topic Re: How to edit dem using points in ArcGIS Pro Questions

How to edit dem using points

AyazTariq — Mon, 13 Dec 2021 12:17:20 GMT

I've created a DEM 1 inch per pixel, using GCPs and photogrammetry in another program.
Now my surveyor has collected many survey points (topo points) of that area (hundreds of points), by overlaying that survey points on dem using ArcGis Pro I can see there is a height difference in these points and DEM ( 0.5 cm to 5 cm).
Is there any tool in ArcGIS Pro that can rectify or edit existing DEM using that survey points?
are us can say I want to tight my dem or want to get more accurate dem using that survey points.

note: I'm at the beginner level in ArcGIS products.

Thanks in advance for your guidance.

Re: How to edit dem using points

DanPatterson — Mon, 13 Dec 2021 12:38:43 GMT

you can create a new raster with the updated values.

convert the point file to a raster using the dem's cell size and extent and using it as the snap raster.

Con (Spatial Analyst)—ArcGIS Pro | Documentation

generically Con(Pnts, Pnts, OldDEM)

which basically means use the survey points if there is a value, otherwise use the old dem values

Re: How to edit dem using points

AyazTariq — Mon, 13 Dec 2021 13:14:12 GMT

Thanks for the reply, can you please explain a little more or suggest a specific tutorial.

actually, I'm new to ArcGIS Pro