var numZoomLevels = Math.max(mapnik.numZoomLevels, osmarender.numZoomLevels);
markers = new OpenLayers.Layer.Markers("Markers", {
var numZoomLevels = Math.max(mapnik.numZoomLevels, osmarender.numZoomLevels);
markers = new OpenLayers.Layer.Markers("Markers", {
maxExtent: new OpenLayers.Bounds(-20037508,-20037508,20037508,20037508),
maxResolution: 156543,
units: "m",
maxExtent: new OpenLayers.Bounds(-20037508,-20037508,20037508,20037508),
maxResolution: 156543,
units: "m",