topic Joins in ArcGIS Pro Questions

Joins

SLouq — Tue, 27 Apr 2021 13:49:42 GMT

I have a point feature class and I have some contour line, what I am trying to do is find the most accurate way to join the two so I can populate my point feature with it's correct contour value. The most logical way to me would be to do a spatial join. Just right click my point feature -> Join and Relates -> Spatial Join. I have been using the Intersect Match Option with a 50 ft Search Radius but this is leaving me with some null values. So I am not sure if this is the correct way to do what I am trying to do.

What would be the correct way to accomplish this task?

Thanks

Re: Joins

Robert_LeClair — Tue, 27 Apr 2021 14:04:11 GMT

If you have an elevation raster dataset, you could use the Extract Multi Values to Points geoprocessing tool to extract the Z-value from the raster cell. There's some interesting use cases you can read about here. And I believe you can use DEM's from ArcGIS Online and/or the Living Atlas if you don't have a DEM for your area of interest. Might work better than a Spatial Join perhaps. Good luck!

Re: Joins

SLouq — Tue, 27 Apr 2021 14:09:22 GMT

I have lidar data. I created Contour lines and DEMs from the Lidar. Just trying to figure out the best way to get the elevation values to my address points feature.

Thanks for the reply!

Re: Joins

jcarlson — Tue, 27 Apr 2021 14:18:19 GMT

I would look at using Near to identify the nearest line. Spatial Join should be able to pick up the contours, especially with a generous search radius, but Near doesn't require a search radius, so it will find the nearest feature regardless of distance.

You could then add a join or relate based on the NEAR_FID field that is output.

If you don't want to create a new Feature Class, but rather populate a field in the existing class, you may want to look into using Arcpy instead.