Computing the Hydrological Grid
This interface is used to compute the hydrological grid. Two grids are generated:
- flow directions grid (Local Drain Direction LDD), which stores in each cell
the flow direction from this cell and,
- accumulated flows grid (ACM), which stores in each cell information about the
number of cells a flow has passed up to that cell.
The input IL name, by default, is the same as the active IL name, however, this
name can be changed. To the chosen name it will be added the "_LDD" prefix to the LDD grid,
and the "_ACM" prefix to the accumulated flows grid.
Computing the hydrological grids:
- activate in the "Control Panel" the numerical information layer that has the
altimetric grid
- click on DTM in the main menu and select Hydrological Processes - Grid Generation ...
to open an associated window;
- click on Output Category... to select the category for the IL that will be
created. The " Categories" window is presented.
Once the category is selected, click on Apply in this window;
- give the Output IL name if a name different then the active IL name is desired;
- set the number of bits for the Output grid, the user can choose between 32 or 64 bits;
- click on Apply to generate the LDD and ACM grids.
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