1. 11 th International Scientific and Technical Conference September 19–22, 2011, Tossa de Mar, Spain From imagery to map: digital photogrammetric technologies photogrammetry@gis-sofia.bg UPDATING OF BULGARIAN LARGE SCALE TOPOGRAPHIC MAPBY DIGITAL PHOTOGRAMMETRIC SOFTWARE PHOTOMOD 5.1 UPDATING OF BULGARIAN LARGE SCALE TOPOGRAPHIC MAP BY DIGITAL PHOTOGRAMMETRIC SOFTWARE PHOTOMOD 5.1 GIS-SOFIA Ltd., Bulgaria Vanya Petrova, M. Sc.

2. INTRODUCTION 1920 - 1930 – Start application of large scale topographic mapping by aerial photogrammetry in Russia and USA 1939 – 1945 – During the Second World War large scale mapping became common occurrence for all countries, participated in the war After 1945 – All European countries started topographic mapping by aerial photogrammetry Updating of Bulgarian large scale topographic map by digital photogrammetric software PHOTOMOD 5.1, Vanya Petrova September 19–22, 2011, Tossa de Mar, Spain From imagery to map: digital photogrammetric technologies 11 th International Scientific and Technical Conference

3. PHOTOGRAMMETRY IN BULGARIA 1942 - Start application of aerial stereophotogrammetry for production of topographic map at 1:25 000 scale 1955 - Start application of aerial stereophotogrammetry for production of topographic maps at 1:5000 and 1: 10 000 scale All maps periodically are revised 1983 - 1996 - Orthophotoplans at 1:5000 and 1:10 000 scale are prodused over 85% of Bulgarian territory, intended for rural cadastre 2006, 2010, 2011 - Orthophotoplans at 1:10 000 scale are made for the Ministry of Agriculture and Food over the 98% of the territory of Bulgaria (111 000 sq. km) 2008 - Digital aerial photogrammetry is used for production of orthophotoplans at 1:1000 and 1:2000 scale over territory of 1467 sq. km Sofia Municipality, as well as generation of DTM Updating of Bulgarian large scale topographic map by digital photogrammetric software PHOTOMOD 5.1, Vanya Petrova September 19–22, 2011, Tossa de Mar, Spain From imagery to map: digital photogrammetric technologies 11 th International Scientific and Technical Conference

4. DIGITAL PHOTOGRAMMETRY AND GEO DATA Aerial photogrammetry Satellite photogrammetry Updating of Bulgarian large scale topographic map by digital photogrammetric software PHOTOMOD 5.1, Vanya Petrova September 19–22, 2011, Tossa de Mar, Spain From imagery to map: digital photogrammetric technologies 11 th International Scientific and Technical Conference

5. WHY DIGITAL PHOTOGRAMMETRY? High accuracy, good visualization with high pixel resolution and quick results over the large territories (thuss updating topographic maps will compensate the loss of time) Satellite sensors may soon replace the aerial photography These images would be captured and transmitted as digital data, which could be processed by computers There are enormous fields where digital photogrammetry can be used, for example creation of 3D models, etc. Updating of Bulgarian large scale topographic map by digital photogrammetric software PHOTOMOD 5.1, Vanya Petrova September 19–22, 2011, Tossa de Mar, Spain From imagery to map: digital photogrammetric technologies 11 th International Scientific and Technical Conference

6. THE PILOT PROJECT PURPOSE TECHNICAL REQUIREMENTS To create new technical specifications according to the modern standards and technologies and to meet user needs For identification of main activities and rules for creating digital large scale topographic maps (1:5000, 1:10 000), map content, technical processes To serve as a solid basis for current technical specifications, regulating the requirements and guidance of technology for creating and updating digital topographic database collection and use of topographic information Bulgarian Geodetic System - BGS 2005 Digital model Accuracy - according existing technical specification Classification of map symbols Filling in database from various sources of information Updating of Bulgarian large scale topographic map by digital photogrammetric software PHOTOMOD 5.1, Vanya Petrova September 19–22, 2011, Tossa de Mar, Spain From imagery to map: digital photogrammetric technologies 11 th International Scientific and Technical Conference

7. THE PILOT PROJECT SCOPE OF THE PROJECT Photogrammetric processing Interpretation and stereovectorization Determination of metric characteristics of the terrain, landforms and vegetation, as well as determination of roads, rivers, streams etc. width Creating a database Using the elements of digital cadastral map Database of geographical names Printing the map Updating of Bulgarian large scale topographic map by digital photogrammetric software PHOTOMOD 5.1, Vanya Petrova September 19–22, 2011, Tossa de Mar, Spain From imagery to map: digital photogrammetric technologies 11 th International Scientific and Technical Conference

