public virtual void TestLineStringDateline()
{
//works because we use NTS (NtsGeometry); BufferedLineString doesn't yet do DL wrap.
IShape s = ctx.ReadShapeFromWkt("LINESTRING(160 10, -170 15)");
CustomAssert.EqualWithDelta(30, s.BoundingBox.Width, 0.0);
}
public void TestNtsContextFactory()
{
NtsSpatialContext ctx = (NtsSpatialContext)Call(
"spatialContextFactory", typeof(NtsSpatialContextFactory).AssemblyQualifiedName,
"geo", "true",
"normWrapLongitude", "true",
"precisionScale", "2.0",
"wktShapeParserClass", typeof(CustomWktShapeParser).AssemblyQualifiedName,
"datelineRule", "ccwRect",
"validationRule", "repairConvexHull",
"autoIndex", "true");
Assert.True(ctx.IsNormWrapLongitude);
CustomAssert.EqualWithDelta(2.0, ctx.GeometryFactory.PrecisionModel.Scale, 0.0);
Assert.True(CustomWktShapeParser.once);//cheap way to test it was created
Assert.Equal(DatelineRule.CcwRect,
((NtsWktShapeParser)ctx.WktShapeParser).DatelineRule);
Assert.Equal(ValidationRule.RepairConvexHull,
((NtsWktShapeParser)ctx.WktShapeParser).ValidationRule);
//ensure geo=false with worldbounds works -- fixes #72
ctx = (NtsSpatialContext)Call(
"spatialContextFactory", typeof(NtsSpatialContextFactory).AssemblyQualifiedName,
"geo", "false",//set to false
"worldBounds", "ENVELOPE(-500,500,300,-300)",
"normWrapLongitude", "true",
"precisionScale", "2.0",
"wktShapeParserClass", typeof(CustomWktShapeParser).AssemblyQualifiedName,
"datelineRule", "ccwRect",
"validationRule", "repairConvexHull",
"autoIndex", "true");
CustomAssert.EqualWithDelta(300, ctx.WorldBounds.MaxY, 0.0);
}
public void TestNormLon()
{
var lons = new double[][]
{
new double[] { 1.23, 1.23 },
//1.23 might become 1.2299999 after some math and we want to ensure that doesn't happen
new double[] { -180, -180 },
new double[] { 180, +180 },
new double[] { 0, 0 },
new double[] { -190, 170 },
new double[] { 181, -179 },
new double[] { -180 - 360, -180 },
new double[] { -180 - 720, -180 },
new double[] { 180 + 360, +180 },
new double[] { 180 + 720, +180 }
};
foreach (var pair in lons)
{
CustomAssert.EqualWithDelta( /*"input "+pair[0],*/
pair[1], DistanceUtils.NormLonDEG(pair[0]), Double.Epsilon);
}
var random = new Random(RandomSeed.Seed());
for (int i = -1000; i < 1000; i += random.Next(9) * 10)
{
double d = DistanceUtils.NormLonDEG(i);
Assert.True(d >= -180 && d <= 180, i + " " + d);
}
}
public void TestNormLat()
{
var lats = new double[][]
{
new double[] { 1.23, 1.23 },
//1.23 might become 1.2299999 after some math and we want to ensure that doesn't happen
new double[] { -90, -90 },
new double[] { 90, 90 },
new double[] { 0, 0 },
new double[] { -100, -80 },
new double[] { -90 - 180, 90 },
new double[] { -90 - 360, -90 },
new double[] { 90 + 180, -90 },
new double[] { 90 + 360, 90 },
new double[] { -12 + 180, 12 }
};
foreach (var pair in lats)
{
CustomAssert.EqualWithDelta( /* "input "+pair[0],*/
pair[1], DistanceUtils.NormLatDEG(pair[0]), Double.Epsilon);
}
