Useful links

Satellite Image Catalogues

e-GEOS is the world-wide Exclusive Data Distributor for COSMO-SkyMed Data & Products.

The COSMO-SkyMed system is a constellation of four radar satellites for Earth observation for dual (civil and military) use. Its purpose is to monitor the globe for the sake of emergency prevention (management of environmental risks), strategy (defence and national security), and scientific and commercial purposes, providing data on a global scale.

TerraSAR-X Catalogue

TerraSAR-X Image Products can be acquired in different image modes with flexible resolutions and scene sizes. Thanks to different polarimetric combinations and processing levels the delivered imagery can be processed into different products and services meeting the requirements of a broad variety of applications.

Sentinels Scientific Data Hub

The Sentinels Scientific Data Hub is an ESA online portal web based system designed to provide EO data users with distributed mirror archives and bulk dissemination capabilities for the Sentinel-1 products. The Sentinel Data Hub makes Sentinel data available to individuals and entities worldwide.

The portal allows the searching for Sentinel data and the download of Sentinel data, selected by the user.

Sentinel Amazon Public Image Browser

Sentinel-2 data is available for anyone via Amazon S3, either over Internet or within AWS. All Sentinel-2 scenes are made available, often within hours of production. Each file is its own object in Amazon S3.

The data are organised per tiles using the Military Grid System (latest KML file).

JAXA Globe Portal

AUIG2 is an online service, related to ALOS-2 (Advanced Land Observing Satellite-2) and ALOS (Advanced Land Observing Satellite), which helps to use various services.ALOS-2 and ALOS related information can be browsed, and observation data can also be searched and ordered using AUIG2.

JAXA Globe Portal (Beta)

Globe Portal System (G-Portal ) is a online dissemination service of valuable products acquired from sensors on Earth Observation Satellites of Japan Aerospace Exploration Agency (hereafter, JAXA). All you can use the service to cross-search products from JAXA's many earth observation satellites and sensors, and registered users can acquire products. Data is provided via the internet/an online environment.

SAOCOM Catalogue (CoNAE) (ESA)

From ESA Catalogue, data is available from external Third Party Mission site. On the basis of an agreement with the Agenzia Spaziale Italiana (ASI), data are available through the ASI SAOCOM Data Hub upon user membership request and registration as described at ASI SAOCOM main page.

UNAVCO SAR Archive

University NAVSTAR Consortium (UNAVCO) is an organization of universities who support scientific research using geodesy technology. Flooding, plate tectonics, earthquakes – our world is all connected. UNAVCO promotes research by providing access to geodesy data.

Researchers interested in obtaining SAR data from the UNAVCO SAR archive must apply for SAR data access, and those interested in obtaining SAR data from Supersites must register with ESA as described at Supersites.

National Earth Observation Data Framework Catalogue (NEODF-Cat)

This framework was designed to facilitate the discovery, access and delivery of the Government of Canada Earth Observation (EO) image products, derived products and further value-added EO products. The NEODF-Cat enables public and government users to intelligently search and easily access the GoC EO raw and product archives managed by NRCan. The search capability features advanced geospatial "Region of interest" (ROI) operators, high-quality Quicklook images, and tools to manage queries and archive access.

USGS Catalogue

EarthExplorer (http://earthexplorer.usgs.gov) provides online search, browse display, metadata export, and data download for earth science data from the archives of the U.S. Geological Survey (USGS). EarthExplorer provides an enhanced user interface using state-of-the art JavaScript libraries, Hypertext Preprocessor (PHP), and the advanced Oracle spatial engine.

GloVis

Global Visualization Viewer: The Global Visualization Viewer (GloVis) trifold provides basic information for online access to a subset of satellite and aerial photography collections from the U.S. Geological Survey Earth Resources Observation and Science (EROS) Center archive. The GloVis browser-based utility allows users to search and download National Aerial Photography Program (NAPP), National High Altitude Photography (NHAP), Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), Earth Observing-1 (EO-1), Global Land Survey, Moderate Resolution Imaging Spectroradiometer (MODIS), and TerraLook data.

LAADS Web

LAADS is an online archive of MODIS, MAS, VIIRS, MERIS data products. Products are currently available via FTP, web order, or with web services. The FTP portal is via anonymous FTP to machine "ladsweb.nascom.nasa.gov". Web ordering supports product selection, subsetting and special processing.

