various uses : training set for MEDDE and CEREMA users, integration in a processing chain (OTB, ogr & gdal application), thematic (land cover for city planning, coastline monitoring, hasards flood), Dominique HEBRARD

1. June 2015 – Hackfest OTB - Toulouse
CENTRE FOR EXPERTISE AND ENGINEERING
ON RISKS, URBAN AND COUNTRY PLANNING,
ENVIRONMENT AND MOBILITY
Satellite Application Pole - MEDDE
DOMINIQUE HEBRARD – GILLES FOUVET
A GROWING COMPETENCE IN A
COLLABORATIVE ENVIRONMENT
USING ORFEO TOOLBOX

2. June 2015 – Hackfest OTB - Toulouse
Who are we ? Context and aims
Usage of OTB
Example of studies and tools
FeedBack
of CEREMA's team
Presentation
Outline
Presentation
Outline

3. June 2015 – Hackfest OTB - Toulouse
Who are we ?
Context and aims
Who are we ?
Context and aims

4. Date_Titre de la présentation
Satellite Application Pole
INSTITU-
TIONAL
SERVICES
DG, DREAL
DRAAF, DDT
CEREMA, Local
authorities…
INSTITU-
TIONAL
SERVICES
DG, DREAL
DRAAF, DDT
CEREMA, Local
authorities…
SATELLITE POLE
Located in CEREMA
SATELLITE POLE
Located in CEREMA
Transmission potential user's needsTransmission potential user's needs
Promotion of satellite applications
technical support and services
Promotion of satellite applications
technical support and services
Partnership and projectsPartnership and projects
EARTH OBSERVATION ACTIVITY :
INTEGRATING IN A PERTINENT AND USEFUL UTILISATION OF
SATELLITE IMAGES IN THE INSTITUTIONAL SERVICES
EARTH OBSERVATION ACTIVITY :
INTEGRATING IN A PERTINENT AND USEFUL UTILISATION OF
SATELLITE IMAGES IN THE INSTITUTIONAL SERVICES
TECHNICAL
ACTORS IN
SATELLITE
APPLICATIONS
Laboratories,
CNES, ESA
Service providers,
companies…
TECHNICAL
ACTORS IN
SATELLITE
APPLICATIONS
Laboratories,
CNES, ESA
Service providers,
companies…

5. June 2015 – Hackfest OTB - Toulouse
French Policies About Software
Convergence towards free software
Administrative circular of the Prime Minister -
September 2012
Usage of free software in the French administration :
- added value for the users
- cost control,
- adaptability,
- ….
Two examples :
- Mimo : list of free office software
- Qgis becomes the main GIS software in MEDDE
active and great community in the services

6. June 2015 – Hackfest OTB - Toulouse
Stakes and Aims
From research to development and democratization
Specifications and targets:
- GIS specialist CEREMA, MEDDE, local authorities (non specialist
in remote sensing)
- skills transfer
- reproducibility (software, methodology, training)
- Potentially widespread in the services (products or tools)
- Training (pedagogical suitcase)

7. June 2015 – Hackfest OTB - Toulouse
Training (pedagogical suitcase)
Module 1 : (1 day)
- Awarness and acculturation,
- What can we do with satelitte images ? Where can you get them ?
- targets : GIS engeneers and technicians, and project manager in
charge of public policies
Module 2 : (3 days)
- Basic raster manipulations
- Basic classifcations (thresholding) and index (NDVI,etc..)
- supervised classification

8. June 2015 – Hackfest OTB - Toulouse
Usage of OTBUsage of OTB

9. June 2015 – Hackfest OTB - Toulouse
USAGES OF OTB
Are we users or developers ?
For the GIS users :
We are developers and specilized in remote sensing
For the developers :
We are end-users
So :
We are using OTB application

10. USAGES OF OTB
OTB application - a bridge between GUI users and CLI users for
automatization
OTB
applications
OTB
applications CLI
Command Line Interface
CLI
Command Line Interface
GUI
Graphical User Interface
GUI
Graphical User Interface
Script
few lines : loops
Script
few lines : loops
Processing chain
6000 lines
Processing chain
6000 lines
Monteverdi 2.0Monteverdi 2.0
QGIS 2.0
sextante
QGIS 2.0
sextante
SpatiaLiteSpatiaLite

11. June 2015 – Hackfest OTB - Toulouse
Example of studies
and
tools
Example of studies
and
tools

12. June 2015 – Hackfest OTB - Toulouse
What the users mainly need ?
The example of Land Cover:
- evaluation for territory planning policies :
➢ anthropisation, natural lands, agricultural land:
minimum each 3 years
➢ urban density
- very low cost
- stability of the method
The needs are quite simple, the answer a little bit less!

