Create an Overlay Property

SIS Notice Board uses SWD overlay Properties in different scenarios (for instance: using the overlay in certain services or defining parameters to use in a Local Knowledge query).

In Cadcorp SIS Desktop, right-click on the overlay in the tree view and select Properties:

Select Properties again and click Add to add a new property:

Note: See also CadcorpSIS Desktop Properties

All available properties are defined below:

WML::Knowledge_Type$

Defines which type of Local Knowledge query the overlay will use.

  • Area
  • Statistic
  • NearestN
  • Distance

WML::Knowledge_AdditionalInfo$

Runs an iif query on the result of a Local Knowledge Statistic query.

WML::Knowledge_SearchDistance#

Used in a Local Knowledge Distance query to define a search radius.

WML::Knowledge_Expression$

Used in a Local Knowledge Statistic query to define the overlay column on which the expression will be executed.

WML::Knowledge_Operation$

Sets the mathematical operation to be carried out for a Local Knowledge Statistic query.

WML::Knowledge_Test$

Used in a Local Knowledge Statistic query to define the spatial relationship between the data and the search area for the resultant statistic.

WML::Knowledge_Filter$

Used to filter the results of a Local Knowledge Query.

WML::Knowledge_nItems&

Used in a Local Knowledge NearestN query to define the number of items you want to return.