Using an API key all Maps API applications load the maps. Longitude measurements range from 0° to 180° east or 180° (a positive longitude implies east) and range from 0° to -180° west or -180° (a negative longitude implies west) Longitude identifies the east to west location of a point on the Earth, by measuring the angular distance from the Greenwich meridian (or Prime meridian, where longitude is 0), along with equator. There is no obvious 0-degree point for longitude, as there is for latitude. Each longitude line is part of a great circle. Lines of longitude called meridians, run perpendicular to lines of latitude, and all pass through both poles. Therefore latitude measurements range from 0° to +90° or 0° to –90°. The latitude of a point on the Earth's surface is the angle between the equatorial plane and a line that passes through that point.Īs the equator is situated at 0°, the North Pole at 90° north or 90° (a positive latitude implies north), and the South Pole at 90° south or –90° (a negative latitude implies north). The Equator is a line which encircles the Earth at an equal distance from the North and South Poles. The ends of the axis are the North and South Poles. Imagine the Earth as a transparent sphere with an axis around which it spins. These coordinates values are measured in degrees and represent angular distances calculated from the center of the Earth. If a ship's captain or a pilot wants to specify a position on a map, they use these "coordinates". We can imagine the Earth as a sphere, so how we described where a points is on it's surface? The most common way to locate points on the surface of the Earth is described by two numbers-its latitude and its longitude.
This tutorial is designed to show the user (familiar with JavaScript programming and object-oriented programming concepts) how to create a Google Map and related application using the Google Maps JavaScript API V 3. The Google maps API, gives you the freedom to create customized maps, which can do all sorts of cool staffs.
The application provides detailed information about geographical regions, sites, street maps, a route planner for traveling by foot, car, aerial and satellite views of many places in numerous countries around the world. Google Maps is a web-based mapping service application and technology provided by Google.
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