GeoExt is Open Source and enables building desktop-like GIS applications through the web. It is a JavaScript framework that combines the GIS functionality of OpenLayers with the user interface of the ExtJS library provided by Sencha.

GeoExt 2.1.0 is built atop OpenLayers 2.13.1 and ExtJS 5.1.0 and provides full backward compatibility to ExtJS 4.2.1. So GeoExt 2.1 is usable either with ExtJS 5.1 or Ext 4.2.1. GeoExt 2.0.x is based on OpenLayers 2.13.1 and ExtJS 4.2.1 and is maintained in the v2.0.x-maintenance Branch.

About GeoExt

Since version 2.1.0, GeoExt is based upon ExtJS 4 and ExtJS 5.

This means GeoExt can be used just like any other Ext 4/5 component, and applications making use of GeoExt 2.1 also profit from Ext JS enhancements like charting, a harmonized API with Sencha Touch, support for the MVVM-Pattern, 2-way-binding and a sophisticated single-file build tool.

GeoExt 2 has been in the making for a long time, though most of the code has been written during a code sprint back in May 2012. We are deeply grateful that our sponsors helped make GeoExt 2 happen.

Now, have a look at the examples below, read the API documentation, the API documentation (including ExtJS 4 classes) API documentation (including ExtJS 5 classes) or checkout the code.

A screenshot of a MVC-example built with GeoExt

Action

A GeoExt.Action is created to insert an OpenLayers control in a toolbar as a button or in a menu as a menu item.

MVC Application

A simple complete MVC application example called CF (Cartography Framework).

Geocoder

Creates a combo box that handles results from a geocoding service. By default it uses OSM Nominatim.

Feature Grid

An Ext.grid.Panel loaded with features read from a GeoJSON document.

Layer Opacity Slider

The LayerOpacitySlider allows control of a layer opacity using an Ext.Slider.

Legend Panel

Create a LegendPanel that is autopopulated with legends from a map that has already been created.

MapPanel

Create a simple GeoExt.panel.Map container for a map.

Various Overviewmaps

Showcases different varants of Overviewmaps

Basic Overviewmap

Showthe use of the Overviewmap class

Permalink

Generate permalinks with the current map position and visible layers.

Popup

A popup is a specialized window that supports anchoring to a particular location in a MapPanel.

Print Extent

Set the bounds of a printable PDF interactively with a dynamic print extent rectangle. It requires the MapFish or GeoServer print module.

PrintPreview

How to create a printable PDF with GeoExt.data.MapfishPrintProvider and GeoExt.PrintMapPanel.

Renderer

The FeatureRenderer renderers arbitrary OpenLayers.Feature.Vector objects given a list of symbolizers.

Style Grid

The StyleReader populates a store with records representing rules of a Style or the entries of a ColorMap, so they can easily be shown in a grid.

LayerTree

This example shows how to work with a layer tree.

LegendTree

This example shows how to add legends to the layer nodes in a tree.

WFS Capabilities

Load a grid with data from a WFS capabilities document.

WMS Capabilities

Load a grid with data from a WMS capabilities document.

Zoom Chooser

This example demonstrates the use of a GeoExt.data.ScaleStore to list the available zoom levels for a map.

Zoom Slider

Allows control of the map scale using an Ext.slider.SingleSlider.

What about GeoExt 1.x?

Of course you can still use GeoExt 1.x.

We will still be fixing bugs in the 1.x-series, but our development will mainly focus on GeoExt 2 and above.

Consider using the new and shiny GeoExt 2 when you decide to refactor your code or start a new project. As we strived for a very harmonized API between GeoExt 1 and 2, upgrading shouldn't be too hard.

GeoExt 2