Hi,
Some days ago I sent a message about matching of Google Maps Zoom
levels to ScaleDenomintaor to use inside SLD documents. Forget about
it, is wrong 
No, what I did not consider is that the world is a sphere and the
scale changes when you move north and south in a flat map. Actually
Google Maps is very smart and changes the scale dynamically when you
move with it.
So, after some time investigating a good range of values that will let
me switch correctly in almost every latitude I got into something. Is
not perfect but for Euope and EEUU works fine. For other parts of the
world also of course, but you might have to tune a little bit the
ranges so that your country doesn't fail in the middle of a transition
from a scale to another. Is much better to show it in a map:
http://synthesys.csic.es/gmap/GmapExample.php
The SLD document is available here:
http://synthesys.csic.es/SLD/GMapExample.sld.xml
I know, I know, I should write all this on the wiki, I promise I will
do when I have a little bit more of time. Together with a nice way of
editing and testing SLD. You just have to edit the SLD document in a
file accessible trough http to the geoserver and use the SLD
parameter, for example:
http://synthesys.csic.es:8080/geoserver/wms?&REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.1&LAYERS=tdwg:world_countries&STYLES=&FORMAT=image/png&BGCOLOR=0xFFFFFF&TRANSPARENT=TRUE&SRS=EPSG:41001&BBOX=-9985163.032194631,4992581.569375542,-4992581.516097316,9985163.03209607&WIDTH=256&HEIGHT=256&reaspect=false&SLD=http%3A%2F%2Fsynthesys.csic.es%2FSLD%2FGMapExample.sld.xml
Then you cna modify your SLD and directly refrsh the page to see if it
works or not 
Pity that the WMS specifications set incorrectly the
mime type of the reponse because when I get an error Firefox ask me to
download it and I have to open it...
Hope this is useful.
Javier.
Thanks for the cool information Javier. If you want me to start a wiki page for you just ask.
Brent Owens
(The Open Planning Project)
Javier de la Torre wrote:
Hi,
Some days ago I sent a message about matching of Google Maps Zoom
levels to ScaleDenomintaor to use inside SLD documents. Forget about
it, is wrong
No, what I did not consider is that the world is a sphere and the
scale changes when you move north and south in a flat map. Actually
Google Maps is very smart and changes the scale dynamically when you
move with it.
So, after some time investigating a good range of values that will let
me switch correctly in almost every latitude I got into something. Is
not perfect but for Euope and EEUU works fine. For other parts of the
world also of course, but you might have to tune a little bit the
ranges so that your country doesn't fail in the middle of a transition
from a scale to another. Is much better to show it in a map:
http://synthesys.csic.es/gmap/GmapExample.php
The SLD document is available here:
http://synthesys.csic.es/SLD/GMapExample.sld.xml
I know, I know, I should write all this on the wiki, I promise I will
do when I have a little bit more of time. Together with a nice way of
editing and testing SLD. You just have to edit the SLD document in a
file accessible trough http to the geoserver and use the SLD
parameter, for example:
http://synthesys.csic.es:8080/geoserver/wms?&REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.1&LAYERS=tdwg:world_countries&STYLES=&FORMAT=image/png&BGCOLOR=0xFFFFFF&TRANSPARENT=TRUE&SRS=EPSG:41001&BBOX=-9985163.032194631,4992581.569375542,-4992581.516097316,9985163.03209607&WIDTH=256&HEIGHT=256&reaspect=false&SLD=http%3A%2F%2Fsynthesys.csic.es%2FSLD%2FGMapExample.sld.xml
Then you cna modify your SLD and directly refrsh the page to see if it
works or not Pity that the WMS specifications set incorrectly the
mime type of the reponse because when I get an error Firefox ask me to
download it and I have to open it...
Hope this is useful.
Javier.
_______________________________________________
Geoserver-users mailing list
Geoserver-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/geoserver-users
Well, this information should probably just go directly on: http://docs.codehaus.org/display/GEOSDOC/Google+Maps
I'll include at least a link to this email there now... If someone has some time to port more than go for it.
C
Brent Owens wrote:
Thanks for the cool information Javier. If you want me to start a wiki page for you just ask.
Brent Owens
(The Open Planning Project)
Javier de la Torre wrote:
Hi,
Some days ago I sent a message about matching of Google Maps Zoom
levels to ScaleDenomintaor to use inside SLD documents. Forget about
it, is wrong
No, what I did not consider is that the world is a sphere and the
scale changes when you move north and south in a flat map. Actually
Google Maps is very smart and changes the scale dynamically when you
move with it.
So, after some time investigating a good range of values that will let
me switch correctly in almost every latitude I got into something. Is
not perfect but for Euope and EEUU works fine. For other parts of the
world also of course, but you might have to tune a little bit the
ranges so that your country doesn't fail in the middle of a transition
from a scale to another. Is much better to show it in a map:
http://synthesys.csic.es/gmap/GmapExample.php
The SLD document is available here:
http://synthesys.csic.es/SLD/GMapExample.sld.xml
I know, I know, I should write all this on the wiki, I promise I will
do when I have a little bit more of time. Together with a nice way of
editing and testing SLD. You just have to edit the SLD document in a
file accessible trough http to the geoserver and use the SLD
parameter, for example:
http://synthesys.csic.es:8080/geoserver/wms?&REQUEST=GetMap&SERVICE=WMS&VERSION=1.1.1&LAYERS=tdwg:world_countries&STYLES=&FORMAT=image/png&BGCOLOR=0xFFFFFF&TRANSPARENT=TRUE&SRS=EPSG:41001&BBOX=-9985163.032194631,4992581.569375542,-4992581.516097316,9985163.03209607&WIDTH=256&HEIGHT=256&reaspect=false&SLD=http%3A%2F%2Fsynthesys.csic.es%2FSLD%2FGMapExample.sld.xml
Then you cna modify your SLD and directly refrsh the page to see if it
works or not Pity that the WMS specifications set incorrectly the
mime type of the reponse because when I get an error Firefox ask me to
download it and I have to open it...
Hope this is useful.
Javier.
_______________________________________________
Geoserver-users mailing list
Geoserver-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/geoserver-users
_______________________________________________
Geoserver-users mailing list
Geoserver-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/geoserver-users
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--
Chris Holmes
The Open Planning Project
http://topp.openplans.org