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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