[mapserver-users] Projection Woes - How to do it (i.e. i really need some help)

[Ed McNierney]

Chip -

The first thing to do is correct the spelling of "ellps" in the line "elips=clrk66".

	- Ed

Ed McNierney
Chief Mapmaker
TopoZone.com
ed at topozone.com
(978) 251-4242


-----Original Message-----
From: Hankley, Chip [mailto:Chip.Hankley at GASAI.Com]
Sent: Thursday, May 09, 2002 12:54 PM
To: MapServer List (E-mail)
Subject: [mapserver-users] Projection Woes - How to do it (i.e. i really
need some help)


Fiddling with projection-on-the-fly today. Working w/ the 3.5 CGI versions
of MapServer, on Win2K, with IIS. When I try to load a mapfile with a
projection specified, I get the following error (map file below):

msProcessProjection(): Projection library error. major axis or radius = 0 or
not given

I'm totally confused by what's in (or not in) the documentation.

1) Do I need to have some local file (like a library) defining projections
somewhere? Where does it go? Do I need to do something different if using
MapScript?

2) What extent do I define in my header: the extent of the map projection,
or the extent of my layer.

3) Why am I getting this error?

TIA!

Chip



NAME library
EXTENT 280482.067224 206170.386312 778816.444758 746364.850613SIZE 400 400
FONTSET "C:\Inetpub\wwwroot\mapserv\ms_symbols\fonts\fonts.list"
SHAPEPATH "C:\ESRI\ESRIDATA\USA\"
SYMBOLSET "C:\Inetpub\wwwroot\MapSymbols\symbol.sym"
UNITS meters
IMAGECOLOR 255 255 255

#
# Projection definition
#
PROJECTION
  "proj=utm"
  "ellps=GRS80"
  "zone=15"
  "north"
  "no_defs"
END
    

WEB
  TEMPLATE default.html
  IMAGEPATH "C:\Inetpub\wwwroot\tmp\"
  IMAGEURL "/tmp/"
END

SCALEBAR
  STATUS ON
  INTERVALS 2
  SIZE 125 2
  COLOR 0 0 0
  BACKGROUNDCOLOR  255 255 255
  OUTLINECOLOR 0 0 0
  UNITS feet
  LABEL
    COLOR 0 0 0
    SIZE small
  END
END

LAYER
  NAME Counties
  TYPE Polygon
  STATUS on
  PROJECTION
    "proj=latlong"
    "elips=clrk66"
  END
  DATA "Counties"
    CLASS
      Name 'Ctyppoly.shp'
      OUTLINECOLOR 0 0 0
    END  # CLASS
END  # LAYER

END