5 Replies Latest reply on May 21, 2012 1:10 PM by mattlove

    Adding Z values to a raster

    mattlove
      How do I add the z values from a raster that has elevation or Z values to another raster so I can then apply hillshade effect within ArcMap?
        • Re: Adding Z values to a raster
          Hornbydd
          If you have a raster that has elevation values then these are the Z values, so not sure what you are asking? Just use the Hill Shade tool.
          • Re: Adding Z values to a raster
            mattlove
            Sorry for the confusion. I have a bathymetry dataset with Z values. I want to transfer those Z values to another raster, in this case bottom sediment type so I can then apply the hillshade directly to the sediment type raster. Otherwise, overlaying the "flat" sediment type raster on the bathymetry obscures the bathymetry. Transparency is not satisfactory because of the color scheme of the underlying bathymetry altering the transparent classes of the sediment raster so the colors of the sediment classes in the legend and the classes on the map do not match. I tried to use ArcScene which allows the assignment of Z values to one layer from an underlying raster, which provides the desired effect. However I have not successfully been able to export that scene from ArcScene with the correct raster resolution to be used in ArcMap. There are a couple of resolution settings of the export that are not intuitive to me.

            I'm hoping there is a process to assign Z values from one raster to another. I need to apply Any guidance or advice is helpful. Thanks.
            • Re: Adding Z values to a raster
              erice-esristaff
              Matt,

              A pixel can have only one value.  If you gave your sediment type raster a bunch of z values it would be nothing more than a copy of the bathymetry data.  Check out this blog post called, "An alternative to overlaying layer tints on hillshades".  I think your situation would apply.

              Regards,
              Eric
              • Re: Adding Z values to a raster
                mattlove
                Thanks Eric. That solution did work. The resulting image is much darker than the original symbology. I'll have to mess around with the settings to figure them out.
                • Re: Adding Z values to a raster
                  mattlove
                  Thanks Eric. I attached a portion of each resulting tiff. The Before.tif is what the raster looked like prior to the overlay functions resulting in the After.tif raster.