The project defines the way of definition of air obstacles using a DTM for all field of air traffic. It exploits not only the database of air obstacles maintained according to international standards in the Czech Republic but also databases maintained in the frame of operation components. The individual part of the project is definition of air obstacles from own observations by new methodologies.
- The aerial obstacles data gathering based on digital elevation models technology is primarily developed for semi-automized identification of aerial obstacles in the vicinity of the IFR type airports, as well as for determination of obstacle attributes as specified in Eurocontrol and ICAO documents. Alternatively it serves for finding, delimitation a classification of those areas and lines, on which the obstacles exist with certain level of probability. Only a set of analytical source materials is created whereas an identification and a complete determination of obstacles and their attributes will be carried out later in the field. Technology is based on the computational analyses of mutual vertical relations between 3D digital terrain elevation and digital surface models and model of surface intended to protect aircraft in flight. The calculated model penetrations are subsequently portrayed and edited as well as interpreted and classified with use of raster and vector geographical sources available as WMS from official geoportal of the Czech Office of Geodesy and Cadastre afterwards. The results of the technological processes are twofold: complete digital data sets on obstacles gained in office and analytical source materials for streamlining the data collection in the field.
- The software for determination of aerial obstacles from the model uses the application of MicroStation V8i, SS3 System in MDL. It analyses the 3D geospatial data models to localize the vertical aerial obstacles and to assess their key attributes or to find out in these models the localities with probable presence of these obstacles and to portray these graded areas over digital imagery and raster maps.