Miami-Dade County Information Technology Department's Geographic Information Systems (GIS) website, where residents and visitors can find information about the County's GIS developments and activities.
With the Metadata Explorer, you can search, browse, and download data from the Florida Geographic Data Library (FGDL), a mechanism for distributing spatial (GIS) data throughout the state of Florida. The FGDL is warehoused and maintained at the University of Florida's GeoPlan Center.
The Department of Economic Opportunity (DEO) - Bureau of Labor Market Statistics (LMS) manages various geographic information systems (GIS) datasets, applications, GIS & static maps and resources used to provide labor market information (LMI).
The American Community Survey (ACS) is conducted by the US Census and sent to a portion of the population every year. Data USA does not contain the entire ACS dataset but instead relavent topics to the curated profile pages of the site. As of the 2014 (most recent) ACS release there are 1 year and 5 year estimates.
Electronic copies of USGS Topographic Maps from the last 125 years. Provided in GeoPDF format, which isn’t great for importing into GIS software, but apparently can be converted to GeoTIFF in the latest version of GDAL
Various coastal DEMs of the USA at various resolutions. Whole US coastline combining bathymetry and land elevation out to the end of the continental slope is available at 3 arc-second resolution, and various areas available at higher resolution.
All raw data contained in the National Altas is available for downloading including everything from agricultural census data, presidential election results, airports, railways, glaciers, arsenic content in groundwater, and much more.
Detailed geological maps with extended attribute data for each of the US states. To download data select the state, then the area, then click the reference link at the bottom. Scroll down to the bottom and the files are available for download.
These "groundwater watch" web pages group related wells and data from these active well networks, and provide basic statistics about the water-level data collected by USGS water science centers for Cooperative Programs, for Federal Programs, and from data supplied to us by our customers through cooperative agreements.
The most complete map ever produced of vegetative associations for the US. Land cover is classified in to 551 Ecological Systems and 32 Modified Ecological Systems (areas where human impacts have affected the ecology). Available for download as ARC GRID or ERDAS IMAGE.
This portal is intended to serve a community of GIS users interested in climate change. The free datasets of climate change projections can be downloaded as a shapefile, a text file, or as an image. Many 2D variables from modeled projected climate are available for the atmosphere and land surface.
A comprehensive data source on the environmental characteristics (air emissions, resource mix, net generation and more) of all electrical power sources in USA. Each record contains location information, allowing use in GIS.
Maps of various factors relating to energy use in the USA, the most relevant of which is the USA and world-wide geological maps. To download, view the web map, then click on the dropdown box labelled MORE and scroll to the Download GIS data option.
Economic and demographic information for areas around fixed transit station in the US. Available at three levels – 1/2 mile buffer around station, aggregated transit zones, transit regions. Registration required
Airport, airline and route data across the globe. Data is provided as CSV files which can be easily processed to produce GIS outputs. Data includes all known airports, and a large number of routes betwen airports.
For Earth observers seeking remotely sensed data, the USGS Earth Explorer is your sole destination. USGS’s new Earth Explorer gives you access to one of the largest databases of satellite and aerial imagery. A friendly user-interface makes accessing data simple. It even has a bulk download application. Register for a free account because this is the ultimate database for free remote sensing data.
NASA’s Socioeconomic Data and Applications Center (SEDAC) provides valuable geographic information to learn about human interactions in the environment. SEDAC had a wide variety of coarse global free GIS data – from fertilizer applications in agriculture to global infant mortality rate by state/province.
The United Nations Environmental Data Explorer’s online database holds more than 500 different variables. Freshwater, population, forests, emissions, climate, disasters, health and GDP spatial and non-spatial data.
FAO GeoNetwork provides satellite imagery and spatial data to support sustainable development in agriculture, fisheries and food security. The GIS Gateway is where you can find data organized categorically.
