eurogrid workshop oct.27-29, 2003, jrc, ispra. the european datum etrs89 and related map projections...

EuroGrid Workshop Oct.27-29, 2003, JRC, ISPRA


The European Datum ETRS89 and Related Map Projections

Johannes Ihde

Federal Agency for Cartography and Geodesy


Contents

1. The European Spatial Reference and Map Projection Workshops

2. Realization of ETRS89 and its Practical Use

3. Coordinate Systems and Map Projections

4. CRS Internet Portal


The Spatial Reference Workshop 1999 and the Map Projection Workshop 2000 recommends to the European Commission:

1. To adopt ETRS89 as geodetic datum and to express and store positions, as far as possible, in ellipsoidal coordinates, with the underlying GRS80 ellipsoid [ETRS89]. Three map projections are required to supplement the ellipsoidal system. (Adopted for geo data of the Commission)

1. The European Spatial Reference and Map Projection Workshops


2. To adopt EVRF2000 for expressing practical heights (gravity-related).

3. To take strong action to support the work of EUREF, EuroGeographics and the NMAs in collecting and making available in a public domain the definitions of various coordinate reference systems (realized by CRS internet portal), and definitive transformation parameters between the national reference systems and ETRS89 (realized for 3 m accuracy level), as well as EVRF2000 (in preparation).


ISO 19111 (ISO/TC 211, WI 11) Spatial referencing by coordinates

DIS November 2000, IS 2003ScopeWI 11 describes the conceptual schema and defines the description for a minimum data to two cases for which 1-, 2- and 3-dimensional coordinate reference system (CRS) information shall be given:

• Case A: A coordinate reference system to which a set of coordinates is related.

• Case B: An operation (transformation, conversion, concatenated operation) to change coordinate values from one coordinate reference system to another.


Coordinate reference system (CRS) is a coordinate system which is related to the Earth by a datum

datumcoordinate system

map projection

geodetic vertical engineering

coordinate reference systemterrestrial reference system

grid


Components of a European spatial reference system

(CRS)E uropean geore fe renc ing by coordina tes

geodetic datumETRS89

coordinate systemellipsoidal/projected UTM

European Terrestrial Reference System(ETRS)

vertical datumNAP

gravity-related heightsgeopotential num bers

norm al heights

European Vertical Reference System(EVRS)

European Spatial Reference System(com pound coordinate reference system )


2. Realization of ETRS89 and its Practical UseStatement:

ETRS89 is recognised by the scientific community as the European geodetic datum to be adopted. It is defined to 1cm accuracy, and it is consistent with the global ITRS.

ETRS89 is available due to the EUREF permanent GPS station network EPN and the validated EUREF campaign observations.

It is part of the legal framework of some EU member states.


Terrestrial Reference System (TRS)

A TRS is mathematically defined as an Euclidian affine frame with an origin, scale and orientation in relation to the Earth body

A TRS is realized by coordinates of physical points an or near the Earth surface


The International Terrestrial Reference System (ITRS)

• The geodetic datum (origin, orientation, scale) of ITRS is defined by conventions (2002) of the International Earth Rotation Service (IERS of IAG)

• ITRS is realized by a series of frames (ITRF last one is 2000) with coordinates and velocities of some hundred world wide geodetic stations (Service of IAG)


The European Terrestrial Reference System 1989 (ETRS89)

•The European Continental Plate is moving quite uniformly of some 3 cm per year, relatively to the ITRS. Excepted is of the south-eastern extreme of Europe (Greece, Turkey).

•The IAG Sub-commission for Europe EUREF decided to define a System fixed to the European plate in order to have stable co-ordinates for Europe.

•This System (datum) is named ETRS, or ETRS89, as was identical to the ITRS in the year 1989.

•Since 1989, ETRS89 co-ordinates have shifted from their values expressed in ITRS. The shifts are monitored by IERS and EUREF.

