september 13-16, 20055th international photomod user conference, jurmala, latvia 1 development of...
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September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia
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DEVELOPMENT OF PHOTOGRAMMETRY IN THE STATE LAND SERVICE OF THE REPUBLIC OF LATVIA
Valdis VanagsThe State Land Service of the Republic of Latvia (SLS)
Large Scale Mapping Department
E-mail: [email protected]
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September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia
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First steps of development
• In 1992 SLS was founded
• Some tasks of SLS:
- to develop, introduce and maintain the state cadastre of land and other real estate
- state cadastral mapping
- state topographic surveying and mapping • Pilot project in cooperation with “Kampsax Geoplan” in
1993
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September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia
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Latvian national cadastre mapping program
• Start of photogrammetry in Latvia from scratch
• Aerial photography in co-operation with “Swedesurvey”, scale 1:30000, B/W
• Orthophoto production, scale 1:10000
• On the job training – flight planning, aerial triangulation
• First photogrammetric instruments – two Wild A8, SOS-Map software
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September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia
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Aerial photography 1:30000
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September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia
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Cartography development concept
• Adopted in 1995
• Development of system of photogrammetry planned:
- aerial camera
- photo laboratory
- analytical stereoplotters
- digital photogrammetric workstations
- auxiliary photogrammetric devices
- geodetic instruments
- computer equipment
- cars
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September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia
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First modern photogrammetric equipment
• Implementation of cartography development concept:- analytical stereoplotter SD2000 for stereoplotting at the scale 1:2000
- digital photogrammetric workstation DPW770 for orthophoto production
- 2 digital photogrammetric workstations DVP for stereoplotting at the scale 1:10000
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September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia
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Phare project “Technical assistance for land registration and privatization in
Latvia” • Training of stereooperators and other staff of SLS
• Study trips to some European companies
• Course in digital photogrammetry in Lausanne Politechnic
• Expert consultations in development of product specifications, stereoplotting, orthophoto production and production monitoring
• Purchase of digital photogrammetric workstation DPW770
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September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia
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Riga mapping project
• Started in 1999
• B/W aerial photography at scale 1:6200 with narrow angle camera
• Mapping at scale 1:2000
• Purchase of equipment:
- photogrammetric scanner DSW300
- 2 analytical stereoplotters SD3000
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September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia
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Aerial photography 1:30000, second coverage
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September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia
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Aerial photography for mapping at scale 1:2000
• 1994: Riga
• 1995: Daugavpils
• 1997: Liepaja, Madona
• 1998: Cesis
• 1999: Riga
• 2001: Ventspils, Jelgava, Bauska, Ogre
• 2002 – 2005: about 50 populated places
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September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia
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Aerial photography 1:5000 – 1:11200
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September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia
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Aerial photography with 4k x 4k digital camera
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Other projects
• Road mapping for Latvian road directorate
• Railroad mapping for “Latvian railroad”
• Aerial triangulation of infrared images for “FM-Kartta”
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September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia
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Aerial photography 1:5000 for “Latvian Railroad”
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September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia
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PHOTOMOD
• First modules in 2002
• Licences: 2 AT, 3DTM, 2MOSAIC; 1 full local version
• Used for orthophoto mapping at scales 1:2000 and 1:10000 and for topographic mapping at scales 1:2000
• Orthophoto production stuff: 6 operators (2 skilled)
• Orthophoto productivity: ~ 1000 – 1400 map sheets per year
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September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia
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Employees
• Graduates from Riga Technical University, Latvian Agricultural University and Latvian University
• Some have education in previous USSR and had working experience in soviet cartographic factories
• Some employees had no special knowledge
• About 20 persons active in photogrammetry in SLS at the moment
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September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia
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Future development perspectives
• Use of GPS/IMU data
• Use of large format digital cameras (a competition announced until September 23, 2005)
• Use of laser scanning data (a competition announced until September 28, 2005)
• Use of satellite imagery
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Conclusions
• SLS able to carry out most of photogrammetric jobs
• Problems:
- lack of own aerial camera
- lack of qualified personel
• Reorganization of SLS may influence the future development
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Thank you for your attention!
Valdis VanagsThe State Land Service of the Republic of Latvia (SLS)
Large Scale Mapping Department
E-mail: [email protected]