Generation of Slopes or Aspect Maps

See about Slope/Aspect in the SPRING

Generation of Slopes or Aspect Maps:

  • one has to be sure that the rectangular grid or triangular grid was generated from the appropriate altimetric information layer.
  • activate in the "Control Panel" the Information Layer which has a rectangular grid or triangular grid which will be used for the Slope computation or Aspect;
  • click on DTM in the main menu and select Slope... ;
  • in the Input - select between Grid or TIN. Notice that only the representation associated to the active IL will be enable;
  • in the Output - select between Slope or Aspect as desired;
  • in Unity - (only for the Slope option) select the output for the Slope grid values: Degrees or Percentage;
  • click on Output Category... and use the "Categories List" dialog box to select what numerical category will be used. By default only the numerical model categories will be presented. After selecting the category click on Apply in this window;
  • give the Output Layer name that will be created;
  • click on Bounding Box... to generate the output grid for a geographical area smaller than the project area. This option is not required, and should be used only if both area values are required;
  • give the grid Resolution for X(m) and Y(m) in meters;
  • set number of bits for the Output grid, the user can choose between 32 or 64 bits;
  • click on Apply to generate the Slope/Aspect.

Once the Slope grid or Aspect is created, one has to make its slicing to get a thematic map representing the Slope/Aspect intervals as desired ( learn more about the slicing operation).

 

See also:

How to generate a Rectangular grid
How to generate a Triangular grid

Other DTM products in the SPRING