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I am looking at a wildfire, and I need to display the wildfire footprint, however all I have is a raster of classes, I converted that raster to a polygon for values that show low to high burn severity, but now I need to figure out how to turn that into a footprint. Perhaps something akin to dilation.

How do I do this in ArcMap?

The picture shows the polygons and the blue line is essentially what I am trying to get as output.

enter image description here

PolyGeo
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Ryan Lima
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    I don't have access to ArcMap, but using QGIS, I would try creating a concave hull. This should be possible ni ArcMap as well, I guess. – Babel Aug 19 '21 at 21:05
  • Your blue line is an imaginary line. Still, try a concave hull. Here is some more information: https://gis.stackexchange.com/questions/1200/what-are-definition-algorithms-and-practical-solutions-for-concave-hull – GBG Aug 19 '21 at 22:44
  • Convert your raster to points and play with kernel density, I.e. different search radius and threshold in output, that you want to classify into 2 categories. – FelixIP Aug 20 '21 at 02:28

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I just tested use of kernel density and I think this is a right approach, because it gives you something objective:

enter image description here

It seems that you have more than 1 fire.

FelixIP
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