topic Re: Changing point data into occurrence squares in Spatial Statistics Questions

Changing point data into occurrence squares

TiffanyMiller — Fri, 02 Nov 2012 19:38:10 GMT

I have some point data that measures the number of occurrences at each point. Is it possible for me to change the data from point to a raster for the occurrences where the squares are all connected? How can I do this? The data needs to be color coded from the most occurrences to the least occurrences. [ATTACH=CONFIG]18982[/ATTACH]
This is an image of the data to get an idea of what I'm looking at. Thanks!

Re: Changing point data into occurrence squares

MarcinGasior — Mon, 05 Nov 2012 10:35:04 GMT

I guess you want to create continous surface raster.
It can be done using one of Interpolation methods available in Spatial Analyst extension.

An interpolation will produce best results in areas where there's many points and/or point are evenly distributed. That's why an interpolation result from your data for south part of Gulf of Mexico may not be accurate.

Re: Changing point data into occurrence squares

ThomMackey — Thu, 08 Nov 2012 00:30:04 GMT

There are a couple of other options, too. You can use the Point Statistics tool in the Spatial Analyst toolbox using a 1x1 cell neighbourhood & the SUM statistics type to count the number of occurrences in each raster cell.

If you don't need a raster, you could use the Create Fishnet GP tool to make regular polygons over the region, and then do a spatial join to count the number of points. You'll have to look at the SUM statistic in the result of the spatial join tool to count the number of occurrences.

Hope that helps.