Extracting roads from a DTM

DominicHsiao — Wed, 08 Feb 2023 01:23:11 GMT

We are trying to detect roads in DTM, one thing we have done is created a slope map which clearly defines roads. However, there is a lot of noise due to the tops of the mountains and ridges which are flat. Is there a way to filter out the noise, i.e. the mountain tops. Or is there a completely different solution that we should look into to? We don't want to use satellite imagery, because it doesn't match our DTM. Eventually, we want to use this as a mask for roads. This will be done by inverting the colors. However, when that is done the noise is really prevalent.

This is the slope map, the main noise is coming from lower-middle section on the left side.

Inverted slope map with modified exposure setting to try to drown out the noise

Re: Extracting roads from a DTM

Taren_Esri — Wed, 08 Feb 2023 21:13:39 GMT

Hi @DominicHsiao

I was able to find an existing discussion on this topic here. Hopefully it is of some help!

Best,

Taren

Re: Extracting roads from a DTM

DominicHsiao — Wed, 08 Feb 2023 23:01:20 GMT

Thanks! Really appreciate it.

topic Re: Extracting roads from a DTM in ArcGIS Pro Questions

Extracting roads from a DTM

Re: Extracting roads from a DTM

Re: Extracting roads from a DTM