topic Re: How to join two rasters in New to GIS Questions

How to join two rasters

DavideGalimberti — Sat, 30 May 2015 23:21:56 GMT

Hi!

I was wondering if it is possible to do the following thing: I have a DTM (with the elevation for each cell) and from this one, through some operations, I have obtained another raster (where only some cells, with certain properties, have a value of 1, while the others have a value of 0). Now I would like to create a raster where, for each cell, both the elevation and the value 0 or 1 are associated. Is it possible?

Then I would like to create a 3d model (after having created the TIN from the DTM, of course), where every cell is coloured according to the previous 0-1 values. Is it possible?

Re: How to join two rasters

DanPatterson_Retired — Sun, 31 May 2015 00:15:21 GMT

assuming you have all the extensions (Spatial Analyst, 3D analyst) and assuming you want the map and not necessarily composite data for statistical and/or other analysis purposes. you could try:

create the Tin or raster grid (using projected coordinates of course...)
in the 3D analysts ArcScene you can produce your 3D scene and drape the binary raster over it (maybe even with transparency) to visually co-locate the 0 and 1s with their elevation partners.

Should you need to perform any analyses, you can use ZonalStatistics (2 variants) in the Spatial Analyst extension to derive your preliminary data.

There are a bunch of thing that you can do, depending upon your background/exposure to ArcMap

For example the Combine tool can do a physical combination but be aware of the limitations posted in the link.

Re: How to join two rasters

DavideGalimberti — Sun, 31 May 2015 12:13:23 GMT

Thank you very much! I managed to do that with ArcScene!