Posts Tagged ‘jrc’

Natural Earth updated to version 1.2

Tuesday, May 25th, 2010

This update introduces supplementary hydrography features in North America and Europe that quadruple (4x) the number of lakes and rivers there. Many thanks to Tom P. for generalizing the vectors and Preston M. for adding tapering to North America (absent in Europe). In some cases the basic 10m rivers and lakes were modified to fit the new information and that’s been refreshed, as well. The North America data comes from the CEC North America Environmental Atlas. The Europe data extract is kindly provided into the public domain by the European Commission, Joint Research Centre (JRC), thanks Alfred J! Check out their original, higher resolution Europe data.

On the cultural front, North America gets roads and rails. General 10m detail roads and railroads come from the CEC North America Environmental Atlas. The supplementary roads are donated by XNR Productions and are at 1m scale, thanks Laura M. and Rob!

If you have data or time to contribute, especially to flesh out the new transportation and hydro themes, please contact me at nathaniel@naturalearthdata.com.

Note: We are not committing to building out supplementary level of detail in the rest of the world (we’re not THAT crazy!), but will incorporate such data if you contribute it. As always, we edit these data files but you should too before you publish maps using them. Feed us back corrections.

Download new or updated files »
(54.11 MB) version 1.2.0

(below) Rivers and lakes in North America. On the left the version 1.1 hydro features. On the right in color are the new, supplemental version 1.2 hydro features, 4x the density of features at the same 10m linework generalization.

northamerica_extra_10m_hydro

(below) Rivers and lakes in Europe. On the left the version 1.1 hydro features. On the right in color are the new, supplemental version 1.2 hydro features, 4x the density of features at the same 10m linework generalization.

europe_hydro_extra_10m

(below) Highways (red and blue) and ferry routes in North America.

northamerica_10m_roads_base

(below) Supplemental road detail in North America. Slightly different feature class scheme and data vintage.

northamerica_10m_roads_extra

(below) Railroads in North America.

northamerica_10m_railroads_base

Data: ESA Global Land Cover Map Available Online (ESA)

Sunday, January 11th, 2009

ESA’s global land cover map

[Editor's note: Updated 300 meter resolution global landcover raster provides crisper, better validated snapshot. Available in GeoTIFF format as 1 file or regional (continental-level) compressed files. Thanks Martin!]

Republished from European Space Agency. 
Original post date: 19 December 2008.

View legend. Image previews of the world map (hi-res jpg | tiff). 

ESA’s global land cover map, which is ten times sharper than any previous global satellite map, is now available to the public online from the GlobCover website. It is the highest resolution land cover map that has been completely validated ever released. 

Sixteen experts validated the map using more than 3,000 reference land cover points and showed it had an overall accuracy of 73% weighted by area for its 22 land cover classes. The map’s legend was developed using the United Nation Food and Agriculture Organisation’s (FAO) Land Cover Classification System (LCCS). 

GlobCover legend
  GlobCover legend

The map was generated using 19 months worth of data from Envisat’s Medium Resolution Imaging Spectrometer (MERIS) instrument working in Full Resolution Mode to provide a spatial resolution of 300 m. Data were collected between December 2004 and June 2006.A consortium of specialists worked to process the map, including Medias France, Germany’s Brockmann Consult and Belgium’s Université catholique de Louvain. 

Global validation points
Global validation points
 

These data are useful for many applications, including modelling climate change extent and impacts, conserving biodiversity and managing natural resources. The map has been downloaded by more than 4 000 people since October 2008. 

The GlobCover project is part of ESA’s Earth Observation Data User Element (DUE). An international network of partners has worked with ESA on the project, including the United Nations Environment Programme (UNEP), FAO, the European Commission’s Joint Research Centre (JRC), the European Environmental Agency (EEA), the International Geosphere-Biosphere Programme (IGBP) and the Global Observations of Forest Cover and Global Observations of Land Dynamics (GOFC-GOLD) Implementation Team Project Office.

The GlobCover LC version 2 is available to public through the following ftp server: 
ftp://uranus.esrin.esa.int/pub/globcover_v2/

On the FTP you will find: 
1) The LandCover V2 in greyscale geotiff 
2) The QL – Quality file geotiff 
3) The legend in xls file 
4) The latest Product Description Manual PDM_I2.1

The GlobCover Land Cover product is the highest resolution (300 meters) Global Land Cover product ever produced and independently validated.  The GlobCover Land Cover product is based on ENVISAT MERIS data at full resolution from December 2004 to June 2006.  The GlobCover Land Cover product has been developed in partnership with EEA, FAO, GOFC-GOLD, IGBP, JRC and UNEP.  The GlobCover Land Cover product is labelled according to the UN Land Cover Classification System.

When using the GlobCover Land Cover product acknowledgment shall be as follow: 

Source data: © ESA / ESA GlobCover Project, led by MEDIAS-France 
Image: © ESA / ESA GlobCover Project, led by MEDIAS-France