8. THE PILOT PROJECT WORK FLOW Photogrammetric processing and stereovectorization  Terrain forms  Railways  Rivers and water areas  Pipelins and equipment  Supporting walls  Buildings and other features Field inspection Adding the information after inspection Creating a database Cartography process Printing the map Updating of Bulgarian large scale topographic map by digital photogrammetric software PHOTOMOD 5.1, Vanya Petrova September 19–22, 2011, Tossa de Mar, Spain From imagery to map: digital photogrammetric technologies 11 th International Scientific and Technical Conference

9. GENERAL INFORMATION Area: 1467 sq. km Terrain: flat, lightly hilly and hillylow houses Average height of the terrain above sea level: 750 m AREA CHARACTERISTICS Updating of Bulgarian large scale topographic map by digital photogrammetric software PHOTOMOD 5.1, Vanya Petrova September 19–22, 2011, Tossa de Mar, Spain From imagery to map: digital photogrammetric technologies 11 th International Scientific and Technical Conference Blocks of aerial pictures ………………….... ……………...... ……........ 36 Strips of aerial pictures …….... …....................................................... 58 Aerial pictures ……………….... ……….............. …….......................5669 Ground pixel size (GSD).....10 cm (urban area) and 20 cm (rural area) Average flight height …...1000 m (urban area) and 2000 m (rural area) Pre-marked points on the terrain ……….. ………………. ………. …. 393 Pictures per 1 pre-marked point ………….. …………………………… 14

10. CONFIGURATION OF PHOTOMOD 5.1 PHOTOMOD Core PHOTOMOD AT PHOTOMOD SolverA PHOTOMOD SteroVector PHOTOMOD Mosaic OTHER SOFTWARE PRODUCTS USED ArcView AutoCADlow houses ArcGIS Adobe Illustrator CorelDraw Updating of Bulgarian large scale topographic map by digital photogrammetric software PHOTOMOD 5.1, Vanya Petrova September 19–22, 2011, Tossa de Mar, Spain From imagery to map: digital photogrammetric technologies 11 th International Scientific and Technical Conference

11. Updating of Bulgarian large scale topographic map by digital photogrammetric software PHOTOMOD 5.1, Vanya Petrova September 19–22, 2011, Tossa de Mar, Spain From imagery to map: digital photogrammetric technologies 11 th International Scientific and Technical Conference CREATING OF DIGITAL MODEL OF DATA

12. Updating of Bulgarian large scale topographic map by digital photogrammetric software PHOTOMOD 5.1, Vanya Petrova September 19–22, 2011, Tossa de Mar, Spain From imagery to map: digital photogrammetric technologies 11 th International Scientific and Technical Conference CREATING OF DTM

13. Updating of Bulgarian large scale topographic map by digital photogrammetric software PHOTOMOD 5.1, Vanya Petrova September 19–22, 2011, Tossa de Mar, Spain From imagery to map: digital photogrammetric technologies 11 th International Scientific and Technical Conference CREATING OF DATABASE Geodetic data - triangulation and working networks Topographic data - points, lines, polygons  Structure of geospatial data  Sources and methods for acquisition of geospatial data  Requirements of minimum attribute information for graphic data and metadata  Technical specification for quality of geospatial data DATA FORMAT

14. CONCLUSIONS AND RECOMMENDATIONS Concerning the modern digital technology and the steady increase urban territories, it is necessary to create and update the entire topographic information For the new method of mapping i.e. new technologies, technical means and software it is needed to create new ordinances or to update the old ones The digital technology significantly reduce the time required for producing or updating maps and will improve the overall accuracy Classical mapping is supplemented by new types of visualization systems from different platforms The pictures themselves represent huge opportunities for visualization and analysis of 2D, 3D and 4D data These capabilities must be integrated into e-government and e-commerce development Internet provides more efficient means of communication than printed media especially when it comes to rapidly developing technology Updating of Bulgarian large scale topographic map by digital photogrammetric software PHOTOMOD 5.1, Vanya Petrova September 19–22, 2011, Tossa de Mar, Spain From imagery to map: digital photogrammetric technologies 11 th International Scientific and Technical Conference

15. THANK YOU FOR YOUR ATTENTION ! Updating of Bulgarian large scale topographic map by digital photogrammetric software PHOTOMOD 5.1, Vanya Petrova September 19–22, 2011, Tossa de Mar, Spain From imagery to map: digital photogrammetric technologies 11 th International Scientific and Technical Conference