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Indra. Remote Sensing Systems DepartmentBrussels, 07-06-2011
Initial GMES Service forGeospatial Reference Data Access
2
INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
CONTENTS
00 About Indra
01 What is a DEM?
02 What do I need a DEM for?
03 DEM sources
04 Interoperability and availability issues
05 EU-DEM
06 Hydrography
3
INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
About Indra
The premier IT company in Spain and a leading IT multinational in Europe and Latam
31,000 professionals 110 countriesRevenues: M2,557€
Own solutions and technology
R+D+i: 7%-8% revenues
Differential business model based on Innovation
Among the 3 largest European IT services companies by market cap
4
INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
About Indra
10%
Tel
eco
m &
Med
ia
13%14%15%20%27%
Fin
anci
alS
ecto
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Hea
lth
& P
ub
licA
dm
inis
trat
ion
En
erg
y&
In
du
stry
Sec
uri
ty&
Def
ence
Command Control & Comms.
Aerial Defence
Electronic Warfare
Simulation
Homeland Security
(…)
Space
51%International
5
INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
About Indra
18 years experience in satellite ground
segment
Helios I & II
Pleiades
SMOS
SEOSAT & SEOSAR
METOP
Etc.
High level data processing and
dissemination systems
Civilian and Defence systems
Spatial Data Infrastructures
MoD exploitation systems
SAR data processing
Urban geoinformation management
Remote Sensingapplications and
services
GMES
R&D
Training
High volume cartographicproduction
Imagery supply
Advanced geoinformation
Certified developer forERDAS, ESRI, Intergraph
Consultancy and marketstudies
6
INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
CONTENTS
00 About Indra
01 What is a DEM?
02 What do I need a DEM for?
03 DEM sources
04 Interoperability and availability issues
05 EU-DEM
06 Hydrography
7
INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
A DEM can be defined as a digital statistic numeric representation of the land surface, using x, y, z point coordinates related to a known georreferenced axis system (Miller y Laflamme 1958).
What is a DEM?
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What is a DEM?
0
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
5 10 15 20 25 30 35 40 45 50
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What is a DEM?
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What is a DEM?
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What is a DEM?
0
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What is a DEM?
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What is a DEM?
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What is a DEM?
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What is a DEM?
0 5 10 15 20 25 30 35 40 45 50
0
5
10
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h=0
h=1
0.1
0.2
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h=0.5
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What is a DEM?
0 5 10 15 20 25 30 35 40 45 50
0
5
10
15
20
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30
35
40
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0.1
0.2
0.3
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What is a DEM?
0 5 10 15 20 25 30 35 40 45 500
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
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1
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What is a DEM?1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.002 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.004 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
5 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.006 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.00 0.00
7 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.02 0.02 0.02 0.02 0.02 0.02 0.02
8 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.02 0.03 0.04 0.05 0.05 0.05 0.05 0.05 0.05 0.059 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.09 0.10 0.09 0.09 0.08
10 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.04 0.05 0.07 0.09 0.10 0.12 0.13 0.14 0.14 0.15 0.14 0.14 0.1311 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.03 0.05 0.07 0.09 0.11 0.13 0.15 0.17 0.19 0.20 0.20 0.21 0.20 0.20 0.19
