1 / 36

ETRS89 as reference coordinate system for Europe

ETRS89 as reference coordinate system for Europe . E. Brockmann . Topics. Basis of ETRS89 The 3 hierarchies: European – national new – national old availability and accuracy 3D 2D + 1D Country-specific situations in Europe some examples of Switzerland

tekli
Download Presentation

ETRS89 as reference coordinate system for Europe

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ETRS89 as reference coordinate system for Europe E. Brockmann

  2. Topics • Basis of ETRS89 • The 3 hierarchies: European – national new – national old • availability and accuracy • 3D • 2D + 1D • Country-specific situations in Europe • some examples of Switzerland • specifications and standards (European / national)

  3. Definition ETRS89 (=System) • Adopted in 1990 by EUREF • ETRS89 was aligned to the international reference system ITRS at epoch 1989.0. • Whereas European stations have movements of several centimeters within one year in the ITRS, ETRS89 is fixed to stable part of Europe • 2003: decision of the European Commission to relate their own geographical data to ETRS89

  4. Station movements globally • World-wide (1-10 cm/year) Europe (< 1-2 mm/year) Europe: 2.5 cm/year -> North -East

  5. Internat./EUREF “mm” National new “cm” National old“cm/dm” Realization (=Frame) • “Fixing” / Defining coordinates - High accuracies and world-wide thanks to GPS • Need for homogeneous national reference frame in Europe (Eurogeographics, INSPIRE, GIS data exchange): ETRF • National ETRF coordinates were in the past mainly computed from campaigns – today permanent networks define national reference frames • The ETRFyy realizations are used as the reference frame for Europe an in the countries! • Umbrella EUREF: EPN web portal gives detailed information on coordinates. Coordinates are mainly “scientific” oriented (weekly an multi-annual coordinate sets) • In countries “old” / distorted coordinate reference systems exist

  6. Trafo (Boucher, Altamimi) Internat./EUREF “mm” No kinematic Simple 3D-Transformation National new “cm” Fineltra Transformation cm / dm National old “cm/dm” 1989 90 91 92 93 94 95 96 97 98 99 2000 time Example: CRS in Switzerland ITRF20yy ETRF93

  7. North East North East Conversion Conversion Transformation Latitude Longitude (ell. height) Latitude Longitude (ell. height) Conversion Conversion X Y Z X Y Z Transformation - Position national CRS ETRS89 2DMap projection (+ 1D)height /geoid 3D

  8. Internat./EUREF “mm” National new “cm” National old“cm/dm” Transformation info for GIS Transformation with Meter accuraccy Definition + transformationhttp://www.crs-geo.eu Globally also available (European Petroleum Survey Group)http://www.epsg.org/ Reference for many OGC projects

  9. National Coordinate Reference Systems (CRS) in Europe

  10. Internat./EUREF “mm” National new “cm” National old“cm/dm” Relation between coordinate systems • Availability in the countries ? • accuracy 3D ? / 2D ? 1D ? • http://www.euref-iag.net

  11. ETRS status (Survey for UIC 3.Oct.2006)

  12. ETRS status (Survey for UIC 3.Oct.2006)

  13. Status of the European Permanent Network (EPN) 39 countries 223 sites Status: 1.5.2009

  14. Comparison with EPN05 densification:alternative Method using EPN web National level (e.g. CH) EPN international national • requested to report in the national report • - on sub-mm identical to method using SNX: SSC file rounded to 1 mm http://www.epncb.oma.be/_trackingnetwork/coordinates/stationcoordinates4onestation.php?station=ZIMM

  15. Number of EPN sites with official national ETRF coordinates Not yet asked (EPN sites) Ok: (xx CRD delivered / EPN sites) 2 4/4 No EPN sites used: (xx CRD delivered / EPN sites) 12 6 4 7/8 Greenland:4Israel: 2Morocco: 2Armenia: 1 1 3 1 EPN: 39 countries 223 sites 12 1/17 5/5 9 4/5 9/20 0/7 All 15 countries sent coordinates 1 2/4 10/10 4/5 16/19 5 2/2 1 Partly more site coordinates delivered (additional national + outside of the country) 3 20/31 1 1 1 3/6 4 20/35 3 Status: 1.5.2009 1

  16. EPN_ETRF_C1355.CRD EPN_ITRF_C1355.SNX ETRF2000(R05) Transformation, Epoch 2000.0 ETRF2000 ITRF2005 ETRF00 ETRF2000 ETRF93 ETRS89 ETRF05 ETRF96 ETRF93 ETRF00 ETRF2000 ETRF2000(R05) ETRF05(R05) ETRF89 ETRF2000 ETRF97 AUT_20090211.ETRF BEL_20090127.ETRF CHE_20081021.ETRF DEU_20081104.ETRF ESP_20090201.ETRF FIN_20090119.ETRF FRA_20090428.ETRF HUN_20090120.ETRF ITA_20090101.ETRF NLD_20090325.ETRF POL_20090129.ETRF PRT_20090402.ETRF SVK_20090421.ETR SWE_20081024.ETRF “National ETRF” cm ITRF ETRF Different Epochs National ETRF coordinates Comparison with EPN05 densification:Method used scientific multi-annual densification solution ITRF05 Densification solution of the EPN (Nov. 2008): data till week 1355 “EPN05” mm Comparison(Difference) official national coordinates

