| Abstract [eng] |
In the final master thesis there are investigated the possibilities of acquiring geospatial data in WEB space and using photogrammetric systems. Geographic data sources, on which the digital GIS data can be extracted, are analyzed. The modern photogrammetrical digital systems used for photographic images processing and for generation of digital terrain models are overviewed. The most commonly used digital mapping WEB site environment is analyzed. Applying the digital photogrammetry techniques, experimental materials – Vilnius aerial photographs have been processed using photogrammetric digital workstations LISA (University of Hanover, Germany) and DDPS (University of Liege, Belgium and Warsaw Institute of Geodesy and Cartography, Poland). The analysis of aerial photographs orientation, terrain models and orthophotographs generation processes was carried out and accuracy of photogrammetric measurements have been examined. The final work involve results of geodata obtaining experimental measurements performed interactively in digital space of online maps (www.maps.lt, Google Earth). The comparison accuracy analysis of the results obtained from photogrammetric measurements using aerial photography material and measurements on digital maps in online space is presented. The final conclusions, based on theoretical and practical aspects for geodata acquisition using online and photogrammetric systems, are presented. Structure: introduction, four chapters, conclusions, references. Thesis consist of: 74 p. text without appendixes, 33 pictures, 8 tables, 30 bibliographical entries. Appendixes included. |
