Pre-RFC,
pulling rendering/labeling parameters from attributes...
Frank Warmerdam
warmerdam at POBOX.COM
Tue Jun 6 21:24:19 EDT 2006
Stephen Woodbridge wrote:
> Ok, glad I read this one before posting the exact same thing! only I
> would have done my example like:
>
> SIZE [sizeattribute]
> ANGLE ([angleattribute] - 90.0)
> LABEL
> TEXT ("Label: " . [labelattribute] . ".")
> END
>
> This would require a lot of changes, but could be fully backwards
> compatible.
SteveW,
I assume part of the benefit here is that we can use the same substitution
engine used for expressions? (and I guess actually evaluating in the
expressions in the ANGLE case above).
I certainly like this degree of generality, though internally I would like
to see a fixed value and possibly a simple variable substitution handled
via some sort of short cut to reduce the amount of expression processing for
each feature. I would hate to have ANGLE 0 result in a full expression parse
and evaluation for each feature.
Best regards,
--
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I set the clouds in motion - turn up | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush | President OSGF, http://osgeo.org
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