  17. Comparison of “official” national coordinates with scientific multi-annual EPN05 densification

  18. Why 2-3 cm differences? Limits of ETRS realizations • different ETRFYY definitions and reference epochs • transition from campaign to permanent stations • different analysis models and software used • different station setups (antenna changes) – most recent EPN station setup was used for the comparisons • mapping agencies cannot change coordinates frequently • location on “non-stable plate” (South Italy) • Well done by the national mapping agencies • Limit: stable part of Europe

  19. 2D / 1D in Europe • Map projections defined since 1999 (Eurogeographics, INSPIRE) • Height reference frame ETRF2007 • released 2008 • transformations not yet available in most of the countries; very rough transformations available at CRS web page • CH: 1-2 cm Trafo-tool planned (11 cm shift + HTRANS-type correction to old LHN02 and new LHN95) • Precise European Geoid not yet available: publication planned 2010 Requirement 5 INSPIRE will mandate the Lambert Azimuthal Equal Area (ETRS89-LAEA) for spatial analysis and display Requirement 6 NSPIRE will mandate the Lambert Conformal Conic (ETRS89-LCC) for conformal pan-European mapping at scales smaller or equal to 1:500,000 Requirement 7 INSPIRE will mandate the Transverse Mercator (ETRS89-TMzn) for conformal pan-European mapping at scales larger than 1:500,000

  20. Related topics • Other standards / specifications • ISO19100-family on geographic information • Inspire data specifications • Inspire web service specifications (e.g. coordinate Web Coordinate Transformation Service (WCTS); Web Processing Service (WPS)) • National specifications (geoservices; CH: e-geo) “INSPIRE Annex I data specifications”

  21. Internat./EUREF “mm” National new “cm” National old“cm/dm” Relation between coordinate systems Stable part of Europe • Availability in the countries • accuracy 3D / 2D 1D • http://www.euref-iag.net • Availability in the countries ? • accuracy 3D ? / 2D ? 1D ?

  22. Example CH: distortions

  23. New Reference System CHTRS95 (Reference Frame LV95) “old coordinates” 200’000 / 600’000 “new coordinates” 1’ 200’000 / 2’ 600’000

  24. Transformation: Old <-> New System LV95 LV03 Trafo using Finite Elements: ▬ national „dm“-transformation ▬ cantonal „cm“-transformation Model name: CHENyx06 5'925 transformation points 11'731 triangles

  25. Accuracy of the transformation • 46‘600 control points (CP) 2.2 points per km2 • maximal CP influence 1.5 km • interpolation (using 1/d2 and max. 1.5 km) • Empirical accuracy: 2 cm ± 1 cm

  26. CH: Geoid + Height Transformation LN02-LHN95 Height system remains “old” LHN02 • Available for • Receiver • Office programs (TGO, other GNSS software) • both included in REFRAME Geoid CHGeo2004 HTRANS 1 km grids available -0.20 <-> +0.55 m ± 3 – 15 cm (far from levelling lines) -5 <-> +5 m± 2 – 5 cm (alps) free of charge: NOT free of charge:

  27. Method „Grids“ • ~ 1 mm identical to dm-FINELTRA (1 km raster) • < 1 cm difference to cm-FINELTRA (1 km raster) • < 1 cm to HTRANS (1 km raster); high alps < 10 cm

  28. Mapping Navigation yes m: Simply add1’000’000 and 2’000’000 Usage of transformation data set availability horizontal accuracy GIS yes dm: National Trafo: 1-3 dm (moderate elevations) up to several dm (mountains) Federal surveying yes cm: Cantonal Trafo: Depending quality of the areas: 1 cm up to some dm Example CH: accuracy and usage of transformation

  29. 2000 … 2006 2007 2008 … 2016 2017 … 20XX renewal Δ-generation Change of the reference frame work geobasis data LV03 LV95 reference frame LV03 LV95 GeoIG and reference frame • Geographic information law + 10 ordinances, came into force 1.7.2008 • Transitions phase for LV95: 2016 for geobasis data regulated by federal law; 2020 for all geobasis data Height system remains “old” LHN02

  30. Support for transformations 1. Download of CHENyx06 data set; dlls are available 2. off-line transformation program “REFRAME” 4. View of transformation accuracy • LV03-LV95-ETRS • geoid, • height systems LN02-LHN95 3. on-line transformations 5. transformation supported also by positioning service swipos® in real-time (special phone number) 4 3 2

  31. Examples Grids / FINELTRA usage in third-party software • Leica GPS Software (CSCS): Country specific coordinate systems • ESRI: FINELTRA dll included • NTV2 Format as European-wide standard for the transformation

  32. Grids (plane trafo) in other EU countries • At annual EUREF not a “hot” topic (no big discussions) -> also available in the countries (but different accuracies) • For UIC (2006) a detailed status was collected for countries France, Germany, Netherlands, Poland, Spain, Sweden, Switzerland - all countries have slightly different solutions, but the goal of the transformation “old”-”new” is reached.

  33. Internat./EUREF “mm” National new “cm” National old“cm/dm” Relation between coordinate systems Stable part of Europe • Availability in the countries • accuracy 3D / 2D 1D • http://www.euref-iag.net • Availability in the countries • accuracy 3D / 2D 1D Solutions country- and software-specific

  34. Advantages of ETRS • ONE reference system for Europe • Linked to the international reference system ITRS • Easily accessible with GPS • No distortions in the network / no adoption to neighbouring points • „Absolute“ coordinates / less maintenance work for local reference points • Simple handling of coordinates for users (economy, administration, etc.) • Enables an exchange of geographical data

  35. Thanks for your attention! C. Calvert: EUREF–Symposium 2005, Vienna

More Related