[mapserver-users] projection help please

[Hankley, Chip]

Steve -

IF you're state plane data is in feet, then you may need to add a line to
your projection def that will do the feet to meter conversion. I had a
similar problem with some state plane data that was in feet. Here's the
projection def for the layer that I was using.

  PROJECTION
    "proj=lcc" 
    "lat_1=45.056389" 
    "lat_2=44.745278" 
    "lat_0=44.405556" 
    "lon_0=-89.770000" 
    "x_0=74676.149352" 
    "y_0=0" 
    "ellps=GRS80"
    "datum=NAD83"
    "to_meter=0.3048006096" <-- THIS LINE
    "no_defs"
  END

This has always been confusing to me... and I just monkey around w/ it 'til
it works. We end up w/ a lot of SP data in feet...parameters are in feet,
etc.

Anyway, this worked for me. HTH.

Chip

-----Original Message-----
From: woodbri at swoodbridge.com [mailto:woodbri at swoodbridge.com]
Sent: Wednesday, July 24, 2002 12:07 PM
To: mapserver-users at lists.gis.umn.edu
Subject: [mapserver-users] projection help please


Arrrgh! This is my first attempt to work with layers in two different 
projections. I can get parcels to display, but not the roads layers 
below. The roads display just fine by themselves unprojected. The 
parcels show up just fine, they are in FL North state plane 
projection #903 and the roads are both latlong projection.

Any help would be greatly appreciated.
  -Steve W.


MAP
  NAME "gadsden"
  STATUS ON
  EXTENT 1850043.62398028 512249.445079203 2012425.97125672 
626430.515528745 
  SIZE 400 400 
  IMAGECOLOR 255 255 255
  UNITS FEET
  IMAGETYPE GIF
  WEB
    IMAGEPATH "/home/httpd/html/web2/tmp/"
    IMAGEURL "/web2/tmp/"
  END
  PROJECTION
    "proj=lcc"
    "datum=NAD83"
    "lon_0=-84d30"
    "lat_1=30d45"
    "lat_2=29d35"
    "lat_0=29"
    "x_0=600000"
    "y_0=0"
    "no_defs"
  END
  LEGEND
    STATUS ON
  END
  SCALEBAR
    STATUS ON
    UNITS MILES
    SIZE 400 10 
    STYLE 1
    COLOR 0 0 0
    TRANSPARENT ON
  END
  LAYER
    NAME "parcels"
    STATUS DEFAULT
    DATA "/data/maps/gadpar"
    TYPE POLYGON
    UNITS FEET
    LABELITEM "shortparce"
    LABELMAXSCALE 10000
    PROJECTION
      "proj=lcc"
      "datum=NAD83"
      "lon_0=-84d30"
      "lat_1=30d45"
      "lat_2=29d35"
      "lat_0=29"
      "x_0=600000"
      "y_0=0"
      "no_defs"
    END
    CLASS
      COLOR 153 255 204
      OUTLINECOLOR 0 0 0
      LABEL
        TYPE BITMAP
        SIZE TINY
        COLOR 0 0 0
        OUTLINECOLOR 255 255 255
      END
    END
  END
  LAYER
    NAME "major roads"
    STATUS ON
    DATA "/data/maps/majroads"
    TYPE LINE
    UNITS DD
    PROJECTION
      "proj=latlong"
    END
    CLASS
      COLOR 255 0 0
    END
  END
  LAYER
    NAME "minroads"
    STATUS ON
    DATA "/data/maps/minroads"
    TYPE LINE
    UNITS DD
    PROJECTION
      "proj=latlong"
    END
    CLASS
      COLOR 0 255 0
    END
  END
END