[mapserver-users] Projection question

[Steve Lime]

You need to define a projection at the map level (in the mapfile) and then set a projection for the point
layer (programmatically). With those in place things should work as expected.

You could also project the point in your script from lat/lon to whatever you're using and then just
draw it as you are currently...

Steve

>>> On 11/13/2009 at 2:51 PM, in message
<0F07C89515E3460593C3926E6499F830 at SkySource>, Helen Eskina
<heskina at ubitech.com> wrote:
> Hello,
> 
> 
> 
> I have just started working with MapServer and MapScript.
> 
> I would really appreciate any help!
> 
> 
> 
> I tried to create a point on the map using GMap Demo. My point is presented
> by latlong coordinates. Below is the code.
> 
> ------------------------------------------------------------
> 
> $map = ms_newMapObj($map_path."mymap.map");
> 
>  $daLayer = ms_newLayerObj($map);
> 
>  $daLayer->set("type", MS_LAYER_POINT);
> 
> $daLayer->set("status", MS_ON);
> 
>  $class = ms_newClassObj($daLayer);
> 
>  $style = ms_newStyleObj($class);
> 
>  $style->color->setRGB(255,0,0);
> 
>  $style->set("symbolname", "circle");
> 
>  $style->set("size", 10);
> 
> $my_point = ms_newpointObj();
> 
> 
> 
> $my_point->setXY(45.322500,-75.669167);
> 
>  $image=$map->draw();
> 
>  $my_point->draw( $map, $daLayer, $image, 0, "Point" );
> 
> 
> 
>  $image_url=$image->saveWebImage();
> 
> -----------------------------------------------------------------------
> 
> The point is shown on the map, but in the wrong place. I understand that it
> is probably because the projection is wrong.
> 
> 
> 
> How to find out which projection is used in the map file?
> 
> MAP file:
> 
> MAP
> 
> NAME DEMO
> 
> STATUS ON
> 
> #SIZE 400 300
> 
> SIZE 800 600
> 
> SYMBOLSET ../etc/symbols.sym
> 
> EXTENT -2200000 -712631 3072800 3840000
> 
> UNITS METERS
> 
> SHAPEPATH "../data"
> 
> IMAGECOLOR 255 255 255
> 
> FONTSET ../etc/fonts.txt
> 
> 
> 
> LAYER
> 
>   NAME bathymetry
> 
>   METADATA
> 
>     "DESCRIPTION" "Elevation/Bathymetry"
> 
>   END
> 
>   TYPE RASTER
> 
>   STATUS ON
> 
>   DATA bath_mapserver.tif
> 
> END
> 
> 
> 
> 
> 
> Thank you.