I have a point feature, each point has a floating value assigned. I have a square grid (polygon) feature overlapping the points. I want to assign a value to each grid cell equal to the sum of the points' value inside the cell. Something similar to Zonal Statistics tool (ArcGIS) that can use a point layer instead of a raster for input data.
Use Spatial Join:
- Right-click polygon layer - Joins And Relates - Joins. Select Join data from another layer based on spatial location
- Specify the Point layer
- Select the first bullet (Each polygon is given a summary of the numeric attributes...) and check the Sum box
- Specify an output location and click OK
The output polygons will have the sum of all numerical attributes of the points