[mapserver-users] Re: Font/Symbol size change with different MapServer

[myOpenLayersUName]

Since you folks are usually so good on this forum, the lack of response to my
previous reply suggests there is something wrong with my question. I'm
guessing there's something about this that I just don't get which is
glaringly obvious to anyone who knows anything about it. I'm hoping someone
can help me understand what might be causing the discrepancy I am seeing
between our two different environments and further, where to look to verify
those differences exist.

In the map file in question no DEFRESOLUTION is set; so, as I understand the
documentation I have found, it defaults to 72. The RESOLUTION is set in the
map file to 96. Since the DEFRESOLUTION and RESOLUTION are different, "the
symbology in the layer definitions will be adjusted by a factor
corresponding to RESOLUTION/DEFRESOLUTION. More specifically, this is done
by multiplying the layer->scalefactor value by the resolution/defresolution
ratio in msPrepareImage()." Finally, the documentation suggests that these
parameters will affect size (for symbols and labels)...sure sounds like it's
related to my problem.

However, as the map file is the same on both machines (extracted directly
from our source control), there has to be something different about the
MapServer configuration itself that is causing the factor computed "by
multiplying the layer->scalefactor value by the resolution/defresolution
ratio" to come up with different values on the different machines and
drawing the symbols and labels different sizes. Somewhere along the way,
some value is being used that is different and I'm trying to identify what
and where that might be so I can make sure they are the same.

If any of this suggests that I have a completely wrong understanding of this
stuff, please let me know where I can find a more detailed explanation. Or,
if this is the wrong track, I'd appreciate being pointed in another
direction. As it is at the moment, I'm completely stuck.

Cheers,
jtm

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