Archive for the ‘GEODATA’ Category


October 14, 2016




[ ITALY ] – The National Geoportal

October 13, 2016

The national geoportal of ITALY

he National Geoportal of the Ministry of Environment and Protection of Land and Sea, operates within the regulatory framework established by Legislative Decree no. 32/2010 and subsequent amendments and additions, the Italian transposition of the European Directive 2007/2 / EC establishing an Infrastructure for Spatial Information in the European Community (INSPIRE).

Article.8 paragraph 2, of Legislative Decree no. 32/2010 provides that the National Geoportal is the national access point for the aims of the INSPIRE Directive thereby providing a basis for the competent authorities, third parties, and private citizens to seek the spatial information available.

The National Geoportal is at the core of a network architecture designed as a federated network in which each node is “connected” to the central access point that is the National Geoportal itself. The main goal is the creation of a widespread environmental geographic information system consisting of nodes which make available their own environmental spatial information by sharing its metadata: the management and updating of metadata, spatial data and related services are carried out that way by the administration that produces the data without any physical transfer of it. This network is made up mainly by public authorities which may, in this way, fulfill its institutional obligations regarding the planning and management of land and environment.


The USGS Land Cover Institute (LCI) – Get Land Cover Data

November 7, 2014

 The USGS Land Cover Institute (LCI) – Get Land Cover Data

The LCI will address land cover topics from local to global scales, and in both domestic and international settings. The USGS through the Land Cover Institute serves as a facilitator for land cover and land use science, applications, and production functions. The institute assists in the availability and technical support of land cover data sets through increasing public and scientific awareness of the importance of land cover science.

United States Land Cover Data Links

African Land Cover Data Links

Asian Land Cover Data Links

European Land Cover Data Links

Central American Land Cover Data Links

South American Land Cover Data Links

Australasian Land Cover Data Links

Mixed Datasets

Other Sites of Interest

USGS Information Links

USGS Science Centers

GISCO: Geographical Information and maps – Geodata

October 30, 2014

The geodatafiles presented in this section can be downloaded. To process the downloaded geo-data, the availability of a Geographic Information System (GIS) software is required. Should you look for maps as final product (images) please feel free to browse through the “maps” section.

All datasets are provided with metadata in XML format. An XML style-sheet is also provided to facilitate the metadata visualisation with an HTML browser.

Geographical datasets are provided in two formats: shapefile and ‘personal geodatabase’. Shapefiles have a limitation in the attribute name length. For this reason the attribute name might be truncated when compared to the name found in the metadata or in the personal geodatabase.


GISCO: Geographical Information and maps – Digital Elevation Model (DEM)

October 30, 2014

GISCO: Geographical Information and maps – Digital Elevation Model (DEM)

A ‘Digital Elevation Model (DEM)’ is a 3D approximation of the terrain’s surface created from elevation data.

The term ‘Digital Surface Model (DSM)’ represents the earth’s surface and includes all objects including e.g. forests, buildings.

The Digital Elevation Model over Europe from the GMES RDA project (EU-DEM) is a Digital Surface Model (DSM) representing the first surface as illuminated by the sensors. EU-DEM covers the 39 member and cooperating countries of EEA and it has been produced by a consortium led by Indra. Intermap edited the EU-DEM and AGI (Aerogeodezijos Institutas) provided the water mask. The EU-DEM dataset is a realisation of the Copernicus programme, managed by the European Commission, DG Enterprise and Industry. The EU-DEM is a 3D raster dataset with elevations captured at 1 arc second postings (2.78E-4 degrees) or about every 30 metre. It is a hybrid product based on SRTM and ASTER GDEM data fused by a weighted averaging approach. The EU-DEM has been generated as a contiguous dataset divided into 1 degree by 1 degree tiles corresponding to the SRTM naming convention. The spatial reference system is geographic, lat/lon with horizontal datum ETRS89, ellipsoid GRS80 and vertical datum EVRS2000 with geoid EGG08. The vertical unit of this DSM is metres. These tiles have then been aggregated into 5°x5° tiles which have been projected to ETRS-LAEA by JRC.

In addition, several products have been generated:

a) a colour shaded relief image over Europe has been created by EEA using a hillshade dataset derived from the ETRS89-LAEA version of EU-DEM (Please note that this dataset cannot be used for analysis purposes and that there are some known artefacts West of Norway.);

b) the hydrography layer (streams, confluence points, and watersheds) and

c) the Root Mean Square Error (denoting the error derived in the quality assessment procedure).