EOSDIS

The Earth Observing System Data and Information System (EOSDIS) is a key core capability in NASA’s Earth Science Data Systems Program. It provides end-to-end capabilities for managing NASA’s Earth science data from various sources – satellites, aircraft, field measurements, and various other programs. For the EOS satellite missions, EOSDIS provides capabilities for command and control, scheduling, data capture and initial (Level 0) processing. These capabilities, constituting the EOSDIS Mission Operations, are managed by the Earth Science Mission Operations (ESMO) Project.

EOSDIS (Rapid Response & LANCE)

Rapid Response, then known as the MODIS Land Rapid Response System, was made possible through the collaboration between staff at NASA Goddard Space Flight Center (GSFC), the Department of Geography at the University of Maryland and the USFS Remote Sensing Applications Center (RSAC). By 2007, the Rapid Response System was producing data globally and had incorporated data and imagery from the MODIS instrument on the Aqua satellite.

EOLi

EOLi (Earth Observation Link) is the European Space Agency's client for Earth Observation Catalogue and Ordering Services. Using EOLi, you can browse the metadata and preview images of Earth Observation data acquired by the satellites: Envisat, ERS, Landsat, IKONOS, DMC, ALOS, SPOT, Kompsat, Proba, IRS, SCISAT.

INPE

China Brazil Earth Resources Satellites CBERS-2 & CBERS-2B image catalogue (National Institute For Space Research (Brazil).

The access to the Catalog is entirely free. Images download require user register.

Digital Globe Image Finder

QuickBird, WorldView-1, WorldView-2, WorldView-3, IKONOS, GeoEye-1

AVIRIS Data Portal

AVIRIS Data Portal (2006 - Present)

BlackBridge EyeFind

RapidEye image catalogue.

NOAA CLASS

The Comprehensive Large Array-data Stewardship System (CLASS) is an electronic library of NOAA environmental data. This web site provides capabilities for finding and obtaining those data. CLASS is NOAA's premiere on-line facility for the distribution of NOAA and US Department of Defense (DoD) Polar-orbiting Operational Environmental Satellite (POES) data, NOAA's Geostationary Operational Environmental Satellite (GOES) data, and derived data.

Bhuvan Indian Geo-Platform of ISRO

Facilitates the user to select, browse and download the Earth observation data of ISRO IRS satellites.

Vertex ASF's Data Portal

Vertex is the Alaska Satellite Facility’s data portal for remotely sensed imagery of the Earth (UAVSAR , ALOS PALSAR, RADARSAT-1, ERS-1, ERS-2, JERS-1, AIRSAR, SEASAT, AIRMOSS, Sentinel-1A).

Global LandCover Facility

The Global Land Cover Facility (GLCF) provides earth science data and products to help everyone to better understand global environmental systems. In particular, the GLCF develops and distributes remotely sensed satellite data and products that explain land cover from the local to global scales.

VITO Vision

PROBA-V, SPOT-Vegetation and METOP free satellite imagery.

Earth Observation Satellites & Sensors

The CEOS Database: This database is updated annually based on a survey of CEOS member space agencies and has a number of applications.

Cosmo-Skymed: (handbook) (sample products) (calibration)

PRISMA (Hyperspectral Mission)

TerraSAR-X: (handbook) (sample products)

ALOS: (handbook) (sample products)

ALOS-2: (handbook) (sample products) (calibration)

Radarsat-1: (handbook) (sample products)

Radarsat-2: (handbook) (sample products)

Landsat 8: (handbook)

Landsat 9: (handbook)

Sentinel Missions

Sentinel 1 - SAR (technical guide) (handbook)

Sentinel 2 - MSI (S2 L1C Tiling Grid)

Sentinel 3 - OLCI

Sentinel 3 - SLSTR

Sentinel 3 - Synergy

Digital Globe Constellation: (sample products)

Envisat: (handbook) (sample products1 / sample products2)

AGI Satellite Viewer

Sentinel 3 - Altimetry

Digital Elevation Models

TIN Italy: A seamless digital elevation model (DEM) of the whole Italian territory, originally named TINITALY/01 (also known as the "TINITALY" DEM, in short), was presented in 2007 (Tarquini et al. 2007*). The dataset is about the elevation of the bare ground, and thus it can be called a DTM (Digital Terrain Model). This DEM was obtained starting from separate DEMs of single administrative regions of Italy. The DEM is freely available as a 10 m-cell size grid (in GeoTIFF format), in the UTM WGS 84 zone 32 projection system

Sardegna Geoportale

World SRTM 90: The SRTM 90m DEM’s have a resolution of 90m at the equator, and are provided in mosaiced 5 deg x 5 deg tiles for easy download and use. All are produced from a seamless dataset to allow easy mosaicing. These are available in both ArcInfo ASCII and GeoTiff format to facilitate their ease of use in a variety of image processing and GIS applications. Data can be downloaded using a browser or accessed directly from the ftp site.

