Thematic Classes Identification

After vectors editing, the digitalized points, lines and polygons, have to be associated to a thematic class in the Database so they will have presentation properties, such as color and filling, according to patterns previously defined.

In this step a polygon becomes, for instance, a soil spot "Dusky-Red latosol", for a soil map. As a soil spot it will be represented by the color defined for this class in the Database.

In order to perform this operation, check that the thematic classes created in the Data Model in the Database are coherent with the data being edited, and if the visual for the classes were correctly defined.


Editing thematic classes:

  • select in the "Control Panel" the thematic IL desired and the Lines, Points and Classes representations;
  • click on Execute - Draw or in the active window to visualize the IL to be edited;
  • click on Thematic - Vector Editing.. or Vector - Editing... in the main menu, to show the "Topology Editor" window;
  • click on Classes.... The"Thematic Classes Editor " window is presented;
  • in Current Category the category that has the IL being edited is presented;
  • select in the Classes list the class to be associated to the entity (point, line, or polygon);
  • the visual of the selected class (current) is presented on the side. If the user wants to change it, just click on the "Visual" button;
  • select the Operation Associate button, to associate the entity (point, line, or polygon) to a class. In case the entity is already associated to another class answer YES or NO to change by the other, or Dissociate to remove the association;
  • click on Apply to All, to classify all entities that do not have a class with the active class (current); or even, if desired, dissociate all the entities of the current class;
  • select the entity type with the mouse left button which is associated or dissociated: Point, Line or Polygon. Proceed in the same way to other entities;
  • click on Close after finishing the polygons association/dissociation.

NOTE: The points, lines or polygons association/dissociation can be performed also using the digitizing table, it just required that the table is calibrated. To change the class being identified the command control has to be returned to the mouse when the table cursor is active (click on the table Button 4).


Thematic Classes Presentation


After finishing the edition and identification of the geographical entities in the thematic map, it will be available for other types of processing, such as computations, measurements, crossings, or its visualization. See how at presenting the thematic IL classes and also the IL's legend that are active in the window.


NOTE: After editing classes, notice that the Classes representation is available in the "Control Panel".



Thematic/Cadastral Maps in SPRING


See also:
Vector and Raster Representation
How to execute Vector to Raster transformation?