Stephen Davies wrote:
Thanks Jeff.
That seems to be the issue.
How did you know that INTERLACE=OFF was relevant to JPEGs? As I read the
doco, it is only relevant for PNG and GIF images.
That's a good question. You're right, it's not specifically stated in
the documentation. My guess is that it's something I remember from the
GD library -- there's one function called gdImageInterlace that makes
JPEGs progressive and PNG/GIF interlaced, so even if it's not
specifically stated, it makes sense to work that way in MapServer.
Do you now if phones have the same aversion to interlaced GIFs?
The only place I've had to mess with the INTERLACE option is with JPEGs.
I actually don't know for sure what the default is for PNG and GIF,
but whatever it is seemed to work fine for me.
--
Jeff Hoffmann
Head Plate Spinner
PropertyKey.com
