[Mapserver-users] GRID problems

[Martin Weinelt]

Dear list,

last couple of days I tried to add a geographic grid to maps of the 
following projection: geographic, LAEA north pole, LAEA south pole, 
Mercator.

While it went fine with the lon/lat maps I am facing problems with the 
projected maps. For both of the polar aspect maps, the central parts 
of the maps (around the poles) either get no graticule or the CGI 
crashes while trying to render the map. With the Mercator map  	
erroneous meridians get rendered from the northen map boundary to the 
center of the projection (0/0). Zooming to this center sometimes also 
crashes the CGI. Obviously the problem is to project the grid in 
special (projection dependent) parts. 

Am I missing s/thing or can somebody comment on my problem?
The following is an example of my mapfiles for the LAEA North 
projection - the others are similar.

### MAP: #####
PROJECTION 
  "proj=laea"
  "lat_0=90"
  "lon_0=0"
  "x_0=0"
  "y_0=0"
  "units=m"
  "ellps=WGS84"
  "datum=WGS84"
END 

### THE GRID #####
LAYER
  NAME "Graticule"
  PROJECTION
    "proj=latlong"        
    "ellps=WGS84"
    "datum=WGS84"
  END
  TYPE LINE
  STATUS DEFAULT
  CLASS
    SYMBOL "line"
    SIZE 2
    COLOR 120 120 120
     LABEL
    [ .... ] 
     END # label
  END # class
  GRID
    MINSUBDIVIDE 64               
    MAXSUBDIVIDE 64                              
    MAXARCS 6  
   LABELFORMAT "DDMM"                                                 
  END
END

Thanks, Martin