topic Re: cut polygon with an exact area in 911 GIS Questions

cut polygon with an exact area

romaingault — Tue, 19 May 2015 11:35:42 GMT

I need to cut some polygons with an exact area and I don't know how to do that!

for exemple I've got a big parcel with 10 000 m² and I need to take exactly 5200m² from the right border of my parcel

Can I do that with an existing tool in arcmap or with a python tool?

thank you for answering

Re: cut polygon with an exact area

ToddBlanchette — Tue, 19 May 2015 12:16:27 GMT

Hi Romain,

There is no tool that I'm aware of to achieve this. The closest thing I could think of would be a buffer reduction, but that's done by distance from edge, not the area, and would affect the entire polygon. As well, a tool would have to be able to "judge" what areas of the polygon you wanted cut. There are infinite ways that you could draw a cut and remove a selected area from a polygon. I'm thinking you might have to just draw some polygon clips (on an equal area projection of course) and measure them - or use the measure tool first to find an approximate shape that would work. You could then edit the shape to get as close as possible to your required output.

Re: cut polygon with an exact area

ChrisDonohue__GISP — Tue, 19 May 2015 14:51:07 GMT

If you can get the polygon data into a Parcel Fabric, there may be a way to do this with the Parcel Editor Tools. Here's some information to get started:

ArcGIS Help (10.2, 10.2.1, and 10.2.2)

Chris Donohue, GISP

Re: cut polygon with an exact area

romaingault — Wed, 20 May 2015 07:14:00 GMT

Thanks for answering!

Yesterday afternoon I had a look at the parcel fabric and it's effectively probably the good solution.

I must find the time to look at the parcel fabrik it look like an complicate tool I think..

good day

Re: cut polygon with an exact area

romaingault — Thu, 28 May 2015 11:37:33 GMT

I did not have the time to try the parcel fabrik but I found a tool to do what I want: ETgeotools

In it you've got some free tools and a licence to use every tools, but " split polygon by area" looks like a free tool (for the moment 🙂 )