var random = new Random(RandomSeed.Seed());
for (int i = -1000; i < 1000; i += random.Next(9) * 10)
{
double d = DistanceUtils.NormLatDEG(i);
Assert.True(/*i + " " + d,*/ d >= -90 && d <= 90);
}
}
protected virtual void AssertEqualsRatio(string msg, double expected, double actual)
{
double delta = Math.Abs(actual - expected);
double @base = Math.Min(actual, expected);
double deltaRatio = @base == 0 ? delta : Math.Min(delta, delta / @base);
CustomAssert.EqualWithDelta(/*msg,*/ 0, deltaRatio, EPS);
}
private static void AssertEqualsRatio(double expected, double actual, double EPS)
{
double delta = Math.Abs(actual - expected);
double baseValue = Math.Min(actual, expected);
double deltaRatio = baseValue == 0 ? delta : Math.Min(delta, delta / baseValue);
CustomAssert.EqualWithDelta(0, deltaRatio, EPS);
}
private void AssertEqualsRatio(String msg, double expected, double actual)
{
double delta = Math.Abs(actual - expected);
double baseValue = Math.Min(actual, expected);
double deltaRatio = (baseValue == 0) ? delta : Math.Min(delta, delta / baseValue);
CustomAssert.EqualWithDelta(/*msg,*/ 0, deltaRatio, EPS);
}
public virtual void TestDecodePreciseLongitudeLatitude()
{
string hash = GeohashUtils.EncodeLatLon(52.3738007, 4.8909347);
IPoint point = GeohashUtils.Decode(hash, ctx);
CustomAssert.EqualWithDelta(52.3738007, point.Y, 0.00001D);
CustomAssert.EqualWithDelta(4.8909347, point.X, 0.00001D);
}
public void TestDecodeImpreciseLongitudeLatitude()
{
String hash = GeohashUtils.EncodeLatLon(84.6, 10.5);
Point point = GeohashUtils.Decode(hash, ctx);
CustomAssert.EqualWithDelta(84.6, point.GetY(), 0.00001D);
CustomAssert.EqualWithDelta(10.5, point.GetX(), 0.00001D);
}
public virtual void TestDecodeImpreciseLongitudeLatitude()
{
string hash = GeohashUtils.EncodeLatLon(84.6, 10.5);
IPoint point = GeohashUtils.Decode(hash, ctx);
CustomAssert.EqualWithDelta(84.6, point.Y, 0.00001D);
CustomAssert.EqualWithDelta(10.5, point.X, 0.00001D);
}
public virtual void TestHashLenToWidth()
{
//test odd & even len
double[] boxOdd = GeohashUtils.LookupDegreesSizeForHashLen(3);
CustomAssert.EqualWithDelta(1.40625, boxOdd[0], 0.0001);
CustomAssert.EqualWithDelta(1.40625, boxOdd[1], 0.0001);
double[] boxEven = GeohashUtils.LookupDegreesSizeForHashLen(4);
CustomAssert.EqualWithDelta(0.1757, boxEven[0], 0.0001);
CustomAssert.EqualWithDelta(0.3515, boxEven[1], 0.0001);
}
public virtual void TestWidthGreaterThan180()
{
//does NOT cross the dateline but is a wide shape >180
NtsGeometry ntsGeo = (NtsGeometry)ctx.ReadShapeFromWkt("POLYGON((-161 49, 0 49, 20 49, 20 89.1, 0 89.1, -161 89.2, -161 49))");
CustomAssert.EqualWithDelta(161 + 20, ntsGeo.BoundingBox.Width, 0.001);
//shift it to cross the dateline and check that it's still good
ntsGeo = ShiftPoly(ntsGeo, 180);
CustomAssert.EqualWithDelta(161 + 20, ntsGeo.BoundingBox.Width, 0.001);
}
public void testSomeDistances()
{
//See to verify: from http://www.movable-type.co.uk/scripts/latlong.html
