[GRASSLIST:1466] GRID-one step ahead

[Uttam Kumar]

Hi GRASS users,
               I have laid the grids on my raster map by d.grid. I am facing 
two two problems. d.grid had parameters like:
             d.grid size=value [color=name] [origin=easting,northing]

1. What is the use of [origin=easting,northing]. Even if I mention a 
particular
   lat-long value (eg. 25,70), the grid overlays in the whole map 
irrespective of        the lat-long values mentioned by me and the same 
thing happens if I don't mention any value in the origin (i:e. the grid is 
overlayed in the whole map).

2. I want to calculate the number of pixels falling to a particular category 
say
   water,forest,agriculture etc. in each grid. How should I proceed to begin 
with
   a single grid and eventually covering all the grids in the area of 
interest.

   I would be thankful for all your suggestions.

    regards,
    uttam.

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