keep only one point per raster resolution value

Question

hello! I have a dataset of points from which I'm extracting a number of values from 1km^2 resolution rasters. however for analytical purposes, I only want to keep one randomly selected point per 1km^2 cell. is there a way to filter my points and only select and keep one point per cell? thanks!

nmarieh · Answer

ahh gotcha, I think I've got it working now, if I set the number of points as the number in the current set and accept that I won't end up with that many. the first time I tried Delete Identical, I had the same number of points I'd started with.

thanks for the help!

JayantaPoddar · Answer

That is exactly what Delete Identical with predefined XY Tolerance was supposed to do.

What went wrong in these steps?

Considering the maximum distance of two points within a cell can be the "diagonal length" of the cell. So keep the XY Tolerance = 1414 Meters

Please share the issues in executing these steps, if any.

nmarieh · Answer

hmm this didn't work for me, but I've almost got what I want by using Create Random Points and then setting the constraining feature class to be my existing dataset of points. the problem is I need to preset the number of points I want to end up, when really I just want ArcGIS to give me the max number of points possible such that no points are <1km apart.