A project we are starting up is considering to visualizing AIXM format in cesium and I wanted to check if someone has done work on this before.
THe AIXM format is similar to gml and it has a lot of 3d information about surfaces, buildings and obstacles related to Aerodrome Management. The description from http://www.ogcnetwork.net/node/222 is also good:
The Aeronautical Information Exchange Model (AIXM) is designed to enable the management and distribution of Aeronautical Information Services (AIS) data in digital format.
AIXM 5 takes advantages of existing and emerging information engineering standards and supports current and future aeronautical information system requirements. The major tenets are:
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An exhaustive temporality model, including support for the temporary information contained in NOTAM
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Alignment with ISO standards for geospatial information, including the use of the Geography Markup Language (GML) 3.2.
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Modularity and extensibility to support current and future aeronautical information messaging requirements and additional data attributing requirements
More information can be found on the AIXM web page, which includes introduction to AIXM 5 and its key concepts, links to the UML and XML schema documents, and forums for sharing how the community is using AIXM 5.