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C# SpatialContext.GetUnits方法代码示例

本文整理汇总了C#中Spatial4n.Core.Context.SpatialContext.GetUnits方法的典型用法代码示例。如果您正苦于以下问题:C# SpatialContext.GetUnits方法的具体用法?C# SpatialContext.GetUnits怎么用?C# SpatialContext.GetUnits使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在Spatial4n.Core.Context.SpatialContext的用法示例。


在下文中一共展示了SpatialContext.GetUnits方法的4个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。

示例1: CalcBoxByDistFromPt

 public override Rectangle CalcBoxByDistFromPt(Point @from, double distance, SpatialContext ctx)
 {
     Debug.Assert(radius == ctx.GetUnits().EarthRadius());
     if (distance == 0)
         return from.GetBoundingBox();
     return DistanceUtils.CalcBoxByDistFromPtDEG(from.GetY(), from.GetX(), distance, ctx);
 }
开发者ID:ccurrens,项目名称:Spatial4n,代码行数:7,代码来源:GeodesicSphereDistCalc.cs

示例2: CalcBoxByDistFromPtDEG

        public static Rectangle CalcBoxByDistFromPtDEG(double lat, double lon, double distance, SpatialContext ctx)
        {
            //See http://janmatuschek.de/LatitudeLongitudeBoundingCoordinates Section 3.1, 3.2 and 3.3

            double radius = ctx.GetUnits().EarthRadius();
            double dist_deg = Dist2Degrees(distance, radius);

            if (dist_deg == 0)
                return ctx.MakeRect(lon, lon, lat, lat);//essentially a point

            if (dist_deg >= 180)//distance is >= opposite side of the globe
                return ctx.GetWorldBounds();

            //--calc latitude bounds
            double latN_deg = lat + dist_deg;
            double latS_deg = lat - dist_deg;

            if (latN_deg >= 90 || latS_deg <= -90)
            {//touches either pole
                //we have special logic for longitude
                double lonW_deg = -180, lonE_deg = 180;//world wrap: 360 deg
                if (latN_deg <= 90 && latS_deg >= -90)
                {//doesn't pass either pole: 180 deg
                    lonW_deg = lon - 90;
                    lonE_deg = lon + 90;
                }
                if (latN_deg > 90)
                    latN_deg = 90;
                if (latS_deg < -90)
                    latS_deg = -90;

                return ctx.MakeRect(lonW_deg, lonE_deg, latS_deg, latN_deg);
            }
            else
            {
                //--calc longitude bounds
                double lon_delta_deg = CalcBoxByDistFromPt_deltaLonDEG(lat, lon, distance, radius);

                double lonW_deg = lon - lon_delta_deg;
                double lonE_deg = lon + lon_delta_deg;

                return ctx.MakeRect(lonW_deg, lonE_deg, latS_deg, latN_deg);//ctx will normalize longitude
            }
        }
开发者ID:ccurrens,项目名称:Spatial4n,代码行数:44,代码来源:DistanceUtils.cs

示例3: PointOnBearing

 public override Point PointOnBearing(Point @from, double dist, double bearingDEG, SpatialContext ctx)
 {
     //TODO avoid unnecessary double[] intermediate object
     if (dist == 0)
         return from;
     double[] latLon = DistanceUtils.PointOnBearingRAD(
         DistanceUtils.ToRadians(from.GetY()), DistanceUtils.ToRadians(from.GetX()),
         DistanceUtils.Dist2Radians(dist, ctx.GetUnits().EarthRadius()),
         DistanceUtils.ToRadians(bearingDEG), null);
     return ctx.MakePoint(DistanceUtils.ToDegrees(latLon[1]), DistanceUtils.ToDegrees(latLon[0]));
 }
开发者ID:ccurrens,项目名称:Spatial4n,代码行数:11,代码来源:GeodesicSphereDistCalc.cs

示例4: TestGeoCircle

        public void TestGeoCircle(SpatialContext ctx)
        {
            base.ctx = ctx;

            //--Start with some static tests that once failed:

            //Bug: numeric edge at pole, fails to init
            ctx.MakeCircle(110, -12, ctx.GetDistCalc().DegreesToDistance(90 + 12));

            //Bug: horizXAxis not in enclosing rectangle, assertion
            ctx.MakeCircle(-44, 16, DegToDist(106));
            ctx.MakeCircle(-36, -76, DegToDist(14));
            ctx.MakeCircle(107, 82, DegToDist(172));

