Re: [Geoserver-users] How to offer a download data link through geoserver?
Hi Andrea, Darn, I should have done more research into WPS! Could have saved some time I think. gs:RectangularClip is probably just what I need, but running it out through OGR2OGR would be the ticket. As to WCS, there doesn't seem to be many examples of getting it to work right, maybe I'll try again. Thanks! Roger On Mon, Nov 1, 2010 at 5:30 PM, Andrea Aime andrea.a...@geo-solutions.itwrote: On Mon, Nov 1, 2010 at 3:28 PM, Roger Bedell sylvanasc...@gmail.com wrote: Hi Robert, For our project, we did this in a variety of ways, finally settling on using WFS with OGR for the vector data, and WMS for the raster. Unfortunately, to get everything we wanted, we had to do some custom programming. The WFS with the OGR output works extremely well, with the exception that vectors are not clipped at the boundaries of the requested feature, they just keep going. Here is a sample of a WFS request of this type, note that the output format is SHP, zipped, and projection is EPSG:2267. wfs:GetFeature service=WFS version=1.1.0 outputFormat=OGR-SHP-ZIP xmlns:ogi=http://204.62.18.181:8080/ogi; xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance; xsi:schemaLocation=http://www.opengis.net/wfs http://schemas.opengis.net/wfs/1.1.0/wfs.xsd; xmlns:ogc=http://www.opengis.net/ogc; xmlns:wfs=http://www.opengis.net/wfs; xmlns:gml=http://www.opengis.net/gml; wfs:Query typeName=ogi:sections srsName=urn:x-ogc:def:crs:EPSG:2267 ogc:Filter ogc:Intersects ogc:PropertyNamethe_geom/ogc:PropertyName gml:Polygon srsName=urn:x-ogc:def:crs:EPSG:4326 xmlns:gml=http://www.opengis.net/gml; gml:exterior gml:LinearRing gml:posList 36.129833547944 -97.739353179937 36.129833547944 -97.620220184329 36.188044089569 -97.620220184329 36.188044089569 -97.739353179937 36.129833547944 -97.739353179937/gml:posList /gml:LinearRing /gml:exterior /gml:Polygon /ogc:Intersects /ogc:Filter /wfs:Query /wfs:GetFeature I just got done adding a clip to bounding polygon output, but it is all done using PostGIS, as this is not available in WFS, more custom programming. Ah, this is clearly stepping out of WFS, WFS is a query service, cannot transform geometries. The good news is WPS can do rectangular clipping and it's pretty fast at it too. It does not have, however, an ogr2ogr output ability, thought with some (generic and reusable) programming it would be possible to get there. As to Raster, I tried using WCS, but even when I got it to work it was very slow, and I could never get the projection stuff to work. So, I went back to WMS, being very careful with pixel size etc, then piping it out through GDAL to get any projection output, more custom stuff! Pity. Slowness is probably due to WCS never using the overviews to get maximum accuracy. I think we changed that behavior lately and made it configurable, so on the 2.1.x series it should be possible to have a fast, even if less accurate, WCS. As for reprojection, hmmm... I guess there might be a bug at work. Would be nice to get a bug report with some sample requests and sample data Cheers Andrea - Ing. Andrea Aime Senior Software Engineer GeoSolutions S.A.S. Via Poggio alle Viti 1187 55054 Massarosa (LU) Italy phone: +39 0584962313 fax: +39 0584962313 http://www.geo-solutions.it http://geo-solutions.blogspot.com/ http://www.linkedin.com/in/andreaaime http://twitter.com/geowolf - -- Centralized Desktop Delivery: Dell and VMware Reference Architecture Simplifying enterprise desktop deployment and management using Dell EqualLogic storage and VMware View: A highly scalable, end-to-end client virtualization framework. Read more! http://p.sf.net/sfu/dell-eql-dev2dev___ Geoserver-users mailing list Geoserver-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geoserver-users
Re: [Geoserver-users] How to offer a download data link through geoserver?
On Sun, Nov 14, 2010 at 5:03 PM, Roger Bedell sylvanasc...@gmail.com wrote: Hi Andrea, Darn, I should have done more research into WPS! Could have saved some time I think. gs:RectangularClip is probably just what I need, but running it out through OGR2OGR would be the ticket. The current code can generate various formats as outputs, as zipped shapefile, geojson and GML. The output API is pluggable, so it is possible to write a output handler that uses ogr2ogr for WPS As to WCS, there doesn't seem to be many examples of getting it to work right, maybe I'll try again. Yeah, WCS is not exactly the most popular of the services Cheers Andrea - Ing. Andrea Aime Senior Software Engineer GeoSolutions S.A.S. Via Poggio alle Viti 1187 55054 Massarosa (LU) Italy phone: +39 0584962313 fax: +39 0584962313 http://www.geo-solutions.it http://geo-solutions.blogspot.com/ http://www.linkedin.com/in/andreaaime http://twitter.com/geowolf - -- Centralized Desktop Delivery: Dell and VMware Reference Architecture Simplifying enterprise desktop deployment and management using Dell EqualLogic storage and VMware View: A highly scalable, end-to-end client virtualization framework. Read more! http://p.sf.net/sfu/dell-eql-dev2dev ___ Geoserver-users mailing list Geoserver-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geoserver-users
Re: [Geoserver-users] How to offer a download data link through geoserver?
