Data sets

This site wouldn't be possible without following data sets:

Relief map
Natural Earth II by Tom Patterson. Terms of Use:
All versions of Natural Earth II found on this website are in the public domain. You may use the maps in any manner, including modifying the content and design, electronic dissemination, and offset printing. The author, Tom Patterson, renounces all financial claim to the maps and invites you to use them for personal, educational, and commercial purposes.
Satellite maps
NASA Blue Marble.
World coastline map
Derived from "Map of the world in an equirectangular projection with Tissot's Indicatrix of deformation" by Eric Gaba. This file is licensed under the Creative Commons Attribution ShareAlike 3.0 License. Derived map is licensed under the the same license.
Topo map
ASTER Imagery. Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Global Digital Elevation Model (GDEM), NASA and Japan's Ministry of Economy, Trade and industry (METI).
Geospatial data
© by Stefan Helders
Exonym data
Place names in different languages are derived from Wikipedia. Derived data is licensed under the Creative Commons Attribution ShareAlike 3.0 License. See also Wikipedia's Copyright and license page.
Climate data
Precipitation, Wet days: New, M., Lister, D., Hulme, M. and Makin, I., 2002: A high-resolution data set of surface climate over global land areas. Climate Research 21.
Temperature, humidity: NASA Langley Research Center Atmospheric Science Data Center.
Altitude data
NOAA/NGDC-Global Relief Data
Accommodation data
Mini Icons
“Mini” is a set of 144 GIF icons available for free use for any purpose,
AJAX loader icon
Generated gifs are totally free for use, Ajaxload.
IP geolocation database
This site includes IP2Location LITE data available from,


Guihua Zhu.