All datasets of Version 1 are made available as tiles (5×5° or 1000x1000km) and as single files:

•EU-DEM in ETRS89 (EPSG code 4258)
•EU-DEM in ETRS89-LAEA (EPSG code 3035)
•Colour shaded relief image over Europe in ETRS89-LAEA (EPSG code 3035)

The datasets are encoded as GeoTIFF with LZW compression (tiles) or DEFLATE compression (European mosaics as single files) for the raster files, and as GDB for the Vector data sets.

The EU-DEM statistical validation documents a relatively unbiased (-0.56 meters) overall vertical accuracy of 2.9 meters RMSE, which is fully within the contractual specification of 7m RMSE. The full report is found here.

European Environmental Agency’s metadata for EU DEM

Access the DEM datasets from here:

* EU DEM (ETRS1989)


* EU DEM Coloured relief

* EU DEM Hillshade

* EU DEM Aspect

* EU DEM Slope


* EU DEM Hydrography (ETRS1989)

* EU DEM Hydrography (LAEA)

European Environment Agency (EEA) – Data and Maps

October 30, 2014

European Environment Agency (EEA) – Data and Maps

NOAA – Bathymetry and Global Relief

October 29, 2014

Bathymetry and Global Relief – Scientific stewardship, products, and services for ocean depth data and derived digital elevation models

EMODnet Bathymetry Portal

October 29, 2014

European Marine Observation and Data Network

This portal provides hydrographic data for the geo-professional. It assumes that the user has a basic familiarity with geo-spatial tools and terminology.

The EMODnet digital terrain model (DTM), on which all products in this portal are based, has been created at a resolution of 0.25 arc-minutes using the best available bathymetry from a variety of sources. There are still some areas where no high quality bathymetry is available. To prevent gaps in the EMODnet DTM layer, these areas have been filled with the GEBCO data.

Disclaimer: Although the bathymetry available in this portal is based on the best available bathymetry and every effort is made with respect to the quality assurance and quality control, it should be noted that, accuracy, completeness, reliability, usability or suitability of the bathymetry can not be guaranteed. Therefore the data available from this site is not to be used for navigation or for any other purpose relating to safety at sea. EMODnet assumes no responsibility for incorrect results or damages resulting from the use of the data.

World Data Service for Geophysics – Shoreline/Coastline Resources

October 29, 2014

The National Geophysical Data Center provides access to a variety of shoreline/coastline data sets. NGDC is a mirror site for the GSHHG database and also provide links to a variety of coastline resources (both NOAA and non-NOAA sources). All datasets are in WGS84 geographic (simple latitudes and longitudes; decimal degrees) horizontal datum.

National Oceanic and Atmospheric Administration’s – National Weather Service

October 29, 2014

National Oceanic and Atmospheric Administration’s – National Weather Service

Many of the National Weather Service data sets are available in formats that are able to be imported directly into Geographic Information Systems (GIS). Data formats include downloadable shapefiles, web services and even KML files.

This page is a work-in-progress. As more data is made available in these formats, links to the data will be added to these pages. Click one of the GIS format links below in to start exploring the NWS GIS data currently available! Questions?


Keyhole Markup Language (KML) is used by a variety of GIS and mapping applications and the specifications are freely available to the public and available to the user community without charge or restriction. KML is an XML-based language for managing the display of three-dimensional geospatial data in the programs Google Earth, Google Maps, Google Mobile, ArcGIS Explorer, WorldWind and other GIS viewers . The word Keyhole is an earlier name for the software that became Google Earth; the software was produced in turn by Keyhole, Inc, which was acquired by Google in 2004. (more about KML)

Shapefiles are a geospatial vector data format for geographic information systems software. Shapefiles spatially describe points, lines and polygons. A “Shapefile” commonly refers to a collection of files with “.shp”, “.shx”, “.dbf”, and other extensions on a common prefix name (i.e., “lakes.shp”). SHP files can be viewed in GIS viewers as well as more sophisticated GIS applications. (more about Shapefiles)

National Weather Service Base maps are available in Shapefiles. The AWIPS map database catalog contains background map data in Shapefile format that are used by the National Weather Service (NWS) for use by the user community. These data consist of a variety of official NWS forecast zones and county designations used by be NWS. In addition other data that might be of interest and that are used by the (NWS) Advanced Weather Information Processing System (AWIPS) are available through the catalog.