520 lines
18 KiB
JavaScript
520 lines
18 KiB
JavaScript
goog.provide('ol.test.proj');
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describe('ol.proj', function() {
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afterEach(function() {
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ol.proj.clearAllProjections();
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ol.proj.common.add();
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});
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describe('projection equivalence', function() {
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function _testAllEquivalent(codes) {
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var projections = goog.array.map(codes, ol.proj.get);
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goog.array.forEach(projections, function(source) {
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goog.array.forEach(projections, function(destination) {
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expect(ol.proj.equivalent(source, destination)).to.be.ok();
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});
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});
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}
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it('gives that 3857, 102100, 102113, 900913 are equivalent ', function() {
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_testAllEquivalent([
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'EPSG:3857',
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'EPSG:102100',
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'EPSG:102113',
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'EPSG:900913'
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]);
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});
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it('gives that custom 3413 is equivalent to self', function() {
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var code = 'EPSG:3413';
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var source = new ol.proj.Projection({
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code: code
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});
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var destination = new ol.proj.Projection({
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code: code
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});
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expect(ol.proj.equivalent(source, destination)).to.be.ok();
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});
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it('gives that default 3857 is equivalent to self', function() {
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_testAllEquivalent([
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'EPSG:3857',
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'EPSG:3857'
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]);
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});
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it('gives that CRS:84, urn:ogc:def:crs:EPSG:6.6:4326, EPSG:4326 are ' +
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'equivalent', function() {
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_testAllEquivalent([
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'CRS:84',
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'urn:ogc:def:crs:EPSG:6.6:4326',
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'EPSG:4326'
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]);
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});
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});
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describe('identify transform', function() {
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it('returns a new object, with same coord values', function() {
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var epsg4326 = ol.proj.get('EPSG:4326');
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var uniqueObject = {};
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var sourcePoint = [uniqueObject, uniqueObject];
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var destinationPoint = ol.proj.transform(
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sourcePoint, epsg4326, epsg4326);
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expect(sourcePoint === destinationPoint).to.not.be();
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expect(destinationPoint[0] === sourcePoint[0]).to.be.ok();
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expect(destinationPoint[1] === sourcePoint[1]).to.be.ok();
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});
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});
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describe('transform 0,0 from 4326 to 3857', function() {
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it('returns expected value', function() {
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var point = ol.proj.transform([0, 0], 'EPSG:4326', 'EPSG:3857');
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expect(point).not.to.be(undefined);
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expect(point).not.to.be(null);
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expect(point[1]).to.roughlyEqual(0, 1e-9);
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});
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});
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describe('transform 0,0 from 3857 to 4326', function() {
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it('returns expected value', function() {
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var point = ol.proj.transform([0, 0], 'EPSG:3857', 'EPSG:4326');
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expect(point).not.to.be(undefined);
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expect(point).not.to.be(null);
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expect(point[0]).to.eql(0);
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expect(point[1]).to.eql(0);
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});
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});
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describe('transform from 4326 to 3857 (Alastaira)', function() {
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// http://alastaira.wordpress.com/2011/01/23/the-google-maps-bing-maps-spherical-mercator-projection/
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it('returns expected value using ol.proj.transform', function() {
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var point = ol.proj.transform(
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[-5.625, 52.4827802220782], 'EPSG:4326', 'EPSG:900913');
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expect(point).not.to.be(undefined);
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expect(point).not.to.be(null);
