[mapserver-users] Tilemode Projection Problem

[Ian Dees]

I tried this and am still not getting anything from my TIFFs. I switched
over to using the statesp020.shp data (which is epsg:4326, right?) and am
getting very oddly-garbled tiles:

http://209.98.160.119:8080/map.html

On Wed, Jan 6, 2010 at 2:41 PM, Fawcett, David (MPCA) <
David.Fawcett at state.mn.us> wrote:

>  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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