•This shift is well known, and transformations from one to the other are possible for most part in a 1 cm accuracy. The shift parameter are given with the ITRF solutions.


European Terrestrial Reference System 1989 (ETRS89)

is the geodetic datum for pan-European spatial data collection, storage and analysis.

This is based on the GRS80 ellipsoid and is the basis for a coordinate reference system using ellipsoidal coordinates.

The ETRS89 Ellipsoidal Coordinate Reference System (ETRS89) is recommended to express and to store positions, as far as possible.


ETRS89 Ellipsoidal Coordinate Reference System (ETRS89) Description

Entitiy Value

CRS ID ETRS89

CRS valid areaEurope

Datum scope European datum consistent with ITRS at the epoch 1989.0 and fixed to the stable part of the Eurasian continental plate for georeferencing of GIS and geokinematic tasks

Datum remarks see Boucher, C., Altamimi, Z. (1992): The EUREF Terrestrial Reference System and its First Realizations. Veröffentlichungen der Bayerischen Kommission für die Internationale Erdmessung, Heft 52, München 1992, pages 205-213- or -ftp://lareg.ensg.ign.fr/pub/euref/info/guidelines/

Prime meridian ID Greenwich

Prime meridian Greenwich longitude 0°

Ellipsoid ID GRS 80

Ellipsoid semi-major axis 6 378 137 m

Ellipsoid inverse flattening 298.257222101

ftp://lareg.ensg.ign.fr/pub/euref/info/guidelines/


















No. stations:130 total

42 IGS

EUREF GPS Permanent Network EPN


EUREF GPS Permanent Network (EPN)- Organization -

EUREF GPS Permanent Network (EPN)- Organization -

EPN Coordination Group

• Network Coordinator

C. Bruyninx, ROB

• Analysis Coordinator

H. Habrich, BKG

• Dataflow Coordinator

G. Stangl, OLG

• Technical Working Group representative

W. Gurtner, AIUB

• Special projects representatives

EPN Central Bureau EPN Special Projects

Tasks:

• Day-to-day general management of the EPN

• Realization of a policy as prescribed by the Technical Working Group

• Provide all EPN related information

Head: C. Bruyninx, ROB

• Time series for geokinematic

Head: A. Kenyeres, FOMI

• Troposphere parameter estimation

Head: G. Weber, BKG


EPN Analysis and Data Centers

Local Analysis Center Regional Data Center Local Data Center

NGK

BEK

BKG

WUT

GOP

SGO

LPT

OLG

UPA

ASI

COE

IGE

IGN

ROB

DEO


3. Coordinate Systems and Map Projections

A coordinate system is a set of mathematical rules for specifying how coordinates are to be related to points.

Map projections are special coordinate systems. The rules defining the map projections are conversions between ellipsoidal coordinates and coordinates of the map projections.


The Map Projection Workshop 2000 recommends that the European Commission:

• Uses for statistical analysis and display a ETRS89 Lambert Azimuthal Equal Area coordinate reference system of 2001 [ETRS -LAEA], that is specified by ETRS89 as datum and the Lambert Azimuthal Equal Area map projection.

• Uses for conformal pan-European mapping at scales smaller or equal to 1:500,000 ETRS89 Lambert Conic Conformal coordinate reference system of 2001 [ETRS -LCC] that is specified by ETRS89 as datum and the Lambert Conic Conformal (2SP) map projection.

• Uses for conformal pan-European mapping at scales larger than 1:500,000 ETRS89 Transverse Mercator coordinate reference systems [ETRS-TMzn].


For pan-European statistical mapping at all scales or for other purposes where a true area representation is required, the ETRS89 Lambert Azimuthal Equal Area Coordinate Reference System (ETRS-LAEA) is recommended.

The ETRS89 Lambert Azimuthal Equal Area Coordinate Reference System (ETRS-LAEA) is a single projected coordinate reference system for all of the pan-European area. It is based on the ETRS89 geodetic datum and the GRS80 ellipsoid.