World SRTM 30: Previously, SRTM data for regions outside the United States were sampled for public release at 3 arc-seconds, which is 1/1200th of a degree of latitude and longitude, or about 90 meters (295 feet). The new data are being released with a 1 arc-second, or about 30 meters (98 feet), sampling that reveals the full resolution of the original measurements. Data for most of Africa and its surrounding areas were released with the September 2014 announcement. The next release, in November 2014 included all of South America and North America, most of Europe, and islands in the eastern Pacific Ocean. The most recent release, in January 2015 includes most of continental Asia (now including India), the East Indies, Australia, New Zealand, and islands of the western Pacific.

World ETOPO1: ETOPO1 is a 1 arc-minute global relief model of Earth's surface that integrates land topography and ocean bathymetry. It was built from numerous global and regional data sets, and is available in "Ice Surface" (top of Antarctic and Greenland ice sheets) and "Bedrock" (base of the ice sheets) versions. Historic ETOPO2v2 and ETOPO5 global relief grids are deprecated but still available.

Spatial datasets

DIVA-GIS. Free spatial country level data for any country in the world: administrative boundaries, roads, railroads, altitude, land cover, population density.

GDAM (Global Administrative Areas): GADM is a spatial database of the location of the world's administrative areas (or adminstrative boundaries) for use in GIS and similar software. Administrative areas in this database are countries and lower level subdivisions such as provinces or departments.

GEOFABRIK: Derived data from the OpenStreetMap dataset available for free download.

osm-x-tractor: Free OpenStreetMap geodata in Shapefile and CSV formats. (Buildings, Highways, Landuse, Places, Natural, Vegetation, Hydrography, Points Of Interest)

Map Library: The Map Library is a source of public domain basic map data concerning administrative boundaries in Africa. The data is broken down into manageable chunks to make it easier to download for those with poor internet connections.

MAIS-SINAnet: Network of the National Environmental Information System (Italy) . SINAnet ISPRA (Istituto Superiore per la Protezione e la Ricerca Ambientale).

Environmental Data Explorer: The Environmental Data Explorer is the authoritative source for data sets used by UNEP and its partners in the Global Environment Outlook (GEO) report and other integrated environment assessments. Its online database holds more than 500 different variables, as national, subregional, regional and global statistics or as geospatial data sets (maps), covering themes like Freshwater, Population, Forests, Emissions, Climate, Disasters, Health and GDP. Display them on-the-fly as maps, graphs, data tables or download the data in different formats.

Natural Earth: Natural Earth is a public domain map dataset available at 1:10m, 1:50m, and 1:110 million scales. Featuring tightly integrated vector and raster data, with Natural Earth you can make a variety of visually pleasing, well-crafted maps with cartography or GIS software.

MapSPAM: Using a variety of inputs, SPAM uses a cross-entropy approach to make plausible estimates of crop distribution within disaggregated units.Moving the data from coarser units such as countries and subnational provinces, to finer units such as grid cells, reveals spatial patterns of crop performance, creating a global gridscape at the confluence between geography and agricultural production systems.

ECMWF Data Server: The ERA-Interim archve at European Centre for Medium-Range Weather Forecasts is a global atmospheric reanalysis from 1979, continuously updated in real time.ERA-Interim products and the data server are normally updated once per month, allowing a two-month delay for quality assurance and for correcting technical problems with the production, if any. Consult the ERA-Interim archive document for a full description of available parameters.

Humanitarian Data Exchange: The Humanitarian Data Exchange or HDX Is an open platform for sharing data. The goal of HDX is to make humanitarian data easy to find and use for analysis. Launched in July 2014, HDX has been accessed by users in over 200 countries and territories.

