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ET GeoWizards Scripting

Eliminate

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Eliminates unwanted polygons (slivers) by merging them into the neighboring polygons or deleting them. Eliminate2 method added in ET GeoWizards 9.8.

Syntax    

Dim ET As  New ETGW_Core
Set variable =  ET.Eliminate(pInFeatureClass, sOutFileName, _
                         sSelMethod, dThickness, sElimMethod, sWhereClause, sMessage)

Set variable =  ET.Eliminate2(pInFeatureClass, sOutFileName, _
                         sSelMethod, dThickness, sElimMethod, sWhereClause, sIDField, sMessage)

The Eliminate method syntax has the following object qualifier and arguments:

Part Description
variable An IFeatureClass object
pInFeatureClass Required. An IFeatureClass object (Must be a Polygon feature class)
sOutFileName Required. A String - the full name of the output feature class (A feature class with the same full name should not exist)
sSelMethod Required. A String - the method to be used for selection of the polygons to be eliminated. The values can be:
  • "Attrib" - an attribute query will be used
  • "Thickness" - the thickness ratio will be used for selection. The thickness  is expressed as a ratio of the polygon area versus the area of its minimal bounding square. The ratio will have value of 1 for a square. The smaller the value is, the thinner the polygon is.
  • "Circularity" - the thickness ratio will be used for selection. For a circle the circularity will be 1. The thinner the polygon is the smaller the circularity will be.

Note - The values are case sensitive
dThickness Required. A Double representing the value of the ratio to be used. If the selection method is "Thickness" this is the Thickness ratio, if "Circularity" - this is the Circularity ratio. If "Attrib" selection method is specified this value is ignored 
sElimMethod Required. A String  representing the elimination method to be used. The values can be:
  • "Delete" - The  selected polygons will be deleted
  • "Largest" - The polygons will be eliminated by joining them to the neighboring polygons  that have the largest area
  • "Longest" - The polygons will be eliminated by joining them to the neighboring polygons with the longest common border .
  • "Join Field" - The polygons will be eliminated by joining them to the neighboring polygons with the same value in the selected field as the sliver polygons. Applies to Eliminate2 method only

Note - The values are case sensitive
sWhereClause Required. A String - the Where Clause that will be used if sSelMethod = "Attrib", ignored if any of the other selection methods is used.

Note - Must be a valid Where Clause
sIDField Optional. A String representing the name of the field to be used with the "Join Field" option. Applies to Eliminate2 method only
sMessage Optional. In a case of failure -  description of the cause. If the functions completes with success an empty string will be returned. 

Example