Hi,
I'm using 5 layers and passing random values to VIEWPARAMS to select the
wanted area. I added a layer switcher(mentioned in red at the bottom of the
script) to show/hide layers. but switch layer component doesn't appear on
openlayers map viewer. Please be kind to respond. need help.
Regards.
<script src="wms_files/OpenLayers.js" type="text/javascript"></script>
<script defer="defer" type="text/javascript">
var legs = "<%= geoParam %>";
var layer_one_legs = "<%= geoParamLayerOne %>";
var layer_two_legs = "<%= geoParamLayerTwo %>";
var layer_three_legs = "<%= geoParamLayerThree %>";
var layer_four_legs = "<%= geoParamLayerFour %>";
var layer_four_five = "<%= geoParamLayerFive %>";
var map;
var base;
var layer_one;
var layer_two;
var layer_three;
var layer_four;
var layer_five;
/* pink tile avoidance */
OpenLayers.IMAGE_RELOAD_ATTEMPTS = 5;
/* make OL compute scale according to WMS spec */
OpenLayers.DOTS_PER_INCH = 25.4 / 0.28;
function init() {
format = 'image/png';
var bounds = new OpenLayers.Bounds(
97057.023,
174768.406,
118472.391,
192859.141);
var options = {
controls : [],
maxExtent : bounds,
maxResolution : 83.65378125000001,
projection : "EPSG:2020",
units : 'm'
};
map = new OpenLayers.Map('map', options);
/* setup base layer */
base = new OpenLayers.Layer.WMS(
"Base",
"http://localhost:8080/geoserver/wms";,
{
LAYERS : 'rda2',
transparent: "true",
singleTile: true,
format : format
},
{
buffer : 0,
isBaseLayer : true,
displayInLayerSwitcher:false
});
/* setup layer_one */
layer_one = new OpenLayers.Layer.WMS(
"Layer 01",
"http://localhost:8080/geoserver/wms";,
{
VIEWPARAMS: layer_one_legs,
LAYERS : 'RDA2_VIEW_LAYER_ONE',
transparent: "true",
singleTile: true,
format : format
},
{
buffer : 0,
isBaseLayer : false,
displayInLayerSwitcher:true
});
/* setup layer_two */
layer_two = new OpenLayers.Layer.WMS(
"Layer 02",
"http://localhost:8080/geoserver/wms";,
{
VIEWPARAMS: layer_two_legs,
LAYERS : 'RDA2_VIEW_LAYER_TWO',
transparent: "true",
singleTile: true,
format : format
},
{
buffer : 0,
isBaseLayer : false,
displayInLayerSwitcher:true
});
/* setup layer_three */
layer_three = new OpenLayers.Layer.WMS(
"Layer 03",
"http://localhost:8080/geoserver/wms";,
{
VIEWPARAMS: layer_three_legs,
LAYERS : 'RDA2_VIEW_LAYER_THREE',
transparent: "true",
singleTile: true,
format : format
},
{
buffer : 0,
isBaseLayer : false,
displayInLayerSwitcher:true
});
/* setup layer_four */
layer_four = new OpenLayers.Layer.WMS(
"Layer 04",
"http://localhost:8080/geoserver/wms";,
{
VIEWPARAMS: layer_four_legs,
LAYERS : 'RDA2_VIEW_LAYER_FOUR',
transparent: "true",
singleTile: true,
format : format
},
{
buffer : 0,
isBaseLayer : false,
displayInLayerSwitcher:true
});
/* setup layer_five */
layer_five = new OpenLayers.Layer.WMS(
"Layer 05",
"http://localhost:8080/geoserver/wms";,
{
VIEWPARAMS: layer_four_five,
LAYERS : 'RDA2_VIEW_LAYER_FIVE',
transparent: "true",
singleTile: true,
format : format
},
{
buffer : 0,
isBaseLayer : false,
displayInLayerSwitcher:true
});
/* map.addLayers([untiled, tiled ]); */
map.addLayers([base, layer_five, layer_four, layer_three, layer_two,
layer_one]);
/* build up all controls */
map.addControl(new OpenLayers.Control.PanZoomBar(
{
position : new OpenLayers.Pixel(2,15)
}));
map.addControl(new OpenLayers.Control.Navigation());
map.addControl(new OpenLayers.Control.LayerSwitcher());
map.zoomToExtent(bounds);
}
</script>
--
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