COPERNICUS SERVICES

Copernicus is a European system for monitoring the Earth. Data is collected by different sources, including Earth observation satellites and in-situ sensors. The data is processed and provides reliable and up-to-date information about six thematic areas: land, marine, atmosphere, climate change, emergency management and security. (http://www.copernicus.eu/)

Marine Environment Monitoring Service: Marine data is an engine for “smart and sustainable growth” in the European Union, as stated in the recent Marine Knowledge 2020 EC Communication. The Copernicus Marine Service has been designed to respond to issues emerging in the environmental, business and scientific sectors.Using information from both satellite and in situ observations, it provides state-of-the-art analyses and forecasts daily, which offer an unprecedented capability to observe, understand and anticipate marine environment events. The CMEMS provides regular and systematic core reference information on the state of the physical oceans and regional seas. The observations and forecasts produced by the service support all marine applications.

Land Monitoring Service: This service is divided into four main components: *The Global Land Service provides a series of bio-geophysical products on the status and evolution of the land surface at global scale at mid and low spatial resolution. *The pan-European component provides information about the land cover and land use (LC/LU), land cover and land use changes and land cover characteristics. *The local component focuses on different hotspots, i.e. areas that are prone to specific environmental challenges and problems. *The in-situ component: all of the Copernicus services need access to in-situ data in order to ensure an efficient and effective use of Copernicus space-borne data. Next to data provided by participating countries, Earth observation from space also yields pan-European reference datasets, such as a Digital Elevation Model.

Atmosphere Monitoring Service: The Copernicus Atmosphere Monitoring Service (CAMS) brought together partner organisations from across Europe with expertise in areas such as environmetal monitoring and forecasting, operational forecasting services, and research of atmospheric composition. CAMS delivers services as *Daily production of near-real-time European air quality analyses and forecasts with a multi-model ensemble system, *Solar and UV radiation products supporting the planning, monitoring, and efficiency improvements of solar energy production and providing quantitative information on UV irradiance for downstream applications related to health and ecosystems, and *Anthropogenic emissions for the global and European domains and global emissions from wildfires and biomass burning, among others.

Software resources

Image Processing

ENVI: ENVI (an acronym for "ENvironment for Visualizing Images") is a software application used to process and analyze geospatial imagery. It is commonly used by remote sensing professionals and image analysts. ENVI bundles together a number of scientific algorithms for image processing a lot of which are contained in automated, wizard-based approach that walks users through complex tasks.

Nest (Next ESA Sar Toolbox): The Next ESA SAR Toolbox (NEST) is an ESA open source toolbox under the GNU GPL licence for reading, processing, analysing and visualising ESA (ERS-1/2, ENVISAT, SENTINEL-1) and other spaceborne* (TerraSAR-X, RADARSAT 1-2, COSMO-SkyMed, JERS-1, ALOS PALSAR) SAR data processed to Level-1 or higher.

Sentinel Toolboxes: ESA is developing free open source toolboxes for the scientific exploitation of the Sentinel missions. This work is funded through the "Scientific Exploitation of Operational Missions (SEOM)", a new program element of ESA's fourth period of the Earth Observation Envelope Programme (EOEP-4). The toolboxes are inheriting functionality of historical toolboxes developed over the last 10 years and support also a range of National and Third Party Missions. The toolboxes have been conceived to host new functionalities developed by the scientific community in the future. In addition the toolboxes have been specified to be portable on a cloud infrastructure. The toolboxes will be also widely used for training next generation scientists to the scientific exploitation of Sentinel data and multi-mission data.

Beam: BEAM is an open-source toolbox and development platform for viewing, analysing and processing of remote sensing raster data. Originally developed to facilitate the utilisation of image data from ENVISAT's optical instruments, BEAM now supports a growing number of other raster data formats such as GEOTIFF and netCDF as well as data formats of other EO sensors such as MODIS, AVHRR, AVNIR, PRISM and CHRIS/PROBA. Various data and algorithms are supported by dedicated extension plug-ins. BEAM includes Reader API for SENTINEL products: SENTINEL-2 MSI Level-1B, Level-1C, Level-2A products; SENTINEL-3 SLSTR Level-1B and Level-2 products; SENTINEL-3 OLCI Level-1B and Level-2 products; and SENTINEL-3 SYN Level-1C, Level-2, VGT P and S products.

PolSARpro: The Polarimetric SAR Data Processing and Educational Tool aims to facilitate the accessibility and exploitation of multi-polarised SAR datasets including those from ESA Third Party Missions (ALOS PALSAR), Envisat ASAR Alternating Polarisation mode products, RADARSAT-2 and TerraSAR-X. A wide-ranging tutorial and comprehensive documentation provide a grounding in polarimetry and polarimetric interferometry necessary to stimulate research and development of scientific applications that utilise such techniques; the toolbox of processing functions offers users the capability to implement them.

