Hallo,
I want connect OpenLayers with a non WMS-map programm. I wrote a
little php-Script as a bridge to this map-programm and Im able to
request.
I can zoom-in and pan in this map but Im unable to zoom-out. I think I
dont understand the logic of the boundig-box of OpenLayers.
I add a Image-Layer to OpenLayers and register an zoom/move-Event to
this map to request the new coordinates.
If the script get the event - it throws the function showmap (its al
little bit Ajax) and I send this new coordinates to the map-server and
get a array with picture-url and bbox-coordinates back. My problem is
the understanding of
layerExt and why I cant zoom-out.
Thank You for help me out.
Thomas
Here is the code:
function init(){
map = new OpenLayers.Map('map',{controls: [
new OpenLayers.Control.Navigation(),
new OpenLayers.Control.PanZoom(),
new OpenLayers.Control.MousePosition()
] });
//GIS-Karte Layer init - without picture
var layerExt=new OpenLayers.Bounds(10.0,10.0,1000.0,1000.0);
var layerSize=new OpenLayers.Size(500,500);
layer=new OpenLayers.Layer.Image("GISDienstLayer","no-
pic.jpg",layerExt,layerSize);
map.addLayer(layer);
map.events.register("moveend", this, function() {
if (!noaction){
boundobj=this.map.getExtent();
bbox=boundobj.toArray();
lux=bbox[0];
luy=bbox[1];
rox=bbox[2];
roy=bbox[3];
noaction=true;
showmap();
}
}
);
}
function showmap(){
var anfrage=getXMLObject();
anfrage.open("POST","gismap.php",true);
anfrage.onreadystatechange=function(){
if (anfrage.readyState==4){
if (anfrage.status==200){
var antwort=anfrage.responseText;
pgAntwort=antwort.split("\t");
//destroy old layer
map.removeLayer(layer);
//Extent BBox of the actual Picture
picurl=pgAntwort[0];
lux = parseFloat(pgAntwort[2]);
luy = parseFloat(pgAntwort[3]);
rox = parseFloat(pgAntwort[4]);
roy = parseFloat(pgAntwort[5]);
//maybe here is the problem
var layerExt=new
OpenLayers.Bounds(pgAntwort[2],pgAntwort[3],pgAntwort[4],pgAntwort[5]);
var layerSize=new OpenLayers.Size(500,500);
layer=new
OpenLayers.Layer.Image("GISDienstLayer",picurl,layerExt,layerSize);
map.addLayer(layer);
//whats that?
map.maxExtent= new
OpenLayers.Bounds(4000000,5000000,5000000,6000000);
map.zoomToMaxExtent();
noaction=false;
}
}
}
anfrage.setRequestHeader ("Content-Type", "application/x-www-form-
urlencoded");
anfrage.send("cmd=getmap&lux="+escape(lux)+"&luy="+escape(luy)
+"&rox="+escape(rox)+"&roy="+escape(roy));
}
_______________________________________________
Users mailing list
[email protected]
http://openlayers.org/mailman/listinfo/users