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expect(point[0]).to.roughlyEqual(-626172.13571216376, 1e-9);
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expect(point[1]).to.roughlyEqual(6887893.4928337997, 1e-8);
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});
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it('returns expected value using ol.proj.fromLonLat', function() {
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var point = ol.proj.fromLonLat([-5.625, 52.4827802220782]);
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expect(point).not.to.be(undefined);
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expect(point).not.to.be(null);
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expect(point[0]).to.roughlyEqual(-626172.13571216376, 1e-9);
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expect(point[1]).to.roughlyEqual(6887893.4928337997, 1e-8);
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});
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});
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describe('transform from 3857 to 4326 (Alastaira)', function() {
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// http://alastaira.wordpress.com/2011/01/23/the-google-maps-bing-maps-spherical-mercator-projection/
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it('returns expected value using ol.proj.transform', function() {
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var point = ol.proj.transform([-626172.13571216376, 6887893.4928337997],
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'EPSG:900913', 'EPSG:4326');
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expect(point).not.to.be(undefined);
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expect(point).not.to.be(null);
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expect(point[0]).to.roughlyEqual(-5.625, 1e-9);
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expect(point[1]).to.roughlyEqual(52.4827802220782, 1e-9);
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});
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it('returns expected value using ol.proj.toLonLat', function() {
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var point = ol.proj.toLonLat([-626172.13571216376, 6887893.4928337997]);
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expect(point).not.to.be(undefined);
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expect(point).not.to.be(null);
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expect(point[0]).to.roughlyEqual(-5.625, 1e-9);
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expect(point[1]).to.roughlyEqual(52.4827802220782, 1e-9);
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});
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});
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describe('canWrapX()', function() {
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it('requires an extent for allowing wrapX', function() {
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var proj = new ol.proj.Projection({
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code: 'foo',
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global: true
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});
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expect(proj.canWrapX()).to.be(false);
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proj.setExtent([1, 2, 3, 4]);
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expect(proj.canWrapX()).to.be(true);
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proj = new ol.proj.Projection({
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code: 'foo',
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global: true,
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extent: [1, 2, 3, 4]
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});
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expect(proj.canWrapX()).to.be(true);
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proj.setExtent(null);
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expect(proj.canWrapX()).to.be(false);
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});
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it('requires global to be true for allowing wrapX', function() {
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var proj = new ol.proj.Projection({
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code: 'foo',
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extent: [1, 2, 3, 4]
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});
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expect(proj.canWrapX()).to.be(false);
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proj.setGlobal(true);
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expect(proj.canWrapX()).to.be(true);
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proj = new ol.proj.Projection({
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code: 'foo',
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global: true,
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extent: [1, 2, 3, 4]
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});
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expect(proj.canWrapX()).to.be(true);
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proj.setGlobal(false);
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expect(proj.canWrapX()).to.be(false);
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});
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});
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describe('transformExtent()', function() {
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it('transforms an extent given projection identifiers', function() {
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var sourceExtent = [-15, -30, 45, 60];
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var destinationExtent = ol.proj.transformExtent(
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sourceExtent, 'EPSG:4326', 'EPSG:3857');
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expect(destinationExtent).not.to.be(undefined);
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expect(destinationExtent).not.to.be(null);
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expect(destinationExtent[0])
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.to.roughlyEqual(-1669792.3618991037, 1e-9);
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expect(destinationExtent[2]).to.roughlyEqual(5009377.085697311, 1e-9);
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expect(destinationExtent[1]).to.roughlyEqual(-3503549.843504376, 1e-8);
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expect(destinationExtent[3]).to.roughlyEqual(8399737.889818361, 1e-8);
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});
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});
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describe('Proj4js integration', function() {
