A Strategic Plan for Geodesy in Sweden. Mikael Lilje Lars E. Engberg Geodesy Department Lantmäteriet Sweden

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1 A Strategic Plan for Geodesy in Sweden Mikael Lilje Lars E. Engberg Geodesy Department Lantmäteriet Sweden

2 Our vision is to be able to meet Swedish society s needs for a homogeneous, sustainable geodetic infrastructure and to guarantee its availability and use. Geodetic infrastructure: Geodetic reference systems and networks (passive and active) Systems for the provision of data and support 2

3 LANTMÄTERIET S GEODETIC ROLE Provide and monitor national referenceand co-ordinate system. Best practice provider of efficient, accurate & innovative use of GPS/GNSS and other geodetic techniques Research, Advisory service and Support National (and international) experts 3

4 FOCUS ON EFFICIENT USE OF GNSS IN SWEDEN SWEPOS The Swedish national CORS National Network-RTK service 4

5 Our history based on angles and lengths as well as levelling 5

6 Laste decade(s) Space Geodetic Techniques a large toolkit

7 VLBI Modern Geodetic Techniques significant ground-based infrastructure GNSS Sup.Grav. Abs.Grav. DORIS Tide Gauges SLR/LLR

8 IGS Geodetic CORS Network Many countries & organisations contribute to the IGS, and many more benefit from this collective investment free raw GNSS data, derived products & connection to the ITRF. 8

9 EPN/EUREF IGS network relies heavily on regional scientific and national reference frame networks. Regional reference frame activities help to fill in gaps in global network coverage of stations that can be used in the generation of IGS products. 9

10 Our 3D reference system - SWEREF 99 Producer: Lantmäteriet Epoch: (Plate movements) GPS campaign in 1999 Adopted by EUREF as an ETRS 89 realisation in 2000 Introduced as national reference frame in 2001 SWEREF 99 TM SWEREF 99 dd mm 10

11 The Swedish Height System - RH 2000 Third national precise levelling New national height system (RH 2000) in 2005 Connected to EVRS - Baltic Levelling Ring Motorised levelling points, km Standard deviation 1 mm/ km Connected to European Height System Land uplift correction, epoch

12 WE ARE AIMING AT National One 3-D system (SWEREF 99) One horizontal solution (based on SWEREF 99) One height system (RH 2000) Locally Few local horizontal systems Few local height systems Provide the users with necessary tools and support for an efficient use of SWEREF 99 and RH Monitor and secure the use of our current systems for the future. 12

13 We will focus on More accurate heights from Network-RTK Better geoid model; uncertainty (1σ) of 1 cm year 2015, 0.5 cm year 2020 Creating a new gravity system, RG 2000, for Sweden Better gravity observations all over the country Carry out R&D theories and methods for geoid determination Densification of the SWEPOS network Strive to promote an early introduction of modern GNSS 13

14 Geodesy 2010 focusing on the users Who are the users? What do they need? Today: Lower the uncertainty but with high reliability and accesibilty to a lower cost for instruments and services. New user groups: Agriculture and machine guidance. These users are not interested in the geodesy behind the tool, they just want the black box to work. 14

15 We will also focus on Complete transition to SWEREF 99 and RH 2000 R&D work concerning the maintenance of reference systems and their sustainability A better model (3D) for the fennoscandian land uplift To ensure the long-term sustainability of our reference systems SWEREF 99, RH 2000 and RG

16 New reference frames Implementation in the municipalities 243 (out of 290) have changed to SWEREF (out of 290) have changed to RH 2000 (Swedish EVRS realisation) Voluntary changes! No legislation forcing the use of SWEREF99, RH 2000 Well developed cooperation and understanding between Lantmäteriet and the users 16

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18 Geodesy is a vital part in the Climate Change discussion Observations Global and Regional Reference Frames Knowledge 18

19 We will also Contribute to international geodetic co-operation both by supplying data and by actively participating in working groups To ensure that the European reference systems ETRS89 and EVRS still remain in use for technical applications by year

20 Thank You! THANK YOU FOR YOUR ATTENTION 20