Metacat

// global variables for the map

var map;

var control;

function initMap(GEOSERVER_URL, SERVLET_URL, qformat, bounds) {

	if (!bounds) {

		bounds = new OpenLayers.Bounds(-180,-90,180,90);

	}

    map = new OpenLayers.Map('map', { 'maxExtent':bounds, 'maxResolution':'auto'});

    var metacat_points = new OpenLayers.Layer.WMS( "Metacat Doc Points",

        GEOSERVER_URL + "/wms",

        {layers: "data_points",

         transparent: "true", format: "image/gif"} );

    var metacat_bounds = new OpenLayers.Layer.WMS( "Metacat Doc Bounds",

    	GEOSERVER_URL + "/wms",

        {layers: "data_bounds",

         transparent: "true", format: "image/gif"} );

    var world_borders = new OpenLayers.Layer.WMS( "World Borders",

    	GEOSERVER_URL + "/wms",

        {layers: "world_borders",

         format: "image/jpeg"} );

    var sanparks_boundaries = new OpenLayers.Layer.WMS( "SANParks Boundaries",

    		GEOSERVER_URL + "/wms",

            {layers: "SANParks_Boundaries_gcs_wgs84",

             transparent: "true", format: "image/gif"} );

    /*

     *   Other possible WMS base layers to include

     */

        "http://labs.metacarta.com/wms/vmap0",

        {layers: 'basic'} );

        "http://wms.jpl.nasa.gov/wms.cgi",

        {layers: "modis,global_mosaic"});

        "http://www2.demis.nl/WMS/wms.asp?wms=WorldMap",

        {layers: 'Bathymetry,Countries,Topography,Hillshading,Coastlines,Waterbodies,Inundated,Rivers,Streams,Builtup+areas,Railroads,Highways,Roads,Trails,Borders,Cities,Settlements,Airports'} );

    ol_wms.setVisibility(false);

    demis.setVisibility(false);

	map.addControl(new OpenLayers.Control.MouseToolbar());

    map.addControl(new OpenLayers.Control.LayerSwitcher());

    map.addControl(new OpenLayers.Control.MousePosition());

    // get the drag box event

	control = new OpenLayers.Control();

	OpenLayers.Util.extend(

			control, {

			    draw: function () {

			        // this Handler.Box will intercept the shift-mousedown

			        // before Control.MouseDefault gets to see it

			        this.box = new OpenLayers.Handler.Box( control,

			            {"done": this.notice}

		            	//,{keyMask: OpenLayers.Handler.MOD_SPACE}

	            	);

			        this.box.activate();

			    },

			    notice: function (bounds) {

			    	var min_px;

			        var max_px;

			        // check that it is a rectangle

			        if (bounds.left) {

				        min_px = new OpenLayers.Pixel( bounds.left, bounds.bottom);

				        max_px = new OpenLayers.Pixel( bounds.right, bounds.top);

					} else {

						var tolerance = new OpenLayers.Pixel(3, 3);

					    min_px = new OpenLayers.Pixel( bounds.x - tolerance.x, bounds.y + tolerance.y);

					    max_px = new OpenLayers.Pixel( bounds.x + tolerance.x, bounds.y - tolerance.y);

					}

			        var min_ll = map.getLonLatFromPixel(min_px);

			        var max_ll = map.getLonLatFromPixel(max_px);

			      	//alert("longitude: " + round(mid_ll.lon,3) + " , latitude: " + round(mid_ll.lat,3) );

				    url = SERVLET_URL + '?action=spatial_query&xmin='+min_ll.lon+'&ymin='+min_ll.lat+'&xmax='+max_ll.lon+'&ymax='+max_ll.lat+'&skin=' + qformat;

				    OpenLayers.ProxyHost = '';

				    newwindow =

					    window.open(

							    url,

							    'queryWin',

				                'height=600,width=800,status=yes,toolbar=yes,menubar=no,location=yes,resizable=yes,scrollbars=yes');

			    }

	});

	map.addControl(control);

	// zoom to center

    if (!map.getCenter()) {

         map.zoomToMaxExtent();

    }

}

// for named location navigation

function zoomToLocation(locations) {

	var selectedLocation = locations.options[locations.selectedIndex].value;

	// add a comma for the rectangle

	selectedLocation = selectedLocation.replace(" ", ",")

	var bounds = OpenLayers.Bounds.fromString(selectedLocation);

    map.zoomToExtent(bounds);

}