Popis

This data set was developed to describe the state of the global land cover in terms of 15 major vegetation types, plus water, before alteration by humans. It forms a complement to the historical croplands data set developed by Ramankutty and Foley (1999). By overlaying the two, one can determine the extent to which natural vegetation has been cleared for cultivation. This data set can be used directly within spatially-explicit climate and biogeochemical models. There are four total files in this data set. Two files contain the land cover types representing potential natural vegetation before human alteration, and two other files contain those points in the original data set submitted by the Principal Investigator that have been modified in order to match the land/water mask of the ISLSCP Initiative II.The geographic distribution of contemporary land cover types can be derived from remotely-sensed data. However, humans now dominate much of the world and there is little evidence of the pre-human-settlement natural vegetation or Potential Natural Vegetation (PNV). PNV, as defined here, does not necessarily represent the world's natural pre-human-disturbance vegetation. Rather, our definition of PNV represents the world's vegetation cover that would most likely exist now in equilibrium with present-day climate and natural disturbance, in the absence of human activities.

Obecné informace

• Dokumentace

  http://catalog.data.gov/dataset/islscp-ii-potential-natural-vegetation-cover Do you think this data is incorrect? Let us know

• Poskytovatel

  National Aeronautics and Space Administration Do you think this data is incorrect? Let us know

Právní informace

• Právní prohlášení

  http://catalog.data.gov/dataset/islscp-ii-potential-natural-vegetation-cover Do you think this data is incorrect? Let us know

• Under which licence can people outside the US reuse this data?

  Creative Commons CCZero Do you think this data is incorrect? Let us know

• Obsah chráněný autorským právem

  yes, and the rights are all held by the same person or organisation Do you think this data is incorrect? Let us know

• Licence obsahu

  Creative Commons CCZero Do you think this data is incorrect? Let us know

• Strojově čitelná data právního prohlášení

  licence k datům Do you think this data is incorrect? Let us know

• Ochrana soukromí

  nehraje roli, data se netýkají fyzických osob Do you think this data is incorrect? Let us know

Praktické informace

• Relevantní datové katalogy

  http://catalog.data.gov/organization/nasa-gov Do you think this data is incorrect? Let us know

• Zastarávání

  data časem zastarají, ale mají časové razítko Do you think this data is incorrect? Let us know

• Zálohování dat

  data jsou zálohována offsite Do you think this data is incorrect? Let us know

Technické informace

• URL datové sady

  http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=961 Do you think this data is incorrect? Let us know

Sociální informace

• Strojově čitelná metadata

  název Do you think this data is incorrect? Let us know

• Strojově čitelná metadata

  popis Do you think this data is incorrect? Let us know

• Strojově čitelná metadata

  hlavní URL Do you think this data is incorrect? Let us know

• Strojově čitelná metadata

  URL dokumentace Do you think this data is incorrect? Let us know

• Strojově čitelná metadata

  četnost aktualizací Do you think this data is incorrect? Let us know

• Strojově čitelná metadata

  poskytovatel Do you think this data is incorrect? Let us know

• Strojově čitelná metadata

  klíčová slova Do you think this data is incorrect? Let us know

• Strojově čitelná metadata

  hlavní témata Do you think this data is incorrect? Let us know

• Strojově čitelná metadata

  distribuce Do you think this data is incorrect? Let us know

• Strojově čitelná metadata

  datum vydání Do you think this data is incorrect? Let us know

• Strojově čitelná metadata

  datum poslední změny Do you think this data is incorrect? Let us know

• Strojově čitelná metadata

  související časové období Do you think this data is incorrect? Let us know

• Strojově čitelná metadata

  jazyk Do you think this data is incorrect? Let us know

• Strojově čitelná metadata k distribucím

  datum vydání Do you think this data is incorrect? Let us know

• Strojově čitelná metadata k distribucím

  URL pro přístup k datům Do you think this data is incorrect? Let us know

• Strojově čitelná metadata k distribucím

  URL datové sady Do you think this data is incorrect? Let us know

• Strojově čitelná metadata k distribucím

  typ média Do you think this data is incorrect? Let us know

• Kontakty

  http://catalog.data.gov/dataset/islscp-ii-potential-natural-vegetation-cover Do you think this data is incorrect? Let us know

• Zpětná vazba k publikovaným datovým sadám

  http://www.data.gov/issue/?media_url=http://catalog.data.gov/dataset/islscp-ii-potential-natural-vegetation-cover Do you think this data is incorrect? Let us know