topic Re: how to join permanently table to raster in Geoprocessing Questions

how to join permanently table to raster

Louis-VincentGagne — Thu, 19 Jan 2012 13:19:05 GMT

Hi,

On one side, I have a table that contains 7 colomns and one of it is a unique value, from 1 to 50 (VALUE field). On the other site, I have a raster with the VALUE field (from 1 to 50) and the COUNT fiels. I can do a right-click(on the raster)=>joins and relates to join my table to the RASTER (it appears in the attribute table from the raster).

But here is my problem, I can't make this join permanent... Is there a way to do so? exporting the raster with the join table doesn't work...

I'm using ArcMAP 10.

Thanks a lot

Re: how to join permanently table to raster

ChrisSnyder — Thu, 19 Jan 2012 15:29:36 GMT

Use the CopyRaster tool (from the toolbox). In my experience, this has preserved the join fields in the output raster.

Re: how to join permanently table to raster

Louis-VincentGagne — Thu, 19 Jan 2012 16:01:17 GMT

Hi,

CopyRaster tool does the same thing... it copies the raster but doesn't keep the join table...

Re: how to join permanently table to raster

PaulKroseman — Thu, 19 Jan 2012 19:10:16 GMT

You could create a copy of the raster, manually add the fields to the copy, join your data, then use field calculator on each field. Not great but it should work.

Re: how to join permanently table to raster

curtvprice — Thu, 19 Jan 2012 21:50:31 GMT

The way raster tools work, it really makes sense to keep attributes in a separate table if you can, as any subset or clipping of the raster data in most cases will lose all attributes except VALUE and COUNT.

That said, I believe the Join Field tool will do what you want.

Re: how to join permanently table to raster

DenisMariano — Fri, 28 Sep 2012 18:44:29 GMT

After you join all the tables you want, you can do an Extraction by mask or something like that and the new raster dataset will contain all the table`s information. I`ve done that on the World Soils Map from FAO. It worked really nice and I also extracted my area of interest.

Denis Mariano

Re: how to join permanently table to raster

DianeMcConnaughey — Thu, 15 May 2014 17:17:39 GMT

Exporting VATs to independent tables then joinig those tables back to combined GRIDs worked:) Somtimes if I did a join directly back to the GRID, I would only get the column names of the joined table, but none of the values. It would be nice if the Combine function or others allowed you to keep descriptive attributes