3D city models
Encyclopedia
3D city models are digital representations of the Earth’s surface and related objects belonging to urban areas (like cities, factories, buildings etc.). The modeling language for 3D city models is for example CityGML
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CityGML
CityGML is a common information model for the representation of sets of 3D urban objects. It defines the classes and relations for the most relevant topographic objects in cities and regional models with respect to their geometrical, topological, semantical and appearance properties...
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Applications
In recent years 3D city models have been used for many applications:- to visualize the cities for various purposes (e.g. tourism, virtual tours),
- for urban planningUrban planningUrban planning incorporates areas such as economics, design, ecology, sociology, geography, law, political science, and statistics to guide and ensure the orderly development of settlements and communities....
, - in navigation systemNavigation systemA navigation system is a system that aids is navigation. Navigation systems may be entirely on board a vehicle or vessel, or they may be located elsewhere and communicate via radio or other signals with a vehicle or vessel, or they may use a combination of these methods.Navigation systems may be...
s, - in intelligent transportation systems,
- for noiseNoiseIn common use, the word noise means any unwanted sound. In both analog and digital electronics, noise is random unwanted perturbation to a wanted signal; it is called noise as a generalisation of the acoustic noise heard when listening to a weak radio transmission with significant electrical noise...
modeling, - large area thermographic inspectionThermographic inspectionThermographic inspection refers to the nondestructive testing of parts, materials or systems through the imaging of the thermal patterns at the object's surface. Strictly speaking, the term thermography alone, refers to all thermographic inspection techniques regardless of the physical phenomena...
s of buildings (see also IR thermographyThermographyInfrared thermography, thermal imaging, and thermal video are examples of infrared imaging science. Thermal imaging cameras detect radiation in the infrared range of the electromagnetic spectrum and produce images of that radiation, called thermograms...
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