Operation method parameters number 4

Operation parameter name latitude of origin

Operation parameter value 52° N

Operation parameter name longitude of origin

Operation parameter value 10° E

Operation parameter name false northing

Operation parameter value 3 210 000.0 m

Operation parameter remarks

Operation parameter name false easting

Operation parameter value 4 321 000.0 m


ETRS89 Lambert Azimuthal Equal Area Coordinate Reference System (ETRS-LAEA) Description


Content

Reference

Contact

Description CRS(ETRS89 cart / e llip)

Europe

European CRS

Description CRS Transform ation-param eters to ETRS89

European countries

national CRS

http://crs.ifag.de

4. CRS Internet Portal

Information System for European Coordinate Reference Systems - Structure

Homepage


| | | | |

N ti l C di t R f S t (CRS)

Pick a country in the list or a red dot in the m ap, then you can ge t a t the next page the inform ation abou t the C oordina te R eference System s C R S and the Transfo rm ations to ET R S89 fo r the country:

a ona oor na e e erence ys em s of European Countries and

Transform ations to European Terrestrial Reference System ETRS89

Copyrigh t by BKG 2001 Last Update 20. A pril 2001

oHo m e C o n ten t Eu r o p ean C R S Nat io n al C R S C n tac t Re fer en c e

Turkey

Sw eden

S lovenia

Russia

Portuga l

Norw ay

Netherlands

Luxem bourg

Latvia

Ire land

Hungary

G reat Brita in

G erm any

F in land

Denm ark

Cyprus

Bulgaria

Austria

Ukra ine

Sw itzerland

Spa in

S lovak R epublic

Rom ania

Poland

Northern Ire land

M acedonia

Lithuan ia

Ita ly

Ice land

G reece

G ibra lta r

France

Estonia

Czech R epub lic

C roatia

Belgium

A lbania

SWEDEN

Selection of CRS


Country identifier CRS identifier

alias valid area

Datum identifier alias type anchor point valid area scope remarks

Prime meridian identifier greenwich longitude remarks

Ellipsoid identifier alias semi major axis shape inverse flattening remarks

Coordinate system

identifier type dimension n remarks n axis name n axis direction n axis unit identifier

Operation identifier valid area method name method name alias method formula method parameters number m method remarks m parameter name m parameter value m parameter remarks

Description of CRS


Description of Coordinate Reference System (CRS) — AT_MGI / AT_TM Country Austria Country identifier AT

CRS identifier AT_MGI / AT_TM

CRS alias

CRS valid area Austria

Datum identifier MGI

Datum alias Militärgeographisches Institut Datum type geodetic

Datum anchor point Austria, Hermannskogel, Habsburgwarte, Lat=48°16'15.2900" N, Lon=16°17'41.0600" E (wrt. Greenwich)

Datum valid area Austria Datum scope Datum remarks Prime meridian identifier Ferro

Prime meridian greenwich longitude 17°40' W

Prime meridian remarks

Ellipsoid identifier Bessel 1841

Ellipsoid alias

Ellipsoid semi major axis 6 377 397.155 m

Ellipsoid shape true

Ellipsoid inverse flattening 299.15281285

Ellipsoid remarks

Coordinate system identifier AT_TM

Coordinate system type projected

Coordinate system dimension 2

Coordinate system remarks

Coordinate system axis name X / northing

Coordinate system axis direction North

Coordinate system axis unit identifier meter

Coordinate system axis name Y / easting

Coordinate system axis direction East

Coordinate system axis unit identifier meter

Operation identifier AT_TM

Operation valid area Austria

Operation method name Transverse Mercator Projection

Operation method name alias Gauss Krüger Projection Operation method formula Transverse Mercator Mapping Equations, in Hooijberg,

Practical Geodesy, 1997, pages 81-84 Operation method parameters number 6

Operation method remarks Transverse Mercator Projection, 3 grad width, individual central meridians wrt. Ferro

