[MS4W-Users] Getting blank tiles in google maps

[Brent Fraser]

Vaibhav,

    There's a bug in QGIS mapserver export with the Projection 
definition.   If your target (map) projection is really longlat you need 
to have

   UNITS DD
   EXTENT ? ? ? ?
   PROJECTION
     'proj=longlat'
     'ellps=WGS84'
     'towgs84=0,0,0,0,0,0,0'
     'no_defs'
   END

and change the above "?" to valid min/max lat/lon in decimal degrees.

Or change the PROJECTION to your projection.

You should post the question to the mapserver email list.

Best Regards,
Brent Fraser


On 9/8/2011 8:23 AM, vaibhavgarg wrote:
> Hello everyone,
>
> I havent recieved any replies in few days. Please let me know what more info
> i can provide to explain better?
>
> Thanks you.
>
> Original question:
> http://osgeo-org.1803224.n2.nabble.com/Getting-blank-tiles-in-google-maps-td6746323.html
>
> ================================================
> Getting blank tiles in google maps
> ================================================
> Aug 31, 2011; 6:04pm — by   vaibhavgarg
> Hi all, I am new to MapServer.
>
> I have downloaded and setup MS4W and was able to overlay the example Bath
> and other map data on google maps.
>
> I then created my own .map file using QGIS and supplied my data but the
> served tiles are completely blank(transparant or white when I select RGB).
>
> My data set is .GML and I also tried converting it to .SHP format. I have
> checked that my setup is ok by doing is on two different computers.
>
> When I use shp2img.exe then it renders the layers properly.
> c:\>  shp2img.exe -m hampshire.map -o hampshire.png -s 2048 2048
>
> I am using this URL scheme:
> http://localhost:8088/cgi-bin/mapserv.exe?map=C:/ms4w/apps/gmap/htdocs/hampshire.map
> &layers=HampshireAreas&mode=tile&tilemode=gmap&tile=[x]+[y]+[z]
>
> I have attached all the relevant files. (2 sets, one is .SHP and the other
> is .GML, both cases I get transparent empty tiles)
>
> Can anyone please help me identify the reason why the generated tiles are
> transparent and how I can fix it.
>
> (7MB total, 1MB pieces, sorry if this is large, I am new to mailing lists
> too, please use 7Z to unzip)
> SHP: Hampshire.map Hampshire.7z.001 Hampshire.7z.002 Hampshire.7z.003
> Hampshire.7z.004 Hampshire.7z.005 Hampshire.7z.006
> GML: Hampshire-gml.map Hampshire-gml.7z
>
> Alternate download (zip format, 14mb) http://www.megaupload.com/?d=DAD6SR5P
>
> Thanks you very much.
>
> Vaibhav G
>
>
> --
> View this message in context: http://osgeo-org.1803224.n2.nabble.com/Getting-blank-tiles-in-google-maps-tp6746323p6772023.html
> Sent from the ms4w-users mailing list archive at Nabble.com.
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