The Geohazards Exploitation Platform
This entry describes the services rendered by the Geohazards Exploitation Platform (GEP), a platform is specialized on the exploitation of Earth Observation in the context of the Geohazard Supersites & Natural Laboratories and CEOS Seismic Hazards and Volcanoes Pilots.
The Geohazards Exploitation Platform is expanding the capabilities of its precursor SSEP to address broader objectives of the geohazards community. The Geohazards Platform is sourced with elements – tools, data and processing – relevant to the geohazards theme, and has as a primary focus the mapping of hazard prone land surfaces and the monitoring of terrain deformation.
The CEOS Seismic Hazards Pilot and and the CEOS Volcanoes Pilot are both three-year demonstration projects of the Committee on Earth Observation Satellites to showcase how satellite EO can be applied to risk reduction and risk management in relation to geohazards.
Concerning ESA EO missions data, the GEP platform allows users to access and exploit large collections ENVISAT ASAR and ERS SAR data hosted in the ESA Research and Service Support Data Farm and in ESA’s Virtual Archive. Moreover, the platform will be used to access Sentinel-1A data.
The present document is intended to inform potential users of the services on the capabilities of the platform, the related support services and the terms and conditions applied.
The platform foresees a number of enhancements and validation phase in 2016/2017.
The document is organized along the following sections:
- Functional Scope
- Content Scope
- Service Support
- Terms and Conditions
The platform is meant to allow scientists to easily exploit EO data resources by combining fast data access, processing facilities and flexibility for the user own data analysis.
The platform develops in three main services:
1. EO Data Exploitation
2. New EO Service Development
3. New EO Product Development
EO Data Exploitation includes the possibility to perform catalogue queries, process and analise resulting products. Both catalogue query and data processing services can be accessed interactively through the GEP GeoBrowser (https://geohazards-tep.eo.esa.int/geobrowser/). In addition, data analysis tools, such as GAMMA, QuantumGIS and Sentinel Toolbox are made available GEP Cloud Dashboard (https://geohazards-tep.eo.esa.int/#!cloud).
New EO Service Development enables the scientific user to intergrate his own algorithm into the platform. User is provided with a Developer Sandbox, equipped with a set of tools to ease the integration of their algorithm (for data access, catalogue query, process tesing) and facilitate collaboration and software reuse, such as GitHub. The GEP Developer Sandbox can be started dynamically from the GEP Cloud Dashboard (https://geohazards-tep.eo.esa.int/#!cloud).
New EO Product Development enables the scientific user to perform massive processing within the platform, using the user integrated algorithm. Leveranging on the platform resources, the user can create systematically new high level EO products, such as eathquake risk maps, displacement maps, interpherograms pairs. The newly created High Level products can be then shared with the community, and will be searchable via the GEP Geo Browser (https://geohazards-tep.eo.esa.int/geobrowser/) as per the other results.
The platform is specialized for the exploitation of EO data resources in the context of the Geohazards community and therefore the platform has been sourced with the following contents:
SAR scenes (foreseen >150TB) related to Geohazards CEOS DRM Sites and some other areas of interest from ERS and ENVISAT. The data is available over the supersites below (for definitions of the terms see http://supersites.earthobservations.org/Supersites_Definitions_final.pdf):
Earthquake Supersites: Istanbul, Turkey; Tokyo, Japan; Los Angeles, USA; Vancouver and Seattle, Canada and USA
Volcano Supersites:Campi Flegreii and Vesuvius, Italy; Mt Etna, Italy; Hawaiian volcanoes, USA
Event Supersites: Tohoku-oki; Chile; Haiti; Wenchuan, China
Other Events - Significant earthquake or volcanic eruptions that affected less than one million people and therefor do not qualify as event Supersites: Van, Turkey; Baja California, Mexico; Yushu, China; Eyjafjallajökul, Iceland; L'Aquila, Italy
Detailed coverage maps (both spatial and temporal) are available on the Virtual Archive 4 Data Resources wiki page.
Moreover, GEP includes data from the Research and Service Support data farm, which is listed in the RSS Storage Data wiki page.
DIAPASON is an InSAR tool suite developed by the French Space Agency (CNES) and maintained by TRE ALTAMIRA INFORMATION. The DIAPASON based services perform an InSAR workflow on ENVISAT, ERS (RAW and SLC), Sentinel-1 (SLC) stripmap or Sentinel-1 TOPSAR (IW,EW) data, producing interferograms, amplitude and coherence maps.