Operation parameter name latitude of origin

Operation parameter value 0° Operation parameter remarks 0°, the Equator Operation parameter name longitude of origin

Operation parameter value central meridians 28° E, 31° E, 34° E wrt. Ferro Operation parameter remarks central meridian (CM) of each zone Operation parameter name false northing

Operation parameter value 0 m Operation parameter remarks Operation parameter name false easting

Operation parameter value 0 m Operation parameter remarks zone number are explicit Operation parameter name scale factor at central meridian

Operation parameter value 1.0000 Operation parameter remarks Operation parameter name width of zone

Operation parameter value 3° Operation parameter remarks


Transformations between geodetic datum, map projections

and geographical grids in geodesy and geoinformation

Johannes Ihde, Jens Luthardt

Federal Agency for Cartography and Geodesy

and

Members of the Expert Group Geodesy (ExG G) of EuroGeographics, former WG 8 of CERCO

Zuheir Altamimi, Heinz Habrich, Joao Torres, Georg Weber


Contents

1. Spatial reference Systems – The European Situation

2. Datum Transformation

3. Coordinate Conversion and Map Projections

4. Transformation of Grid Related Information

5. Realisation of a web-based Geodetic Information and Service System – GISS

6. Contribution of ExG-G and EUREF to ESDI


Coordinate reference system (CRS) is a coordinate system which is related to the Earth by a datum

datumcoordinate system

incl. map projection

geodetic vertical engineering

coordinate reference systemterrestrial reference system

(grid)


1. Spatial reference systems –

The European Situation

A referense frame is the realization of a defined reference system


Components of European spatial reference systems

(CRS)

E uropean geore fe renc ing by coordina tes

geodetic datumET RS89

coordinate systemellipsoidal/

three m ap projections

European T errestria l Reference System(ET RS)

vertical datumNAP

gravity-related heightsgeopotentia l num bers

norm al heights

European Vertical Reference System(EVRS, EVRF 2000)

European Spatia l Reference System(com pound coordinate reference system )


European Coordinate Reference Systems incl. map projections

ETRS89 Ellipsoidal CRS

for storing of positions in

general ellipsoidal latitude, longitude and height

based on ellipsoid GRS80 ETRS-TMzn

ETRS Transverse Mercator CRS

for topographic maps with scales lower or equal 1 : 500 000

similar UTM for northern hemisphere

ETRS-LCC

ETRS Lambert Conformal Conic CRS

for topographic maps with scales larger than 1 : 500 000

Lambert projection with 2 parallels

ETRS-LAEA ETRS89 Lambert Azimuthal Equal Area CRS

for statistical purposes and all applications with equal area projections


National Coordinate Reference Systems (CRS) in Europe

# Country ID Coordinate Reference System (CRS) Identifier

Datum Projection

1 Albania AL AL_ALB87 / AL_TM ALB87 Transverse Mercator

2 Austria AT AT_MGI / AT_TM MGI Transverse Mercator

3 Belgium BE BE_BD72 / Lamb72 BD72 Lambert Conformal Conic

4 Bulgaria BG BG_1942 / GK_3 1942 Transverse Mercator (Gauss-Krüger-System)

BG BG_1942 / TM_6 1942 Transverse Mercator

5 Croatia HR HR_HDKS / GK_3 HDKS Transverse Mercator (Gauss-Krüger-System)

6 Cyprus CY CY_ED50 / UTM ED50 Transverse Mercator (UTM)

7 Czech Republic CZ CZ_S-JTSK / JTSK_OCC S-JTSK Oblique Conformal Conic

8 Denmark DK DK_ED50 / UTM ED50 Transverse Mercator (UTM) 9 Estonia EE EE_EST92 / LambEST92 EST92 Lambert Conformal Conic

