Terrain: Difference between revisions

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[[File:Api_current_situation_geography.png|thumb|right|400px|[[Building]] related to [[Function]], [[Address]]ess and [[Plot]]]]
[[File:Api_current_situation_geography.png|thumb|right|400px|[[Terrain]]s in relation to [[Terrain Type]]s and [[Height sector]]s.]]
[[File:QA wanner terrain building wiki3.jpg| link=https://www.tygron.com/nl/2020/04/17/wanneer-is-iets-een-terrain-in-tygron-en-wanneer-juist-een-building-en-waarom/]]<br>(In Dutch)
The composition of the surface (above-ground) and sub-surface (underground) in the [[Project]] is defined using Terrains. A Terrain has a polygons indicating its boundaries and a [[Terrain Type]] indicating its type. For every location in the project, two terrains will be present: one [[layer|surface layer]] Terrain and one [[layer|underground]] Terrain.  
 
Terrain is the description of the composition of the ground, both near the surface as well as deeper below.
 
==How is Terrain implemented in the {{software}}==
The Terrain in the [[Project]] is defined through polygons indicating the [[Terrain Type|type of Terrain]] present in any location. The Terrain data consists of two layers, a surface layer (above-ground) and a sub-surface layer (underground). For any given location on either layer, only one [[Terrain Type]] can be present. In other words every location has exactly one surface layer [[Terrain Type]] and one subsurface layer [[Terrain Type]].  


===Terrain Type===
===Terrain Type===
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===Terrain elevation===
===Terrain elevation===
{{main|Elevation model}}
{{main|Elevation model}}
Although conceptually related, the [[elevation model|height of the Terrain]] is explicitly not part of the Terrain itself or of the [[Terrain Type]]s. Instead, based on the presence or selection of specific [[Terrain Type]]s, modifications to the [[elevation model]] are made. For example, replacing a terrain with a type of [[water (Terrain Attribute)|water]] will cause a change for the [[elevation model]], but that change can be supressed.
Although conceptually related, the [[elevation model|height of the Terrain]] is explicitly not part of the Terrain itself or of the [[Terrain Type]]s. Instead, based on the presence or selection of specific [[Terrain Type]]s, modifications to the [[elevation model]] are made. For example, replacing a terrain with a type of [[water (Terrain Attribute)|water]] will cause a change for the [[elevation model]], but that change can be suppressed.


Terrains define what [[Terrain Type]] is present for any given location, and thus how the ground behaves. The [[elevation model]] defines the height of the ground for any given location.
Terrains define what [[Terrain Type]] is present for any given location, and thus how the ground behaves. The [[elevation model]] defines the height of the ground for any given location.


{{article end
{{article end
|notes=* When creating a new project, the default Terrains and their [[Terrain Type]]s are based on data from the [[Project_Sources#BRO|BRO]].
|notes=* When creating a new project in the Netherlands, the default Terrains and their [[Terrain Type]]s are based on data from the [[Project_Sources#BRO|BRO]].
* Terrains are never edited directly. Instead, users draw or import geometries for alternative Terrain Types.
|howtos=* [[How to manually change the Terrain]]
|howtos=* [[How to manually change the Terrain]]
* [[How to import a GeoJSON of waterways]]
* [[How to import a GeoTIFF of waterway depths]]
|seealso=* [[Terrain Type]]
|seealso=* [[Terrain Type]]
* [[Terrain Attributes]]
* [[Elevation model]]
* [[Elevation model]]
* [[Height map]]
* [[Underground Overlay]]
* [[Underground Overlay]]
}}
}}
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{{Template:Editor current situation nav}}
{{Template:Editor current situation nav}}


[[Category:Items]]
[[Category:Items]][[Category:Terrain]]

Latest revision as of 14:32, 29 February 2024

The composition of the surface (above-ground) and sub-surface (underground) in the Project is defined using Terrains. A Terrain has a polygons indicating its boundaries and a Terrain Type indicating its type. For every location in the project, two terrains will be present: one surface layer Terrain and one underground Terrain.

Terrain Type

Main article: Terrain Type

The Terrain polygons each have an associated Terrain Type, which holds the actual data of what the Terrain polygon represents. Only the Terrain Type holds any Attributes to define the Terrain's behavior.

Terrain elevation

Main article: Elevation model

Although conceptually related, the height of the Terrain is explicitly not part of the Terrain itself or of the Terrain Types. Instead, based on the presence or selection of specific Terrain Types, modifications to the elevation model are made. For example, replacing a terrain with a type of water will cause a change for the elevation model, but that change can be suppressed.

Terrains define what Terrain Type is present for any given location, and thus how the ground behaves. The elevation model defines the height of the ground for any given location.

Notes

  • When creating a new project in the Netherlands, the default Terrains and their Terrain Types are based on data from the BRO.
  • Terrains are never edited directly. Instead, users draw or import geometries for alternative Terrain Types.

How-to's

See also