I need the ability to be able to display ECW and JPEG2000 format files within MapServer via a Community Mapbuilder client which sends WMS requests for the images to MapServer

[Frank Warmerdam]

John Mitchell wrote:
> Hi,
> 
> I need the ability to be able to display ECW and JPEG2000 format files 
> within MapServer via a Community Mapbuilder client which sends WMS 
> requests for the images to MapServer.  My current architecture is 
> PostGreSQL database connected to PostGIS which connects to GeoServer on 
> Apache Tomcat and Community Mapbuilder client which sends WMS requests 
> for the images to GeoServer.  I would like to be able to send similar 
> requests to MapServer for compressed Raster data but instead of going to 
> PostGIS I would like to connect to the ECW (which are compressed Raster) 
> files and JPEG2000 files.
> Since I have never installed or used MapServer before I would appreciate 
> it if someone could give my a high level overview of what I would need 
> to do as far as:
> 
> 1.) What should I download for a windows server if all I want to do is 
> display ECW and JPEG2000 files via WMS? 
> 2.) What configuration is necessary on the server in order to display 
> via WMS for ECW and JPEG2000 files and what location should I place 
> these files?
> 3.) What is the format for both a GetMap and GetCapabilities request on 
> the client side which in my case is Community Mapbuilder.

John,

You don't specify what platform you want to deploy on.  The trick with
JPEG2000 and ECW support is getting a binary build for your platform that
has these formats included.

I have a service at http://maps.gdal.org serving a big south american
landsat scene from ecw.  I'll provide details on my configuration.  You
may find it helpful to take a similar approach.

I am using the "standalone" FWTools binaries for linux
(http://fwtools.maptools.org).  In my Apache cgi-bin directory I have
the script mapserv_landsat which looks like this:

-----------------------
#!/bin/sh

export MS_MAPFILE=/home/warmerda/maps/landsat.map
. /opt/FWTools-1.0.0a2/fwtools_env.sh
exec /opt/FWTools-1.0.0a2/bin/mapserv "$*"
-----------------------

This basically invokes the FWTools mapserver executable with a
preconfigured mapfile.  The FWTools binaries include essentially all
required libraries.  The mapfile looks like the following and includes
sufficient metadat to serve via WMS and WCS.  I think there may be a
bit of extra cruft in there too.

MAP

   NAME 'LANDSAT'

   EXTENT -180 -90 180 90
   UNITS DD
   SIZE 600 300
   IMAGECOLOR 0 255 0

   IMAGETYPE JPEG
   DEBUG ON

   PROJECTION
     "init=epsg:4326"
   END

OUTPUTFORMAT
  NAME jpeg2000
  DRIVER "GDAL/JP2ECW"
  MIMETYPE "image/jpeg2000"
  FORMATOPTION "TARGET=95"
  IMAGEMODE RGB
END
#
# Start of web interface definition
#


   WEB
     HEADER web/landsatcgi/demo_header.html
     TEMPLATE web/landsatcgi/demo.html
     FOOTER web/landsatcgi/demo_footer.html
     METADATA
       "ows_title" "Landsat Server"
       "wcs_label" "Landsat WCS Server"
       "wcs_keywordlist" "WCS,Landsat"
       "wcs_onlineresource" "http://maps.gdal.org/cgi-bin/mapserv_landsat"
     END
     IMAGEURL "/tmp/"
     IMAGEPATH "/u/maps/tmp/"
   END

   LAYER
     NAME "South America"
     STATUS ON
     DEBUG ON
     TYPE RASTER
     DATA '/home/warmerda/torrents/data/South America Landsat742.ecw'
     METADATA
       wcs_label "Landsat"
       ows_title "Landsat"
       ows_srs	"EPSG:4269 EPSG:4326"
       ows_extent "-82.3512420 -56.8510672 -33.9029540 13.0499433"
       wcs_resolution "0.00025602 0.00025602"
       wcs_formats "JPEG PNG24"
       wcs_nativeformat "ECW"
     END
     DUMP TRUE
     PROJECTION
       "init=epsg:4326"
     END
   END
END

Note that to use an ecw file (or jpeg2000 file) you just specify the
name in the DATA line for the layer.

The getcapabilities url for my service is:
 
http://maps.gdal.org/cgi-bin/mapserv_landsat?SERVICE=WMS&VERSION=1.1.1&REQUEST=GetCapabilities

I hope this helps.

Good luck,
-- 
---------------------------------------+--------------------------------------
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