Executing Clean Vectors:

  • load the IL in the "Control Panel" that contains the lines to be cleaned and adjusted;
  • select "Delete Double Fragments" to eliminate lines (arcs) that have duplicated segments with exact superposition of the segments.
  • select "Delete lines less than " to eliminate lines (arcs) that have a length less than the value (in meters) specified by the user.
  • select " Delete polygons less than " <Not Implemented> to eliminate polygons formed by islands (one arc only) or by many arcs, that have areas smaller than the value (in square meters) specified by the user.
  • select "Automatic Topology" and fill out the " Adjustment Factor" (in meters) to perform the automatic adjustment of every node, including the elimination of duplicated fragments (even if the points do not coincide), the elimination of lines and polygons smaller than the Adjustment Factor (in meters) provided by the user. See more detail in the use of automatic topology during digitizing.
  • click on Apply to conclude the operation.

ATTENTION: The execution of Clear Vectors is directly imposed on the active IL. If you want to verify the results of this processing it is recommended that you make a previous copy of the IL (create a new IL and use the mosaic to copy).

Clean Vectors: Concepts

This tool allows the elimination and adjustment of lines as a function of the parameters selected in the window, thus they could be applied to any IL that has lines in its representation, like thematic, numeric cadastral and network maps. See below these parameters:

  • Delete Double Fragments: The duplicated segment does not need to have exactly the same number of points on each line. The figure below shows two arcs (1 and 2), where arc 2 has one more point than arc 1, but graphically the lines are superposed. After processing, one of the segments will be eliminated and the other will be preserved, thus creating three arcs. In order to break arc 1 in three it is necessary to also use the  Automatic Topology.

  • Delete lines less than: The figure below shows five arcs (1 to 5) where arc 3 is eliminated because it has a length greater than specified. However, the gap created will not be adjusted, unless the Automatic Topology is activated.

  • Delete polygons less than: The figure below shows three polygons (1, 2, and 3) where 1 is eliminated because it is an island smaller than the value specified, while 3 will also be eliminated, but only one of the two arcs that define itself will be deleted, thus increasing or decreasing the final area of polygon 2.

 

NOTE: In the case of a numeric IL, this parameter will have no effect on the data.

See also :

Vector Edition