On Fri, Jul 15, 2011 at 4:05 PM, Stephen V. Mather <
[email protected]> wrote:
> Hi All,****
>
> This is probably a fussy question, but I want to label my
> contours with the font of the label facing upright from the downslope side,
> so the map reader can always tell which way is uphill. If I use the vendor
> option:****
>
> ** **
>
> <VendorOption name="forceLeftToRight">false</VendorOption>****
>
> ** **
>
> I get the opposite of what I want (i.e my geometries run the wrong way).
> Short of reversing all my geometries’ orientation so that the labels will
> face the right way, might there be another trick with, e.g. a filter
> function to get the result I want, or am I asking too much from a filter
> function?****
>
> **
>
Filter functions + geometry transformations would be the right fit for your
case, unfortunately we
don't have one to reverse a linestring, but it can be built.
See in GeoTools, library/main, the list of existing functions, and in
META-INF of the same
module, the registration that makes them pluggable: this should give you
enough to implement
yours if you want to, doing the actual reverse is a matter of calling the
"reverse" method
on the linestring/multilinestring
Cheers
Andrea
--
-------------------------------------------------------
Ing. Andrea Aime
GeoSolutions S.A.S.
Tech lead
Via Poggio alle Viti 1187
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 962313
http://www.geo-solutions.it
http://geo-solutions.blogspot.com/
http://www.youtube.com/user/GeoSolutionsIT
http://www.linkedin.com/in/andreaaime
http://twitter.com/geowolf
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