Topic:
How is grid rotation defined?

Description:
        

Solution:
Grid rotation is measured as positive in the counter-clockwise direction. 

What will be the column spacing/row spacing in a rotated grid?

For example, create a grid with row spacing of 1000, and column spacing of 2500.
  
Unrotated grid => the spacing in the x direction will be 2500 ft.
  Rotated 20 degrees => grid nodes on WSW - ENE line will be 2500 ft.
  Rotated 70 degrees => grid nodes on SSW - NNE line will be 2500 ft.
  ie. the rows and columns are rotated with the same angle.

The nodes might be distributed something like this when posted in basemap:

                                          x
                                x
                      x
             x                             x
                                 x
                       x
              x
Such a grid would be useful when attempting to model a feature striking ENE.
See Also: FAQ: Why create a rotated grid?



Last Modified on: 06-OCT-00