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DIVA-GIS is a free computer program for mapping and geographic data analysis (a geographic information system (GIS). With DIVA-GIS you can make maps of the world, or of a very small area, using, for example, state boundaries, rivers, a satellite image, and the locations of sites where an animal species was observed. We also provide free spatial data for the whole world that you can use in DIVA-GIS or other programs

GIS MGRS datalayers in GIS format

provides pointers to GIS companies, associations, and government web pages as well as sources of software, data, publications, and services

R.T. Wilson has as a PhD student working in Remote Sensing and GIS, spent a lot of time looking for free datasets. All of the datasets below are free to use for academic and non-profit work, and don't require any special academic registration, although most of them ask you to cite their papers/website.

The Joint Board of Geospatial Information Societies (JB GIS) is a coalition of leading international geospatial societies which can speak on behalf of the geospatial profession at international level, especially to the United Nations and other global stakeholders. Its second goal is to coordinate activities within the geospatial society and organisations

This the coordination webportal from UN OCHA for all Humanitarian Response, inclusive cross cutting issues ( gender, environmental) , , age), funding, access to crisispages, access to global cluster approach and resources ( like common GIS datasets)

THis is the replacement for the former OneRespons webportal

Blog about Crisis Mapping , crowdsourcing, new media, tools A lot of links to SMS and GIS programs so the tool tab

Find Interactive Maps, GIS datasets, Satellite Imagery and Related Applications

GDACS is a cooperation framework under the United Nations umbrella. It includes disaster managers and disaster information systems worldwide and aims at filling the information and coordination gap in the first phase after major disasters. GDACS provides real-time access to web‐based disaster information systems and related coordination tools

This map is updated monthly and was last updated March 2013. This map service is designed to be used as a basemap and as a reference map. The map service includes administrative boundaries, cities, water features, physiographic features, parks, landmarks, highways, roads, railways, airports, and buildings overlaid on land cover and shaded relief for added context.

Human health is profoundly affected by weather and climate. Extreme weather events kill tens of thousands of people every year and undermine the physical and psychological health of millions. Droughts directly affect nutrition and the incidence of diseases associated with malnutrition. Floods and cyclones can trigger outbreaks of infectious diseases and damage hospitals and other health infrastructure, overwhelming health services just when they are needed most.

This site is a platform for sharing data in response to early warnings about increased food insecurity in the Sahel region of West Africa. The platform allows regional and international organizations to share and visualize their data describing the situation in the Sahel. By pulling together data sources into one site, the platform offers the ability to strengthen data sharing between partners and donors. A common operating picture is critical for a coordinated response, and this platform helps bring together critical datasets to inform the response. All datasets are offered in both raw data formats and processed map layers. Map layers are retrieved and integrated into the site using API calls from each partner. This allows the seamless data sharing between partners into a single site while keeping data ownership decentralized. Data and APIs are publicly available for download and use. All maps are powered by MapBox Hosting. This site is built using a public Github repository.

My Community, Our Earth was created in the year 2002 through public and private partnerships, in preparation for the World Summit for Sustainable Development (WSSD) in Johannesburg, South Africa, to address sustainable development issues, including biodiversity, climate change, poverty eradication, fresh water supply, and urbanization. We approach the theme of sustainable development using a geographic perspective that allows innovative responses to local community challenges

The WMO is a specialized agency of the United Nations. It is the UN system's authoritative voice on the state and behaviour of the Earth's atmosphere, its interaction with the oceans, the climate it produces and the resulting distribution of water resources

UN statistical database with currently 33 databases on all topics inclusive weather