[Geomoose-users] NASA OnEarth wms

Thu Jan 21 16:43:53 EST 2010

Personally, I'd go Brent's option #2.

As far as I know, GeoMOOSE doesn't actually warp the image, it more tries to reproject the bounding box of the image and scale/rotate the result. You can get by with this when the projections are similar and the total extents are small. Also, I think this is OpenLayers functionality that was just exposed in GeoMOOSE.

If you need good results, I'd let MapServer consume the WMS and reproject it into your projection of choice (use mapserver as a WMS client). Then have GeoMOOSE talk to MapServer. It uses GDAL to warp the image and does a much better job. You can also optionally apply re-sampling options other than nearest neighbor and get fairly good looking images.

>>> FRANZ OKYERE <franzzoa at hotmail.com> 01/21/10 3:32 PM >>>
Hi Brent and all, I paid a visit to the hypersphere website to download a landsat tile or two and the download keeps being aborted. Is this to be expected? Otherwise I need sources to some background for the ghana, w-africa area. I'm kinda fed up with the nasa wms- i'm trying Brent's possible solution. Thanks. Franz 

> Date: Thu, 10 Dec 2009 08:12:25 -0700
> From: bfraser at geoanalytic.com
> To: richard.moore at mnsu.edu
> CC: geomoose-users at lists.sourceforge.net
> Subject: Re: [Geomoose-users] NASA OnEarth wms
> 
> This is to be expected (I think).  The providers of the various WMS servers 
> decide on which Spatial reference systems their data will be served in (usually 
> one or two).  If it is not an SRS you like, with most browser-based WMS clients 
> you cannot use the data.
> 
>    With GeoMoose v2, Dan made an enhancement to warp the imagery from the WMS 
> server SRS to the SRS you've selected in GeoMoose.  A simple warp is not a 
> rigorous map projection, so the farther you zoom out the worst the warp 
> approximation is.
> 
> Possible solutions:
>    1. Set up your GeoMoose site to use the same SRS as the WMS servers (4326? yuck!)
>    2. Pass the WMS stream through Mapserver to re-project it (use Mapserver as a 
> WMS client, then serve it up to GeoMoose).
>    3. Serve the data yourself: Dowload the Landsat data from 
> http://hypersphere.telascience.org/onearth/.  Then combine the bands for natural 
> color, fuse the pan band to increase the resolution from 30m to 15m, then do 
> some color adjusting (yikes!).
> 
> Best Regards,
> Brent Fraser
> 
> Moore, Richard J wrote:
> > Hello all,
> > 
> >  
> > 
> > I want to ask a question about the NASA Global Mosaic and how it doesn’t 
> > match up with the data at a statewide zoom and and farther out.  I added 
> > a layer EROS that uses the projection 4326 and added it similarly to the 
> > mapbook.xml as the global mosaic.  At the statewide zoom, the images and 
> > the county layers do not match up.  As you zoom in, the lines approach 
> > the correct placement on the map.
> > 
> >  
> > 
> > You can see the example of this at this site.  
> > http://gis.wrc.mnsu.edu/mrmp/geomoose.html
> > 
> >  
> > 
> > I noticed Devon Piernot had an issue with this on October 15, 2009 and 
> > didn’t see a response on the forums to his question.  Also, Efstathios 
> > Arapostathis remarked about having problems with this also.  I just 
> > installed GM 2.0.1 yesterday and had only made changes to the 
> > mapbook.xml by adding some layers.
> > 
> >  
> > 
> > Any suggestions?  I can send the mapbook if need be.
> > 
> >  
> > 
> > Thanks,
> > 
> >  
> > 
> > Rick
> > 
> >  
> > 
> > Rick Moore
> > 
> > GIS Research Analyst
> > 
> >  
> > 
> > Water Resources Center
> > 
> > 184 Trafton Science Center South
> > 
> > Minnesota State University, Mankato
> > 
> > Mankato, MN   56001
> > 
> >  
> > 
> > (507) 389-3267
> > 
> > richard.moore at mnsu.edu
> > 
> > http://mavdisk.mnsu.edu/moorer2/
> > 
> >  
> > 
> > *From:* Devon Piernot [mailto:piernotd at uwplatt.edu]
> > *Sent:* Thursday, October 15, 2009 6:12 PM
> > *To:* geomoose-users
> > *Subject:* [Geomoose-users] NASA OnEarth wms
> > 
> >  
> > 
> > First off, thank you to everyone who has helped my application get this far.
> > 
> > As with the demo, I am trying to use the NASA global mosaic in my 
> > geomoose application, but I may be having some problems with 
> > projections.  I have defined EPSG:3071, which is the Wisconsin 
> > Transverse Mercator http://www.spatialreference.org/ref/epsg/3071/ and 
> > all of my own data is in this projection, but the global mosaic does not 
> > recognize it.  When I leave the wms in EPSG:4326 the image shows up, but 
> > it matches the map less and less at smaller scales.  This can be seen on 
> > the demo here: http://gis.swwrpc.org/geomoose2/geomoose.html (zoom in 
> > and it looks ok, but zoom out and it is way off).
> > 
> > I see that the default projection for the global mosaic is EPSG:4326, 
> > does this mean that I cannot reproject it in geomoose 2.0?
> > 
> > I followed the instructions here: 
> > http://www.geomoose.org/moose/howto/wms_project.html but to no avail, 
> > which makes me believe it could be a problem with my configuration 
> > somehow.  Should I instead write a mapfile to take the wms?
> > 
> > Here is the code from my mapbook (with the default projection):
> > <map-source name="nasa" type="wms" tiled="false" projection="EPSG:4326">
> >         <url>http://wms.jpl.nasa.gov/wms.cgi</url>
> >         <layer name="global_mosaic"/>
> >         <param name="format" value="image/jpeg" reproject="true"/>
> >     </map-source>
> >    
> > ...and here is my projection:
> > Proj4js.defs["EPSG:3071"] = "+title= NAD83(HARN) / Wisconsin Transverse 
> > Mercator +proj=tmerc +lat_0=0 +lon_0=-90 +k=0.9996 +x_0=520000 
> > +y_0=-4480000 +ellps=GRS80 +units=m +no_defs";
> > 
> > 
> > Thank you all for your help
> > 
> > -- 
> > 
> > Devon Piernot
> > GIS / Web Developer
> > Southwestern Wisconsin Regional Planning Commission
> > (608) 342-6065
> > piernotd at uwplatt.edu <mailto:piernotd at uwplatt.edu>
> > www.swwrpc.org <http://www.swwrpc.org>
> > 
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> > 
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