Thanks for the advice on using Slab. That gets me a couple of steps closer to my goal. I have now run into another difficulty. I want to Construct a field corresponding to the TIFF image, but with actual (x,y) positions, then attach the image colors to this field. My reason for doing this is so that I then hope to use Map to map these colors onto the rubbersheeted image of the field with the elevation data. To use Map I believe I need the two fields to be in the same coordinate system.
I have been doing some testing with Construct and Map to see how to map colors, without much success. My simple test has two Constructed fields which are identically created. I pass each through Autocolor (here I vary the parameters) then use Map with Positions and Colors, i.e. I try to map the colors of one field onto the other. This gives an error message about unsupported color format. If I send the output of each Autocolor module to Image it displays OK. Am I trying to do something with Map that it was not designed to do? Sorry for asking so many questions. Gib NOTICE - This e-mail is only intended to be read by the named recipient. It may contain information which is confidential, proprietary or the subject of legal privilege. If you are not the intended recipient please notify the sender immediately and delete this e-mail. You may not use any information contained in it. Legal privilege is not waived because you have read this e-mail. For further information on the Beca Group of Companies, visit our web page http://www.beca.co.nz
