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

Fri Jan 30 19:58:08 EST 2004

> -----Original Message-----
> From: Stephen Clark [mailto:stephen.clark at focus.ca] 
> Sent: Friday, January 30, 2004 7:57 PM
> To: Kralidis,Tom [Burlington]; 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
> 
> 
> Tom,
> 
> Is this the same as the CANIMAGE WMS layer from :
> 
> "http://wms.cits.rncan.gc.ca/cgi-bin/cubeserv.cgi?"
> 

The CanImage layer is a processed set, with no overlaps, at 15m resolution.
The CCRS Landsat are band 743, as distributed by GeoGratis.  Same base
product, different pre-processing done to the data.  IMHO, the CanImage
product looks more seamless.

> 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?
> 

No, anyone else got an idea here?

..Tom

> 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
> > >
> >
> 