NASA’s Earth Observations (NEO) is focused on providing global satellite imagery as accessible as possible. Imagine seeing daily snapshots of climate and environmental conditions of Earth. Over 50 different global datasets are represented with NASA’s Earth observations.
DIVA-GIS has some free GIS datasets for any country in the world. From A to Z, find the most common cultural free GIS data – boundaries, railways, roads, etc. Select the country and theme, then download with ease. When it comes to biodiversity (species occurrence) and crop collection data, DIVA-GIS is also particularly useful.
The Sanborn Fire Insurance Maps Online Checklist provides a searchable database of the fire insurance maps published by the Sanborn Map Company housed in the collections of the Geography and Map Division. The online checklist is based upon the Library's 1981 publication Fire Insurance Maps in the Library of Congress and will be continually updated to reflect new acquisitions.
The historical map collection has over 76,000 maps and images online. The collection includes rare 16th through 21st century maps of America, North America, South America, Europe, Asia, Africa, Pacific and the World.You can georeference using an online tool the map that you need.
Antarctic Digital Database: Compilation of medium-scale topographic data for Antarctica, managed by the British Antarctic Survey. Registration required
Quantarctica: A huge set of Antarctic datasets, including basemaps, elevation, satellite imagery, glaciology and geophysical data. Provided in a 7Gb package with QGIS, all set up for viewing, or available through FTP for individual datasets.
US Antarctic Resource Centre: Scanned topographic maps, LiDAR-derived DEMs at approx 5m resolution and some aerial photography. Click the links on the left to select different datasets
Geoscience Australia: Australian Government GIS data site, including a lots of free data such as topographic maps, geological data, hydrological maps and more.
Australian Government Data: Data from the Australian Government's OpenData programme, including soil, climate and census data. This link shows only data available as shapefiles. Click the KML link to show KML data instead.
Queensland GIS service: Data from the government of Queensland including biodiversity, pests, census data and more.
Brazil Geosciences Products: Wide range of datasets for Brazil, including basemaps, administrative boundaries and land use. You may need a bit of Portuguese knowledge to use the site, and some maps are only available in PDF format. Many are available as Shapefiles in the directories whose names end with SHAPE.In Portugeuese
GeoGratis: A wide range of free datasets covering Canada including population, Landsat mosaics, land capability, hydrology and radar data - as well as many others.
Canada OpenData: A wide range of open data, including lots of geographic data. All data from GeoGratis (above) is gradually being migrated to this platform.
Toporama: Simplified raster versions of the standard National Topographic Survey maps at 1:50,000 and 1:250,000.
Canada Road Network File: Canada's national road network as shapefile data with information including street names, types, directions and address ranges.
Canadian Soil Information Service: Soil maps for the whole of Canada available for download in GIS formats (mainly shapefiles with associated attribute data). Includes lots of metadata and process/methodology information.
British Colombia Digital Geology Map: Detailed geological maps for the province of British Colombia, available in shapefile and PDF formats. Data from 2005 and a beta version from 2011.
DataBC: Various free and open datasets from the government of British Columbia *(to find geographic datasets, follow links to the catalogue, and then choose Geospatial Dataset under Resource Types)*
Timor-Leste GIS Portal: Wide range of datasets for East Timor, including infrastructure, natural environment, road networks, base maps, elevation and more.
National Land Survey of Finland: A wide range of data including general topographic maps (1:1,000,000 and 1:4,500,000), administrative divisions, elevations and place names and orthophotos for Finland. (For bulk download, in Finnish, try here
Helsinki data: Geographic data in a wide range of categories - both raster and vector - for Helsinki
HELCOM Baltic sea data: Baltic Marine Environment Protection Commission (Helsinki Commission) data on the whole Baltic sea area including biodiversity, environmental monitoring, pollution and more.