The Next ESA SAR Toolbox (NEST) is an open source (GNU GPL) toolbox for reading, post-processing and analysing the large archive of data (from Level 1) from ESA SAR missions including ERS-1 & 2, ENVISAT. NEST service lets execution of a generic workflow (NEST graph), NEST Coregistration and NEST InSAR.
The Sentinel-1 Toolbox is an extension of the existing open source BEAM and NEST toolbox framework for the Sentinel-1 Mission data. S-1 Toolbox integrated processing service permits execution of a generic workflow (graph XML format).
The GAMMA SAR and Interferometry Software is a collection of programs that allows processing of SAR, interferometric SAR (InSAR) and differential interferometric SAR (DInSAR) data for airborne and spaceborne SAR systems. The integrated services based on GAMMA perform DInSAR (from ENVISAT L1) and image focusing (from ENVISAT L0)
The DInSAR Small BAseline Subsets (SBAS) algorithm has been developed by the scientists of (IREA-CNR) for monitoring temporal evolution of surface deformations. Processing service integrated performs analysis of long time-series to observe subsidence phenomena, map rapid deformations (e.g . earthquakes) and to characterize and monitor volcanic phenomena. The service can be also used to calculate interferograms stacks.
GMTSAR is an open source (GNU General Public License) InSAR processing system with several features: preprocessing of ERS and Envisat data, InSAR processing to focus and align stacks of images, map topography into phase, and form the complex interferogram. The integrated service produces, starting from L0 pairs, a set of interferograms, coherence maps and DEMs.
ESA operational L1 processor developed by MDA. Latest product specification at: ASAR Product Specification. This processor perform on-demand production of L1 products. Use of this processor may be necessary as most data available in the Geohazards platform is provided at Level 0 (raw data).
ESA operational L1 processor developed by MDA. This processor perform on-demand production of L1 products. Use of this processor may be necessary as most data available in Geohazards platform is provided at Level 0 (raw data).
ROI-PAC is a software for processing synthetic aperture radar data to produce differential interferograms. The integrated service produces, starting from L0 pairs, a set of interferograms and coherence maps.
StaMPS is a software package to extract ground displacements from time series of synthetic aperture radar (SAR) acquisitions. The original version was developed at Stanford University but subsequent development has taken place at the University of Iceland, Delft University of Technology and the University of Leeds. The integrated service performs, from L0 or L1, generation of interferograms, multi-temporal PSI and small-baseline analysis.
The Delft object-oriented radar interferometric software (Doris) generates interferometric products and end products such as Digital Elevation Models and displacement maps from Single Look Complex data. Doris integrated service produces, given L1 SLC pairs, a set of interferograms and coherence maps.
Data Analysis Tools
The Data Analysis tools are a set of Software-as-a-Service tools enabling users to perform their data exploitation activities. These tools offer the possibility to immediately elaborate the results with large flexibility and autonomy by using one or several virtual hosts directly provisioned on the Cloud platform where the data sits.
The GEP Platform provides a set of SaaS enabled tools within the so-called CloudToolbox image, which can be instatiated directly from the GEP Cloud Dashboard (https://geohazards-tep.eo.esa.int/#!cloud). The GEP CloudToolbox contains the following tools:
The New EO Service Development service provides scientific users with a development environment for processor integration and testing, the Developer Sandbox. The Developer Sandbox allows you to plug scientific applications written in a variety of languages (e.g. Java, C++, IDL, Python, R), then deploy, automate, manage and scale them in a very modular way.
The Developer Sandbox is instatiated within the platform as a dedicated Virtual Machine. The algorithm integration is performed within this machine, running initially as a simulation environment (sandbox mode) that can readily scale to production (cluster mode).
Access to an harmonized Shell environment, support tools and integration with GitHub facilitate the data access and workflow management tasks. The developed applications can become a new GEP processing service.
The New EO Product Development foreseen massive processing of EO data to derive high level products. This processing can be systematic (eg. performed every day, week, month or every time a new data is aquired) or one time.
Platform users will be supported through an ESA provide support and related support web site.
Platform support web site is available at: https://support.terradue.com/
Terms and Conditions
The data access service is available to all users registered with ESA at: http://eosupport.eo.esa.int/sso/registration.php
ESA does not take any responsability on the availability and performance of the PaaS services.