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it('creates ol.proj.Projection instance from EPSG:21781', function() {
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proj4.defs('EPSG:21781',
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'+proj=somerc +lat_0=46.95240555555556 +lon_0=7.439583333333333 ' +
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'+k_0=1 +x_0=600000 +y_0=200000 +ellps=bessel ' +
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'+towgs84=674.374,15.056,405.346,0,0,0,0 +units=m +no_defs');
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var proj = ol.proj.get('EPSG:21781');
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expect(proj.getCode()).to.eql('EPSG:21781');
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expect(proj.getUnits()).to.eql('m');
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expect(proj.getMetersPerUnit()).to.eql(1);
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delete proj4.defs['EPSG:21781'];
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});
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it('creates ol.proj.Projection instance from EPSG:3739', function() {
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proj4.defs('EPSG:3739',
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'+proj=tmerc +lat_0=40.5 +lon_0=-110.0833333333333 +k=0.9999375 ' +
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'+x_0=800000.0000101599 +y_0=99999.99998983997 +ellps=GRS80 ' +
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'+towgs84=0,0,0,0,0,0,0 +units=us-ft +no_defs');
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var proj = ol.proj.get('EPSG:3739');
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expect(proj.getCode()).to.eql('EPSG:3739');
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expect(proj.getUnits()).to.eql('us-ft');
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expect(proj.getMetersPerUnit()).to.eql(1200 / 3937);
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delete proj4.defs['EPSG:3739'];
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});
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it('allows Proj4js projections to be used transparently', function() {
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var point = ol.proj.transform(
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[-626172.13571216376, 6887893.4928337997], 'GOOGLE', 'WGS84');
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expect(point[0]).to.roughlyEqual(-5.625, 1e-9);
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expect(point[1]).to.roughlyEqual(52.4827802220782, 1e-9);
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});
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it('allows new Proj4js projections to be defined', function() {
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proj4.defs('EPSG:21781',
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'+proj=somerc +lat_0=46.95240555555556 +lon_0=7.439583333333333 ' +
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'+k_0=1 +x_0=600000 +y_0=200000 +ellps=bessel ' +
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'+towgs84=674.374,15.056,405.346,0,0,0,0 +units=m +no_defs');
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var point = ol.proj.transform([7.439583333333333, 46.95240555555556],
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'EPSG:4326', 'EPSG:21781');
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expect(point[0]).to.roughlyEqual(600072.300, 1);
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expect(point[1]).to.roughlyEqual(200146.976, 1);
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delete proj4.defs['EPSG:21781'];
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});
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it('works with ol.proj.fromLonLat and ol.proj.toLonLat', function() {
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proj4.defs('EPSG:21781',
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'+proj=somerc +lat_0=46.95240555555556 +lon_0=7.439583333333333 ' +
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'+k_0=1 +x_0=600000 +y_0=200000 +ellps=bessel ' +
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'+towgs84=674.374,15.056,405.346,0,0,0,0 +units=m +no_defs');
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var lonLat = [7.439583333333333, 46.95240555555556];
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var point = ol.proj.fromLonLat(lonLat, 'EPSG:21781');
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expect(point[0]).to.roughlyEqual(600072.300, 1);
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expect(point[1]).to.roughlyEqual(200146.976, 1);
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point = ol.proj.toLonLat(point, 'EPSG:21781');
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expect(point[0]).to.roughlyEqual(lonLat[0], 1);
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expect(point[1]).to.roughlyEqual(lonLat[1], 1);
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delete proj4.defs['EPSG:21781'];
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});
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it('caches the new Proj4js projections given their srsCode', function() {
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proj4.defs('EPSG:21781',
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'+proj=somerc +lat_0=46.95240555555556 +lon_0=7.439583333333333 ' +
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'+k_0=1 +x_0=600000 +y_0=200000 +ellps=bessel ' +
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'+towgs84=674.374,15.056,405.346,0,0,0,0 +units=m +no_defs');
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var code = 'urn:ogc:def:crs:EPSG:21781';
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var srsCode = 'EPSG:21781';
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proj4.defs(code, proj4.defs(srsCode));
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var proj = ol.proj.get(code);
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var proj2 = ol.proj.get(srsCode);
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expect(ol.proj.equivalent(proj2, proj)).to.be(true);
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delete proj4.defs[code];
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delete proj4.defs[srsCode];
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});
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it('numerically estimates point scale at the equator', function() {
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var googleProjection = ol.proj.get('GOOGLE');
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expect(googleProjection.getPointResolution(1, [0, 0])).
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to.roughlyEqual(1, 1e-1);
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});
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it('numerically estimates point scale at various latitudes', function() {
