topic Re: How do I create a boundary for my raster/polygon layer? in Higher Education Questions

How do I create a boundary for my raster/polygon layer?

JeromeWu — Thu, 16 Apr 2020 03:31:56 GMT

Hi folks, I am trying to perform a walkability analysis for Sacramento, CA. I converted the service area polygon shapefiles for each locations in Sacramento into raster layers. However, I need to have my raster layers within a boundary like the figure on the left, so I can define raw raster values of 0-1. Right now, my polygon shapefiles & raster layers are stand alone so they only have a single value of 1.

Does anyone know how to do this? Am I supposed to create the boundary with the service area polygons before I convert them to raster?

Thank you!

Re: How do I create a boundary for my raster/polygon layer?

mneer — Thu, 16 Apr 2020 14:38:52 GMT

If you are trying to create a 'boundary" from the raster you can use the "raster to polygon" GP tool found in the conversions tools set->From Raster-> "Raster to Polygon"

If you are trying to Clip them based on a boundary just do a "clip raster" GP tool. found in Raster->Raster Processing->"Clip Raster"

Clip Raster—Data Management toolbox | Documentation

Raster to Polygon—Conversion toolbox | Documentation

Re: How do I create a boundary for my raster/polygon layer?

JeromeWu — Thu, 16 Apr 2020 23:52:01 GMT

I figured it out. I had to Reclassify my raster layers and specify the processing extent and raster analysis mask.

Thanks!