HPGN Datum? (fwd)

[Bill Binko]

On Mon, 25 Apr 2005, Dean C. Mikkelsen wrote:

> Hi Bill,
>
> Have you applied the PROJECTION to the LAYER level on the .map file?

I have, but I've been using the init=epsg instead of the actual
parameters...
>
> What we are experiencing is the old NAD27/NAD83 problem. If PROJ.4 is
> installed correctly, with the NADCON files, there should be no problem.
>
> What does your .map file look like?

The relavent portions (I believe) are below.  There are several layers of
each projection (as well as some others).  However, these two are the ones
that I'm having trouble with.

I'm beginning to wonder if that epsg:26759 really lines up with the
parameters: perhaps I should put them in "by hand".

Thanks
Bill


MAP
...
    UNITS METERS
    EXTENT -83.16 27.62 -81.81 28.18
    PROJECTION
        "init=epsg:26759"
    END
...
    LAYER
        PROJECTION
           "init=epsg:26759"
        END
        NAME "AllParcels"
        TYPE POLYGON
        STATUS DEFAULT
        MAXSCALE 150000
        DATA "Parcel_polygons_NAD27"
        CLASS
           NAME "Parcels"
           OUTLINECOLOR 150 150 150
           COLOR 220 220 200
           SYMBOL 0
        END
   END
   LAYER
        NAME "Roads"
        TYPE LINE
        STATUS ON
        PROJECTION
                "+proj=aea"
                "+lat_1=24"
                "+lat_2=31.5"
                "+lat_0=24"
                "+lon_0=-84"
                "+x_0=400000"
                "+y_0=0"
                "+ellps=GRS80"
                "+datum=NAD83"
                "+units=m"
                "+no_defs"
        END
        DATA "tgrr0052"
        LABELITEM "FENAME"
        CLASS
                NAME "Roads"
                COLOR 200 200 200
                SYMBOL 0
                LABEL
                        TYPE TRUETYPE
                        ANGLE AUTO
                        #ANTIALIAS true
                        color 0 0 0
                        OUTLINECOLOR 255 255 255
                        FONT arial
                        SIZE 10
                        MINFEATURESIZE 40
                END
        END
    END
END

>
> Cheers,
> Dean
>
>
> Dean C. Mikkelsen,B.Sc.,P.Eng.
> Principal Consultant
> Terra ETL Ltd. - Consultants on GIS & Geodesy
> Vancouver, B.C., Canada
> Phone: 604-929-8630
> E-mail: dcmikkelsen at shaw.ca
>
>
>
> -----Original Message-----
> From: UMN MapServer Users List [mailto:MAPSERVER-USERS at LISTS.UMN.EDU] On
> Behalf Of Bill Binko
> Sent: April 25, 2005 8:35 AM
> To: MAPSERVER-USERS at LISTS.UMN.EDU
> Subject: Re: [UMN_MAPSERVER-USERS] HPGN Datum? (fwd)
>
> Once again forgot to cc the list: sorry
>
> ---------- Forwarded message ----------
> Date: Mon, 25 Apr 2005 11:21:27 -0400 (EDT)
> From: Bill Binko <bill at binko.net>
> To: Dean C. Mikkelsen <dcmikkelsen at shaw.ca>
> Subject: RE: [UMN_MAPSERVER-USERS] HPGN Datum?
>
> On Sun, 24 Apr 2005, Dean C. Mikkelsen wrote:
> >
> > Hi Bill,
> >
> > Sure, feel free to post them to the board. I'll take a look.
> >
> > Cheers,
> > Dean
> >
>
> Here are the two projections that are giving me fits (from the shapefile
> .prj files).  When I place them on the same map, they simply don't line
> up.
>
> From FGDL (HARN projection):
>
> PROJCS["Albers Conical Equal Area (Florida Geographic Data Library)",
> GEOGCS["GCS_North_American_1983_HARN",DATUM["D_North_American_1983_HARN"
> ,
> SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],
> UNIT["Degree",0.0174532925199433]],PROJECTION["Albers"],
> PARAMETER["False_Easting",400000.0],PARAMETER["False_Northing",0.0],
> PARAMETER["Central_Meridian",-84.0],PARAMETER["Standard_Parallel_1",24.0
> ],
> PARAMETER["Standard_Parallel_2",31.5],PARAMETER["Central_Parallel",24.0]
> ,UNIT["Meter",1.0]]
>
> From the Pinellas County Data ("Florida West") which I've been using
> epsg:26759:
>
> PROJCS["NAD27 Florida State Planes, Western Zone, US Foot",
> GEOGCS["North_American_Datum_1927",DATUM["D_North_American_1927",
> SPHEROID["Clarke -
> 1866",6378206.4,294.9786982139006]],PRIMEM["Greenwich",0],
> UNIT["Degree",0.017453292519943295]],PROJECTION["Transverse_Mercator"],
> PARAMETER["latitude_of_origin",24.3333333333333],PARAMETER["central_meri
> dian",-82],
> PARAMETER["scale_factor",0.9999411765],PARAMETER["false_easting",500000]
> ,
> PARAMETER["false_northing",0],UNIT["Foot_US",0.3048006]]
>
> Thanks
> Bill
>
>