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var epsg3857Projection = ol.proj.get('EPSG:3857');
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var googleProjection = ol.proj.get('GOOGLE');
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var point, y;
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for (y = -20; y <= 20; ++y) {
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point = [0, 1000000 * y];
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expect(googleProjection.getPointResolution(1, point)).to.roughlyEqual(
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epsg3857Projection.getPointResolution(1, point), 1e-1);
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}
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});
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it('numerically estimates point scale at various points', function() {
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var epsg3857Projection = ol.proj.get('EPSG:3857');
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var googleProjection = ol.proj.get('GOOGLE');
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var point, x, y;
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for (x = -20; x <= 20; x += 2) {
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for (y = -20; y <= 20; y += 2) {
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point = [1000000 * x, 1000000 * y];
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expect(googleProjection.getPointResolution(1, point)).to.roughlyEqual(
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epsg3857Projection.getPointResolution(1, point), 1e-1);
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}
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}
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});
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});
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describe('ol.proj.getTransformFromProjections()', function() {
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it('returns a transform function', function() {
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var transform = ol.proj.getTransformFromProjections(ol.proj.get('GOOGLE'),
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ol.proj.get('EPSG:4326'));
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expect(typeof transform).to.be('function');
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var output = transform([-12000000, 5000000]);
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expect(output[0]).to.roughlyEqual(-107.79783409434258, 1e-9);
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expect(output[1]).to.roughlyEqual(40.91627447067577, 1e-9);
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});
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it('works for longer arrays', function() {
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var transform = ol.proj.getTransformFromProjections(ol.proj.get('GOOGLE'),
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ol.proj.get('EPSG:4326'));
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expect(typeof transform).to.be('function');
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var output = transform([-12000000, 5000000, -12000000, 5000000]);
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expect(output[0]).to.roughlyEqual(-107.79783409434258, 1e-9);
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expect(output[1]).to.roughlyEqual(40.91627447067577, 1e-9);
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expect(output[2]).to.roughlyEqual(-107.79783409434258, 1e-9);
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expect(output[3]).to.roughlyEqual(40.91627447067577, 1e-9);
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});
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});
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describe('ol.proj.getTransform()', function() {
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it('returns a function', function() {
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var transform = ol.proj.getTransform('GOOGLE', 'EPSG:4326');
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expect(typeof transform).to.be('function');
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});
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it('returns a transform function', function() {
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var transform = ol.proj.getTransform('GOOGLE', 'EPSG:4326');
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expect(typeof transform).to.be('function');
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var output = transform([-626172.13571216376, 6887893.4928337997]);
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expect(output[0]).to.roughlyEqual(-5.625, 1e-9);
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expect(output[1]).to.roughlyEqual(52.4827802220782, 1e-9);
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});
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it('works for longer arrays of coordinate values', function() {
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var transform = ol.proj.getTransform('GOOGLE', 'EPSG:4326');
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expect(typeof transform).to.be('function');
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var output = transform([
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-626172.13571216376, 6887893.4928337997,
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-12000000, 5000000,
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-626172.13571216376, 6887893.4928337997
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]);
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expect(output[0]).to.roughlyEqual(-5.625, 1e-9);
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expect(output[1]).to.roughlyEqual(52.4827802220782, 1e-9);
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expect(output[2]).to.roughlyEqual(-107.79783409434258, 1e-9);
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expect(output[3]).to.roughlyEqual(40.91627447067577, 1e-9);
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expect(output[4]).to.roughlyEqual(-5.625, 1e-9);
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expect(output[5]).to.roughlyEqual(52.4827802220782, 1e-9);
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});
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it('accepts an optional destination array', function() {
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var transform = ol.proj.getTransform('EPSG:3857', 'EPSG:4326');
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var input = [-12000000, 5000000];
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var output = [];
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var got = transform(input, output);
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expect(got).to.be(output);
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expect(output[0]).to.roughlyEqual(-107.79783409434258, 1e-9);
