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This web page lists some locations on free, publicly viewable satellite map services that have such issues due to censorship, blurring, or low resolution. It does not show a blurred satellite image of the earth, but it mentions some countries and regions that are partially or completely obscured.
Learn about the ECEF coordinate system, a cartesian spatial reference system that represents locations in the vicinity of the Earth as X, Y, and Z measurements from its center of mass. Find out how to convert between ECEF and other coordinate systems, such as geodetic coordinates (latitude and longitude), and how ECEF is used in geodesy, astronomy, and satellite navigation.
Nukemap is a website that lets users model the effects of nuclear weapons on any location and altitude. It was created by Alex Wellerstein, a historian of science, and has been used for education, visualization and nuclear strategy.
As Halloween approaches, it's the perfect time to try to find ways to make your hair stand on end. As Google has tirelessly documented the world through Street View, it has collected a bunch of ...
GEOREF is a grid-based method of specifying locations on the Earth, using a simpler and more flexible notation than latitude and longitude. It was used mainly for aeronautical charts, and can be adapted to give co-ordinates with varying degrees of precision.
A spatial reference system (SRS) or coordinate reference system (CRS) is a framework used to precisely measure locations on the surface of Earth as coordinates. It consists of a coordinate system, a datum, and a projection, and can be geographic, geocentric, projected, or engineering.
Geohash is a public domain geocode system that encodes a geographic location into a short string of letters and digits. It is a hierarchical spatial data structure that subdivides space into buckets of grid shape, using a recurrent four-partition of the space and a base 32 alphabet.
Learn how to measure and communicate positions on Earth using latitude and longitude, and how different geodetic datums affect the coordinates. Explore the history and standards of the geographic coordinate system and its applications in cartography and geodesy.