raster projector

[John Smith]

mapserver rocks on-the-fly!

now what's the best way to avoid on-the-fly proj because that decreases
performance. do i have to manually rectify geotiff to vector in arcmap
(think human error)?

thanks a bunch man

jzs

http://mapserver.gis.umn.edu/docs/howto/raster_data/#raster-display-performance-tips

On 11/16/06, Frank Warmerdam <warmerdam at pobox.com> wrote:
>
> John Smith wrote:
> > guys,
> > trying to put a geotiff in- works but not right. here's what's
> happening:
> >
> > i download the geotiff from national atlas. when i give no proj info
> > under LAYER it shows up but not where it should (nwis). so i copy MAP
> > proj to LAYER proj hoping for some on-the-fly magic- again it shows up
> > but nwis.
> >
> > well i go over to proj_list
> > <http://www.remotesensing.org/geotiff/proj_list/> and look up the epsg
> > (EPSG?) code (9820) from metadata but it throws the
> > "msProcessProjection(): Projection library error. no options found in
> > 'init' file" error. then i try all epsg codes given by gdalinfo ;) but
> > same error. although when i try the MAP epsg code (4326) it shows up but
> > nwis.
> >
> > so what's wrong here? think proj.exe geod.exe cs2cs.exe libgeotiff
> > listgeo'd help? now i don't think wld is needed because it's included
> > with the geotiff but i've tried with wld and no luck. i just hope i
> > don't have to rectify in arcmap. btw IMAGETYPE=png24 in case that
> matters.
>
> John,
>
> I don't believe there is an EPSG code corresponding to this coordinate
> system:
>
> PROJCS["TIFF 6.0, GeoTIFF Revision 1.0",
>     GEOGCS["WGS 84",
>         DATUM["WGS_1984",
>             SPHEROID["WGS 84",6378137,298.2572235630016,
>                 AUTHORITY["EPSG","7030"]],
>             AUTHORITY["EPSG","6326"]],
>         PRIMEM["Greenwich",0],
>         UNIT["degree",0.0174532925199433],
>         AUTHORITY["EPSG","4326"]],
>     PROJECTION["Lambert_Azimuthal_Equal_Area"],
>     PARAMETER["latitude_of_center",45],
>     PARAMETER["longitude_of_center",-100],
>     PARAMETER["false_easting",0],
>     PARAMETER["false_northing",0],
>     UNIT["metre",1,
>         AUTHORITY["EPSG","9001"]]]
>
> But the corresponding PROJECTION block to put in the LAYER definition
> is:
>
> PROJECTION
>   "+proj=laea +lat_0=45 +lon_0=-100 +x_0=0 +y_0=0 +datum=WGS84 +units=m"
> END
>
> At one time you could also put:
> PROJECTION
>   "AUTO"
> END
>
> and MapServer would read it from the geotiff file, but I'm not sure if
> this
> still works.
>
> Best regards,
> --
>
> ---------------------------------------+--------------------------------------
> I set the clouds in motion - turn up   | Frank Warmerdam,
> warmerdam at pobox.com
> light and sound - activate the windows | http://pobox.com/~warmerdam
> and watch the world go round - Rush    | President OSGeo, http://osgeo.org
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