OpenLayers| Map | View | Layers |
|---|---|---|
A map is made of layers, a view to visualize them, interactions to modify map content and controls with UI components. OverviewCreation Events |
The view manages the visual parameters of the map view, like resolution or rotation. ol.View with center, projection, resolution and rotation |
Layers are lightweight containers that get their data from sources. ol.layer.Tileol.layer.Image ol.layer.Vector ol.layer.VectorTile |
| Controls | Interactions | Sources and formats |
| Map default controls All controls |
Map default interactions Interactions for vector features All interactions |
Tile sources for ol.layer.Tile
Image sources for ol.layer.Image Vector sources for ol.layer.Vector Vector tile sources for ol.layer.VectorTile Formats for reading/writing vector data ol.format.WMSCapabilities |
| Projections | Observable objects | Other components |
All coordinates and extents need to be provided in view projection (default: EPSG:3857). To transform, use ol.proj.transform() and ol.proj.transformExtent(). ol.proj |
Changes to all ol.Objects can be observed by calling the object.on('propertychange') method. Listeners receive an ol.Object.Event with information on the changed property and old value. |
ol.Geolocation ol.Overlay |
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 of constants
Within a major release series, the API will not be changed. Any changes to the API will be accompanied by a new major release.
Note: The API change policy does not cover CSS class names that are used to style the OpenLayers UI.
Note for Closure Compiler users compiling their application code together with OpenLayers:
The names of types other than those in the list above (e.g. ol.Coordinate) are subject to change. It
is therefore recommended to either use the resolved type as listed in the API docs (e.g.
Array.<number> instead of ol.Coordinate), or pay attention to the upgrade notes, which will list
the changes for those types.