• Climatic dataset

    WORLDCLIM (free products) ➥
    NOAA Paleoclimatology Program ➥

    DEM

    SRTM, The Shuttle Radar Topography Mission, Data search (free products) ➥
    ASTER GDEM ➥

    Satellite

    SPOT ➥
    MODIS ➥
    GLCF: Global Land Cover Facility (free products) ➥

  • Bibliographic database

    ScienceDirect ➥
    Web of Science ➥
    Scirus ➥
    SpringerLink ➥
    ISI ➥
    Informa ➥
    WILEY InterScience ➥
    Cambridge Journals ➥
    Google Scholar ➥

  • ISO country code

    The 2-letter codes are supplied by the ISO (International Organization for Standardization). It bases its list of country names and abbreviations on the list of names published by the United Nations. The UN also uses uses 3-letter codes, and numerical codes to identify nations.