Map Ready: The MapReady Remote Sensing Tool Kit accepts level 1 detected SAR data, single look complex SAR data, and optical data from ASF and some other facilities. It can terrain correct, geocode, apply polarimetric decompositions to multi-pol SAR data, and save to several common imagery formats including GeoTIFF. Other software included in the package are an image viewer, metadata viewer, a projection coordinate converter, and a variety of command line tools.

SARScape: SARscape is a modular set of functions supporting processing of SAR Intensity images, Interferometric SAR Processing, Polarimetric SAR (PolSAR) Processing, and Polarimetric-Interferometric SAR (PolInSAR) Processing, and dedicated to the generation of products based on spaceborne and airbone SAR data. SARscape supports following spaceborne SAR sensors :ERS-1 and 2 SAR, JERS-1 SAR, RADARSAT-1 and 2, ENVISAT ASAR, ALOS PALSAR-1, SAR Lupe, TerraSAR X-1 and 2, COSMO-SkyMed-1-2-3-4, RISAT-1, Sentinel-1, and ALOS-2. And following airborne SAR systems: OrbiSAR-1 (X- and P-band), E-SAR (P,L,C,X-band), RAMSES (P,L,S,C,X,Ku,Ka,W-band), TELAER (X-band) and UAV SAR in Stanag format.

JAXA Let's SAR: Let's SAR is a simple tool package to use SAR data such as ALOS PALSAR mosaics for forest classification, change detection, and other major applications. The aim of the tool is providing the first step in the use of SAR to more people and expanding the utilization of SAR data.

NASA World Wind: World Wind is an open-source (released under the NOSA license) virtual globe first developed by NASA in 2003 for use on personal computers and then further developed in concert with the open source community since 2004. The latest Java-based version (2.0), was released in April 2014. World Wind.NET provided the ability to browse maps and geospatial data on the internet using the OGC's WMS servers (version 1.4 also uses WFS for downloading place names), import ESRI shapefiles and kml/kmz files. Other features of World Wind.NET included support for .X (DirectX 3D polygon mesh) models and advanced visual effects such as atmospheric scattering or sun shading.

Satellite Swath Planner

SAVOIR: SaVoir was developed originally for the European Space Agency to support operations of the International Charter for Space and Major Disasters (the Charter). The scope was to provide an easy to use tool to quickly identify potential acquisition opportunities over any area of interest and with any satellite and sensor combination, thus speeding the efforts in data ordering for disaster relief. STK: is a free 2D and 3D modeling environment used by engineers, mission analysts, operators and decision-makers from more than 700 global organizations to model complex systems (such as aircraft, satellites, ground vehicles and their sensors) to evaluate their performance in real or simulated time. OREKIT: Orekit aims at providing accurate and efficient low level components for the development of flight dynamics applications. It is designed to be easily used in very different contexts, from quick studies up to critical operations.As a library, Orekit provides basic elements (orbits, dates, attitude, frames, ...) and various algorithms to handle them (conversions, propagations, pointing, ...). Orekit is freely available both in source and binary formats, with all related documentation and tests.

Programming / Data Manipulation

Python: is an interpreted, object-oriented, high-level programming language with dynamic semantics. Its high-level built in data structures, combined with dynamic typing and dynamic binding, make it very attractive for Rapid Application Development, as well as for use as a scripting or glue language to connect existing components together. Python's simple, easy to learn syntax emphasizes readability and therefore reduces the cost of program maintenance. Python supports modules and packages, which encourages program modularity and code reuse. The Python interpreter and the extensive standard library are available in source or binary form without charge for all major platforms, and can be freely distributed.

Python Extension Packages (Unofficial Windows Binaries for Python Extension Packages): 32- and 64-bit Windows binaries of many scientific open-source extension packages for the official CPython distribution of the Python programming language.

GDAL (Geospatial Data Abstraction Library): is a translator library for raster and vector geospatial data formats that is released under an X/MIT style Open Source license by the Open Source Geospatial Foundation. As a library, it presents a single raster abstract data model and vector abstract data model to the calling application for all supported formats. It also comes with a variety of useful commandline utilities for data translation and processing.

Matlab: is a multi-paradigm numerical computing environment and fourth-generation programming language. Developed by MathWorks, MATLAB allows matrix manipulations, plotting of functions and data, implementation of algorithms, creation of user interfaces, and interfacing with programs written in other languages, including C, C++, Java, Fortran and Python.