10 Finland FI FI_KKJ / FI_TM KKJ Transverse Mercator

11 France FR FR_ED50 / EUROLMB ED50 Lambert Conformal Conic

FR FR_NTF / Lamb NTF Lambert Conformal Conic

12 Germany DE DE_DHDN / GK_3 DHDN Transverse Mercator (Gauss-Krüger-System)

DE DE_RD83 / GK_3 RD83 Transverse Mercator (Gauss-Krüger-System)

DE DE_PD83 / GK_3 PD83 Transverse Mercator (Gauss-Krüger-System)

DE DE_42/83/ TM_6 42/83 Transverse Mercator

13 Gibraltar GI GI_ED50 / UTM ED50 Transverse Mercator (UTM) 14 Great Britain GB GB_OSSN(80) / NG OSSN(80) Transverse Mercator

15 Greece GR GR_GGRS87 / GR_TM GGRS89 Transverse Mercator

16 Hungary HU HU_HD-72 / EOV HD-72 Oblique Conformal Cylindric

17 Iceland IS IS_Hj1955 / UTM Hj1955 Transverse Mercator (UTM)

18 Ireland IE IE_Ireland75 / IrishNG Ireland75 Transverse Mercator

19 Italy IT IT_Roma 40 / East Roma 40 Transverse Mercator

IT IT_Roma 40 / West Roma 40 Transverse Mercator

IT IT_ED50 / UTM ED50 Transverse Mercator (UTM) 20 Latvia LV LV...

21 Lithuania LT LT_LKS94 / LT_TM LKS94 Transverse Mercator


# Country ID Coordinate Reference System(CRS) Identifier

Datum Projection

22 Luxembourg LU LU_LUREF / LU_Gauss LUREF Transverse Mercator

23 Macedonia(FYROM)

MK MK...

24 Netherlands NL NL_RD / DutchST RD Oblique Stereographic

25 Northern Ireland NI NI_Ireland 75 / IrishNG Ireland 75 Transverse Mercator

26 Norway NO NO_NGO48 / NGO NGO Transverse Mercator

27 Poland PL PL_EUREF89 / 1992 EUREF89 Transverse Mercator

PL PL_EUREF89 / 2000 EUREF89 Transverse Mercator

PL PL_42/58 / 1965 42/58 Oblique Stereogr. (Zone 1...4) / Transv.Mercator (Zone 5)

28 Portugal PT PT_Azo / UTM Azo Transverse Mercator (UTM)

PT PT_D73(84) / PT_Gauss D73(84) Transverse Mercator

PT PT_D73(89) / PT_Gauss D73(89) Transverse Mercator

PT PT_DLx(84) / Bonne DLx(84)

PT PT_DLx(84) / PT_Gauss DLx(84) Transverse Mercator

PT PT_DLx(89) / Bonne DLx(89)

PT PT_DLx(89) / PT_Gauss DLx(89) Transverse Mercator

PT PT_Mad / UTM Mad Transverse Mercator (UTM)

29 Romania RO RO_S42(84) / ..... S42(84)

RO RO_S42(89) / TM_6 S42(89) Transverse Mercator

RO RO_S42(89) / St1970 S42(89) Oblique Stereographic

30 Russia RU RU... Transverse Mercator

31 Slovak Republic SK SK_S-JTSK / JTSK_OCC JTSK Oblique Conformal Conic

32 Slovenia SI SI_SI / GK_3 Transverse Mercator (Gauss-Krüger-System)

33 Spain ES ES_ED50 / UTM ED50 Transverse Mercator (UTM)

34 Sweden SE SE_RT90 / SE_TM RT90 Transverse Mercator

35 Switzerland CH CH_CH1903 / CH_PROJECTION 1903 Oblique Conformal Cylindric

CH CH_CH1903+ / CH_PROJECTION 1903+ Oblique Conformal Cylindric

36 Turkey TR TR_ED50 / TR_TM ED50 Transverse Mercator

TR TR_ED50 / UTM ED50 Transverse Mercator (UTM)

