# Arbitrary Polygon \[SPIG]

## Surface

**Bridge:** Bridge to which the polygon is referenced. Optional; when unset the polygon uses the project's primary bridge.

**Reference Point Station:** Station along the PGL used as the reference point for polygon coordinates.

**Reference Point Transverse Offset:** Transverse offset (from the PGL) of the polygon reference point.

**Surface Points \[in]:**

**Rotation \[deg]:**

## Graphics

**Reference Elevation \[ft]:**

**Elevation Coordinate System:**


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