Point-based building (Water Overlay)

Point based buildings are constructions for which their geometry is interpreted as a single point.

Examples of point based buildings are the following hydraulic structures:

Icon	Name	Name
	Inlet	Conditional flow from external area to inlet location.
	Sewer overflow	Conditional flow from sewer to waterway, based on sewer overflow height.

Center point

One way to obtain a point from a geometry is by calculating its geometric center. The method used by Tygron Platform is similar to [1]. See the following examples:

• 

  Simple square polygon.

• 

  Simple circular polygon.

• 

  Road polygon.

This method may have limitations depending on the complexity of the geometry. See the following two cases:

• 

  Case one: Buffered multi-line polygon.

• 

  Case two: Multi polygon.

In case one, the building's geometry is a complex polygon. Its centroid lies outside its geometry.
In case two, the building's geometry is a multi-polygon. Its centroid is in between the two rectangle polygons.
Generally, these kind of polygons are undesirable for a point-based building.

General advice

• The point-based buildings should be supplied as simple rectangle or circular polygons.
• The geometry should consist of only one polygon. In the case of buildings, use only one section.

See also

• Line-based building (Water Overlay)
• Area-based building (Water Overlay)
• https://en.wikipedia.org/wiki/Centroid

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Water Module

Water Module

Tutorials

Overview

Theory

Benchmarks

Group

Hydraulic structures

Inlet

Inlet q • Inlet area • Inlet capacity •  Lower threshold •  Upper threshold • Inlet underground

Pump

Pump q •  Lower threshold •  Upper threshold • Pump angle • Pump capacity • Pump area

Culvert

Culvert diameter • Culvert rectangular height • Culvert threshold • Culvert n

Weir

Weir height • Weir width • Weir angle • Weir coefficient • Weir n • Weir target level

Sewer overflow

Sewer overflow • Sewer overflow speed

Drainage

Drainage q • Drainage datum • Drainage active • Drainage overflow threshold

Output

Object flow output • Object height output • Object datum output a • Object datum output b • Object water area output • Object width output • Weir dam output

Related

Building attributes • Hydrological features •  Terrain attributes • Model attributes • Results • Simulation data