OpenLayers.Control.OverviewMap

{OpenLayers.Map} A reference to the overview map itself.

{OpenLayers.Size} The overvew map size in pixels.  Note that this is the size of the map itself - the element that contains the map (default class name olControlOverviewMapElement) may have padding or other style attributes added via CSS.

{Array(OpenLayers.Layer)} Ordered list of layers in the overview map.  If none are sent at construction, the base layer for the main map is used.

{Integer} The minimum width or height (in pixels) of the extent rectangle on the overview map.  When the extent rectangle reaches this size, it will be replaced depending on the value of the minRectDisplayClass property.  Default is 15 pixels.

{String} Replacement style class name for the extent rectangle when minRectSize is reached.  This string will be suffixed on to the displayClass.  Default is “RectReplacement”.

Example CSS declaration

.olControlOverviewMapRectReplacement {
    overflow: hidden;
    cursor: move;
    background-image: url("img/overview_replacement.gif");
    background-repeat: no-repeat;
    background-position: center;
}

{Float} The ratio of the overview map resolution to the main map resolution at which to zoom farther out on the overview map.

{Float} The ratio of the overview map resolution to the main map resolution at which to zoom farther in on the overview map.

{Object} An object containing any non-default properties to be sent to the overview map’s map constructor.  These should include any non-default options that the main map was constructed with.

{Boolean} Always pan the overview map, so the extent marker remains in the center.  Default is false.  If true, when you drag the extent marker, the overview map will update itself so the marker returns to the center.