API Reference

The Geoportal Extension for Leaflet provides additionnal javascript functionalities (Coordinate Reference Systems, Layers and Controls) making access to french geoportal webservices more easier when using Leaflet javascript library.

This extension is not standalone and has to be used together with Leaflet library. In a web page, you thus have to include both Leaflet and Geoportal Extension resources. For instance :

<!-- Leaflet -->
<link rel="stylesheet" href="path/to/leaflet.css" />
<script src="path/to/leaflet.js"></script>

<!-- Geoportal Extension for Leaflet -->
<script src="path/to/GpPluginLeaflet.js" data-key="{your-geoportal-access-key}"></script>
<link rel="stylesheet" href="path/to/GpPluginLeaflet.css" />

NB : to have complete access to this extension functionnalities, you need to freely provide a geoportal access key among the one available here : . Use it either when loading extension script (using the data-key attribute) or by conditinning their use to the onSuccess callback function of a Gp.Services.GetConfig() call with that key. Otherwhise some functionalities may not work as announced.

Geoportal CRS

Additionnaly to built in Leaflet Coordinate Reference Systems (CRS) the Geoportal Extension provides Lambert 93 (EPSG:2154) CRS definition, useful for Lambert 93 WMTS Geoportal Layers display.

The integration of Proj4Leaflet and Proj4js libraries in the Geoportal extension allows developpers to define further CRS if they need.

Geoportal Layers

Layers provided by the Geoportal Extension are additionnal Leaflet tiled layers that can be added to an Leaflet Map like any other Leaflet layer.

Geoportal Controls

Controls provided by the Geoportal Extension are additionnal Leaflet controls that, when added to an Leaflet Map, allows user to interact with it.