MapServer Spatial Extent
Ryan Ollerenshaw
ollerery at ENGR.ORST.EDU
Thu Sep 21 13:32:04 PDT 2006
I have a shapfile of the continents thats current longitude extent is
from -180 to 180 and i need the extent to be from 0 to 360. I was able
to change the projection in ArcCatalog and display the map there with
the changed extent but when i copied this shapfile back to my MapServer,
MapServer still displayed the shapfile from -180 to 180. and you can
see that in the extent of the shapefile when ogrinfo is ran on it. but
you can also see the projection information that ArcCatalog added that
says there should be a false easting of -180 to correct for this. So
does anyone know why MapServer is still displaying the layer with an
extent from -180 to 180? I am using ESPG:4326 as my projection.
# ogrinfo -al -so world_adm0.shp
INFO: Open of `world_adm0.shp'
using driver `ESRI Shapefile' successful.
Layer name: world_adm0
Geometry: Polygon
Feature Count: 209
Extent: (-180.000183, -90.000000) - (180.000000, 83.623032)
Layer SRS WKT:
PROJCS["WGS_360",
GEOGCS["GCS_WGS_1984",
DATUM["WGS_1984",
SPHEROID["WGS_1984",6378137.0,298.257223563]],
PRIMEM["Greenwich",0.0],
UNIT["Degree",0.0174532925199433]],
PROJECTION["Cylindrical_Equal_Area"],
PARAMETER["False_Easting",-180.0],
PARAMETER["False_Northing",0.0],
PARAMETER["Central_Meridian",180.0],
PARAMETER["Standard_Parallel_1",0.0],
UNIT["Meter",1.0]]
NAME: String (40.0)
GMI_CNTRY: String (3.0)
REGION: String (25.0)
The map Layer looks like this:
LAYER
NAME "world"
STATUS ON
TYPE POLYGON
#labelitem "name"
DATA "world_adm0.shp"
PROJECTION
"init=epsg:4326"
END
METADATA
wms_title "continent outline"
wms_srs "EPSG:4326"
END
CLASS
STYLE
OUTLINECOLOR 200 200 200
COLOR 255 255 0
SYMBOL 0
END
LABEL
COLOR 255 255 0
TYPE TRUETYPE
FONT times
SIZE 9
POSITION AUTO
PARTIALS FALSE
BUFFER 3
END
END
END
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