[OpenLayers-Users] Google EPSG:900913 and Italian EPSG:3003

[Umberto Nicoletti]

You're probably missing some params in the epsg definition of 3003. it
should look like this:

+proj=tmerc +lat_0=0 +lon_0=9 +k=0.999600 +x_0=1500000 +y_0=0
+ellps=intl +units=m +no_defs
+towgs84=-104.1,-49.1,-9.9,0.971,-2.917,0.714,-11.68 +to +proj=latlong
+datum=WGS84

the important bits are +towgs84=-104.1,-49.1,-9.9,0.971,-2.917,0.714,-11.68

Cheers,
Umberto

On Tue, Jul 6, 2010 at 2:44 PM, Kiks <enrico.oemi at gmail.com> wrote:
>
> Ok, thanks, now I manage in overlapping layers, but I still have a little
> accurance problem: it seems that there are around 20 meters of distance
> between the same point in google and in my maps.
>
>
> Phil Scadden wrote:
>>
>>
>>> but the google satellite map is not beeing reprojected...
>>>
>> As far as I know, you can reproject your vector features on the fly (say
>> from 3003 to 900913) but you cannot
>> reproject imagery of any sort on the fly. If you use google imagery, you
>> are stuck with getting everything else
>> into that projection.
>> --
>> Phil Scadden, Senior Scientist GNS Science Ltd 764 Cumberland St,
>> Private Bag 1930, Dunedin, New Zealand Ph +64 3 4799663, fax +64 3 477
>> 5232
>>
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