[OSGeo-Discuss] Creating Value from Raster Data

[Noli Sicad]

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_dev at 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
>>
>
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