12 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.03 0.05 0.08 0.10 0.13 0.16 0.19 0.21 0.23 0.25 0.26 0.27 0.27 0.27 0.26 0.2513 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.03 0.06 0.08 0.11 0.15 0.18 0.21 0.24 0.27 0.30 0.32 0.33 0.34 0.35 0.34 0.33 0.32
14 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.03 0.05 0.08 0.12 0.15 0.19 0.23 0.27 0.31 0.34 0.37 0.39 0.41 0.42 0.42 0.42 0.41 0.39
15 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.05 0.08 0.11 0.15 0.20 0.24 0.29 0.33 0.37 0.41 0.44 0.47 0.48 0.50 0.50 0.50 0.48 0.4716 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.07 0.10 0.15 0.19 0.24 0.29 0.34 0.39 0.44 0.48 0.51 0.54 0.56 0.57 0.58 0.57 0.56 0.54
17 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.03 0.05 0.09 0.13 0.18 0.23 0.29 0.34 0.40 0.45 0.50 0.54 0.58 0.61 0.64 0.65 0.65 0.65 0.64 0.6118 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.07 0.11 0.16 0.21 0.27 0.33 0.39 0.45 0.51 0.56 0.61 0.65 0.68 0.71 0.72 0.73 0.72 0.71 0.68
19 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.05 0.09 0.13 0.19 0.24 0.31 0.37 0.44 0.50 0.56 0.62 0.67 0.71 0.75 0.77 0.79 0.79 0.79 0.77 0.7520 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.03 0.06 0.10 0.15 0.21 0.27 0.34 0.41 0.48 0.54 0.61 0.67 0.72 0.77 0.80 0.83 0.85 0.85 0.85 0.83 0.80
21 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.04 0.07 0.12 0.17 0.23 0.30 0.37 0.44 0.51 0.58 0.65 0.71 0.77 0.82 0.85 0.88 0.90 0.90 0.90 0.88 0.85
22 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.05 0.08 0.13 0.19 0.25 0.32 0.39 0.47 0.54 0.61 0.68 0.75 0.80 0.85 0.89 0.92 0.94 0.95 0.94 0.92 0.8923 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.05 0.09 0.14 0.20 0.26 0.33 0.41 0.48 0.56 0.64 0.71 0.77 0.83 0.88 0.92 0.95 0.97 0.98 0.97 0.95 0.92
24 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.05 0.09 0.14 0.20 0.27 0.34 0.42 0.50 0.57 0.65 0.72 0.79 0.85 0.90 0.94 0.97 0.99 0.99 0.99 0.97 0.9425 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.05 0.10 0.15 0.21 0.27 0.35 0.42 0.50 0.58 0.65 0.73 0.79 0.85 0.90 0.95 0.98 0.99 1.00 0.99 0.98 0.95
26 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.05 0.09 0.14 0.20 0.27 0.34 0.42 0.50 0.57 0.65 0.72 0.79 0.85 0.90 0.94 0.97 0.99 0.99 0.99 0.97 0.94
27 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.05 0.09 0.14 0.20 0.26 0.33 0.41 0.48 0.56 0.64 0.71 0.77 0.83 0.88 0.92 0.95 0.97 0.98 0.97 0.95 0.9228 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.05 0.08 0.13 0.19 0.25 0.32 0.39 0.47 0.54 0.61 0.68 0.75 0.80 0.85 0.89 0.92 0.94 0.95 0.94 0.92 0.89
29 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.04 0.07 0.12 0.17 0.23 0.30 0.37 0.44 0.51 0.58 0.65 0.71 0.77 0.82 0.85 0.88 0.90 0.90 0.90 0.88 0.8530 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.03 0.06 0.10 0.15 0.21 0.27 0.34 0.41 0.48 0.54 0.61 0.67 0.72 0.77 0.80 0.83 0.85 0.85 0.85 0.83 0.80
31 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.05 0.09 0.13 0.19 0.24 0.31 0.37 0.44 0.50 0.56 0.62 0.67 0.71 0.75 0.77 0.79 0.79 0.79 0.77 0.7532 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.07 0.11 0.16 0.21 0.27 0.33 0.39 0.45 0.51 0.56 0.61 0.65 0.68 0.71 0.72 0.73 0.72 0.71 0.68
33 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.03 0.05 0.09 0.13 0.18 0.23 0.29 0.34 0.40 0.45 0.50 0.54 0.58 0.61 0.64 0.65 0.65 0.65 0.64 0.61
34 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.04 0.07 0.10 0.15 0.19 0.24 0.29 0.34 0.39 0.44 0.48 0.51 0.54 0.56 0.57 0.58 0.57 0.56 0.5435 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.05 0.08 0.11 0.15 0.20 0.24 0.29 0.33 0.37 0.41 0.44 0.47 0.48 0.50 0.50 0.50 0.48 0.47
36 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.03 0.05 0.08 0.12 0.15 0.19 0.23 0.27 0.31 0.34 0.37 0.39 0.41 0.42 0.42 0.42 0.41 0.3937 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.03 0.06 0.08 0.11 0.15 0.18 0.21 0.24 0.27 0.30 0.32 0.33 0.34 0.35 0.34 0.33 0.32
38 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.02 0.03 0.05 0.08 0.10 0.13 0.16 0.19 0.21 0.23 0.25 0.26 0.27 0.27 0.27 0.26 0.2539 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.03 0.05 0.07 0.09 0.11 0.13 0.15 0.17 0.19 0.20 0.20 0.21 0.20 0.20 0.19
