Dave: I handle this on the client-side by changing the imagetype (in 5.0 this would be done using &map.imagetype=JPEG or map.imagetype=PNG) as necessary just before submitting the request. Here's a site that does just that:
http://www.dnr.state.mn.us/maps/fom/mapper.html Only when the orthophotos are on do I request jpegs. Otherwise it's a gif. Steve >>> Dave Fuhry <[EMAIL PROTECTED]> 09/17/07 1:11 PM >>> I'm using CGI mapserver, and would like it to return JPEGs when an ortho layer is active, and 8-bit PNGs otherwise. The CGI reference makes no reference of an exposed IMAGETYPE or equivalent parameter. Variable substitution in the mapfile (IMAGETYPE "%param%") doesn't seem to work. Are there any easy ways to conditionally specify the IMAGETYPE using CGI mapserver, or will I have to preprocess the mapfile? Thanks, Dave Fuhry
