[GRASS5] changing resolution - who decides

[Andrea Antonello]

Please let me show you some tests on very small rasters and resolution 
changes:

case 1:

resolution 500:
10 15 20 25
30 35 40 45 
50 55 60 65

changing resolution to 1000 results in:
15 25 
55 65

and real resolution ew=1000 and ns=750

the kept points are the upper right of a four group


case 2:

resolution 500:
10 15 20
30 35 40
50 55 60

changing resolution to 1000 results in:
10 20 
50 60

and real resolution ew=750 and ns=750

the choosen points are the ones in the corners of the whole thing


Who decides the values of the new resolutions, the number of cells to use and 
the values of the map to keep?

Cheers
Andrea

-- 
____________________________________________________________________________

University of Trento
Department of Civil and Environmental Engineering
Via Mesiano, 77 - Trento (ITALY)

Andrea Antonello
tel:  +393288497722
fax:  +390461882672
____________________________________________________________________________