CityGML: Difference between revisions

Content deleted Content added

Inline

Latest revision as of 04:19, 3 September 2024

Logo

CityGML is an open standardised data model and exchange format to store digital 3D models of cities and landscapes. It defines ways to describe most of the common 3D features and objects found in cities (such as buildings, roads, rivers, bridges, vegetation and city furniture) and the relationships between them. It also defines different standard levels of detail (LoDs) for the 3D objects, which allows the representation of objects for different applications and purposes, such as simulations, urban data mining, facility management, and thematic inquiries.

CityGML is implemented as a GML application schema for the Geography Markup Language 3 (GML3), the extendible international standard for spatial data exchange issued by the Open Geospatial Consortium (OGC) and the ISO TC211.

Implementations

In its most common implementation, which is the one generally used to disseminate and exchange data, CityGML datasets consist of a set of XML files and possibly some accompanying image files that are used as textures. Each text file can represent a part of the dataset, such as a specific region, a specific type of object (such as a set of roads), or a predefined LoD. The structure of a CityGML file is a hierarchy that ultimately reaches down to individual objects and their attributes. These objects have a geometry that is described using GML.

Another important implementation of CityGML is the one of 3D City DB, which stores CityGML in a database.^[1]

Version history

The OGC Members adopted version 1.0.0 of CityGML as an official OGC Standard in August 2008.^[2] In late 2011, the OGC Members approved version CityGML 2.0.0. CityGML 3.0 GML Encoding Specification is supposed to be published early 2019,^[3] while CityGML 3.0 Conceptual Model draft is already publicly available at the official Github repository.

References

^ "Home". 3dcitydb.net.
^ "OGC(R) Adopts CityGML Encoding Standard". OGC®. 19 August 2008. Archived from the original on 19 November 2008. Retrieved 27 September 2008.
^ "Archived CityGML 3.0 Development Repo". GitHub. 24 August 2021.

External links

CityGML standard page from the Open Geospatial Consortium
Official CityGML site
CityGML Wiki
Free Viewers/Tools for CityGML:
- azul
- Aristoteles
Commercial Viewers/Tools for CityGML:
- CityEditor (SketchUp Plugin)

[1] "Home". 3dcitydb.net.

[2] "OGC(R) Adopts CityGML Encoding Standard". OGC®. 19 August 2008. Archived from the original on 19 November 2008. Retrieved 27 September 2008.

[3] "Archived CityGML 3.0 Development Repo". GitHub. 24 August 2021.

[1]

[2]

[3]

@@ Line 1: / Line 1: @@
+[[File:CityGML-Logo.png|thumb|Logo]]
-'''CityGML''' is an open standardised [[data model]] and exchange format to store digital 3D models of [[3D city models|cities]] and [[Digital elevation model|landscapes]]. It defines ways to describe most of the common 3D features and objects found in cities (such as buildings, roads, rivers, bridges, vegetation and city furniture) and the relationships between them. It also defines different standard levels of detail (LoDs) for the 3D objects, which allows the representation of objects for different applications and purposes, such as simulations, urban data mining, facility management, and thematic inquiries.
+'''CityGML''' is an open standardised [[data model]] and exchange format to store digital [[3D city models|3D models of cities]] and [[Digital elevation model|landscapes]]. It defines ways to describe most of the common 3D features and objects found in cities (such as buildings, roads, rivers, bridges, vegetation and city furniture) and the relationships between them. It also defines different standard [[Level of detail (computer graphics)|levels of detail]] (LoDs) for the 3D objects, which allows the representation of objects for different applications and purposes, such as simulations, urban data mining, facility management, and thematic inquiries.
-CityGML is implemented as an [[GML application schema]] for the [[Geography Markup Language]] 3 (GML3), the extendible international standard for spatial data exchange issued by the [[Open Geospatial Consortium]] (OGC) and the ISO TC211.
+CityGML is implemented as a [[GML application schema]] for the [[Geography Markup Language]] 3 (GML3), the extendible international standard for spatial data exchange issued by the [[Open Geospatial Consortium]] (OGC) and the [[ISO TC211]].
 ==Implementations==
@@ Line 7: / Line 9: @@
 In its most common implementation, which is the one generally used to disseminate and exchange data, CityGML datasets consist of a set of [[XML]] files and possibly some accompanying image files that are used as textures. Each text file can represent a part of the dataset, such as a specific region, a specific type of object (such as a set of roads), or a predefined LoD. The structure of a CityGML file is a hierarchy that ultimately reaches down to individual objects and their attributes. These objects have a geometry that is described using GML.
-Another important implementation of CityGML is the one of 3D City DB, which stores CityGML in a database.<ref>http://www.3dcitydb.net</ref>
+Another important implementation of CityGML is the one of 3D City DB, which stores CityGML in a database.<ref>{{cite web |url=http://www.3dcitydb.net/ |title=Home |website=3dcitydb.net}}</ref>
 ==Version history==
-The OGC Members adopted version 1.0.0 of CityGML as an official OGC Standard in August 2008.<ref>[http://www.opengeospatial.org/pressroom/pressreleases/899 official OGC press release]</ref> In late 2011, the OGC Members approved version CityGML 2.0.0.
+The OGC Members adopted version 1.0.0 of CityGML as an official OGC Standard in August 2008.<ref>{{Cite web |date=19 August 2008 |title=OGC(R) Adopts CityGML Encoding Standard |url=http://www.opengeospatial.org/pressroom/pressreleases/899 |url-status=dead |archive-url=https://web.archive.org/web/20081119094900/http://www.opengeospatial.org/pressroom/pressreleases/899 |archive-date=19 November 2008 |access-date=27 September 2008 |website=OGC® |language=en}}</ref> In late 2011, the OGC Members approved version CityGML 2.0.0.
+CityGML 3.0 ''GML Encoding Specification'' is supposed to be published early 2019,<ref>{{Cite web|url=https://github.com/opengeospatial/CityGML-3.0|title=Archived CityGML 3.0 Development Repo|website=[[GitHub]]|date=24 August 2021}}</ref> while CityGML 3.0 ''Conceptual Model'' draft is already publicly available at the [https://github.com/opengeospatial/CityGML-3.0CM official Github repository].
 ==See also==
@@ Line 24: / Line 28: @@
 * [http://www.citygml.org Official CityGML site]
 * [http://www.citygmlwiki.org CityGML Wiki]
-* [https://www.citygml.guru CityGML.guru: unofficial CityGML site from the Delft University of Technology]
 * Free Viewers/Tools for CityGML:
 ** [https://github.com/tudelft3d/azul azul]
 ** [https://web.archive.org/web/20060828162448/http://www.ikg.uni-bonn.de/aristoteles Aristoteles]
+* Commercial Viewers/Tools for CityGML:
+** [https://www.3dis.de/cityeditor-citygml2cad CityEditor (SketchUp Plugin)]
-[[Category:GIS file formats]]
+[[Category:GIS vector file formats]]
 [[Category:XML-based standards]]
+[[Category:Vector graphics markup languages]]