            // TODO need to update this test to be valid
            //{
            //    //Bug in which distance was being confused as being in the same coordinate system as x,y.
            //    double distDeltaToPole = 0.001;//1m
            //    double distDeltaToPoleDEG = ctx.getDistCalc().distanceToDegrees(distDeltaToPole);
            //    double dist = 1;//1km
            //    double distDEG = ctx.getDistCalc().distanceToDegrees(dist);
            //    Circle c = ctx.makeCircle(0, 90 - distDeltaToPoleDEG - distDEG, dist);
            //    Rectangle cBBox = c.getBoundingBox();
            //    Rectangle r = ctx.makeRect(cBBox.getMaxX() * 0.99, cBBox.getMaxX() + 1, c.getCenter().getY(), c.getCenter().getY());
            //    assertEquals(INTERSECTS, c.getBoundingBox().relate(r, ctx));
            //    assertEquals("dist != xy space", INTERSECTS, c.relate(r, ctx));//once failed here
            //}

            Assert.Equal(/*"nudge back circle", */ SpatialRelation.CONTAINS, ctx.MakeCircle(-150, -90, DegToDist(122)).Relate(ctx.MakeRect(0, -132, 32, 32), ctx));

            Assert.Equal(/* "wrong estimate", */ SpatialRelation.DISJOINT, ctx.MakeCircle(-166, 59, 5226.2).Relate(ctx.MakeRect(36, 66, 23, 23), ctx));

            Assert.Equal(/*"bad CONTAINS (dateline)",*/ SpatialRelation.INTERSECTS,
                ctx.MakeCircle(56, -50, 12231.5).Relate(ctx.MakeRect(108, 26, 39, 48), ctx));

            Assert.Equal(/*"bad CONTAINS (backwrap2)",*/ SpatialRelation.INTERSECTS,
                ctx.MakeCircle(112, -3, DegToDist(91)).Relate(ctx.MakeRect(-163, 29, -38, 10), ctx));

            Assert.Equal(/*"bad CONTAINS (r x-wrap)",*/ SpatialRelation.INTERSECTS,
                ctx.MakeCircle(-139, 47, DegToDist(80)).Relate(ctx.MakeRect(-180, 180, -3, 12), ctx));

            Assert.Equal(/*"bad CONTAINS (pwrap)",*/ SpatialRelation.INTERSECTS,
                ctx.MakeCircle(-139, 47, DegToDist(80)).Relate(ctx.MakeRect(-180, 179, -3, 12), ctx));

            Assert.Equal(/*"no-dist 1",*/ SpatialRelation.WITHIN,
                ctx.MakeCircle(135, 21, 0).Relate(ctx.MakeRect(-103, -154, -47, 52), ctx));

            Assert.Equal(/*"bbox <= >= -90 bug",*/ SpatialRelation.CONTAINS,
                ctx.MakeCircle(-64, -84, DegToDist(124)).Relate(ctx.MakeRect(-96, 96, -10, -10), ctx));

            //The horizontal axis line of a geo circle doesn't necessarily pass through c's ctr.
            Assert.Equal(/*"c's horiz axis doesn't pass through ctr",*/ SpatialRelation.INTERSECTS,
                ctx.MakeCircle(71, -44, DegToDist(40)).Relate(ctx.MakeRect(15, 27, -62, -34), ctx));

            Assert.Equal(/*"pole boundary",*/ SpatialRelation.INTERSECTS,
                ctx.MakeCircle(-100, -12, DegToDist(102)).Relate(ctx.MakeRect(143, 175, 4, 32), ctx));

            Assert.Equal(/*"full circle assert",*/ SpatialRelation.CONTAINS,
                ctx.MakeCircle(-64, 32, DegToDist(180)).Relate(ctx.MakeRect(47, 47, -14, 90), ctx));

            //--Now proceed with systematic testing:

            double distToOpposeSide = ctx.GetUnits().EarthRadius() * Math.PI;
            Assert.Equal(ctx.GetWorldBounds(), ctx.MakeCircle(0, 0, distToOpposeSide).GetBoundingBox());
            //assertEquals(ctx.makeCircle(0,0,distToOpposeSide/2 - 500).getBoundingBox());

            double[] theXs = new double[] { -180, -45, 90 };
            foreach (double x in theXs)
            {
                double[] theYs = new double[] { -90, -45, 0, 45, 90 };
                foreach (double y in theYs)
                {
                    TestCircle(x, y, 0);
                    TestCircle(x, y, 500);
                    TestCircle(x, y, DegToDist(90));
                    TestCircle(x, y, ctx.GetUnits().EarthRadius() * 6);
                }
            }

            TestCircleIntersect();
        }
开发者ID:ccurrens,项目名称:Spatial4n,代码行数:81,代码来源:TestShapesGeo.cs


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