Javascript

OpenLayers

OpenLayers is a Javascript library that can display map tiles and markers loaded from any source in web browser. It provides an API for building rich web-based geographic applications.

Mapstraction

Mapstraction is a Javascript library. It provides developers with a single interface for a wide variety of Javascript map APIs including Leaflet, Google, Bing, OpenLayers and ESRI's ArcGIS.
A key benefit is that once a developer has loaded Mapstraction, s/he can to switch from one map API to another quickly and easily - often only needing to change a few lines of code.
Mapstraction displays points, lines, polygons and markers on the maps, and also allows developers to add base maps and overlays.

timemap

Timemap.js is a Javascript library that helps you to produce online maps (such as Google, OpenLayers, and Bing) along with a SIMILE timeline. You can load one or more datasets (in JSON, KML, or GeoRSS) onto both a map and a timeline simultaneously. By default, only items in the visible range of the timeline are displayed on the map.

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