The map gallery Gridded Species Distribution contains sample maps for the Species Grids data set. In geological models a geological unit is bounded by 3-dimensional (3D) triangulated or gridded surfaces. Data are available as global, hemispheric, zonal, and gridded averages. It is played between two or more players on a gameboard having numbered, gridded squares. Gridded electrostatic ion thrusters commonly utilize xenon gas. It is usually a rectangular block of gridded fuel rods. They can be applied to gridded or scattered data. Accessories produced include gridded maps, both specific to adventures and generic. It was a contemporary superior, detailed nautical model chart, gridded by compass lines. These are BUFR, CREX, and, for gridded geo-positioned data, GRIB. However, coverages are more general than just regularly gridded imagery. It was similar to a gridded electrostatic ion thruster and used mercury for propellant. The urban quarters are further divided by networks of gridded streets. This allows much smaller thrusters compared to gridded ion thrusters. Many exceptions to Toronto's gridded street matrix are found in Etobicoke.