1

I think this is a pretty basic GIS operation but I'm not sure how to do it.

I have hundreds of polygons, and within each polygon there is point data (see picture). The point data has a field "Type" that can either be A, B, C, D, or E. I would like to determine what is the most dominant Type value for each polygon.

How do I go about doing this using ArcMap?

Example

  • If you also seek QGIS answers to the same question please feel free to ask a separate question. All questions are free of charge and more focused questions help you to get more votes to unlock site functionality. – PolyGeo Jul 2 '18 at 20:21
  • This is almost exact duplicate of gis.stackexchange.com/questions/217729/… because your points represent a raster that can be nicely converted into polygons. – FelixIP Jul 3 '18 at 5:39
1

Using ArcMap:

enter image description here

1- Polygon shapefile should have the field (id).

2- Spatial join as follows:

enter image description here

enter image description here

3- Summary statistics

enter image description here

And the final result:

enter image description here

  • Incomplete solution, what is dominant point type for polygon ID = 2? – FelixIP Jul 3 '18 at 5:38
  • Yeah, this solution took me most of the way to the answer. From here I exported to a CSV, then used a Python script to determine the dominant type. – Nick Jul 3 '18 at 19:38

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.