关键词: 航空情报, GML, 映射, 航空地理数据模型

Abstract: Aeronautical information is an important type of geospatial data to ensure the safety and efficiency for air traffic.Currently,aeronautical information service(AIS) provide these data to users by the medium of aeronautical chart,aeronautical information public(AIP),notice to airman(NOTA M),and so on.We are in the age of the Internet,satellite navigation and computer networks,yet our approach to aeronautical geospatial data distribution is still based on paper charts,paper documentation and telex-based text messages.Systems exist in isolation.Many of the data is entered more than twice in different computers using a keyboard rather than via file transfer or database transactions. To satisfy new requirements for the Global Air Traffic Management Operational Concept,aeronautical information services should be transferred to support a digital,real-time,accredited and secure aeronautical information environment.As an open geospatial data standard,GML gives aeronautical information feature coding method and interchanging format.Much has been done in air traffic community,and the technology has become more mature and is widely used.EUROCONTROL and FAA have developed AIXM(Aeronautical Information Exchange Model) based on GML.In Europe,the European AIS Database(EAD) provide unique reference database of aeronautical information on behalf of AIXM. In Chinese air traffic community,unique aeronautical geospatial data model has been considered as the key to ensure quality,integrity and interoperation of the aeronautical information.But there is little material progress on the data modeling.Based on studies on the characteristic of aeronautical information,the paper analyzed the mapping aeronautical data between and GML.Taking the basic aeronautical information database in Airline Management System as an example,an aeronautical geographic data model has been brought forward in this paper.Studies have shown that obstacle data,as special geographic points,can be described by GML model.Terrain data and basic geographic data can be converted in Open GML format.Based on GML,the aeronautical geospatial data model can not only be applied to aeronautic information,but also to obstacle data and terrain data. Based on the data model,aeronautic geospatial data can be progressed regularly,maintained centrally,and used in network.This work explores the approach of information technology on developing the future central aeronautical information database.

Key words: aeronautical information, GML, mapping, aeronautical geographic data model