37 Ukraine UA UA... Transverse Mercator

Map Projections in Europe

Albania Cyprus Austria Denmark Bulgaria Germany Finland Gibraltar Great Britain Iceland Greece Italy Ireland Malta Italy Norway Lithuania Portugal Luxembourg Spain Northern Ireland

Universal Transverse Mercator special United States specification of Transverse Mercator Projection - parameter world wide valid - used by NATO - de facto Standard

Turkey Norway Bulgaria Poland Croatia Portugal Germany Romania

Gauss-Krüger-System special German specification of Transverse Mercator Projection

Slovenia Russia Belgium Sweden Estonia Turkey

Lambert Conformal Conic

France Ukraine Czech Rep.

Oblique Conformal Conic Slovak Rep.

Hungary

Oblique Conformal Cylindric Switzerland

Netherlands Poland

Oblique Stereographic

Romania

Transverse Mercator (transversal, cylindrical, conformal)

Bonne Portugal


16.08.2001

Map Projections in Europe


change of coordinates from one coordinate reference system to another coordinate reference system based on a different datum through a one-to-one relationship

coordinates relatedto source CRS

with datum 1 andcoordinate system A

coordinatetransformatio

n

coordinates relatedto target CRS


2. Datum TransformationCoordinate Transformation


Operation identifier Country identifier Operation identifier

valid area scope source CRS identifier target CRS identifier version method name method name alias method formula method parameters number m method remarks m parameter name m parameter value m parameter remarks

Description of Transformations to ETRS89


Description of Transformation to ETRS89 — AT_MGI to ETRS89 Operation identifier AT_MGI to ETRS89

Country Austria

Country identifier AT

Operation valid area Austria

Operation scope for applications with an accuracy of about 1.5 m

Source coordinate reference system ID AT_MGI (X, Y, Z)

Target coordinate reference system ID ETRS89 (X, Y, Z)

Operation version 1996, 84 identical points

Operation method name 7 Parameter Helmert Transformation

Operation method name alias 3D similarity transformation

Operation method formula 7 Parameter Helmert Transformation, |X| |X| |Tx| | 0 -Rz Ry | |X| |X| |Y| = |Y| + |Ty| + | Rz 0 -Rx | * |Y| + D * |Y| |Z| |Z| |Tz| |-Ry Rx 0 | |Z| |Z| T S S S

T ... Target Datum S ... Source Datum Tx, Ty, Tz ... geocentric X/Y/Z translations [m] Rx Ry, Rz ... rotations around X/Y/Z axis [radian] D ... correction of scale [ppm]

- or see - ISO/CD 19111, Annex D, D3 Datum transformationen (1) - or - Boucher, C., Altamimi, Z. (1992): The EUREF Terrestrial Reference System and its First Realizations. Veröffentlichungen der Bayerischen Kommission für die Internationale Erdmessung, Heft 52, München 1992, pages 205-213 (2) - or - ftp://lareg.ensg.ign.fr/pub/euref/info/guidelines/ REF.FRAME.SPECIFV4 (3)

Operation method parameters numb. 7

Operation method remarks The three-dimensional coordinates of (X,Y,Z) of AT_MGI were derived under using ellipsoidal heights, which are computed from levelling heights related to Molo Sartorio (Trieste) and a Geoid related to AT_MGI Datum Hermannskogel and Josefstadt in Bohemia REMARK: for transformation the (ellip) coord. must refer all to Prime Meridian Greenwich

Operation parameter name geocentric X translation

Operation parameter value +577.3 m


Operation parameter name geocentric Y translation



Operation parameter name geocentric Z translation



Operation parameter name rotation X-axis

Operation parameter value +5.137"

Operation parameter remarks to be in agreement with formulas the rotation parameter has to be converted to Radians

Operation parameter name rotation Y-axis



Operation parameter name rotation Z-axis



Operation parameter name correction of scale

Operation parameter value +2.42 ppm



Formula of 7 Parameter Helmert (similarity) Transformation

(ISO19111)

(T) Target Datum

(S) Source Datum

T1, T2, T3 geocentric X/Y/Z translations [m]

R1, R2, R3 rotations around X/Y/Z axis [radian]

D correction of scale [ppm]

Remark: the rotations R1, R2, R3 must be small.