40 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.04 0.05 0.07 0.09 0.10 0.12 0.13 0.14 0.14 0.15 0.14 0.14 0.13
41 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.09 0.10 0.09 0.09 0.0842 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.02 0.02 0.03 0.04 0.05 0.05 0.05 0.05 0.05 0.05 0.05
43 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.02 0.02 0.02 0.02 0.02 0.02 0.0244 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.01 0.01 0.01 0.00 0.00
45 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0046 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0047 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
48 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.0049 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What is a DEM?
5 10 15 20 25 30 35 40 45 50
5
10
15
20
25
30
35
40
45
50
0.1
0.2
0.3
0.4
0.5
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0.7
0.8
0.9
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What is a DEM?
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
DEM features
DEM quality specification
Resolution or pixel size or posting
Vertical accuracy
Coverage
Format, datum and metadata
Spatial resolution Vertical accuracy (90%)DTED-1 90m x 90m <30mDTED-2 30m x 30m <18m
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
CONTENTS
00 About Indra
01 What is a DEM?
02 What do I need a DEM for?
03 DEM sources
04 Interoperability and availability issues
05 EU-DEM
06 Hydrography
23
INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What do I need a DEM for?
5 10 15 20 25 30 35 40 45 50
5
10
15
20
25
30
35
40
45
50
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What do I need a DEM for?
Accurate and interoperable cartography generation
Very High Resolution imagery processing
Satellite imagery acquisition planning
3D scenario generation
Viewshed and Route Intervisibility
Trafficability analysis; route analysis
Flight simulation
UAV flight planning
3D Mission planning
Ballistic trajectory determination and tracking
Flooding risk mapping
etc
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What do I need a DEM for?
3D terrain visualization
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What do I need a DEM for?
3D terrain visualization
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What do I need a DEM for?
3D terrain visualization
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What do I need a DEM for?
Cartographic production from airborne and satellite images
A DEM is required to generate an accurate map out of a satellite image. Else…
Image can be poorly geolocated (absolute location error up to a few hundred metres)
Image can have severe deformations (case of radar imagery)
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What do I need a DEM for?
Putting the satellite image into adequate coordinates
X,Y
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What do I need a DEM for?
Providing map coordinates and projection for every pixel in the satellite image
X,Y
+
4º 55’ 60” N52º 19’ 60” W
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What do I need a DEM for?
Providing map coordinates and projection for every pixel in the satellite image: the image undergoes deformations
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What do I need a DEM for?
Having an accurate DEM is critical to have accurate maps
a = Actual distanceb = Distance assuming flat Earth (no topography)
Satellite / camera
Error=b-a
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What do I need a DEM for?
Examples from Google Earth
Error=13m
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
What do I need a DEM for?
Range
Easting
Azimut
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
CONTENTS
00 About Indra
01 What is a DEM?
02 What do I need a DEM for?
03 DEM sources
04 Interoperability and availability issues
05 EU-DEM
06 Hydrography
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
DEM sources
LIDAR – Laser scanner
Airborne / satellite stereo images
Synthetic Aperture Radar Interferometry
From Lidar: Using an airborne laser device. It emits a laser pulse and it receive the bounce and user the time between emit and bounce to calculate the height in a point.
