OpenLayers has been developed to further the use of geographic information of all kinds. It is completely free, Open Source JavaScript, released under the 2-clause BSD License (also …

If you're eager to get your first OpenLayers map on a page, dive into the quick start. For a more in-depth overview of OpenLayers core concepts, check out the tutorials.

topolis integration (topolis.html) Example on how to use topolis with OpenLayers.

The first command will create a directory called my-app (you can use a different name if you wish), install OpenLayers and a development server, and set up a basic app with index.html, …

The ol package The recommended way to use OpenLayers is to work with the ol package. To add OpenLayers to an existing project, install the latest with npm: npm install ol If you are starting a …

API change policy The OpenLayers API consists of names and signatures of constructors names and signatures of instance methods and properties names and signatures of functions names …

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OpenLayers implements a JavaScript API for building rich web-based geographic applications, similar to the Google Maps APIs, with one important difference -- OpenLayers is Free …

Every map that you'll create with OpenLayers will have a view, and every view will have a projection. As the earth is three-dimensional and round but the 2D view of a map isn't, we …

This demonstrates the use of the geometryFunction option for the ol/interaction/Draw. Select a shape type from the dropdown above to start drawing. To activate freehand drawing, hold the …