Point ctr = pLL(0, 100);
CustomAssert.EqualWithDelta(11100, dc().Distance(ctr, pLL(10, 0)) * DistanceUtils.DEG_TO_KM, 3);
double deg = dc().Distance(ctr, pLL(10, -160));
CustomAssert.EqualWithDelta(11100, deg * DistanceUtils.DEG_TO_KM, 3);
CustomAssert.EqualWithDelta(314.40338, dc().Distance(pLL(1, 2), pLL(3, 4)) * DistanceUtils.DEG_TO_KM, EPS);
}
protected virtual void TestRectangle(double minX, double width, double minY, double height)
{
double maxX = minX + width;
double maxY = minY + height;
minX = NormX(minX);
maxX = NormX(maxX);
IRectangle r = ctx.MakeRectangle(minX, maxX, minY, maxY);
//test equals & hashcode of duplicate
IRectangle r2 = ctx.MakeRectangle(minX, maxX, minY, maxY);
Assert.Equal(r, r2);
Assert.Equal(r.GetHashCode(), r2.GetHashCode());
string msg = r.ToString();
Assert.Equal(/*msg,*/ width != 0 && height != 0, r.HasArea);
Assert.Equal(/*msg,*/ width != 0 && height != 0, r.GetArea(ctx) > 0);
if (ctx.IsGeo && r.Width == 360 && r.Height == 180)
{
//whole globe
double earthRadius = DistanceUtils.ToDegrees(1);
CustomAssert.EqualWithDelta(4 * Math.PI * earthRadius * earthRadius, r.GetArea(ctx), 1.0);//1km err
}
AssertEqualsRatio(msg, height, r.Height);
AssertEqualsRatio(msg, width, r.Width);
IPoint center = r.Center;
msg += " ctr:" + center;
//System.out.println(msg);
AssertRelation(msg, SpatialRelation.CONTAINS, r, center);
IDistanceCalculator dc = ctx.DistCalc;
double dUR = dc.Distance(center, r.MaxX, r.MaxY);
double dLR = dc.Distance(center, r.MaxX, r.MinY);
double dUL = dc.Distance(center, r.MinX, r.MaxY);
double dLL = dc.Distance(center, r.MinX, r.MinY);
Assert.Equal(/*msg,*/ width != 0 || height != 0, dUR != 0);
if (dUR != 0)
{
Assert.True(dUR > 0 && dLL > 0);
}
AssertEqualsRatio(msg, dUR, dUL);
AssertEqualsRatio(msg, dLR, dLL);
if (!ctx.IsGeo || center.Y == 0)
{
AssertEqualsRatio(msg, dUR, dLL);
}
}
private void checkBBox(Point ctr, double distKm)
{
String msg = "ctr: " + ctr + " distKm: " + distKm;
double dist = distKm * DistanceUtils.KM_TO_DEG;
Rectangle r = dc().CalcBoxByDistFromPt(ctr, dist, ctx, null);
double horizAxisLat = dc().CalcBoxByDistFromPt_yHorizAxisDEG(ctr, dist, ctx);
if (!Double.IsNaN(horizAxisLat))
{
Assert.True(r.RelateYRange(horizAxisLat, horizAxisLat).Intersects());
}
//horizontal
if (r.GetWidth() >= 180)
{
double deg = dc().Distance(ctr, r.GetMinX(), r.GetMaxY() == 90 ? 90 : -90);
double calcDistKm = deg * DistanceUtils.DEG_TO_KM;
Assert.True(/*msg,*/ calcDistKm <= distKm + EPS);
//horizAxisLat is meaningless in this context
}
else
{
Point tPt = FindClosestPointOnVertToPoint(r.GetMinX(), r.GetMinY(), r.GetMaxY(), ctr);
double calcDistKm = dc().Distance(ctr, tPt) * DistanceUtils.DEG_TO_KM;
CustomAssert.EqualWithDelta(/*msg,*/ distKm, calcDistKm, EPS);
CustomAssert.EqualWithDelta(/*msg,*/ tPt.GetY(), horizAxisLat, EPS);
}
//vertical
double topDistKm = dc().Distance(ctr, ctr.GetX(), r.GetMaxY()) * DistanceUtils.DEG_TO_KM;
if (r.GetMaxY() == 90)
