[Mapserver-users] Large Raster files

phatsbbnlist at twcny.rr.com phatsbbnlist at twcny.rr.com
Tue May 18 12:49:41 EDT 2004

Yes, and I left it out a few times on relevant image-coordinate system elements to see if it mattered (and it didn't unless they were in a different projection).

I used gdal_translate to convert to state plane, verified the internal world info in the geotiff that resulted, converted to png and added a .wld file and tested all these in a map file with a single layer and their appropriate projections and extents. Nothing at all appears for rasters in any of these cases, yet the shape file layers continue to appear exactly as they should.

The geotiffs from NYS in their ortho image program seem to work fine (state plane full color and infrared images at 1 and 2 foot resolution). The samples with tutorial work fine.

I suspect a subtlety that I don't know about in the UTM files (and this constitutes a great deal of ignorance), or a problem in my association with EPSG:26918 with UTM NAD83 GRS80 18N 

----- Original Message -----
From: Tyler Mitchell <TMitchell at lignum.com>
Date: Tuesday, May 18, 2004 11:19 am
Subject: Re: [Mapserver-users] Large Raster files

> You still need to setup PROJECTION for your ortho layers so that 
> Mapserver 
> knows what projection they are in.  Have you done that?
> mapserver-users-admin at lists.gis.umn.edu wrote on 05/18/2004 
> 03:53:41 AM:
> > I have a question regarding the relationship between PROJECTION 
> and 
> > EXTENT for the display of layers in the mapfile  (mapserve src 
> 4.02 and 
> > the new 4.2beta) I have managed to get a custom region working 
> using the 
> > mapderve cgi tutorial files as a start. I have successfully 
> displayed 
> > and tiled natural color ortho tiffs in EPSG:32115 (NY East state 
> plane), 
> > and I have succeeded with a UTM location that displays shape 
> files in 
> > EPSG:26918 (UTM 18N NAD83 GRS80).
> > 
> > I have downloaded 302 world-file-referenced tiffs with the 
> 1:24000 scale 
> > topo info for NYS. These are in EPSG:26918 (UTM 18NnAD83 GRS80)  
> and the 
> > extents, coordinate system and mapping have been verified in my 
> GIS 
> > program (grass 5.03).  These files will not display, neither as 
> single 
> > maps nor as a tiled map, even though the shapefile for the 
> > (with the exact same coord parameters) displays just fine (I 
> even got a 
> > county line shapefile map in latlong coordinates to plot 
> properly on the 
> > UTM basemap). No errors in the logs.  I used .tfw and .wld and 
> internal 
> > GeoTiff (gdal_translated) files all with the same null result.
> > 
> > I have searched and read the posts on related problems, and it 
> seems I 
> > have considered al the possibilities listed. I tried a gdalwarp 
> into 
> > state plane (tiff output) coordinates to see if I could 
> > onto the base EPSG:26918 map, but failed to get anything more 
> than the 
> > blank map frame.
> > 
> > Is there something about UTM and EPSG I am missing, at least as 
> they 
> > concern mapserver?
> > 
> > _______________________________________________
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