Polygon Data Fields (SWMM)

Polygon data can be edited on the Polygons Grid Window of the Polygons Grid or the Polygon Property Sheet.

The following table describes all the data required to define a polygon.

Fields that are common to the majority of objects can be found in the Common Fields topic.

Polygon Data

Database Table Name: sw_polygon

Field Name	Help Text	Database Field	Data Type	Size	Units	Precision
ID	The unique name of the polygon.	polygon_id	Text	254		0
Category	A polygon may be associated with a polygon category. Polygon categories can be used to group sets of polygons in the network. They can be used to: Identify a set of polygons on the GeoPlan Window by use of a polygon theme on the Category ID field Identify polygons to be used as voids when creating a mesh for 2D modelling	category_id	Text	254		0
Area	Polygon area. Default value calculated from polygon geometry.	area	Double		CA	3

Field Name

Help Text

Database Field

Size

Precision

Default

Error Lower Limit

Error Upper Limit

Warning Lower Limit

Warning Upper Limit

The unique name of the polygon.

polygon_id

Text

254