{
Assert.True(/*msg,*/ topDistKm <= distKm + EPS);
}
else
{
CustomAssert.EqualWithDelta(msg, distKm, topDistKm, EPS);
}
double botDistKm = dc().Distance(ctr, ctr.GetX(), r.GetMinY()) * DistanceUtils.DEG_TO_KM;
if (r.GetMinY() == -90)
{
Assert.True(/*msg,*/ botDistKm <= distKm + EPS);
}
else
{
CustomAssert.EqualWithDelta(/*msg,*/ distKm, botDistKm, EPS);
}
}
public void testArea()
{
//simple bbox
Rectangle r = RandomRectangle(20);
var ctxJts = (NtsSpatialContext)ctx;
var rPoly = new NtsGeometry(ctxJts.GetGeometryFrom(r), ctxJts, false);
CustomAssert.EqualWithDelta(r.GetArea(null), rPoly.GetArea(null), 0.0);
CustomAssert.EqualWithDelta(r.GetArea(ctx), rPoly.GetArea(ctx), 0.000001); //same since fills 100%
CustomAssert.EqualWithDelta(1300, POLY_SHAPE.GetArea(null), 0.0);
//fills 27%
CustomAssert.EqualWithDelta(0.27, POLY_SHAPE.GetArea(ctx) / POLY_SHAPE.GetBoundingBox().GetArea(ctx), 0.009);
Assert.True(POLY_SHAPE.GetBoundingBox().GetArea(ctx) > POLY_SHAPE.GetArea(ctx));
}
public virtual void TestArea()
{
//simple bbox
IRectangle r = RandomRectangle(20);
NtsSpatialContext ctxNts = (NtsSpatialContext)ctx;
NtsGeometry rPoly = ctxNts.MakeShape(ctxNts.GetGeometryFrom(r), false, false);
CustomAssert.EqualWithDelta(r.GetArea(null), rPoly.GetArea(null), 0.0);
CustomAssert.EqualWithDelta(r.GetArea(ctx), rPoly.GetArea(ctx), 0.000001);//same since fills 100%
CustomAssert.EqualWithDelta(1300, POLY_SHAPE.GetArea(null), 0.0);
//fills 27%
CustomAssert.EqualWithDelta(0.27, POLY_SHAPE.GetArea(ctx) / POLY_SHAPE.BoundingBox.GetArea(ctx), 0.009);
Assert.True(POLY_SHAPE.BoundingBox.GetArea(ctx) > POLY_SHAPE.GetArea(ctx));
}
public void testArea()
{
double radius = DistanceUtils.EARTH_MEAN_RADIUS_KM * DistanceUtils.KM_TO_DEG;
//surface of a sphere is 4 * pi * r^2
double earthArea = 4 * Math.PI * radius * radius;
Circle c = ctx.MakeCircle(random.Next(-180, 180), random.Next(-90, 90),
180); //180 means whole earth
CustomAssert.EqualWithDelta(earthArea, c.GetArea(ctx), 1.0);
CustomAssert.EqualWithDelta(earthArea, ctx.GetWorldBounds().GetArea(ctx), 1.0);
//now check half earth
Circle cHalf = ctx.MakeCircle(c.GetCenter(), 90);
CustomAssert.EqualWithDelta(earthArea / 2, cHalf.GetArea(ctx), 1.0);
//circle with same radius at +20 lat with one at -20 lat should have same area as well as bbox with same area
Circle c2 = ctx.MakeCircle(c.GetCenter(), 30);
Circle c3 = ctx.MakeCircle(c.GetCenter().GetX(), 20, 30);
CustomAssert.EqualWithDelta(c2.GetArea(ctx), c3.GetArea(ctx), 0.01);
Circle c3Opposite = ctx.MakeCircle(c.GetCenter().GetX(), -20, 30);
CustomAssert.EqualWithDelta(c3.GetArea(ctx), c3Opposite.GetArea(ctx), 0.01);
CustomAssert.EqualWithDelta(c3.GetBoundingBox().GetArea(ctx), c3Opposite.GetBoundingBox().GetArea(ctx), 0.01);
//small shapes near the equator should have similar areas to euclidean rectangle
Rectangle smallRect = ctx.MakeRectangle(0, 1, 0, 1);
CustomAssert.EqualWithDelta(1.0, smallRect.GetArea(null), 0.0);
