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: valdis.vanags@vzd.gov.lv

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

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

September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia

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Aerial photography 1:30000

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

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

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

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

September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia

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Aerial photography 1:30000, second coverage

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

September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia

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Aerial photography 1:5000 – 1:11200

September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia

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Aerial photography with 4k x 4k digital camera

September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia

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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”

September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia

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Aerial photography 1:5000 for “Latvian Railroad”

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

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

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

September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia

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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

September 13-16, 2005 5th International PHOTOMOD User Conference, Jurmala, Latvia

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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: valdis.vanags@vzd.gov.lv