13. June 2015 – Hackfest OTB - Toulouse
Study led in CEREMA
✔ Various topics and studies : always linked with public policies in the fields
of territory planning, natural and industrial hasards or environment
✔ Various images : Pléiades, Rapideye, Spot 6, Spot 5, sentinelle 2 ?, …
✔ Different needs, so several methods
✔ Numerous orders from the users : demonstrator to test on their territories
✔ Strong need of human ressource optimization, led us to automatization
strategy

14. June 2015 – Hackfest OTB - Toulouse
Processing chain : Satellite Application Pole
Born in 2012
- first need of automatization
V 1.0 end of 2013
- 90% tasks automatization (scripts Python, OTB, spatialite, gdal)
V 1.x road map 2014
- increase computing performance
- improve ergonomy, stability and maintenance
V 2.0 road map 2015
- cutting the chain in several application modules
- command line interface via argument parser
- integration methodology evolutions
- computation time optimization
- hypervisor
V 2.x road map 2016
- hypervisor
- GUI ?

15. Processing
chain
Exemple
step 1

16. Processing
chain
Exemple
step 2

17. Processing
Chain :
Software
architecture

18. June 2015 – Hackfest OTB - Toulouse
Processing chain : Satellite Application Pole
BuiltDifference.py: # otbcli_BandMath, otbcli_BinaryMorphologicalOperation, otbcli_Superimpose, otbcli_Rasterization
ChannelsConcatenation.py: # otbcli_BandMath, otbcli_ConcatenateImages, otbcli_ComputeImagesStatistics, otbcli_DimensionalityReduction
ClassReallocationRaster.py: # otbcli_BandMath
DataBaseSuperposition.py: # otbcli_BandMath, otbcli_Rasterization
ImageCompression.py: # otbcli_BandMath, otbcli_ConcatenateImages
KmeansMaskApplication.py: # otbcli_BandMath, otbcli_KMeansClassification
MacroSamplesCreation.py: # otbcli_BandMath
MacroSamplesAmelioration.py:# otbcli_BandMath, otbcli_BinaryMorphologicalOperation
MajorityFilter.py: # otbcli_ClassificationMapRegularization
MaskCreation.py: # otbcli_BandMath, otbcli_Rasterization
MicroClassesFusion.py: # otbcli_BandMath
NeoChannelsComputation.py: # otbcli_BandMath, otbcli_HaralickTextureExtraction, otbcli_SplitImage
QualityIndicatorComputation.py:# otb otbcli_ComputeConfusionMatrix
SupervisedClassification.py: # otbcli_ComputeImagesStatistics, otbcli_TrainImagesClassifier, otbcli_ImageClassifier
Vectorization.py: # otbcli_band_math, otbcli_mean_shift_smoothing, otbcli_lsms_segmentation,
otbcli_lsms_small_regions_merging, otbcli_lsms_vectorization

19. June 2015 – Hackfest OTB - Toulouse
Exemple of result
✔ Bordeaux Métropole
✔ 4 Pléiades couples images
✔ 4 DTS Digital Terrain Surface
✔ Evaluation of urban density
Work station
✔ CPU : xeon E5-2620 2,1 GHz
✔ Memory : 12 Go + 12 Go swap
Computation time :
✔ 300 hours

20. June 2015 – Hackfest OTB - Toulouse
FeedBack
of CEREMA's team
FeedBack
of CEREMA's team

21. June 2015 – Hackfest OTB - Toulouse
Feedback
Before comming, we meet each member of our 10 guys staff and interviewed
them.
✔ BUG : we have made a list but we are unforgivable : we did not feed the
Mantis
✔ Propositions of enhancement : ergonomics, calculation performance, new
applications, enhacement of existing applications, otb applications in
french,…
✔ need to complete documentation (in french, more examples and
recepies,...)
✔ Outlook : OTB can be an integrated tool ? After classification, post-
treatments (polygonization), opportunity for methodolgy sharing (forum,
wiki, howto, tutorial,...)

22. June 2015 – Hackfest OTB - Toulouse
CENTRE FOR EXPERTISE AND ENGINEERING
ON RISKS, URBAN AND COUNTRY PLANNING,
ENVIRONMENT AND MOBILITY
Dominique HEBRARD
dominique.hebrard@cerema.fr
Gilles FOUVET
gilles.fouvet@cerema.fr
Thank you for your attention.