Octave: GNU Octave is a high-level interpreted language, primarily intended for numerical computations. It provides capabilities for the numerical solution of linear and nonlinear problems, and for performing other numerical experiments. It also provides extensive graphics capabilities for data visualization and manipulation. Octave is normally used through its interactive command line interface, but it can also be used to write non-interactive programs. The Octave language is quite similar to Matlab so that most programs are easily portable.

IDL: IDL is a flexible and extensible visualization, analysis, and development environment that easily integrates with the other software tools you use. IDL provides a host of ways to import code and functionality from other programming languages and advanced methods for exporting IDL capabilities to your applications written in other languages.

Statistics

SPSS: IBM SPSS Statistics is a computer application that supports statistical analysis of data. It allows for in-depth data access and preparation, analytical reporting, graphics and modelling. IBM SPSS Statistics is a part of larger collection of IBM’s analytics software which also includes: IBM SPSS Data Collection, IBM SPSS Modeler, IBM Analytical Decision Management, IBM SPSS Analytic Catalyst.

R-Project: R is a language and environment for statistical computing and graphics. It is a GNU project which is similar to the S language and environment which was developed at Bell Laboratories (formerly AT&T, now Lucent Technologies) by John Chambers and colleagues. R provides a wide variety of statistical (linear and nonlinear modelling, classical statistical tests, time-series analysis, classification, clustering, ...) and graphical techniques, and is highly extensible. One of R's strengths is the ease with which well-designed publication-quality plots can be produced, including mathematical symbols and formulae where needed. Great care has been taken over the defaults for the minor design choices in graphics, but the user retains full control.

Spatial Databases

PostgreSQL / PostGIS: PostgreSQL is a general purpose and object-relational database management system. PostgreSQL is free and open source software. Its source code is available under PostgreSQL licence, a liberal open source licence. PostGIS is a spatial database extender for PostgreSQL object-relational database. It adds support for geographic objects allowing location queries to be run in SQL.

MySQL: MySQL, is a popular Open Source SQL database management system, developed, distributed, and supported by Oracle Corporation. The MySQL Database Software is a client/server system that consists of a multi-threaded SQL server that supports different backends, several different client programs and libraries, administrative tools, and a wide range of application programming interfaces (APIs).

Geographic Information Systems

QGis: QGIS is an Open Source Geographic Information System. The project was born in May of 2002 and was established as a project on SourceForge in June of the same year. We’ve worked hard to make GIS software (which is traditionally expensive proprietary software) a viable prospect for anyone with basic access to a personal computer. QGIS currently runs on most Unix platforms, Windows, and OS X. QGIS is developed using the Qt toolkit (http://qt.digia.com) and C++. This means that QGIS feels snappy and has a pleasing, easy-to-use graphical user interface (GUI).

GVSig: A powerful, user-friendly, interoperable GIS used by thousands of users worldwide. It is easy to work in a variety of formats with gvSIG Desktop, vector and raster files, databases and remote services. There are always available all kinds of tools to analyze and manage your geographic information. gvSIG Desktop is designed to be an easily extensible solution, allowing thus continually improving the software application and developing tailor made solutions. Is an open source software, GNU / GPL license, this makes its free use, distribution, study and improvement.

Arcgis: Is a geographic information system (GIS) for working with maps and geographic information. It is used for: creating and using maps; compiling geographic data; analyzing mapped information; sharing and discovering geographic information; using maps and geographic information in a range of applications; and managing geographic information in a database. The system provides an infrastructure for making maps and geographic information available throughout an organization, across a community, and openly on the Web.

Udig: uDig is an open source (EPL and BSD) desktop application framework, built with Eclipse Rich Client (RCP) technology.

uDig can be used as a stand-alone application.
uDig can be extended with RCP “plug-ins”.
uDig can be used as a plug-in in an existing RCP application.

Spring: Is a GIS and remote sensing image processing system with an object-oriented data model which provides for the integration of raster and vector data representations in a single environment. SPRING is a product of Brazil's National Institute for Space Research (INPE/DPI Image Processing Division).

GRASS: GRASS GIS, commonly referred to as GRASS (Geographic Resources Analysis Support System), is a free and open source Geographic Information System (GIS) software suite used for geospatial data management and analysis, image processing, graphics and maps production, spatial modeling, and visualization. GRASS GIS is currently used in academic and commercial settings around the world, as well as by many governmental agencies and environmental consulting companies. It is a founding member of the Open Source Geospatial Foundation (OSGeo).

Space Agencies