On Mon, Nov 1, 2010 at 8:14 AM, Robert Buckley robertdbuck...@yahoo.com wrote: Hi, as part of my project i would like to create a webpage offering metadata and the opportunity to download in different formats...kml,shp etc. Could anyone please give me some advice on how to do this? would it be a simple matter of applying this to an htmk link... http://ADDRESS:8080/geoserver/wms/FORMAT?layers=WORKSPACE:LAYER I´m a bit confused whether that should be wms or wfs in the link. WFS for GML, shapefile, geojson. Just use the GML link from the preview page, remove the maxFeatures element and change/set the outputFormat. WMS for KML instead: again, get the preview link for openlayers and change the mime type to the kml one (don't remember it by heart, but you can find it in the WMS capabilities document). Mind, big KML files will probably make Google Earth choke. If you want even more format options you can install ogr2ogr and configure the ogr2ogr output format (e.g., you can provide unstyled kml with full attributes inside, dxf, mapinfo, etc). Cheers Andrea - Ing. Andrea Aime Senior Software Engineer GeoSolutions S.A.S. Via Poggio alle Viti 1187 55054 Massarosa (LU) Italy phone: +39 0584962313 fax: +39 0584962313 http://www.geo-solutions.it http://geo-solutions.blogspot.com/ http://www.linkedin.com/in/andreaaime http://twitter.com/geowolf - -- Nokia and ATT present the 2010 Calling All Innovators-North America contest Create new apps games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Geoserver-users mailing list Geoserver-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geoserver-users
Re: [Geoserver-users] How to offer a download data link through geoserver?
On Mon, Nov 1, 2010 at 3:28 PM, Roger Bedell sylvanasc...@gmail.com wrote: Hi Robert, For our project, we did this in a variety of ways, finally settling on using WFS with OGR for the vector data, and WMS for the raster. Unfortunately, to get everything we wanted, we had to do some custom programming. The WFS with the OGR output works extremely well, with the exception that vectors are not clipped at the boundaries of the requested feature, they just keep going. Here is a sample of a WFS request of this type, note that the output format is SHP, zipped, and projection is EPSG:2267. wfs:GetFeature service=WFS version=1.1.0 outputFormat=OGR-SHP-ZIP xmlns:ogi=http://204.62.18.181:8080/ogi; xmlns:xsi=http://www.w3.org/2001/XMLSchema-instance; xsi:schemaLocation=http://www.opengis.net/wfs http://schemas.opengis.net/wfs/1.1.0/wfs.xsd; xmlns:ogc=http://www.opengis.net/ogc; xmlns:wfs=http://www.opengis.net/wfs; xmlns:gml=http://www.opengis.net/gml; wfs:Query typeName=ogi:sections srsName=urn:x-ogc:def:crs:EPSG:2267 ogc:Filter ogc:Intersects ogc:PropertyNamethe_geom/ogc:PropertyName gml:Polygon srsName=urn:x-ogc:def:crs:EPSG:4326 xmlns:gml=http://www.opengis.net/gml; gml:exterior gml:LinearRing gml:posList 36.129833547944 -97.739353179937 36.129833547944 -97.620220184329 36.188044089569 -97.620220184329 36.188044089569 -97.739353179937 36.129833547944 -97.739353179937/gml:posList /gml:LinearRing /gml:exterior /gml:Polygon /ogc:Intersects /ogc:Filter /wfs:Query /wfs:GetFeature I just got done adding a clip to bounding polygon output, but it is all done using PostGIS, as this is not available in WFS, more custom programming. Ah, this is clearly stepping out of WFS, WFS is a query service, cannot transform geometries. The good news is WPS can do rectangular clipping and it's pretty fast at it too. It does not have, however, an ogr2ogr output ability, thought with some (generic and reusable) programming it would be possible to get there. As to Raster, I tried using WCS, but even when I got it to work it was very slow, and I could never get the projection stuff to work. So, I went back to WMS, being very careful with pixel size etc, then piping it out through GDAL to get any projection output, more custom stuff! Pity. Slowness is probably due to WCS never using the overviews to get maximum accuracy. I think we changed that behavior lately and made it configurable, so on the 2.1.x series it should be possible to have a fast, even if less accurate, WCS. As for reprojection, hmmm... I guess there might be a bug at work. Would be nice to get a bug report with some sample requests and sample data Cheers Andrea - Ing. Andrea Aime Senior Software Engineer GeoSolutions S.A.S. Via Poggio alle Viti 1187 55054 Massarosa (LU) Italy phone: +39 0584962313 fax: +39 0584962313 http://www.geo-solutions.it http://geo-solutions.blogspot.com/ http://www.linkedin.com/in/andreaaime http://twitter.com/geowolf - -- Nokia and ATT present the 2010 Calling All Innovators-North America contest Create new apps games for the Nokia N8 for consumers in U.S. and Canada $10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store http://p.sf.net/sfu/nokia-dev2dev ___ Geoserver-users mailing list Geoserver-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geoserver-users