IGN: Free GIS data for France including relief, drainage, boundaries, raster maps and coastline. In French
ParisData: Open Data for Paris, including lots of georeferenced data. In French
Coastal Orthophotos: Orthophotos over the whole of the French coast available for download. In French
NIBIS GIS: German GIS aggregation service allowing you to display and download various maps of Germany.
German Postal Areas: Vector polygons of German postal areas (similar to zip code or postcode areas). In German
Greece Open Geodata: The Greek government's open GeoData portal, with a wide range of datasets.
Gateway to Indian Earth Observation: A range of Earth Observation-derived data for India including NDVI, ocean temperature and CartoDEM (a DEM for the whole of India at 30m resolution). Registration required
LINZ Topographic Maps: Freely available raster copies of Land Information New Zealand topographic maps at 1:50,000 and 1:250,000 scales. Equivalent of Ordnance Survey maps for New Zealand.
LINZ Data Service: A new service by Land Information New Zealand. Topographic, hydrographic, survey, titles and geodetic datasets are freely accessible with more LINZ datasets added over time. Aerial photographs for the whole of New Zealand have recently been added.
Koordinates: GIS data aggregation site which focuses especially on New Zealand. It includes data in a number of categories such as elevation, environment, climate etc. Mostly vector, but some raster. Registration required
LRIS Data Portal: GIS data for New Zealand from Landcare Research, focussing on soil and environmental data and including 25m-resolution DEMs of North and South Island.
Norweigan Land Cover: Various datasets concerning land resources in Norway provided by the Norwegian Landscape and Forest Institute, including land type, forest, tree species and site index with a scale from 1:5000 to 1:250000.
Papa New Guinea
Coastline: 1:50,000 coastline of Papa New Guinea, in MapInfo format. Derived from Landsat data.
GeoCatMin: Wide range of geodata for Peru including administrative boundaries, geomorphology, geology, hydrology, satellite images and more.
GIS Data Clearinghouse: Various datasets relating to the Philippines including boundaries, DEMs, rainfall, and river data.
Portugese Web Atlas: Many datasets including physical geography data (temperature, wind, geology, seismic data, ecology, soils), human geography data (tourism, population, services), protected areas and detailed data on the Azores and Madeira. Also has a small amount of data on Angola and Mozambique.
Portugese Water Atlas: Huge amount of data on everything related to water in Portugal - basins, river networks, bathymetry and so on.
Geology of Puerto Rico: Detailed geological maps in vector format, with extended attribute information. From USGS.
Ministry of Environment SIA: Vector data focussing on water resources (lakes, reservoirs, rivers, watersheds, wetlands, environmental protection areas, polluants etc) but also including regions, populated places etc. In Spanish
SwissTopo: Data from the Swiss National Mapping Agency including boundaries, 1:1 million vector maps, Landsat images, geological maps and a map of Switzerland during the last glacial maximum.
Swiss Geoportal: The Geoportal of the Swiss Confederation - with some data available directly and others via links to other sites.
United Kingdom (UK)
OS OpenData: Many Ordnance Survey mapping products available in both vector and raster formats. Resolutions from 1:250k to 1:10k as well as detailed gazateers, boundary datasets and post-code point locations. Now also includes topologically correct road and river networks, and more detailed topographic map data.
ShareGeo Open: Directory of free GIS data for the UK, easily searchable - includes wide range of data including boundaries, national parks, contours, archeological sites and much more.
MAGIC Datastore: A wide range of datasets for the UK including boundaries, pipelines, urban areas, health and safety and more. Many entries in the database are links to other sites and some require registration.
New Popular Edition OS Maps: Scans of many of the (out-of-copyright) New Popular Edition OS maps from the 1940s and 1950s. Available to view online and to download by contacting the authors.
Guardian Datablog: Wide range of data, mostly UK-focused but some international, collected by The Guardian newspaper in the UK.
Geomatics Group LiDAR: LiDAR data covering a good proportion of the UK, as DSMs and DTMs, freely available for non-commercial usage. Registration Required
Environment Agency GeoStore: A wide range of GIS data from the UK Environment Agency, including canal/river data, listed buildings, environmental restrictions, protected areas and more.
