Pixel's information value of raster tiff.

[Farid Vakilzadeh]

Dear all

I am using several DEM Tiff files and displaying them by using
TILEINDEX in my map file.My problem is that I can get the information
of a pixel in DEM raster file except its elevation. Each pixel can be
queried and I could get the coordinates of pixels by using variables
[mapx],[mapy] in my template file. Also each pixel in DEM file has an
elevation value that I don't know how I can get it or by using which
variable . I'll appreciate if any one can help me.

Farid