Re: [GRASS-user] How to calculate the area of a rastermap

[Carlos Guâno Grohmann]

r.surf.area?
r.stats?

Carlos



On Jan 14, 2008 5:47 AM, Philipp Steigenberger [EMAIL PROTECTED] wrote:

  Hi list,
  I know there is a posibility to calculate the area of a rastermap, but I
 cannot find the command.

  I have a water.outlet map. The area data range is 1 to 1

  Thankyou

  best wishes
  Philipp

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Re: [GRASS-user] How to calculate the area of a rastermap

[Martin Wegmann]

hello Philipp,

On Montag, 14. Januar 2008 08:47:15 Philipp Steigenberger wrote:
 Hi list,
 I know there is a posibility to calculate the area of a rastermap, but I
 cannot find the command.

Do you want to calculate the area of patches inside a rastermap or the extent 
of a raster?

for the first you have to use v.* commands 

r.to.vect input= output=out feature=area
v.db.addcol map=out layer=1 'columns=area double' 
v.to.db map=out type=point,line,boundary,centroid layer=1 qlayer=1 option=area 
units=meters column=area 
v.to.rast out output=out_area use=attr col=area --o

for the second r.info or g.region would do it.

Martin



 I have a water.outlet map. The area data range is 1 to 1

 Thankyou

 best wishes
 Philipp


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Re: [GRASS-user] How to calculate the area of a rastermap

[Hamish]

Philipp Steigenberger wrote:
   I know there is a posibility to calculate the area of a rastermap,
  but I cannot find the command.
 
   I have a water.outlet map. The area data range is 1 to 1

Carlos wrote:
 r.surf.area?
 r.stats?

'r.report units=h' too


Hamish



  

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