I would like to know how can I change my map to squares with an specific size (62,500 ft2 – 360,000 ft2).
To something like this, but with smaller squares:
There are several ways to do this. Here's some methods. Note also the Important Considerations below.
1). If you have access to the Spatial Analyst Extension, you could convert your polyyons to raster using the Feature To Raster Geoprocesing tool (or one of the several vector to conversion tools), specifying the size of the square. Then convert that raster back to vector.
Here's the help for ArcGIS Pro, which will give you a general idea of how it works. Look up the specifics in the help for your version and software, as there may be differences:
Feature to Raster—Conversion toolbox | ArcGIS for Desktop
Raster to Polygon—Conversion toolbox | ArcGIS for Desktop
2). You could create a Fishnet for your project extent. Then use a Spatial Join to attach the attributes to the fishnet. Last, delete the polygons on the exterior that did not cover the input data. The Spatial Join could be performed with either the Geoprocessing tool of the same name or by doing a Join to the Attribute Table of the Fishnet based on Location.
Create Fishnet—Help | ArcGIS for Desktop
Spatial Join—Help | ArcGIS for Desktop
Before running any process, you will need to decide what the desired result will be when one of the "squares" covers multiple polygons in your input data. In other words, what value would you expect to end up assigned to the "square" in your new fishnet or raster? The above methods will produce different results, so this will need to be considered.
Some possibilities (there are several):
- Average of all values covered by the new "square"
- Only the value at the exact center of the "square"
To resolve this:
Chris Donohue, GISP
you could rasterize it to produce a grid.
I don't thin a fishnet with a spatial join would work, but you could give that a shot.
A cartogram is often used to distort space to represent quantities, but I don't know of any that produce squares.
That's all for now
I made a video doing it:Fishnet - Arcgis ArcMap 10.4 - YouTube
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