double smallDelta = smallRect.GetArea(null) - smallRect.GetArea(ctx);
Assert.True(smallDelta > 0 && smallDelta < 0.0001);
Circle smallCircle = ctx.MakeCircle(0, 0, 1);
smallDelta = smallCircle.GetArea(null) - smallCircle.GetArea(ctx);
Assert.True(smallDelta > 0 && smallDelta < 0.0001);
//bigger, but still fairly similar
//c2 = ctx.makeCircle(c.getCenter(), 30);
double areaRatio = c2.GetArea(null) / c2.GetArea(ctx);
Assert.True(areaRatio > 1 && areaRatio < 1.1);
}
private void assertDistanceConversion(double dist)
{
double radius = DistanceUtils.EARTH_MEAN_RADIUS_KM;
//test back & forth conversion for both
double distRAD = DistanceUtils.Dist2Radians(dist, radius);
CustomAssert.EqualWithDelta(dist, DistanceUtils.Radians2Dist(distRAD, radius), EPS);
double distDEG = DistanceUtils.Dist2Degrees(dist, radius);
CustomAssert.EqualWithDelta(dist, DistanceUtils.Degrees2Dist(distDEG, radius), EPS);
//test across rad & deg
CustomAssert.EqualWithDelta(distDEG, DistanceUtils.ToDegrees(distRAD), EPS);
//test point on bearing
CustomAssert.EqualWithDelta(
DistanceUtils.PointOnBearingRAD(0, 0, DistanceUtils.Dist2Radians(dist, radius),
DistanceUtils.DEG_90_AS_RADS, ctx, new PointImpl(0, 0, ctx)).GetX(),
distRAD, 10e-5);
}
public void TestDecodeEncode()
{
String geoHash = "u173zq37x014";
Assert.Equal(geoHash, GeohashUtils.EncodeLatLon(52.3738007, 4.8909347));
Point point = GeohashUtils.Decode(geoHash, ctx);
CustomAssert.EqualWithDelta(52.37380061d, point.GetY(), 0.000001d);
CustomAssert.EqualWithDelta(4.8909343d, point.GetX(), 0.000001d);
Assert.Equal(geoHash, GeohashUtils.EncodeLatLon(point.GetY(), point.GetX()));
geoHash = "u173";
point = GeohashUtils.Decode("u173", ctx);
geoHash = GeohashUtils.EncodeLatLon(point.GetY(), point.GetX());
Point point2 = GeohashUtils.Decode(geoHash, ctx);
CustomAssert.EqualWithDelta(point.GetY(), point2.GetY(), 0.000001d);
CustomAssert.EqualWithDelta(point.GetX(), point2.GetX(), 0.000001d);
}
public virtual void TestDecodeEncode()
{
string geoHash = "u173zq37x014";
Assert.Equal(geoHash, GeohashUtils.EncodeLatLon(52.3738007, 4.8909347));
IPoint point = GeohashUtils.Decode(geoHash, ctx);
CustomAssert.EqualWithDelta(52.37380061d, point.Y, 0.000001d);
CustomAssert.EqualWithDelta(4.8909343d, point.X, 0.000001d);
Assert.Equal(geoHash, GeohashUtils.EncodeLatLon(point.Y, point.X));
geoHash = "u173";
point = GeohashUtils.Decode("u173", ctx);
geoHash = GeohashUtils.EncodeLatLon(point.Y, point.X);
IPoint point2 = GeohashUtils.Decode(geoHash, ctx);
CustomAssert.EqualWithDelta(point.Y, point2.Y, 0.000001d);
CustomAssert.EqualWithDelta(point.X, point2.X, 0.000001d);
}
public virtual void TestCalcBoxByDistFromPt()
{
//first test regression
{
double d = 6894.1 * DistanceUtils.KM_TO_DEG;
IPoint pCtr = PLL(-20, 84);
IPoint pTgt = PLL(-42, 15);
Assert.True(Dc().Distance(pCtr, pTgt) < d);
//since the pairwise distance is less than d, a bounding box from ctr with d should contain pTgt.
