[mapserver-users] Tilemode Projection Problem

[Fawcett, David (MPCA)]

Ian,

I haven't used tilemode, but my assumption is that the map projection block is used to define what the output projection for your tile is (like in the other MapServer modes).

Try setting map projection to epsg:3785 or using the proj4 text:

+proj=merc +lon_0=0 +k=1 +x_0=0 +y_0=0 +a=6378137 +b=6378137 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs

If tilemode requires a map extent, it should be expressed in units of the output projection.

David.

From: mapserver-users-bounces at lists.osgeo.org [mailto:mapserver-users-bounces at lists.osgeo.org] On Behalf Of Ian Dees
Sent: Wednesday, January 06, 2010 2:24 PM
To: mapserver-users at lists.osgeo.org
Subject: [mapserver-users] Tilemode Projection Problem

Hi everyone,

I've spent the better part of today scouring the internet for documentation and help on the tile mode present in mapserver, but I couldn't find an answer to my problem, so please forgive me if I'm missing some obvious documentation some where...

I am attempting to show some GeoTIFFs (from here: ftp://geoftp.ibge.gov.br/mapas/ortofoto/). My research says they're in epsg:31984.

I'm trying to use MapServer's tile mode to display them on a Google Map API instance, but can't seem to get any of the images to show up.

Also, why am I required to give a PROJECTION statement as a child to the MAP statement (what I assume is the "viewing projection") if the tile mode is just going to reproject to spherical mercator?

My .map file is below.

Thanks!

MAP
        NAME GMAP_TILE
        STATUS ON

        PROJECTION "init=epsg:31984" END

        IMAGECOLOR 192 192 192
        IMAGEQUALITY 95
        IMAGETYPE png

        OUTPUTFORMAT
                NAME png
                DRIVER 'GD/PNG'
                TRANSPARENT ON
        END

        LAYER
                NAME brazil
                TYPE raster
                DATA "/var/www/map/2414-1-SO.tif"
                STATUS ON
                PROJECTION "init=epsg:31984" END
        END
END
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