<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Linda Rawson Test Case</title><link
href="http://www.openlayers.org/api/theme/default/style.css"
rel="stylesheet" type="text/css">
<style>
#map {
width: 720px;
height: 720px;
border: 1px solid #4B3624;
background: White;
}
.olControlAttribution { bottom: 0px!important }
</style>
<script src="http://www.openlayers.org/api/OpenLayers.js" type="text/javascript"></script>
<script src='http://maps.google.com/maps?file=api&v=2&key=ABQIAAAAjpkAC9ePGem0lIq5XcMiuhR_wWLPFku8Ix9i2SXYRVK3e45q1BQUd_beF8dtzKET_EteAjPdGDwqpQ'></script>
<script type="text/javascript">
var map;
// avoid pink tiles
OpenLayers.IMAGE_RELOAD_ATTEMPTS = 3;
OpenLayers.Util.onImageLoadErrorColor = "transparent";
var vectorLayer, markerLayer, newPoint;
function init(){
var options = {
projection: new OpenLayers.Projection("EPSG:900913"),
//displayProjection: new OpenLayers.Projection("EPSG:4326"),
units: "m",
numZoomLevels: 19,
maxResolution: 156543.0339,
maxExtent: new OpenLayers.Bounds(-20037508, -20037508,
20037508, 20037508.34)
};
map = new OpenLayers.Map('map', options);
// create Google Mercator layers
var gmap = new OpenLayers.Layer.Google(
"Google Streets",
{'sphericalMercator': true}
);
map.addLayer(gmap);
map.addControl(new OpenLayers.Control.Navigation());
map.addControl(new OpenLayers.Control.MousePosition());
vectorLayer = new OpenLayers.Layer.Vector("Trails");
markerLayer = new OpenLayers.Layer.Markers("WayPoints");
vectorLayer.renderer.inValidRange = function() {
return true;
};
vectorLayer.renderer.drawFeature = function(feature, style) {
if(!feature.geometry.intersects(feature.layer.map.getExtent().toGeometry())) {
return;
}
OpenLayers.Renderer.prototype.drawFeature.apply(this, arguments);
};
map.addLayers([vectorLayer,markerLayer]);
var style_trail = OpenLayers.Util.extend({}, OpenLayers.Feature.Vector.style['default']);
style_trail.strokeColor = "green";
style_trail.strokeWidth = 5;
var pointList = [];
newPoint = new OpenLayers.Geometry.Point(-13653735.8487833,5726045.3578081);
pointList.push(newPoint);
newPoint = new OpenLayers.Geometry.Point(-13653731.3960036,5726056.5070679);
pointList.push(newPoint);
newPoint = new OpenLayers.Geometry.Point(-13653730.8394062,5726044.7207079);
pointList.push(newPoint);
newPoint = new OpenLayers.Geometry.Point(-13653743.1958697,5726043.9243328);
pointList.push(newPoint);
newPoint = new OpenLayers.Geometry.Point(-13653754.1051798,5726046.9505586);
pointList.push(newPoint);
newPoint = new OpenLayers.Geometry.Point(-13653760.4503907,5726056.5070679);
pointList.push(newPoint);
newPoint = new OpenLayers.Geometry.Point(-13653767.4635187,5726065.5857612);
pointList.push(newPoint);
newPoint = new OpenLayers.Geometry.Point(-13653830.136392,5726052.2066375);
pointList.push(newPoint);
newPoint = new OpenLayers.Geometry.Point(-13653846.5003571,5726042.3315828);
pointList.push(newPoint);
var lineFeature = new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.LineString(pointList));
lineFeature.fid = 52730;
vectorLayer.addFeatures(lineFeature);
pointList = [];
newPoint = new OpenLayers.Geometry.Point(-12250153.3626406,4852001.6114048);
pointList.push(newPoint);
newPoint = new OpenLayers.Geometry.Point(-12194315.5060664,4800503.5113048);
pointList.push(newPoint);
newPoint = new OpenLayers.Geometry.Point(-12180445.0975155,4873109.008858);
pointList.push(newPoint);
lineFeature = new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.LineString(pointList),null,style_trail);
lineFeature.fid = 52751;
vectorLayer.addFeatures([lineFeature]);
var size = new OpenLayers.Size(15, 15);
var offset = new OpenLayers.Pixel(-(size.w/2), -size.h);
var icon = new
OpenLayers.Icon('http://boston.openguides.org/markers/AQUA.png', size,
offset);
markerLayer.addMarker(new OpenLayers.Marker(new
OpenLayers.LonLat((newPoint.x + 400), (newPoint.y - 400)), icon));
map.setCenter(new OpenLayers.LonLat(newPoint.x, newPoint.y), 13)
}
function zoomToScale(zoom) {
if (zoom == 8) map.zoomToScale(3385.5001275);
else if(zoom == 7) map.zoomToScale(6771.000255);
else if (zoom == 6) map.zoomToScale(13542);
else if (zoom == 5) map.zoomToScale(27084.001020);
else if (zoom == 4) map.zoomToScale(54168.001020);
else if (zoom == 3) map.zoomToScale(108337);
else if (zoom == 2) map.zoomToScale(3466752.1306573446);
else if (zoom == 1) map.zoomToScale(13867008.522629378);
else if (zoom == 0) map.zoomToScale(55468034.09051751);
}
</script>
</head>
<body onLoad="init()">
<h1 id="title">Linda's Example. Push Zoom 5. You see lines. Push
Zoom 6. No lines.</h1>
<div id="map">
</div>
<button onClick="zoomToScale(5);">Zoom 5</button>
<button onClick="zoomToScale(6);">Zoom 6</button>
<button onClick="zoomToScale(7);">Zoom 7</button>
<button onClick="zoomToScale(8);">Zoom 8</button>
</body>
</html>