Lle Geoportal for Wales: A wide range of geographic data for Wales, mostly environmental and natural resources related.
Natural England: Natural landscape boundaries including areas of National Parks, National Nature Reserves, SSSIs, Common Land, AONBs, Bogs, Mudflats etc.
Marine Scotland Interactive: A range of data on the seas around Scotland, including monitoring stations, renewable energy, protected areas and wildlife data.
Atmosphere, Weather and Climate
Met Office DataPoint: A range of forecast and observation data from the UK Met Office, provided through an API which allows download in a range of formats, including map overlays, text and images.
Atlas of Rural Settlement in England: GIS data of the maps from Brian Roberts and Stuart Wrathmella's An Atlas of Rural Settlement in England, including extensive metadata. Includes locations of settlements, provinces and regions as well as terrain types and more.
OpenPopGrid: An open gridded population dataset for England and Wales, produced using dasymetric mapping to assign population numbers only to areas containing residential buildings.
Edubase: Data from the UK Government on all educational establishments (Nurseries, Primary Schools, Secondary Schools, Universities) in England and Wales. To download data, click Subscribe on the left and register. Two downloads are permitted per year.
Buildings and Points of Interest
Postbox locations: Locations of Royal Mail postboxes across the UK, derived from a Freedom of Information request to Royal Mail, plus OpenStreetMap data. Provided in tab-separated format, with latitude and longitude co-ordinates
Open Postcode Geo: 'Value-added' UK postcode data, excluding Northern Ireland, containing hierarchical postcode areas (districts, sectors etc) as well as latitude/longitude, easting/northing and more.
Postcode boundaries: Postcode boundaries at multiple levels (from postal town areas to unit postcodes), released under an open data license.
Postcode boundaries: Similar to the above, but more up-to-date, and generated from CodePoint Open.
Police data archive: Police data showing all recorded crimes and their location, type and eventual outcome.
London Open Data: Open access to data that the Greater London Authority and other related organisations holds
Natural Earth - Vector: Includes coastline, land, oceans, islands, rivers, lakes, glaciated areas and bathymetry. Available at multiple levels of detail. A version of this data is also available in the Wagner VII projection, which has good equal area properties, here.
Natural Earth - Raster: Includes various raster images, intended for use as backgrounds for other data, for example hypsometric tints, satellite derived land cover, shaded relief etc.
Global Map: A set of consistent GIS layers covering the whole globe at 1km resolution including: transportation, elevation, drainage, vegetation, administrative boundaries, land cover, land use and population centres. Produced by the International Steering Committee on Global Mapping. Registration Required
DIVA-GIS Country Data: A collection of data collected from a number of the sources below - includes administrative areas, inland water, roads and railways, elevation, land cover, population and climate. Probably the easiest place to get a simple set of data for a specific country.
UNEP GEOdata: A wide range of data from the United Nations Environment Programme including Global Forest Cover, Global Potential Evapotranspiration, Global Average Monthly Temperatures, Dams, Watershed Boundaries and much more. To get data, choose Advanced Search and select Geospatial Data Sets from the top drop-down link
Koordinates: GIS data aggregation site including data in a number of categories such as elevation, environment, climate etc. Some global datasets, some based on continents, some for specific countries. Mostly vector, but some raster. Registration required
MapCruzin: GIS aggregation site including wide range of data for various areas of the world. Some datasets appears to be of low quality, but others are good.
GeoNetwork: GIS aggregation site including a wide range of data under various categories (both human and physical).
European Environment Agency: Maps and datasets from the European Environment Agency, covering a huge range of physical geography and environmental topics. Europe only.
Land and Ocean Boundaries
GSHHS: A Global Self-consistent, Hierarchical, High-resolution Shoreline Database - which basically means it's good quality (no internal inconsistencies, good accuracy).
