Edit feature example

This example lets the user to draw, modify and delete features. When drawing, it works as the normal DrawFeature control in OpenLayers, with two differences:

• If you press the "DELETE" key, the last added vertix will be removed.
• If you press the "ESCAPE" key, the drawing will finish and the feature will be selected to modify. This allows the user to finish the drawing of the feature even if he forgets to double-click when adding the last point.