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GlobCover Version 2 Global 300m LULC Released
posted by Satri
on Friday October 03, @10:51AM
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from the land-cover-users-rejoice dept.
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from the land-cover-users-rejoice dept.
An important land use land cover global dataset was released this week, the ESA's GlobCover Global LC version 2 at a spatial resolution of 300m.
Amongst the highlights: "The GlobCover Land Cover product is the highest resolution (300 meters) Global Land Cover product ever produced.
The GlobCover Land Cover product is based on ENVISAT MERIS data at full resolution from January 2005 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."
Be careful, the product description and some webpages have not been updated yet but should be very soon.
We discussed GlobCover in the past. Our Land Use topic may also be of interest.
Related Stories
ESA's GlobCover 300m Global LULC Coverage
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All Points Blog links to ESA's GlobCover project which released a global land use land cover classification at 300m. From the site: "The GlobCover project has developed a service capable of delivering global composite and land cover maps using as input observations from the 300m MERIS sensor on board the ENVISAT satellite mission. The GlobCover service has been demonstrated over a period of 18 months [Januray 2005 - June 2006], for which a set of MERIS Full Resolution (FR) composites (bi-monthly and annual) and a Global Land Cover map have been produced. The GlobCover composites are the results of a set of processing made on the MERIS FR images such as cloud detection, atmospheric correction, geolocalisation and re-mapping. The GlobCover Land Cover map is compatible with the UN Land Cover Classification System (LCCS)." Yes, it's free. See also related stories below.
GlobCover Global 300m LULC Update
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Via AGISRS, here's two updates on the GlobCover dataset which provides free 300m-resolution land-use land-cover of global coverage. We discussed GlobCover about a year ago, the source data is not available but should be this coming July. You can browse the whole world GlobCover LULC data using the tool in the links above. From the ESA article: "Earth’s land cover has been charted from space before, but this map, which will be made available to the public upon its completion in July, has a resolution 10 times sharper than any of its predecessors.
Scientists, who will use the data to plot worldwide land-cover trends, study natural and managed ecosystems and to model climate change extent and impacts, are hailing the product – generated under the ESA-initiated GlobCover project – as 'a milestone.'"
See other LULC related stories below.
ISCGM Global Map V.1 Available
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Via internal email I learned about the recent availability of the International Steering Committee for Global Mapping (ISCGM) Global Map V.1.
The highlights for the two main products: "Land Cover(GLCNMO):
A GLCNMO is the data of 1km grid with 20 land cover items. The data were created by using MODIS data observed in 2003. A 16 days composite of 2003 is used for land cover classification. The classification is based on LCCS developed by FAO. Therefore, it is possible to compare and integrate GMLNMO and other land cover data products based on LCCS.
PTC (Percent Tree Cover): PTC represents the density of trees on the ground. The data show the ratio of the area covered with branches and leaves of trees (tree canopy) to the ground surface seen from the above (vertical direction). Satellite images of the whole globe at every 1km2 from the MODIS sensor of Terra were used for the data creation. As for deciduous trees, which drop all their leaves during the period of low temperature or dryness, the ratio of the most flourishing period of a year (Maximum Percent Tree Cover) was referenced as the Percent Tree Cover." Commercial use is possible. I wonder what are the incentive to using this dataset instead of the recent GlobCover LC v2.1 product. We mentioned this initiative almost two years ago. See related stories below and our Land Cover topic.
PTC (Percent Tree Cover): PTC represents the density of trees on the ground. The data show the ratio of the area covered with branches and leaves of trees (tree canopy) to the ground surface seen from the above (vertical direction). Satellite images of the whole globe at every 1km2 from the MODIS sensor of Terra were used for the data creation. As for deciduous trees, which drop all their leaves during the period of low temperature or dryness, the ratio of the most flourishing period of a year (Maximum Percent Tree Cover) was referenced as the Percent Tree Cover." Commercial use is possible. I wonder what are the incentive to using this dataset instead of the recent GlobCover LC v2.1 product. We mentioned this initiative almost two years ago. See related stories below and our Land Cover topic.
GlobCover v.2.2 and Validation Report Now Available
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About two months after the GlobCover LC v2.1 release, we learn in a short note that The latest GlobCover V.2.2 Land Cover mosaic is now available with the Product Description and Validation Report. See also related stories below.
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GlobCover Version 2 Global 300m LULC Released
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educational and scientific use only
(Score:3, Informative)TrueMarble
(Score:1, Interesting)hmm... and what about TrueMarble? http://www.unearthedoutdoors.net/global_data/land
since when is 300m better than 15m?
Re:TrueMarble
(Score:3, Informative)( http://alexandreleroux.blogspot.com/ | Last Journal: Friday March 17, @05:07PM )
On the TrueMarble marble website: "These datasets are still highly experimental", this isn't the case with GlobCover.
Also, TrueMarble is available at 250m for free, otherwise you must pay.
And finally, the timestamp: GlobCover is based on recent MERIS data, TrueMarble is based on "GLC2000", which I assumed is based on 2000 data, but I can only assume because the website provided for GLC2000 gives a "Bad Request (Invalid Hostname)", that says a lot about the underlying data...
I am not related to GlobCover and have not used it (yet - will do soon), but clearly TrueMarble does not seem 'relevant' in comparison to GlobCover v2.
Re:TrueMarble
(Score:4, Informative)