This is a fairly "simple" GIS operation but I wanted to ask, is Spatial Join the only, or best, method to calculate this? As described in this article:
...and I know there are issues when points fall outside of the polygon. I found this article that discusses using the Proximity tool to calculate that:
Have you tried using the PointCollection object? I'm not sure what platform you're on, but on the ArcGIS Runtime for .NET there is a PointCollection class in this namespace "Esri.ArcGISRuntime.Geometry".
You could use this to build a collection of points, and then transpose them to a polygon as needed. Keeping track of the MapPoint count should be straightforward at this point.
As I mentioned, i'm not sure what platform you're working on, but an implementation (in .NET) that comes to mind would be a wrapper class that held a PointCollection as well a Polygon Feature. As the PointCollection was updated, the Polygon would be re-drawn on a graphics layer.
I'm running ArcGIS 10.3.1 Desktop (ArcMap) on Windows 10, 64-bit. I am not sure that I would want a graphics layer as opposed to a feature class within a geodatabase. And, I am not as familiar with .NET as I once was year ago...
You'd need to re-run the operation for each changed geometry, when it is changed. This sort of thing is better left to a database trigger, but then you'd need to be using an enterprise geodatabase.
I was afraid that I would need to re-run it each time. Would a database trigger be something you would script up in Python or so? And do you have to use an enterprise geodatabase for it?