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expect(output[1]).to.roughlyEqual(40.91627447067577, 1e-9);
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expect(input).to.eql([-12000000, 5000000]);
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});
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it('accepts a dimension', function() {
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var transform = ol.proj.getTransform('GOOGLE', 'EPSG:4326');
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expect(typeof transform).to.be('function');
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var dimension = 3;
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var output = transform([
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-626172.13571216376, 6887893.4928337997, 100,
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-12000000, 5000000, 200,
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-626172.13571216376, 6887893.4928337997, 300
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], undefined, dimension);
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expect(output[0]).to.roughlyEqual(-5.625, 1e-9);
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expect(output[1]).to.roughlyEqual(52.4827802220782, 1e-9);
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expect(output[2]).to.be(100);
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expect(output[3]).to.roughlyEqual(-107.79783409434258, 1e-9);
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expect(output[4]).to.roughlyEqual(40.91627447067577, 1e-9);
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expect(output[5]).to.be(200);
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expect(output[6]).to.roughlyEqual(-5.625, 1e-9);
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expect(output[7]).to.roughlyEqual(52.4827802220782, 1e-9);
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expect(output[8]).to.be(300);
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});
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});
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describe('ol.proj.removeTransform()', function() {
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var extent = [180, -90, 180, 90];
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var units = ol.proj.Units.DEGREES;
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it('removes functions cached by addTransform', function() {
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var foo = new ol.proj.Projection({
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code: 'foo',
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units: units,
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extent: extent
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});
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var bar = new ol.proj.Projection({
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code: 'bar',
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units: units,
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extent: extent
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});
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var transform = function(input, output, dimension) {return input;};
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ol.proj.addTransform(foo, bar, transform);
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expect(ol.proj.transforms_).not.to.be(undefined);
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expect(ol.proj.transforms_.foo).not.to.be(undefined);
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expect(ol.proj.transforms_.foo.bar).to.be(transform);
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var removed = ol.proj.removeTransform(foo, bar);
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expect(removed).to.be(transform);
|
|
expect(ol.proj.transforms_.foo).to.be(undefined);
|
|
});
|
|
|
|
});
|
|
|
|
describe('ol.proj.transform()', function() {
|
|
|
|
it('transforms a 2d coordinate', function() {
|
|
var got = ol.proj.transform([-10, -20], 'EPSG:4326', 'EPSG:3857');
|
|
expect(got).to.have.length(2);
|
|
expect(got[0]).to.roughlyEqual(-1113194.9079327357, 1e-3);
|
|
expect(got[1]).to.roughlyEqual(-2273030.92698769, 1e-3);
|
|
});
|
|
|
|
it('transforms a 3d coordinate', function() {
|
|
var got = ol.proj.transform([-10, -20, 3], 'EPSG:4326', 'EPSG:3857');
|
|
expect(got).to.have.length(3);
|
|
expect(got[0]).to.roughlyEqual(-1113194.9079327357, 1e-3);
|
|
expect(got[1]).to.roughlyEqual(-2273030.92698769, 1e-3);
|
|
expect(got[2]).to.be(3);
|
|
});
|
|
|
|
it('transforms a 4d coordinate', function() {
|
|
var got = ol.proj.transform([-10, -20, 3, 4], 'EPSG:4326', 'EPSG:3857');
|
|
expect(got).to.have.length(4);
|
|
expect(got[0]).to.roughlyEqual(-1113194.9079327357, 1e-3);
|
|
expect(got[1]).to.roughlyEqual(-2273030.92698769, 1e-3);
|
|
expect(got[2]).to.be(3);
|
|
expect(got[3]).to.be(4);
|
|
});
|
|
|
|
it('works with 3d points and proj4 defs', function() {
|
|
proj4.defs('custom',
|
|
'+proj=somerc +lat_0=46.95240555555556 +lon_0=7.439583333333333 ' +
|
|
'+k_0=1 +x_0=600000 +y_0=200000 +ellps=bessel ' +
|
|
'+towgs84=674.374,15.056,405.346,0,0,0,0 +units=m +no_defs');
|
|
|
|
var got = ol.proj.transform([-111, 45.5, 123], 'EPSG:4326', 'custom');
|
|
expect(got).to.have.length(3);
|
|
expect(got[0]).to.roughlyEqual(-6601512.194209638, 1);
|
|
expect(got[1]).to.roughlyEqual(6145843.802742112, 1);
|
|
expect(got[2]).to.be(123);
|
|
|
|
delete proj4.defs.custom;
|
|
});
|
|
|
|
});
|
|
|
|
describe('ol.proj.Projection.prototype.getMetersPerUnit()', function() {
|
|
|
|
beforeEach(function() {
|
|
proj4.defs('EPSG:26782',
|
|
'+proj=lcc +lat_1=29.3 +lat_2=30.7 +lat_0=28.66666666666667 ' +
|
|
'+lon_0=-91.33333333333333 +x_0=609601.2192024384 +y_0=0 ' +
|
|
'+ellps=clrk66 +datum=NAD27 +to_meter=0.3048006096012192 +no_defs');
|
|
proj4.defs('EPSG:3739', '+proj=tmerc +lat_0=40.5 ' +
|
|
'+lon_0=-110.0833333333333 +k=0.9999375 +x_0=800000.0000101599 ' +
|
|
'+y_0=99999.99998983997 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 ' +
|
|
'+units=us-ft +no_defs');
|
|
});
|
|
|
|
afterEach(function() {
|
|
delete proj4.defs['EPSG:26782'];
|
|
delete proj4.defs['EPSG:3739'];
|
|
});
|
|
|
|
it('returns value in meters', function() {
|
|
var epsg4326 = ol.proj.get('EPSG:4326');
|
|
expect(epsg4326.getMetersPerUnit()).to.eql(111194.87428468118);
|
|
});
|
|
|
|
it('works for proj4js projections without units', function() {
|
|
var epsg26782 = ol.proj.get('EPSG:26782');
|
|
expect(epsg26782.getMetersPerUnit()).to.eql(0.3048006096012192);
|
|
});
|
|
|
|
it('works for proj4js projections with units other than m', function() {
|
|
var epsg3739 = ol.proj.get('EPSG:3739');
|
|
expect(epsg3739.getMetersPerUnit()).to.eql(1200 / 3937);
|
|
});
|
|
|
|
});
|
|
|
|
});
|
|
|
|
|
|
goog.require('goog.array');
|
|
goog.require('ol.proj');
|
|
goog.require('ol.proj.Projection');
|
|
goog.require('ol.proj.Units');
|
|
goog.require('ol.proj.common');
|