From radar. Using airborne or spaceborne intereferometry / radargrammetry
From Stereo Flight or Satellite with Stereo Capacity: combining images taken from different angles to create 3D stereo effect
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
DEM availability
Public Global scale (nearly full Earth coverage)
GTOPO 30 30 arc seconds (900m) resolution.
SRTM 90m resolution
ASTER 30m resolution
Commercial products from multiple vendors
Variable coverage and resolution
Technologies:
Satellite optical imagery
Airborne photogrammetry
Synthetic Aperture Radar (SAR): Insar / Radargrammetry
LIDAR
38
INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
CONTENTS
00 About Indra
01 What is a DEM?
02 What do I need a DEM for?
03 DEM sources
04 Interoperability and availability issues
05 EU-DEM
06 Hydrography
39
INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
DEM interoperability and availability issues
010
2030
4050
0
20
40
600
0.2
0.4
0.6
0.8
1
PR of WesternBananastan
PR of EasternBananastan
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
DEM interoperability and availability issues
5 10 15 20 25
5
10
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505 30 35 40 45 50
PR of EasternBananastan
PR of WesternBananastan
The ideal situation but…
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
DEM interoperability and availability issues
5
10
15
20
25
30
35
40
45
5 30 35 40 45 50
PR of EasternBananastan
PR of WesternBananastan
DEMs are displaced and they do not match in the border (location error)
5 10 15 20 2550
Error
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
DEM interoperability and availability issues
5 30 35 40 45 50
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
PR of EasternBananastan
10 20 30 40 50
10
20
30
40
50
60
70
80
90
100
PR of WesternBananastan
DEMs are of different resolution
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS
DEM interoperability and availability issues
5 30 35 40 45 50
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
PR of EasternBananastan
10 20 30 40 50
10
20
30
40
50
60
70
80
90
100
PR of WesternBananastan
h=1,0h=1,1
h=0,1h=0,0
DEMs have different reference height (datum)
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DEM interoperability and availability issues
PR of EasternBananastan
PR of WesternBananastan
DEMs have different projection
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DEM interoperability and availability issues
PR of EasternBananastan
PR of WesternBananastan
A resampling is needed…
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PR of WesternBananastan
There is no DEM!
PR of EasternBananastan
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PR of WesternBananastan
We are foreced to use a “global DEM”…
PR of EasternBananastan
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DEM interoperability and availability issues
Western Bananastan
Eastern Bananastan
SouthernBananastan
Pinenastan
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The DEM has to be considered an infrastructure
The same way as the maps, the DEM is an infrastructure that if made available it can result in a boom of downstream applications
Satellite imagery production centres working with Defence(Helios, Pleiades, Cosmo Skymed, SARLupe, etc.) or commercial satellites (SPOT-5, Ikonos, GeoEye, etc.) need DEMs
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CONTENTS
00 About Indra
01 What is a DEM?
02 What do I need a DEM for?
03 DEM sources
04 Interoperability and availability issues
05 EU-DEM
06 Hydrography
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EU-DEM
Many GMES applications are requiring a DEM
A seamless DEM for Europe
Which DEM to use?
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EU-DEM
Requirements
30m pixel
+/- 7m height accuracy
Fulfilling Land Mapping and Emergency Response Servides (LMCS and ERCS)
Solution
ASTER GDEM based
SRTM for accuracy improvement -> Manual Edition
Access to NEXTMap 1 arcsec for LMCS
Access to NEXTMap 0,15 arcsec for ERCS
Ownership of EU-DEM by EC
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Service Definition
Product Coverage Data Sources
Resolution Vertical Accuracy
Access
LMCS
EU-DEM EEA38 SRTM & ASTER
1 arc-second +/- 7.0 metres RMSE
Unrestricted
NEXTMap Enhanced EU-DEM
20 Western EU countries
NEXTMap
Europe DTM
1 arc-second (resampled from 0.15 arc-second)
+/- 1.0 metre RMSE
Restricted as per End User License Agreement
ERCS
NEXTMap Europe DTM Core Product
20 Western EU countries
NEXTMap
Europe
0.15 arc-second +/- 1.0 metre RMSE
Restricted as per End User License Agreement
(30m)New!