IRectangle r = Dc().CalcBoxByDistFromPt(pCtr, d, ctx, null);
Assert.Equal(SpatialRelation.CONTAINS, r.Relate(pTgt));
CheckBBox(pCtr, d);
}
CustomAssert.EqualWithDelta(/*"0 dist, horiz line",*/
-45, Dc().CalcBoxByDistFromPt_yHorizAxisDEG(ctx.MakePoint(-180, -45), 0, ctx), 0);
double MAXDIST = (double)180 * DistanceUtils.DEG_TO_KM;
CheckBBox(ctx.MakePoint(0, 0), MAXDIST);
CheckBBox(ctx.MakePoint(0, 0), MAXDIST * 0.999999);
CheckBBox(ctx.MakePoint(0, 0), 0);
CheckBBox(ctx.MakePoint(0, 0), 0.000001);
CheckBBox(ctx.MakePoint(0, 90), 0.000001);
CheckBBox(ctx.MakePoint(-32.7, -5.42), 9829);
CheckBBox(ctx.MakePoint(0, 90 - 20), (double)20 * DistanceUtils.DEG_TO_KM);
{
double d = 0.010;//10m
CheckBBox(ctx.MakePoint(0, 90 - (d + 0.001) * DistanceUtils.KM_TO_DEG), d);
}
for (int T = 0; T < 100; T++)
{
double lat = -90 + random.NextDouble() * 180;
double lon = -180 + random.NextDouble() * 360;
IPoint ctr = ctx.MakePoint(lon, lat);
double dist = MAXDIST * random.NextDouble();
CheckBBox(ctr, dist);
}
}
public virtual void TestGeoRectangle(SpatialContext ctx)
{
base.ctx = ctx;
double v = 200 * (random.NextDouble() > 0.5 ? -1 : 1);
Assert.Throws <InvalidShapeException>(() => ctx.MakeRectangle(v, 0, 0, 0));
Assert.Throws <InvalidShapeException>(() => ctx.MakeRectangle(0, v, 0, 0));
Assert.Throws <InvalidShapeException>(() => ctx.MakeRectangle(0, 0, v, 0));
Assert.Throws <InvalidShapeException>(() => ctx.MakeRectangle(0, 0, 0, v));
Assert.Throws <InvalidShapeException>(() => ctx.MakeRectangle(0, 0, 10, -10));
//test some relateXRange
// opposite +/- 180
Assert.Equal(SpatialRelation.INTERSECTS, ctx.MakeRectangle(170, 180, 0, 0).RelateXRange(-180, -170));
Assert.Equal(SpatialRelation.INTERSECTS, ctx.MakeRectangle(-90, -45, 0, 0).RelateXRange(-45, -135));
Assert.Equal(SpatialRelation.CONTAINS, ctx.WorldBounds.RelateXRange(-90, -135));
//point on edge at dateline using opposite +/- 180
Assert.Equal(SpatialRelation.CONTAINS, ctx.MakeRectangle(170, 180, 0, 0).Relate(ctx.MakePoint(-180, 0)));
//test 180 becomes -180 for non-zero width rectangle
Assert.Equal(ctx.MakeRectangle(-180, -170, 0, 0), ctx.MakeRectangle(180, -170, 0, 0));
Assert.Equal(ctx.MakeRectangle(170, 180, 0, 0), ctx.MakeRectangle(170, -180, 0, 0));
double[] lons = new double[] { 0, 45, 160, 180, -45, -175, -180 }; //minX
foreach (double lon in lons)
{
double[] lonWs = new double[] { 0, 20, 180, 200, 355, 360 }; //width
foreach (double lonW in lonWs)
{
if (lonW == 360 && lon != -180)
{
continue;
}
TestRectangle(lon, lonW, 0, 0);
TestRectangle(lon, lonW, -10, 10);
TestRectangle(lon, lonW, 80, 10); //polar cap
TestRectangle(lon, lonW, -90, 180); //full lat range
}
}
TestShapes2D.TestCircleReset(ctx);
//Test geo rectangle intersections
TestRectIntersect();
//Test buffer
AssertEquals(ctx.MakeRectangle(-10, 10, -10, 10), ctx.MakeRectangle(0, 0, 0, 0).GetBuffered(10, ctx));
for (int i = 0; i < AtLeast(100); i++)
{
IRectangle r = RandomRectangle(1);
int buf = random.Next(0, 90 + 1);
IRectangle br = (IRectangle)r.GetBuffered(buf, ctx);
AssertRelation(null, SpatialRelation.CONTAINS, br, r);
if (r.Width + 2 * buf >= 360)
{
CustomAssert.EqualWithDelta(360, br.Width, 0.0);
}
else
{
Assert.True(br.Width - r.Width >= 2 * buf);
}
//TODO test more thoroughly; we don't check that we over-buf
}
Assert.True(ctx.MakeRectangle(0, 10, 0, 89).GetBuffered(0.5, ctx).BoundingBox.Width
> 11);
}
