Thanks for advice Charles. I tried what you suggested but get a blank map
still. I moved the extent declaration above the options but do they need to
be inside the function or outside?
For the record I have tried both methods. As you can probably tell I'm a new
to javascript.
Thanks
Matt
var map;
// Avoid pink error tiles
OpenLayers.IMAGE_RELOAD_ATTEMPTS = 3;
OpenLayers.Util.onImageLoadErrorColor = "transparent";
var extent = new OpenLayers.Bounds(-7.423, 50.102,
-0.383, 60.988).transform(
new OpenLayers.Projection("EPSG:4326),
new OpenLayers.Projection("EPSG:900913)
);
function init(){
// Map is in mercator this time, so over-ride the default
// options that assume lat/lon.
var options = {
projection: new OpenLayers.Projection("EPSG:900913"),
displayProjection: new OpenLayers.Projection("EPSG:4326"),
units: "m",
numZoomLevels: 20,
maxResolution: 156543.0339,
maxExtent: extent
};
// Create the map object
map = new OpenLayers.Map('map', options);
// create Google Maps layer
var gmap = new OpenLayers.Layer.Google(
"Google Streets", // the default
{'sphericalMercator': true, numZoomLevels: 20}
);
// create Google Satellite layer
var gsat = new OpenLayers.Layer.Google(
"Google Satellite",
{type: G_SATELLITE_MAP, 'sphericalMercator': true, numZoomLevels: 20}
);
// create WMS Atrina layer
var wmslayer = new OpenLayers.Layer.WMS(
"Atrina",
"http://localhost:8080/geoserver/wms";,
{'layers': 'DASSH:Atrina', 'format':'image/png',
'transparent':'true'},
{'opacity': 1.0, 'isBaseLayer': false, 'visibility': true}
);
map.addLayers([gmap, gsat, wmslayer]);
map.addControl(new OpenLayers.Control.LayerSwitcher());
map.addControl(new OpenLayers.Control.MousePosition());
map.zoomToMaxExtent()
}
-------------------------------------------------------------------------------------------------------------------------------
-------------------------------------------------------------------------------------------------------------------------------
On Sat, Dec 4, 2010 at 3:34 PM, Charles Galpin <[email protected]> wrote:
> Matt, try setting the maxExtent of the map. Move the declaration of extent
> to above the options and add
>
> maxExtent: extent,
>
> to the options.
>
> hth,
> charles
>
> On Dec 4, 2010, at 10:00 AM, Matt Travis wrote:
>
> Hi all
>
> I'm trying to start a map using the following function. I want to open
> using some prescribed bounds that are in long, lat (ESPG:4326) but i'm
> using google maps for the baselayer so the projection is EPSG:900913. I
> thought the following code would work ok but it just loads a blank map.
>
> Regards
>
> Matt
>
>
> function init(){
> // Map is in mercator this time, so over-ride the default
> // options that assume lat/lon.
> var options = {
> projection: new OpenLayers.Projection("EPSG:900913"),
>
> displayProjection: new OpenLayers.Projection("EPSG:4326"),
>
> units: "m",
>
> numZoomLevels: 20,
>
> maxResolution: 156543.0339,
>
> };
>
> var extent = new OpenLayers.Bounds(-7.423, 50.102,
> -0.383, 60.988).transform(
> new OpenLayers.Projection("EPSG:4326),
> new OpenLayers.Projection("EPSG:900913)
>
> );
>
> // Create the map object
> map = new OpenLayers.Map('map', options);
>
> // create Google Maps layer
> var gmap = new OpenLayers.Layer.Google(
> "Google Streets", // the default
> {'sphericalMercator': true, numZoomLevels: 20}
> );
>
> // create Google Satellite layer
> var gsat = new OpenLayers.Layer.Google(
> "Google Satellite",
> {type: G_SATELLITE_MAP, 'sphericalMercator': true, numZoomLevels: 20}
> );
>
> // create WMS Atrina layer
> var wmslayer = new OpenLayers.Layer.WMS(
> "Atrina",
> "http://localhost:8080/geoserver/wms";,
> {'layers': 'DASSH:Atrina', 'format':'image/png',
> 'transparent':'true'},
> {'opacity': 1.0, 'isBaseLayer': false, 'visibility': true}
> );
>
> map.addLayers([gmap, gsat, wmslayer]);
> map.addControl(new OpenLayers.Control.LayerSwitcher());
> // Coordinate display at bottom of map
> map.addControl(new OpenLayers.Control.MousePosition());
> map.setCenter(extent, 5);
>
> }
> _______________________________________________
> Users mailing list
> [email protected]
> http://lists.osgeo.org/mailman/listinfo/openlayers-users
>
>
>
_______________________________________________
Users mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/openlayers-users
