Hi,

I have set up GeoServer with the integrated GeoWebCache. I am accessing my
"mn2gt" layer-group (gridset EPSG:900913) tile server service as below:
http://localhost:8080/geoserver/gwc/service/tms/1.0.0/mn2gt@EPSG:900913@png/1/0/0.png

It seems that by default the y-alignment of tiles in geowebcache is from
left bottom origin. My client which uses these tiles expects the origin to
be left top. I see that there is an xml element <alignTop> which can be set
to true in geowebcache.xml for a given gridset. However since, EPSG:900913
is defined by default, I cannot seem to redefine it in my geowebcache.xml
file with the <alignTop> tag set to true.

I have also tried to create a copy of the EPSG:900913 gridset and named it
my_EPSG:900913 and tried using this gridset in my geowebcache.xml with
<alignTop> set to true, and ensuring that my mn2gt layer uses gridset
my_EPSG:900913, but it does not seem to have any effect.

Can someone please advise me on how to force GeoWebCache to align the origin
to the top left instead of bottom left? Thanks,

Harv Hundal



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