[OSGeo-Discuss] Creating Value from Raster Data
I'm working on a magazine article for ACSM Bulliten entitled Creating Value From Raster Data. The target audience will be land surveyors. I was hoping some of the OSGeo guys would be able to help me with a few questions as I do my research for the article: - Are there any open source alternatives to automated feature creation from raster data, such as is possible with ENVI (http://www.ittvis.com/ProductServices/ENVI.aspx) ? - Does anyone know of research or work being done with the development of open source algorithms and programming libraries to enable automated feature creation from raster data? - Can you think of ways to create value from raster data other than extraction of vector features? Thanks for any suggestions and information. Landon Warning: Information provided via electronic media is not guaranteed against defects including translation and transmission errors. If the reader is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this information in error, please notify the sender immediately.___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] Creating Value from Raster Data
Hi Landon, - Does anyone know of research or work being done with the development of open source algorithms and programming libraries to enable automated feature creation from raster data? Does it means to produce a polygon feature layer from a raster? GDAL has this function - gdal_polygonize http://www.gdal.org/gdal_polygonize.html GDAL raster functions are all ported in QGIS as a plugin (i.e Raster) in QGIS. Download QGIS 1.6.0 and have a look at the Raster. QGIS supports vector, raster, database, etc. http://www.qgis.org/wiki/Download GdalTools plugin - (Raster) https://trac.faunalia.it/GdalTools-plugin/ Noli On 1/5/11, Landon Blake lbl...@ksninc.com wrote: I'm working on a magazine article for ACSM Bulliten entitled Creating Value From Raster Data. The target audience will be land surveyors. I was hoping some of the OSGeo guys would be able to help me with a few questions as I do my research for the article: - Are there any open source alternatives to automated feature creation from raster data, such as is possible with ENVI (http://www.ittvis.com/ProductServices/ENVI.aspx) ? - Does anyone know of research or work being done with the development of open source algorithms and programming libraries to enable automated feature creation from raster data? - Can you think of ways to create value from raster data other than extraction of vector features? Thanks for any suggestions and information. Landon Warning: Information provided via electronic media is not guaranteed against defects including translation and transmission errors. If the reader is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this information in error, please notify the sender immediately. ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] Creating Value from Raster Data
One might argue that slippy maps and tile caches have added a lot of value to raster data or at least demand. But more directly on the topic in addition to GDAL. GRASS http://www.perrygeo.net/wordpress/?p=104 See pg 115+ from Open Source GIS A GRASS Approach (Neteler, Mitasova) More generically aside from extraction, there's combinatorial calculation: Calculation of NDVI for vegetation analysis (NIR and Red bands) Looking for fires in MODIS data (Thermal band math) Watershed flows from DEMs Solar radiation analysis (Think solar panel placement) etc. Specifically it sounds like you're talking about Unsupervised/Supervised classification A lot of these can be done with any RASTER based analysis application. So SAGA has some tools, and I can't quite remember but INPE in Brazil was working on some FOSS Image classification software too. Thanks, Alex On 01/04/2011 03:52 PM, Landon Blake wrote: I'm working on a magazine article for ACSM Bulliten entitled Creating Value From Raster Data. The target audience will be land surveyors. I was hoping some of the OSGeo guys would be able to help me with a few questions as I do my research for the article: - Are there any open source alternatives to automated feature creation from raster data, such as is possible with ENVI (http://www.ittvis.com/ProductServices/ENVI.aspx) ? - Does anyone know of research or work being done with the development of open source algorithms and programming libraries to enable automated feature creation from raster data? - Can you think of ways to create value from raster data other than extraction of vector features? Thanks for any suggestions and information. Landon ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] Creating Value from Raster Data
Just to add what Alex mentioned already, here a link for GRASS Image classification (how to). http://grass.osgeo.org/wiki/Image_classification In reference to these works, * Micha Silver: Analyzing acacia tree health in the Arava with GRASS GIS * Perrygeo: Impervious surface deliniation with GRASS * Dylan Beaudette: Working with Landsat Data * Dylan Beaudette: Canopy Quantification via Image Classification Noli On 1/5/11, Alex Mandel tech_...@wildintellect.com wrote: One might argue that slippy maps and tile caches have added a lot of value to raster data or at least demand. But more directly on the topic in addition to GDAL. GRASS http://www.perrygeo.net/wordpress/?p=104 See pg 115+ from Open Source GIS A GRASS Approach (Neteler, Mitasova) More generically aside from extraction, there's combinatorial calculation: Calculation of NDVI for vegetation analysis (NIR and Red bands) Looking for fires in MODIS data (Thermal band math) Watershed flows from DEMs Solar radiation analysis (Think solar panel placement) etc. Specifically it sounds like you're talking about Unsupervised/Supervised classification A lot of these can be done with any RASTER based analysis application. So SAGA has some tools, and I can't quite remember but INPE in Brazil was working on some FOSS Image classification software too. Thanks, Alex On 01/04/2011 03:52 PM, Landon Blake wrote: I'm working on a magazine article for ACSM Bulliten entitled Creating Value From Raster Data. The target audience will be land surveyors. I was hoping some of the OSGeo guys would be able to help me with a few questions as I do my research for the article: - Are there any open source alternatives to automated feature creation from raster data, such as is possible with ENVI (http://www.ittvis.com/ProductServices/ENVI.aspx) ? - Does anyone know of research or work being done with the development of open source algorithms and programming libraries to enable automated feature creation from raster data? - Can you think of ways to create value from raster data other than extraction of vector features? Thanks for any suggestions and information. Landon ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
Re: [OSGeo-Discuss] Creating Value from Raster Data
Il giorno mer, 05/01/2011 alle 14.14 +1100, Noli Sicad ha scritto: Just to add what Alex mentioned already, here a link for GRASS Image classification (how to). http://grass.osgeo.org/wiki/Image_classification Also, have a look to Orfeo ToolBox (OTB), who also has a QGIS plugin, unfortunately not (yet?) on main QGIS (requires external installation, may not be easy). http://orfeo-toolbox.org http://wiki.orfeo-toolbox.org/index.php/Quantum_GIS_plugins I would vote for its inclusion on trunk, however. All the best. -- http://www.faunalia.it/pc ___ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