GDEM: 30m resolution global elevation data derived from ASTER satellite images
SRTM: Approx 90m (3 arc-second) resolution elevation data from the Shuttle Radar Topography Mission for the whole world.
EarthEnv-DEM90: 90m-resolution near-global DEM created by merging the GDEM and SRTM products and post-processing to fill voids and smooth data.
ETOPO1: 1 arc-minute resolution relief model including ocean bathymetry.
OpenTopography: A community-based site giving free access to high-resolution topography data. Data at the moment appears to be clustered on the West Coast of the USA and in Greenland, and is available both as dense point clouds and processed DEMs.
Weather and Climate
WorldClim: Climate data for past, present and predicted future conditions. Includes temperature (min, max, mean) and precipitation. 1km x 1km resolution.
NCAR GIS Climate Change Scenarios: Lots of data from the National Centre for Atmospheric Research models, including data used by the IPCC in their reports. Registration required
CRU Climate Datasets: Various datasets including temperature, precipitation, pressure, drought, paleoclimate and others, from the (infamous) Climate Research Unit at the University of East Anglia. High and low resolution datasets available.
Downscaled GCM Portal: A wide range of downscaled (that is, higher resolution data) created from the outputs of a wide range of GCMs. Covers the majority of important climate variables.
Natural Disaster Hazards: Hazard Frequency, Mortality and Economic Loss Risk as gridded data for the globe. Covers cyclones, drought, earthquakes, flood, landslide, volcano and a combination of them all ('multihazard').
USGS Earthquakes Database: KML files of all earthquakes recorded by the USGS (across the whole world) from 1973 to present. Available as one dataset or grouped by magnitude or year.
IBTrACS: Hurricane and tropical cyclone tracks, including attributes such as minimum pressure, maximum winds. (Also, USA tracks can be visualised here)
NOAA/WDC Historical Tsunami Database: Location information of tsunami sources and run-up events, including many attributes (eg. maximum water height, travel time). Available in TSV format which can be imported into GIS systems.
MODIS Fire Detection Data: Frequently updated data (including last 7 days of fires) in 1km grid format, derived from thermal anomalies from MODIS data.
USGS Land Cover Institute: Great set of links to almost all land cover datasets. Links here include most of the datasets below, and many more esoteric data such as river observations, aquifers data and ocean colour information. Although the page starts with US data, it continues with data for other continents lower down the page
Corine Land Cover Map: Europe only. Satellite derived land cover, available as at 1990, 2000 and 2006 in vector and raster formats. 100m and 250m resolutions.
GLOBCOVER: Global land cover dataset at 300m resolution from the MERIS sensor on the ENVISAT satellite.
UMD GLC: 1km resolution global land cover maps from the University of Maryland created using a classification tree approach from MODIS data
EarthEnv Global Consensus Land Cover: 1km-resolution global land cover, produced by integrating many other land cover datasets, and providing information on the consensus (or lack of consensus) between them
Atlas of the Biosphere: Raster maps of environmental variables including soil pH, potential evapotranspiration, average snow depth and many more.
Lifemapper: Species distribution maps - both recorded and predicted (based on climate, terrain and land cover). Covers a huge number of species. *Data is available by clicking on Species Archive, searching for a species and then clicking on the number of points and choosing the SHP link at the top. Alternatively, web services are available.
Net Primary Productivity: Gridded Net Primary Productivity data across the globe, including a novel measure of 'Human Appropriation of NPP' measuring how much of the NPP of an area humans are using.
World Soil Information: Gridded datasets covering the world's soils at a maximum resolution of 5 arc-minutes with 22 attributes for each cell including organic carbon content, gypsum content, water capacity etc. Data is given for topsoil and subsoil. More detailed datasets for individual countries and continents are available.
