A Spatial Reference System (by co-ordinates) for Europe
description
Transcript of A Spatial Reference System (by co-ordinates) for Europe
![Page 1: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/1.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 1
AASpatial Reference SystemSpatial Reference System
(by co-ordinates)(by co-ordinates)for Europefor Europe
![Page 2: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/2.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 2
topicstopics
Reference systems : a reminder Transformation and conversion Spatial Reference System Workshop
: a 1999 SAI/MEGRIN initiative Spatial Reference System for Europe
: recommendations
![Page 3: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/3.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 3
? egg or grapefruit ?? egg or grapefruit ?
do we live on the same planet??
….why different spatial reference systems?
![Page 4: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/4.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 4
geo-referencing by geo-referencing by co-ordinatesco-ordinates
datum(physical)
coordinate system(m athematical)
coordinate reference system
indirectreference system
position
![Page 5: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/5.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 5
geodeticgeodetic datum datum Z
X
Y
![Page 6: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/6.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 6
map coordinatesmap coordinates
E
N
![Page 7: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/7.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 7
ellipsoïd to planellipsoïd to plan
h
E
N
![Page 8: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/8.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 8
heightsheights
geoid
earth surface
ellipsoid
h
N
H
![Page 9: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/9.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 9
change of systemchange of systemDatum 1
N, E, (h)
X, Y, Z
, (h)
N, E, (h)
X, Y, Z
, (h)
Datum 2
transformation
conversion
conversion
![Page 10: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/10.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 10
why different systems (1)?why different systems (1)?
geoid
earth surface
ellipsoid
![Page 11: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/11.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 11
why different systems (2)?why different systems (2)?
![Page 12: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/12.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 12
issuesissues Conversion
– mathematical – exact (exception : N)
Transformation– empirical– precision depending on measurements
All changes– time-consuming– risks of errors, discrepancies
![Page 13: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/13.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 13
problems...problems...
Limitless and ever expanding list of ’systems’ (national, regional, local)
Increasing needs for large amount of data to be processed ‘on-the-fly’
What specification to include in the CEC call for tenders ?
Etc ...
![Page 14: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/14.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 14
… … and solutionsand solutions
SAI / MEGRIN Expert Workshop– Marne la Vallée, 29-30/11/99
15 participants– CEC (JRC, DG13, EUROSTAT)– EEA, EUROCONTROL, MEGRIN, EUROGI– Geodesy Experts : EUREF, ISO, CEN, OGC,
CERCO, etc..
![Page 15: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/15.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 15
1- the European system 1- the European system already exists for the expertsalready exists for the experts
ITRS : the global reference European Continental Plate moves
uniformly ~3cm per year
![Page 16: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/16.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 16
5 cm /year
ITR F93
NNR-NUV EL1A
![Page 17: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/17.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 17
1- the European system 1- the European system already exists for the expertsalready exists for the experts
ITRS : the global reference European Continental Plate moves
uniformly ~3cm per year The EUREF sub-Commission of IAG ETRS89
– stable – shift to global ITRS known (and WGS84)– transfo. parameters known for most
European countries!
![Page 18: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/18.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 18
2- recommendations2- recommendations No map projection suitable for all pan-
European applications Geo-referenced co-ordinates for the CEC
would be geographic co-ordinates () on ETRS89
NMAs to place 1~2 m. accuracy transformation algorithms in public domain
EUREF/CERCO to collect and manage high accuracy transformations
![Page 19: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/19.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 19
3- heights3- heights
nationally defined heights may differ by several dm. (2.3 m. for Belgium)
![Page 20: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/20.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 20
![Page 21: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/21.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 21
3- heights3- heights
nationally defined heights may differ by several dm. (2.3 m. for Belgium)
no uniform European height system available yet
EULN in preparation by EUREF/EUVN Recommendation : that the CEC adopts
the EUVN results when made available
![Page 22: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/22.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 22
ConclusionsConclusions
interoperability and integration of data interoperability and integration of data from different sources still a key issuefrom different sources still a key issue
co-ordinate interoperability is an easily co-ordinate interoperability is an easily overcome obstacle:overcome obstacle:– recommend implementation of the existing recommend implementation of the existing
common reference systems (ETRS89, EULN)common reference systems (ETRS89, EULN)– distribute ‘validated’ transformation toolsdistribute ‘validated’ transformation tools
![Page 23: A Spatial Reference System (by co-ordinates) for Europe](https://reader035.fdocuments.us/reader035/viewer/2022062222/56814b05550346895db81b93/html5/thumbnails/23.jpg)
6th
EC
-GIS
, 28-
30 J
un 2
000,
Lyo
n, F
ranc
e6t
h E
C-G
IS, 2
8-30
Jun
200
0, L
yon,
Fra
nce
A Spatial Reference System for Europe 23
proceedings edited by JRC/SAI
also available at
http://www.megrin.orghttp://www.megrin.org