[OSRS-PROJ] orthographic projection with proj4 and mapserver.

[Gerald I. Evenden]

Whatever "on-the-fly" means?

Presumably "mapserver" is some kind of graphic program.

On the surface, it appears that points beyond the visible rim
are not being properly sensed for their "invisiblity."  PROJ
should return an error for such points and the graphic program
should properly sense them.  With information provided, it is
difficult to know who to blame.

PS: the colors on the *.png file make for a *very* hard read.
 
On Wed, 2003-08-13 at 12:50, Tom H wrote:
> Hi list,
> 
> I have an orthographic projection working with mapserver and proj4 here;
> http://www.scriptsupport.co.uk/images/mapserv3.png
> 
> the problem is that around the edges, the on-the-fly projection seems to
> be creating area that is not defined on the projection, and is being dumped
> into the centre of the image. and the interpolation of the boundary is creating
> lines that cause that "shards" effect on the image.
> 
> Is there any way to modify the projection parameters to correct for that overlap?
> 
> my projection section is like this;
> Map projection;
> 
>  	PROJECTION
>  	  #"proj=laea"
>  	  "proj=ortho"
>  	  "ellps=WGS84" <--- maybe change this to something else
>  	  "lat_0=51.0000"
>  	  "lon_0=0.0000"
>  	  "x_0=0.00"
>  	  "y_0=0.00"
>  	END
> 
> Layer;	
> 
> 	PROJECTION
> 		"proj=latlong"
> 		"ellps=WGS84" <--- maybe change this to something else
> 	END
> 
> Thanks in Advance.
> 
> T.
> 
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-- 
Gerald I. Evenden <gerald.evenden at verizon.net>

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