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Production Methodology - Intermap
1. Data Preparation
• Aligning input data (NEXTMap®, GDEM ASTER, …)
• Pilot area definition (2° x 2°)
• Total of 1,165 tiles (1°)
NEXTMap
SRTM
GDEM
60°N
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Production Methodology - Intermap
2. Processing Steps
• ASTER GDEM void masking
• Horizontal/Vertical shift correction
• Gap filling
• Flattening water bodies
• Documenting
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Production Methodology - Intermap
ASTER GDEM harmonisation with NEXTMAP DTM
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Production Methodology - Intermap
• Edge matching of EU-DEM & NEXTMap Enhanced EU-DEM
• Editing of blunders and water features in 3D stereo environment using QCed water layer provided by AGI
GDEM
NEXTMap ASTER „mole runs“
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Production Methodology - Intermap
3. Final Data QC & Validation
• Vertical accuracy checks using available reference data (LiDAR, VCPs, etc.)
• Tiles review for adherence to product specifications
• Validate adherence to edit rules
• Reports
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CONTENTS
00 About Indra
01 What is a DEM?
02 What do I need a DEM for?
03 DEM sources
04 Interoperability and availability issues
05 EU-DEM
06 Hydrography
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Hydrography
Requirements
1:100.000 scale
Support for WISE applications
Relation with ECRINS and ERM (INSPIRE) current hydrological models
Solution
Extraction of water bodies from IMAGE2006 (based on SPOT/IRS data)
Delineation of river lines on top of IMAGE2006
Reference material: ECRINS, Topographic maps, Google Earth, etc.
Generation of river network topology
Integration / cross check with EU-DEM
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Production Methodology – HYDROGRAPHY (AGI)
1. Data Preparation
Download IMAGE 2006/2009 Transformation to production-ready CRS and formatsCreation of satellite imagery database and spatial index for easy search and preview of the available scenesSelection of the best available imagery for production:
– Early-to-mid-summer season– Cloud-free coverage (<5%)
Mosaicking of identified image “batches” (same date)Selecting replacements for patching areas not suitable for production (clouds/shadows, snow/ice, etc.)Acquisition of the ancillary datasets:
– GEONAMES (toponyms)
– Euro-Regional Map (1:150,000)– National datasets (if available)
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IMAGE 2006 NDVI
REFLECTANCE WATER
3. Data Processing
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INITIAL GMES SERVICE for GEOSPATIAL REFERENCE DATA ACCESS4. Data Editing & Harmonization
Accuracy – up to 10 mAutomatic cleanup of coverages
100% inspection for artefacts
QC – 20% of all objects
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Watersheds and sub-watersheds
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Production Coordination
Requirements
Integration of water bodies with EU-DEM
Assignment of node heights based on EU-DEM
Ensuring rivers flowing down for river polygons
Solution
Production workflow
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EU-HYDRO / EU-DEM overlay
PRODUCTION SEQUENCE
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EU-HYDRO / EU-DEM overlay
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Access to EU-DEM and EU-HYDRO services
Requirements
Services based on open standards
Fulfilling INSPIRE requirements
Client Showcase (web based viewer)
Solution
Final hosting site to be defined
Metadata schema implementing INSPIRE rules for every theme
Base services implemented with open source software
Metadata is GeoNetwork compliant
Implementation of WMS/WCS/WFS standards with GeoServer / GeoWebCache
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Project Status
• Hydrographic layer content already defined: tables, attributes, metadata, etc.
• EUDEM layer features already defined
• Two Prototype areas produced for testing purposes
• Production started for water bodies (more than 45% tiles in external QC for EU-DEM “burning”)
• Access System and Client Showcase already developed.
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Project Plan
• EU-DEM planned to be finished by Oct. 2011
• Hydrographic layers to be finished by mid 2012
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Client Showcase – web based viewer
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Client Showcase – web based viewer
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Daniel CarrascoAntonio GarzónJosé Antonio RedondoRemote Sensing Systems [email protected]