topic Slope calculation with high raster resolution in ArcGIS Pro Questions

Slope calculation with high raster resolution

Fiona — Sat, 23 Nov 2024 08:15:54 GMT

Hi,

I have a DTM with resolution in 0.25m. I use it to calculate the slope, but results seems like elevation curves, Anyone know the reason? Resample to 1m and change the symbology didn't help.

Bests,

Fiona

Re: Slope calculation with high raster resolution

DanPatterson — Sat, 23 Nov 2024 09:40:16 GMT

Did you try slope in the new

Surface Parameters (Spatial Analyst)—ArcGIS Pro | Documentation

there are more options on how the surface parameters are calculated

How Surface Parameters works—ArcGIS Pro | Documentation

Re: Slope calculation with high raster resolution

Fiona — Sat, 23 Nov 2024 11:03:03 GMT

Thank you for the suggestions, I have tried Surface Parameters, and også changed the naborhood distands to 1m/0.75m. The DTM is originally coming fra mosiac tiff, do you think it is the reason? Mosiac to new raster have been used her.

Re: Slope calculation with high raster resolution

DanPatterson — Sat, 23 Nov 2024 14:06:49 GMT

a screen grab of the issue you are experiencing might be helpful to provide further comment

Re: Slope calculation with high raster resolution

Fiona — Sat, 23 Nov 2024 15:59:31 GMT

Value from 90-0 degree.

Re: Slope calculation with high raster resolution

Fiona — Sat, 23 Nov 2024 16:10:05 GMT

I think I might be know where are the problem, the first one is after "Mosiac to new raster", the second is the original tif file. Probably the parameter in function I used were wrong.