[GRASS-user] GRASS modules for territorial analysis

[Benjamin Ducke]

You are right, r.quantile and r.statistics do all the things I need!

Thanks much,

Ben

Moritz Lennert wrote:
> On 14/05/09 10:03, Benjamin Ducke wrote:
>> Hi all,
>>
>> I am working on a set of GRASS for territorial analysis.
>>
>> Does anyone here know any GRASS modules/add-ons that do the following:
>>
>> 1. Sort all cells in an input raster map into n categories so
>> that each category contains (approximately) the same number of
>> cells; with no data range overlap between categories.
> 
> IIUC, you are speaking about quantiles. I guess it shouldn't be too hard 
> to extend r.quantile to print the number of cells in each quantile.
> 
>> 2. Given a CELL type raster MAP containing category IDs and any
>> number of additional raster maps B,C,.., count the number of cells
>> from B,C,.. for each category in A and report per-category statistics.
>> If B,C,.. are CELL type maps, then statistics need to include the set
>> of cell values for each category in A; if they are DCELL, then
>> range, avg, etc. are needed.
> 
> Doesn't r.statistics do just that ?
> 
> Moritz
> 


-- 
Benjamin Ducke
Senior Geospatial Consultant

Oxford Archaeology
Janus House
Osney Mead
OX2 0ES
Oxford, U.K.

Tel: +44 (0)1865 263 800 (switchboard)
Tel: +44 (0)1865 980 758 (direct)
Fax :+44 (0)1865 793 496
benjamin.ducke at oxfordarch.co.uk




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