[Mapserver-users] I have some landsat 7 data that I want to tile : overlap + transparency

[Stephen Clark]

Tom,

Is this the same as the CANIMAGE WMS layer from :

"http://wms.cits.rncan.gc.ca/cgi-bin/cubeserv.cgi?"

If so I already have this layer added to MapServer.

My use of Landsat 7 Imagery is for a backdrop in my PDF files.  But I cannot
get the WMS server to produce a 300 dpi image so I need to copy them locally
to produce the 300 dpi PDF files.

Do you know of a WMS command that will produce an image ad a particular DPI?

thanks
Stephen

----- Original Message ----- 
From: "Kralidis,Tom [Burlington]" <Tom.Kralidis at ec.gc.ca>
To: "'Stephen Clark'" <stephen.clark at focus.ca>; "Frank Warmerdam"
<warmerdam at pobox.com>
Cc: <mapserver-users at lists.gis.umn.edu>
Sent: Friday, January 30, 2004 2:59 PM
Subject: RE: [Mapserver-users] I have some landsat 7 data that I want to
tile : overlap + transparency


>
> Hi Stephen,
>
> What are your requirements for using the Landsat 7 Orthoimagery in
> MapServer?
>
> The CCRS WMS has the entire Landsat 7 Orthorectified Imagery collection,
> which is on GeoGratis, available as OGC:WMS:
>
> URL: http://ceoware2.ccrs.nrcan.gc.ca/cubewerx/cubeserv/cubeserv.cgi
> Layer name: L7O_B743:CEOWARE2
>
> Note that this layer is also timestamped, i.e. you can query via TIME in
> OGC:WMS also.  The scenes' black areas are transparent.
>
> Just thought it'd be easier to point to an OGC:WMS of this data rather
than
> roll your own.
>
> Another comment: I'd be interested, as a separate exercise, how MapServer
> deals with overlapping images in a given layer.  What kind of algorithm is
> done between scenes which overlap?
>
> Thanks
>
> ..Tom
>
> =========================
> Tom Kralidis
> Systems Scientist
> Environment Canada
> Tel: +01-905-336-4409
> http://www.ec.gc.ca/cise/
>
> =========================
>
> > -----Original Message-----
> > From: Stephen Clark [mailto:stephen.clark at focus.ca]
> > Sent: Friday, January 30, 2004 6:52 PM
> > To: Frank Warmerdam
> > Cc: mapserver-users at lists.gis.umn.edu
> > Subject: Re: [Mapserver-users] I have some landsat 7 data
> > that I want to tile : overlap + transparency
> >
> >
> > Frank,
> >
> > My landsat data is from the Geogratis web site :
> >
> > http://geogratis.cgdi.gc.ca/download/landsat_7/ortho/geotiff/utm/
> >
> > Specifically these three scenes as example:
> >
> > http://geogratis.cgdi.gc.ca/download/landsat_7/ortho/geotiff/u
> > tm/047021/
> > http://geogratis.cgdi.gc.ca/download/landsat_7/ortho/geotiff/u
> > tm/048021/
> > http://geogratis.cgdi.gc.ca/download/landsat_7/ortho/geotiff/u
> > tm/049021/
> >
> > I compressed the files to ECW and produced this layer:
> >
> > LAYER
> >   NAME landsat_048_021_rgb
> >   DATA
> > "d:/datasets/imagery/landsat/ecw/048021_0100_990804_l7_743_utm10.ecw"
> >   TYPE RASTER
> >   STATUS ON
> >   TRANSPARENCY 60
> >
> >   # turn off the black background in the image files
> >    OFFSITE 0 0 0
> > END
> >
> >
> > >Do all the images have the same background value?   YES -- they do.
> > There is a residual amount of black fuzziness around the
> > scenes after using the above OFFSITE command.
> >
> > Here is a LAYER file for the tiled index of Landsat scenes:
> >
> > LAYER
> >   NAME landsat_tile
> >   TILEINDEX "d:/datasets/imagery/landsat/landsat_index.shp"
> >   TILEITEM "location"
> >   TYPE RASTER
> >   STATUS ON
> >   TRANSPARENCY 60
> >
> >   # turn off the black background in the image files
> >   OFFSITE 0 0 0
> >
> >   METADATA
> >     WMS_TITLE "Lansdat 7 Imagery "
> >     WMS_ABSTRACT "N/A"
> >     WMS_SRS "EPSG:26910"
> >   END
> >
> > END
> >
> > But this tiled layer does not have any transparency.  How
> > would I fix this?
> >
> > thanks
> > Stephen
> >
> > ----- Original Message ----- 
> > From: "Frank Warmerdam" <warmerdam at pobox.com>
> > To: "Stephen Clark" <stephen.clark at focus.ca>
> > Cc: <mapserver-users at lists.gis.umn.edu>
> > Sent: Friday, January 30, 2004 2:31 PM
> > Subject: Re: [Mapserver-users] I have some landsat 7 data
> > that I want to tile : overlap + transparency
> >
> >
> > > Stephen Clark wrote:
> > > > Hi All,
> > > >
> > > >
> > > > I have some landsat 7 data that I want to tile but the scenes
> > > > overlap.
> > > >
> > > > Can I use some sort of command that can be added to the
> > "gdaltindex"
> > > > command to add a transparency value to these scenes so that the
> > > > overlap areas can show through.
> > >
> > > Stephen,
> > >
> > > Do all the images have the same background value?  If so, use it as
> > > the offsite value for the whole layer and it will be used
> > with all the
> > > images. The other alternative is to store the tiles in a format for
> > > which GDAL recognises "nodata" values, but this isn't very
> > convenient
> > > to arrange. There is no way to include nodata values in the raster
> > > tile index.
> > >
> > > 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    | Geospatial
> > Programmer for Rent
> > >
> > >
> > >
> >
> > _______________________________________________
> > Mapserver-users mailing list
> > Mapserver-users at lists.gis.umn.edu
> > http://lists.gis.umn.edu/mailman/listinfo/maps> erver-users
> >
>