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Inverse Drive Time Shape

JamesWenyon

Good Day All,

I am working a little bit with drive time and I was wondering if there was a setting or a tool that I could run to get the inverse shape of a feature. For example I have a picture attached that has drive time for hospitals in green. Is there a process I can run other than tracing/drawing that can create me a shape of everything not in green.

Any advice to get me in the right direction would be greatly appreciated. My main goal is to create a shape to display areas outside the drive time.

One thing I was able to do was create a new field and say yes or no if the parcel is inside the drive time zone. BUT I would like to create a shape if I can.

inverseDT.JPG

FIGURE 2 ‎- Microsoft Edge.png

summ_stat_cd_dyn2_filter.jpg

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DavidPike

I don't know if I'm oversimplifying or misunderstanding, but you can just take a larger polygon (draw a rectangle feature class/shapefile around your current extent) and then erase the drivetime polygon from it Erase (Analysis)—ArcGIS Pro | Documentation.

I know you said you don't want to draw anything but it is very painless.

All comments

DavidPike

Ah, well. If it works.

I just read the documentation on pairwise erase and still have no idea what the difference is.

JamesWenyon

Hi David,

I had never used the erase tool since it is part of the advanced license.

But, I was able to do a pairwise erase and from what I can tell the process did what it was supposed to do. For some reason erase is not part the basic license but pairwise erase is apart of basic licensing.

DavidPike

I know you said you don't want to draw anything but it is very painless.

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