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<html>
<head>
<script src="../OLLoader.js"></script>
<script type="text/javascript">
function test_SphericalMercator_forwardMercator(t) {
t.plan(12);
var arctic = OpenLayers.Layer.SphericalMercator.forwardMercator(0, 85);
var antarctic = OpenLayers.Layer.SphericalMercator.forwardMercator(0, -85);
var hawaii = OpenLayers.Layer.SphericalMercator.forwardMercator(-180, 0);
var phillipines = OpenLayers.Layer.SphericalMercator.forwardMercator(180, 0);
var ne = OpenLayers.Layer.SphericalMercator.forwardMercator(180, 90);
var sw = OpenLayers.Layer.SphericalMercator.forwardMercator(-180, -90);
t.eq(arctic.lon, 0, "Arctic longitude is correct");
t.eq(Math.round(arctic.lat), 19971869, "Arctic latitude is correct");
t.eq(antarctic.lon, 0, "Antarctic longitude is correct");
t.eq(Math.round(antarctic.lat), -19971869, "Antarctic latitude is correct");
t.eq(Math.round(hawaii.lat), 0, "Hawaiian lat is correct");
t.eq(hawaii.lon, -20037508.34, "Hawaiian lon is correct");
t.eq(Math.round(phillipines.lat), 0, "Phillipines lat is correct");
t.eq(phillipines.lon, 20037508.340, "Phillipines lon is correct");
// be kind and stay within the world instead of having +/- infinity lat
t.ok(ne.lat, 20037508.34, "NE lat is correct");
t.eq(ne.lon, 20037508.34, "NE lon is correct");
t.eq(sw.lat, -20037508.34, "SW lat is correct");
t.eq(sw.lon, -20037508.34, "SW lon is correct");
}
function test_sphericalMercator_inverseMercator(t) {
t.plan(4);
var sw = OpenLayers.Layer.SphericalMercator.inverseMercator(-20037508.34, -20037508.34);
var ne = OpenLayers.Layer.SphericalMercator.inverseMercator(20037508.34, 20037508.34);
t.eq(sw.lon, -180, "Southwest lon correct");
t.eq(ne.lon, 180, "Northeast lon correct");
t.eq(sw.lat.toFixed(10), "-85.0511287798", "Southwest lat correct");
t.eq(ne.lat.toFixed(10), "85.0511287798", "Northeast lat correct");
}
function strToFixed(str, dig) {
if(dig == undefined) {
dig = 5;
}
return str.replace(/(\d+\.\d+)/g, function(match) {
return parseFloat(match).toFixed(dig);
});
}
function test_SphericalMercator_to4326(t) {
t.plan(1);
var point = new OpenLayers.Geometry.Point(1113195, 2273031);
point.transform("EPSG:900913", "EPSG:4326");
t.eq(strToFixed(point.toString()),
strToFixed("POINT(10.000000828446318 20.000000618997227)"),
"point transforms from Spherical Mercator to EPSG:4326");
}
function test_SphericalMercator_addTransform(t) {
// this class should add two methods to the
// OpenLayers.Projection.transforms object
t.plan(4);
var wgs84 = OpenLayers.Projection.transforms["EPSG:4326"];
t.ok(wgs84 instanceof Object, "EPSG:4326 exists in table");
var smerc = OpenLayers.Projection.transforms["EPSG:900913"];
t.ok(smerc instanceof Object, "EPSG:900913 exists in table");
t.ok(typeof(wgs84["EPSG:900913"]) === "function",
"from EPSG:4326 to EPSG:900913 correctly defined");
t.ok(typeof(smerc["EPSG:4326"]) === "function",
"from EPSG:900913 to EPSG:4326 correctly defined");
}
function test_equivalence(t) {
// list of equivalent codes for web mercator
var codes = ["EPSG:900913", "EPSG:3857", "EPSG:102113", "EPSG:102100"];
var len = codes.length;
t.plan(len + (len * len));
var ggPoint = new OpenLayers.Geometry.Point(10, 20);
var smPoint = new OpenLayers.Geometry.Point(1113195, 2273031);
var gg = new OpenLayers.Projection("EPSG:4326");
var i, proj, forward, inverse, other, j, equiv;
for (i=0, len=codes.length; i<len; ++i) {
proj = new OpenLayers.Projection(codes[i]);
// confirm that forward/inverse work
forward = ggPoint.clone().transform(gg, proj);
t.eq(
strToFixed(forward.toString()),
strToFixed("POINT(1113194.9077777779 2273030.9266712805)"),
"transforms from EPSG:4326 to " + proj
);
inverse = smPoint.clone().transform(proj, gg);
t.eq(
strToFixed(inverse.toString()),
strToFixed("POINT(10.000000828446318 20.000000618997227)"),
"transforms from " + proj + " to EPSG:4326"
);
// confirm that null transform works
for (j=i+1; j<len; ++j) {
other = new OpenLayers.Projection(codes[j]);
equiv = ggPoint.clone().transform(proj, other);
t.ok(proj.equals(other), proj + " and " + other + " are equivalent");
t.ok(ggPoint.equals(equiv), "transform from " + proj + " to " + other + " preserves geometry");
}
}
}
</script>
</head>
<body>
</body>
</html>
|
