SequentialGrid: Difference between revisions

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-'''Q:''' How to generate a grid with sequential numbers?
-'''A:'''
-In a shell, first get number of rows and columns as environment variables:
- eval `g.region -g`
-(or just note the output of g.region -p and insert the relevant value at the appropriate place in the formulas below)
-Then use the variable 'rows' or 'cols' as follows:
- r.mapcalc "grid_seq = col() * $rows + row() - $rows"
-gives you a "vertical" sequence.
- r.mapcalc "grid_seq = row() * $cols + col() - $cols"
-gives you a "horizontal" sequence.
-[[Category:FAQ]]

Revision as of 13:10, 18 September 2012