Kudos