Rudolf@tygron.nl at 12:44, 25 February 2026

2026-02-25T12:44:45Z

← Older revision		Revision as of 12:44, 25 February 2026
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	*The geometry should consist of only one polygon. In the case of buildings, use only one [[section]].		*The geometry should consist of only one polygon. In the case of buildings, use only one [[section]].

	~~==See also=~~=		{{article end
	* https://en.wikipedia.org/wiki/Centroid~~\|Centroid~~		\|seealso=
			* https://en.wikipedia.org/wiki/Centroid
			}}

	{{Water Module buttons}}		{{Water Module buttons}}

Maxim@tygron.com: /* Center point */

2022-10-05T09:37:51Z

Center point

← Older revision		Revision as of 09:37, 5 October 2022
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	<li style="display: inline-block;">[[File:centroid5.png\|thumb\|x150px\|top\|left\|Case two: Multi polygon.]]</li>		<li style="display: inline-block;">[[File:centroid5.png\|thumb\|x150px\|top\|left\|Case two: Multi polygon.]]</li>
	</ul></div>		</ul></div>
	In case one, the ~~construction~~'s geometry is a complex polygon. Its centroid lies outside its geometry.<br>		In case one, the building's geometry is a complex polygon. Its centroid lies outside its geometry.<br>
	In case two, the ~~construction~~'s geometry is a multi-polygon. Its centroid is in between the two rectangle polygons.<br>		In case two, the building's geometry is a multi-polygon. Its centroid is in between the two rectangle polygons.<br>
	Generally, these kind of polygons are undesirable for a point-based building.		Generally, these kind of polygons are undesirable for a point-based building.

Maxim@tygron.com: Created page with "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: {| {{STDT|overlay sortable}} |- ! style="width:50px" | Icon !! style="width:100px; text-align:left;" | Name !! style="text-align:left;" | Name |- |style="text-align:center;"|50px |Inlet |Conditional flow from external area t..."

2022-10-05T09:37:32Z

Created page with "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: {| {{STDT|overlay sortable}} |- ! style="width:50px" | Icon !! style="width:100px; text-align:left;" | Name !! style="text-align:left;" | Name |- |style="text-align:center;"|50px |Inlet |Conditional flow from external area t..."

New page

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

Examples of point based buildings are the following hydraulic structures:

{| {{STDT|overlay sortable}}
|-
! style="width:50px" | Icon !! style="width:100px; text-align:left;" | Name !! style="text-align:left;" | Name
|-
|style="text-align:center;"|[[File:Waterwizard_icon_inlet.png|50px]]
|[[Inlet (Water Overlay)|Inlet]]
|Conditional flow from external area to inlet location.
|-
|style="text-align:center;"|[[File:Waterwizard_icon_sewer_overflow.png|50px]]
|[[Sewer overflow (Water Overlay)|Sewer overflow]]
|Conditional flow from sewer to waterway, based on sewer overflow height.
|}

==Center point==
A method to obtain a point from a geometry is to calculate the geometric center point of a geometry. The method used by {{software}} is similar to [https://en.wikipedia.org/wiki/Centroid|Centroid].
See the following examples:
<div><ul>
<li style="display: inline-block;">[[File:centroid1.png|thumb|left|x150px|Simple square polygon.]]</li>
<li style="display: inline-block;">[[File:centroid2.png|thumb|left|x150px|Simple circular polygon.]]</li>
<li style="display: inline-block;">[[File:centroid3.png|thumb|left|x150px|Road polygon.]]</li>
</ul></div>

<br style='clear:left;'>
The method above is simple, but not robust in all cases. See the following two cases:

<div><ul>
<li style="display: inline-block;">[[File:centroid4.png|thumb|x150px|top|left|Case one: Buffered multi-line polygon.]]</li>
<li style="display: inline-block;">[[File:centroid5.png|thumb|x150px|top|left|Case two: Multi polygon.]]</li>
</ul></div>
In case one, the construction's geometry is a complex polygon. Its centroid lies outside its geometry.<br>
In case two, the construction's geometry is a multi-polygon. Its centroid is in between the two rectangle polygons.<br>
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==
* https://en.wikipedia.org/wiki/Centroid|Centroid

{{Water Module buttons}}

Point-based building (Water Overlay) - Revision history

Rudolf@tygron.nl at 12:44, 25 February 2026

Maxim@tygron.com: /* Center point */