topic Re: Need help populating a field based off a polygon in Data Management Questions

Need help populating a field based off a polygon

TheoFaull — Fri, 14 Oct 2016 10:11:54 GMT

Hi all, I'm in desperate need of some help here (time pressure!)

I have a line shapefile with a blank field. This field needs populating with the ID number of a seperate polygon shapefile it intersects. There are 400 polygons each with their own unique ID number.

How can I get these numbers into the relevant line shapes? Some sort of scripting needed (hope not!)?

Thanks!

Re: Need help populating a field based off a polygon

TheoFaull — Fri, 14 Oct 2016 10:23:21 GMT

Completely slipped my mind- SPATIAL JOIN.

I'll revive this thread should I need more help

Re: Need help populating a field based off a polygon

FC_Basson — Fri, 14 Oct 2016 10:27:48 GMT

The Spatial Join tool should do the trick (Spatial Join—Help | ArcGIS for Desktop ).

Re: Need help populating a field based off a polygon

TheoFaull — Mon, 17 Oct 2016 10:00:26 GMT

OK I'm not satisfied

Joining a polygon to a polygon will ONLY work where a polygon fals completely inside the polygon you're joining to it. I want to use intersecting polygons if possible.

Also spatial joining joins every field of the join shapefile. How can I make it join specified fields instead?

Re: Need help populating a field based off a polygon

FC_Basson — Mon, 17 Oct 2016 10:05:50 GMT

I don't think there is a tool to let you do that directly. Did you set the Match Option in the tool to use "HAVE_THEIR_CENTER_IN"? Alternatively, you could convert the polygons to a point feature class, remove the fields you don't want and then run the spatial join with the polygons and points.

Re: Need help populating a field based off a polygon

TheoFaull — Wed, 19 Oct 2016 08:34:17 GMT

Hello. The match options are only available when using the 'select by location' tool, not the sptial join tool.

Thanks for the tips though.

Re: Need help populating a field based off a polygon

FC_Basson — Wed, 19 Oct 2016 08:52:51 GMT

Yes that's correct. The link in the accepted answer refers to that tool.