)S(12

13

23

3

2

1

)S()S(12

13

23

3

2

1

)S()(T1

1

1

0

0

0

Z

Y

X

DRR

RDR

RRD

T

T

T

Z

Y

X

D

Z

Y

X

RR

RR

RR

T

T

T

Z

Y

X

Z

Y

X


change of coordinatesfrom one coordinate system to another based on the same datumbased on a one-to-one relationship(including map projection)

coordinates relatedto source CRS


coordinateconversion

coordinates relatedto target CRS

with datum 1 andcoordinate system B

3. Coordinate Conversion and Map Projections


• 3D:– Cartesian: X, Y, Z – Ellipsoidal: , , h (Geodetic Coordinates)– Mapping: E, N, h– Spherical: R, , – Cylindrical: l, , Z

• 2D: – Geographic: , – Mapping: E, N

• Height system: H

o

P

Z

Y

X

Rz

Rcos cosOP Rcos sin Rsin

l cosOP l sin z

l

SphericalCylindrical

Coordinate Systems


c

b

a

Y

0 P´

Ph

Z

X

zero meridian central meridian

local meridian

0

P´

E

N

mapping ofthe centralmeridian

mapping of the local meridian

Section of Ellipsoid Plane of the Projection

Map projection


Datum 1

Coordinate System A

Datum 1

Coordinate System B

Datum 2

Coordinate System A

coordinatetransformation I

coordinateconversion

coordinatetransformation II(concatenated coordinate operations)

Coordinate conversion and coordinate transformation


4. Transformation of Grid Related InformationMost of the transformation/conversion cases in geodesy and geoinformation are related to point information (easy case of a one to one relationship).

In physical geodesy some processing procedures bases on mean values over near equal area grids/compartments (geoid determination by solution of a BVP with mean gravity anomalies and topographic heights)


The grid/compartment system is defined in a coordinate system (e.g. in ellipsoidal cs).

The coordinate system is related to the Earth by a datum. The information to be stored in a grid system are connected to the Earth.

Two cases of grid transformation:

- Change of the grid/compartment system (coordinate system)

- Change of the datum.

There are no problems with point related information.


In case of a change of the datum there are two possibilities change mean values:

1. Shift of the position of the grid/compartments on the Earth surface … it means the content/values of the compartments will be changed. The values of the boundaries of the compartments are fixed. (datum shift)

2. Fix the position of the compartment on the Earth surface … it means the content/values of the compartments will be fixed. The values of the boundaries of the compartments has to be changed by a datum transformation. (coordinate conversion)


Conclusion

Store all information as point information in ellipsoidal coordinates in ETRS89


• in cooperation of EUREF and EuroGeographics will be realised by Bundesamt für Kartographie und Geodäsie (BKG)

• will be the further development of the Information System for European Coordinate Reference Systems (CRS)

• Access at present for CRS: http://crs.ifag.de or Links from Hompages of BKG, EUREF, EuroGeographics

5. Realisation of a web-based Geodetic Information and Service System – GISS


Realisation of a web-based Geodetic Information and Service System – GISS (2)

• CRS contains at present for position– descriptions of national Coordinate Reference

Systems (CRS) of European countries– descriptions of pan-European CRS

(ETRS89)– descriptions of transformation parameters of

national CRS to pan-European CRS with an accuracy of 1...3 m

The information were provided from the National Mapping Agencies (NMA) and unified and prepared regarding ISO-Standard 19111.


Realisation of a web-based Geodetic Information and Service System – GISS (3)• further development

– upgrading for the gravity-related height component (in preparation – circular letter)

– generally information about CRS, Coordinates, Transformations, Map Projections etc.

