DTM Slicing

See about Slicing in the SPRING

Digital Terrain Model Slicing:

  • make sure that a rectangular grid was generated for the desired information layer of the numerical category, otherwise the message "No grid was found in the active Information Layer !" will be presented when accessing the slicing function;
  • activate, in the "Control Panel", the IL which has the rectangular grid that will be used for the slicing;
  • click on DTM in the main menu and select Slicing... to open the associated window;
  • click on Output Category... and use the "Categories List" window to select the thematic category that will be used. By default only categories from the thematic model will be presented. After selecting the category click on Apply in this window. The selected category has to have thematic classes compatible to the slices (intervals) that will be generated, otherwise go back to File - Data Model... and define them;
  • give the Output IL name that will have the sliced thematic image;
  • click on Slice Definition... (see how to do it in the "Slices Definition" window);
  • returning to the "DTM Slicing" window click on Slices-Classes Association... to select the thematic class corresponding to each slicing interval (see how to proceed);
  • returning to the "DTM Slicing" window click on Apply to make the grid slicing.

NOTE: The sliced image (in the raster representation) will be available in the "Control Panel" after the processing. To visualize the thematic image just activate the generated IL above and select the Image representation to draw. It is possible to transform this thematic image into a vector format ( see format transformation).

The figure below shows a slicing example executed on a numerical grid with the distances values. The distances map generation ("buffer") requires a distances grid generation, which has to be sliced lately to produce a thematic map.

fatiamento1.gif - 17160 Bytes

 

See also:

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

Other DTM products in the SPRING