Harmonized World Soil Database: Combining regional and national soil databases and maps from many countries under the Land Use Change programme of the UN FAO. Includes soil units and parameters (such as pH, depth, and texture) and is at a resolution of 30 arc-seconds.
ReefBase GIS: GIS data about coral reefs worldwide, including extensive attribute data.
Human Impacts to Marine Ecosystems: Data from the National Center for Ecological Analysis and Synthesis on human impacts to marine ecosystems. Includes fishing impacts, ocean acidification, sea surface temperature, pollutants and more.
Carbon Dioxide Information Analysis Center: All data products from this center are available for download, including atmospheric CO2 concentrations (including the famous Mauna Loa dataset), precipitation data, long-term modelling data and more.
UNEP WCMC: Variety of datasets from the United Nations Environment Programme including global wetlands, global distribution of coral reefs, mangrove distributions and more.
Aquamaps: Standardised distribution maps for over 11,000 species of fish, marine mammals and invertebrates. *Data available for download under High Resolution Maps and Environmental Data links.
BioFRESH: Contemporary distributions of freshwater species, mapped in vector format across the world
Global Habitat Heterogeneity: A set of 14 metrics on the spatial heterogeneity of global habitat, at 1km, 5km and 25km resolutions, derived from MODIS EVI data.
Mineral Resources/Oil and Gas
OneGeology Portal: Combined geological maps from many geological organisations across the world. Levels of detail vary across the world, but basic data is available for many areas, with more detail for certain countries.
Mineral Resources Data System: Vector data of mineral resources across the world including names, locations, descriptions, geological characteristics etc.
UNEP GEOdata: A wide range of data from the United Nations Environment Programme including Nighttime Lights, Pollutant Emissions, Commercial Shipping Activity, Protected Areas and Administrative Boundaries. To get data, choose Advanced Search and select Geospatial Data Sets from the top drop-down link
World Bank Geodata: A wide range of World Bank datasets converted to KML format, includes GNP, schooling and financial data.
Atlas of the Biosphere: Gridded human data including per capita oil usage, literacy rate, population growth rate, built-up land and many more.
Koordinates: GIS data aggregation site including data in a number of categories such as administrative boundaries, transportation etc. Some global datasets, some based on continents, some for specific countries. Mostly vector, but some raster. Registration required
GISTPortal: Wide range of GIS data from a project funded by UNAID to provide spatial data for humanitarian purposes. Registration Required
ESPON Grid Data: Various human geography indicators in gridded raster form across Europe, including GDP, population and unemployment in 2003 and 2006.
MapCruzin: GIS aggregation site including wide range of data for various areas of the world. Some data appears to be of low quality, but others are good.
GeoNetwork: GIS aggregation site including a wide range of data under various categories (both human and physical).
History Database of the Global Environment: Gridded time-series of population, land-use for the last 12,000 years. Also includes GDP, agriculatural areas, yields and greenhous gas emissions for the last century.
Natural Earth: Includes countries, disputed areas, first-order admin (departments, states etc), populated places, urban polygons, parks and protected areas and water boundaries. Available at multiple levels of detail.
GADM: Global administrative boundaries, with extensive attribute sets. Covers countries and up to four levels of internal administrative boundary (states, departments, counties etc). (For Land Cover see above)
World Borders: World country borders with attributes including country codes (FIPS, ISO etc), area and populations.
Europe in the World: Administrative boundaries for Europe with lots of attribute data for each country/region including information on economy, demography and infrastructure.
IUCN 2013 Red List: Set of shapefiles produced by the IUCN showing the distribution of endangered species of plants and animals across the world
Protected Planet: Map of protected areas across the whole world, of almost all types. Available for download by clicking the 'Download All' link on the homepage, and then scrolling to the bottom and choosing KMZ, SHP or CSV.