– current separately existing Websites for projects of height reference systems http://evrs.leipzig.ifag.de (EVRS) will be included and updated

– upgrading for single point online transformation and conversion

– adding data for describing the Earth gravity field


CRSOverview

Description ofCRS

CRS Service

CRSCoordinate Reference System s

GeoidOverview

Description ofEuropean Geoid

Geoid ServiceCom putation of Geoid

undulations

GeoidGravity F ield

GISSGeodetic In form ation and

Service System


Structure



Sub-Structure of CRS

C R S -O ve rv iewgene ral in fo rm a tion

abou t C RS

C R S L inks

C R S -O verview

description ofpan -E u ropean C RS

reg ard ingIS O -S ta nda rd

descr. o f de fin itionsand p rojec ts of

pan -E u ropean C RS(E V R S , E T R S 89 , ...)

descrip tiono f C R S

fo r pos itio n and he ight

P a n -E uro p e an C RS

descrip tiono f C R S

pa ram e terw ith spec ified

accu ra cy

description of tra nsfo rm a tion s to

pan -E uropeanC R S

fo r pos itio n and he ight

N atio n a l C RS

C R S -Descrip tion

in te ra ctive coord ina tetrans form atio ns

na tiona l topan -E u ropean C RS

in te ra ctive coord ina teco nvers ion

C R S -S ervice


GISS - Online Transformation Position

national CRS ETRS89

North East

Latitude Longitude(ell. height)

XYZ

North East

Latitude Longitude(ell. height)

XYZ

Transformation

Conversion

Conversion

Conversion

Conversion


GISS - Online TransformationHeight

national CRS EVRF2000

Height Height

Transformation


6. Georeferencing for EuroGeographics projects(Contribution of ExG-G and EUREF to a ESDI- INSPIRE/ EuroSpec)

• Geodetic Components to Reference Data• Geodetic Control Stations (EPN, ECGN)• Geodetic Information and Service System (GISS)• Real Time Data Transfer for Global Navigation

Satellite Systems (NTRIP)• Validation and Certification of Geodetic

Information


Geodetic Information and Service System GISS

C R S -O ve rv iewge ne ral in fo rm a tion

ab ou t C RS

C R S L inks

C R S -O verview

de scription ofpa n -E u ropea n C RS

regard ingIS O -S ta nda rd

de scr. o f de fin itionsan d p rojec ts of

pa n -E u ropea n C RS(E V R S , E T R S 89 , ...)

de scrip tiono f C R S

fo r po s ition a nd he ig ht

P an -E uro p ean C RS

de scrip tiono f C R S

pa ram e terw ith spe c ified

accu ra cy

de scription of trans fo rm a tion s to

pa n -E uropeanC R S

fo r po s ition a nd he ig ht

N atio n a l C RS

C R S -De scrip tion

in te ra ctive coord in a tetra ns form atio ns

na tiona l topa n -E u ropea n C RS

in te ra ctive coord in a teco nvers ion

C R S F o rum

C R S -S ervice


GPS

Reference Station on the Internet

MobileIP

Network

ClientPDA

DGPS

Internet elsewhereGPRSMode

m

ServerPC

GNSS & Internet principle

Broadcaster

Networked Transport of RTCMvia Internet Protocol (Ntrip)


Data & services (Contribution of ExG-G and EUREF to ESDI)

EUREF stations

Web portal

EPN data

Densifications

Navigation, GNSS

Other services

Certification

User needs


The Transformation of coordinates, which refer to different geodetic datum and map projections, is a standard task for the referencing of geoinformation and one of the basic tasks of geodesy. Thereby we essentially fall back on point information. The transformation of information, which is dedicated to grids/compartiments, comes up to the physical geodesy.

Principles of transformation, conversion of coordinates and information transfer, that are dedicated to grids/compartiments, are being described and discussed.

eurogrid workshop oct.27-29, 2003, jrc, ispra. the european datum etrs89 and related map projections...

Documents