projection problem
Ethan Alpert
ealpert at DIGITALGLOBE.COM
Wed Dec 15 12:03:45 PST 2004
Did you try setting STATUS DEFAULT instead of STATUS ON?
-e
-----Original Message-----
From: Camden Daily [mailto:cdaily at gmail.com]
Sent: Wednesday, December 15, 2004 1:00 PM
To: Ethan Alpert
Subject: Re: [UMN_MAPSERVER-USERS] projection problem
I tried feet as well, but to no avail. Could you point me to where I
can look up the EPSG code for my projection?
Thanks,
-Camden Daily
On Wed, 15 Dec 2004 12:51:44 -0700, Ethan Alpert
<ealpert at digitalglobe.com> wrote:
>
> Looks like you have units meters and the data has units feet.
>
> Also is there NAD support in your version of libproj4? I seem to recal
> there are legality problems wrt distribution of NAD support in
> libproj4 and you need to dowload it separately.
>
> You may also want to look up the EPSG code for your projection and try
> that rather than the proj parameters.
>
> -e
>
> -----Original Message-----
> From: Camden Daily [mailto:cdaily at gmail.com]
> Sent: Wednesday, December 15, 2004 12:49 PM
> To: Ethan Alpert
> Subject: Re: [UMN_MAPSERVER-USERS] projection problem
>
> Yeah, I've given that a shot as well, but no luck!
>
> Thanks though,
> -Camden Daily
>
> On Wed, 15 Dec 2004 12:46:23 -0700, Ethan Alpert
> <ealpert at digitalglobe.com> wrote:
> > Have you tried putting the projection BLOCK in the MAP block rather
> > than the LAYER?
> >
> > -e
> >
> > -----Original Message-----
> > From: UMN MapServer Users List
> > [mailto:MAPSERVER-USERS at LISTS.UMN.EDU]
> > On Behalf Of Camden Daily
> > Sent: Wednesday, December 15, 2004 12:11 PM
> > To: MAPSERVER-USERS at LISTS.UMN.EDU
> > Subject: [UMN_MAPSERVER-USERS] projection problem
> >
> > Hi all. I'm working on a mapserver application, and running into
> > issues with projections. I have absolutely no background in GIS,
> > but I've managed to hack together a pretty good map application
> > using tiger/line data, which I believe is in latlong format.
> >
> > However, I have a new shapefile I've grabbed for the mass transit in
> > my city, and it's in a completely different projection, and I have
> > no idea how to get it to work in mapserver.
> >
> > When I run ogrinfo on my new shapefile I get the following:
> >
> > ----------------------------------------------------------------
> > INFO: Open of `CTA_Line.shp'
> > using driver `ESRI Shapefile' successful.
> >
> > Layer name: CTA_Line
> > Geometry: Line String
> > Feature Count: 186
> > Extent: (1101584.450000, 1841973.900000) - (1186739.850000,
> > 1969991.020000) Layer SRS WKT:
> > PROJCS["NAD_1983_StatePlane_Illinois_East_FIPS_1201_Feet",
> > GEOGCS["GCS_North_American_1983",
> > DATUM["North_American_Datum_1983",
> > SPHEROID["GRS_1980",6378137.0,298.257222101]],
> > PRIMEM["Greenwich",0.0],
> > UNIT["Degree",0.0174532925199433]],
> > PROJECTION["Transverse_Mercator"],
> > PARAMETER["False_Easting",984250.0],
> > PARAMETER["False_Northing",0.0],
> > PARAMETER["Central_Meridian",-88.33333333333333],
> > PARAMETER["Scale_Factor",0.999975],
> > PARAMETER["Latitude_Of_Origin",36.66666666666666],
> > UNIT["Foot_US",0.3048006096012192]]
> > CTALINE_ID: Integer (11.0)
> > ROUTE: String (50.0)
> > COLOR: String (7.0)
> > SHAPE_LEN: Real (19.11)
> > SHAPE_FID: Integer (9.0)
> > ----------------------------------------------------------------
> >
> > For my mapfile, I'm using:
> >
> > ----------------------------------------------------------------
> > MAP
> >
> > NAME Chicago
> > STATUS ON
> > DEBUG ON
> > SIZE 300 300
> > IMAGETYPE PNG
> > IMAGECOLOR 240 240 240
> > SHAPEPATH "/web_system/data"
> > FONTSET "/web_system/fonts/fonts.list"
> > EXTENT 1101584.450000 1841973.900000 1186739.850000 1969991.020000
> > UNITS METERS
> >
> > WEB
> > LOG "/web_system/logs/mapserver.log"
> > IMAGEPATH "/web_system/tmp/"
> > IMAGEURL "/tmp/"
> > END
> >
> > LAYER
> > NAME "cta_line"
> > TYPE LINE
> > STATUS ON
> > DEBUG ON
> > DATA "CTA_Line"
> > CLASS
> > COLOR 0 0 0
> > END
> > PROJECTION
> > "proj=tmerc"
> > "lat_0=36.666666"
> > "lon_0=-83.333333"
> > "x_0=984250.0"
> > "y_0=0.0"
> > "k=0.999975"
> > "ellps=GRS80"
> > "datum=NAD83"
> > "to_meter=0.3048006096"
> > "no_defs"
> > END
> > END
> >
> > END
> > ----------------------------------------------------------------
> >
> > Of course, no matter how hard I try, my map always comes up blank.
> > If
>
> > anyone can see anything obvious I'm doing wrong, or can point me in
> > the right direction with how to debug projection issues, I'd greatly
> > appreciate it.
> >
> > -Camden Daily
> >
>
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