Global Land Use Dataset: Gridded data at 0.5 degree resolution showing population density, potential natural vegetation, cropland extent, grazing land extent, built-up land extent, crop extent (for 18 major crops) and land suitability for cultivation
Human Influence and Footprint: Human Influence Index and Human Footprint calculated from various factors which exert human influence on ecosystems, for example population distribution, urban areas, navigable rivers etc. Available at 30 arc-second resolution.
Global Agricultural Lands: Extent and intensity of use of agricultural lands (both cropland and pasture) in 2000 from MODIS and SPOT images and agricultural inventory data.
Coastal Water Quality: Quality of coastal waters across the globe measured by chlorophyll concentrations from SeaWIFS satellite. Data for 1998 and 2007.
Global Reservoir and Dam Database: Geographically-referenced data on all reservoirs with a storage capacity of more than 0.1 cubic kilometres. The data consists of polygons outlining reservoirs at high spatial resolution with extensive metadata about the dam and reservoir. Registration required
Wars, Conflict and Crime
ACLED: Armed Conflict Location and Event Data - containing all reported conflict events in 50 countries in the developing world. Data from 1997 to present, and in Afghanistan and Pakistan from 2006 until present.
Global Urban Extent: Maps showing urban extent across the world, at 500m resolution, derived from MODIS images. Requires email to author to download
GeoHive: Population and country statistics. Not provided in GIS data formats, but can easily be converted from CSV
Buildings, Roads and Points of Interest
OpenStreetMap: Crowd-sourced data for the whole world consisting of most things you'd find on a standard local paper map: points of interest, buildings, roads and road names, ferry routes etc.
OSM Metro Extracts: City-sized extracts of the OpenStreetMap dataset, updated weekly for cities across the world
POI Factory: Point of Interest files originally designed for use in GPS units, but they can be loaded into a GIS fairly easily. Widely varying quality, and coverage, but includes such things as shop and business locations (eg. all Tesco stores, all McDonald's restaurants) as well as places of worship, speed cameras etc. Registration is required. To download data in a GIS-ready form choose Garmin CSV format on the download page. The CSV file will contain Latitude and Longitude in WGS-84 co-ordinates, as well as descriptions.
SimpleGeo's Places: Point of Interest data from SimpleGeo, provided as a 2Gb Zip file and licensed under the Creative Commons license. Contains over 21 million POIs for over 63 countries.
Nuclear Power Station locations: Locations of all nuclear power stations worldwide (according to the IAEA), provided as a Google Fusion Table. Export to CSV for easy import to a GIS system
Transport and Communications
Open Flights: Airport, airline and route data across the globe. Data is provided as CSV files which can be easily processed to produce GIS outputs. Data includes all known airports, and a large number of routes betwen airports.
World Port Index: Dataset from the National Geospatial Intelligence Agency listing approximately 3700 ports across the world, with location and facilities offered.
Global Roads Open Access Data Set: A vector dataset of roads across the world, using a globally consistent data model, and suitable for mapping at the 1:250,000 level. Only roads between settlements are included, not residential streets, and the dataset is accurate to approximately 50m. This dataset is in beta-testing at the moment and will be fully available shortly
Undersea Telecommunications Cables: Open source undersea telecommunication cables map, updated frequently. Data can be visualised in the embedded viewer or shapefiles can be downloaded by clicking the Raw Data link on the top right.
NGIS Country Files: A list of names of regions, areas and populated places for each country in the world, provided by the US Government, with geo-references for each place.
Geonames Country Information: List of all countries in the world with ISO and ISO3 country code (eg. GB for the United Kingdom and FR for France) with capital city, area, population, internet top-level domain, currency, official languages and neighbours.
GRUMP Settlement Points: Locations of individual settlements (as a time series, showing new settlements appearing over time), derived from the Global Rural-Urban Mapping Project.
G-Econ: Geographically-based economic data, basically providing measurements like GDP but on a raster cell basis (known as Gross Cell Product).
Internet Map: Data which can be used to produce maps like those shown here showing major linkages in the internet, as well as density of people online.