Geographic coordinates use latitude and longitude to precisely locate Earth. System forms imaginary grid of lines covering entire planet. Locations measured in degrees, minutes, and seconds
WGS84 is the standard coordinate system for mapping. EPSG 4326 is the identifier for WGS84. EPSG 3857 is a Spherical Mercator projection system
Google Earth is a 3D virtual Earth created from aerial, GIS and satellite data. The software is free to use, with the Pro version becoming free in 2015. Images are not real-time but updated frequently from various sources
Open source routing engine for OpenStreetMap and GTFS data. Supports distance, time, turn-by-turn instructions and road attributes. Includes isochrone calculation and mobile navigation capabilities. Uses Contraction Hierarchies for fast routing with predefined profiles
Street View has collected over 170 billion images from 87 countries since 2007. More than 1,000 third-party sources provide authoritative data worldwide. Local governments can upload road and address data directly to Google Maps
KMZ is a zipped file containing compressed KML files. KML is XML notation for expressing geographic information in maps. KMZ files can include place marks, images, polygons, 3D models and text