[TZGISUG] Raster analysis in QGIS

[Aloyce Mpinge]

Any QGIS training going on, am interested
Aloyce





On Friday, February 21, 2014 1:06 PM, "cutlan at yahoo.com" <cutlan at yahoo.com> wrote:
 
hi,
what is the spatial resolution and coordinate system of the data. 
also more about float point (decimals).


Sent from Yahoo Mail on Android 



________________________________
 From:  Steve Ball <steve.ball at mpingoconservation.org>; 
To:  Tanzania GIS Users Group Discussion <tzgisug at mail.habari.co.tz>; 
Subject:  [TZGISUG] Raster analysis in QGIS 
Sent:  Thu, Feb 20, 2014 4:55:12 PM 


Howdy folks,

Not sure this group is the best forum to ask this question, but I
      thought I'd give it a go. I have a raster of biomass values
      (derived from RADAR data, the values are in floating point format
      if that matters). I need to stratify that into 5t/ha bands, i.e.
      where the value ranges from 0 to 5, then 5 to 10 etc. Displaying
      the raster visually in these terms is easy enough, but actually
      converting the data into this form appears much harder. Then I
      would like to be able to check the distribution of vector point
      data across those strata (ought to be straightforward), and also
      to compute the total area of each such stratum (not yet sure how I
      do this). It would be nice, not least for future replicability, to
      accomplish this all in QGIS without resorting to ArcView.

Any pointers on relevant instructions on the interwebs most
      appreciated, since am struggling to guess the appropriate search
      terms. Can the Sextante plugin help?

cheers, Steve

ps. Am currently using QGIS 1.8 but could switch to 2.0.1 if that
      would do the trick.
________________________________________________
Steve Ball
Chief Technical Adviser
Mpingo Conservation & Development Initiative
www.mpingoconservation.org    


  

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