projection config in mapfile
Cord Thomas
cord at LUPINEX.COM
Mon Dec 6 14:17:46 PST 2004
Have you found the documentation, particularly the documentation on the
mapfile?
http://mapserver.gis.umn.edu/doc42/mapfile-reference.html#projection
which also refers to ftp://ftp.remotesensing.org/pub/proj/OF90-284.pdf
page 57 of this document starts the discussion of State Plane Coordinate
System in proj4.
State zone numbers are here:
http://www.edc.uri.edu/nrs/classes/NRS522/Tools/StatePlaneZones.htm
Maryland appears to be in zone 4126 and have the following lambert conic
projection parameters:
1st Std.Parallel 38 18 00
2nd Std.Parallel 39 27 00
CentralMeridian -77 00 00
Origin(Latitude) 37 40 00
False Easting (m) 400000
False Northing(m) 0
Convert the degree minute second to decimal degrees:
degrees + minutes / 60 + seconds / 3600
then use the standard project format:
PROJECTION
"proj="
"ellps="
"units=ft"
"lon_0="
"lat_0="
"x_0="
"y_0="
"k="
END
Of course, an easier way is to use EPSG:
PROJECTION
"init=epsg:26985"
END
for meters
> I am new to mapserver and i am looking for some
> example of how to configure the PROJECTION tag in a
> mapfile.
>
> The example i am working in needs to be projected in
> Maryland State Plane Coordinates NAD 83
>
> Thanks
> Jon
>
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