几何构造函数

点几何

创建点

使用 API 创建地理空间点非常简单方便，如下面的代码示例所示。

// For complete examples and data files, please go to https://github.com/aspose-gis/Aspose.GIS-for-.NET
Point point = new Point(40.7128, -74.006);

创建多点

Aspose.GIS for .NET 提供了将多个点表示为单个 MultiPoint 类的方法。它可以包含由每个点的经纬度信息定义的一个或多个点。

// For complete examples and data files, please go to https://github.com/aspose-gis/Aspose.GIS-for-.NET
MultiPoint multipoint = new MultiPoint();
multipoint.Add(new Point(1, 2));
multipoint.Add(new Point(3, 4));

线字符串几何

您可以指定 Point Geometry 创建 Line String。

创建线字符串

// For complete examples and data files, please go to https://github.com/aspose-gis/Aspose.GIS-for-.NET
LineString line = new LineString();

line.AddPoint(78.65, -32.65);

line.AddPoint(-98.65, 12.65);

创建多线字符串

MultiLine 字符串是由 Point geometries 构建的 Line Strings 的集合。

// For complete examples and data files, please go to https://github.com/aspose-gis/Aspose.GIS-for-.NET
LineString firstLine = new LineString();
firstLine.AddPoint(7.5, -3.5);
firstLine.AddPoint(-9.6, 12.6);

LineString secondLine = new LineString();
secondLine.AddPoint(8.5, -2.6);
secondLine.AddPoint(-8.6, 1.5);

MultiLineString multiLineString = new MultiLineString();
multiLineString.Add(firstLine);
multiLineString.Add(secondLine);

多边形几何

多边形是由 Point geometries 的集合，以 LinearRing 形式定义 Points。

创建多边形

// For complete examples and data files, please go to https://github.com/aspose-gis/Aspose.GIS-for-.NET
Polygon polygon = new Polygon();

LinearRing ring = new LinearRing();
ring.AddPoint(50.02, 36.22);
ring.AddPoint(49.99, 36.26);
ring.AddPoint(49.97, 36.23);
ring.AddPoint(49.98, 36.17);
ring.AddPoint(50.02, 36.22);

polygon.ExteriorRing = ring;

创建多边形

// For complete examples and data files, please go to https://github.com/aspose-gis/Aspose.GIS-for-.NET
LinearRing firstRing = new LinearRing();
firstRing.AddPoint(8.5, -2.5);
firstRing.AddPoint(-8.5, 2.5);
firstRing.AddPoint(8.5, -2.5);
Polygon firstPolygon = new Polygon(firstRing);

LinearRing secondRing = new LinearRing();
secondRing.AddPoint(7.6, -3.6);
secondRing.AddPoint(-9.6, 1.5);
secondRing.AddPoint(7.6, -3.6);
Polygon secondPolygon = new Polygon(secondRing);

MultiPolygon multiPolygon = new MultiPolygon();
multiPolygon.Add(firstPolygon);
multiPolygon.Add(secondPolygon);

创建带孔的多边形

// For complete examples and data files, please go to https://github.com/aspose-gis/Aspose.GIS-for-.NET
Polygon polygon = new Polygon();

LinearRing ring = new LinearRing();
ring.AddPoint(50.02, 36.22);
ring.AddPoint(49.99, 36.26);
ring.AddPoint(49.97, 36.23);
ring.AddPoint(49.98, 36.17);
ring.AddPoint(50.02, 36.22);

LinearRing hole = new LinearRing();
hole.AddPoint(50.00, 36.22);
hole.AddPoint(49.99, 36.20);
hole.AddPoint(49.98, 36.23);
hole.AddPoint(50.00, 36.24);
hole.AddPoint(50.00, 36.22);

polygon.ExteriorRing = ring;
polygon.AddInteriorRing(hole);

创建几何集合

// For complete examples and data files, please go to https://github.com/aspose-gis/Aspose.GIS-for-.NET
Point point = new Point(40.7128, -74.006);

LineString line = new LineString();
line.AddPoint(78.65, -32.65);
line.AddPoint(-98.65, 12.65);

GeometryCollection geometryCollection = new GeometryCollection();
geometryCollection.Add(point);
geometryCollection.Add(line);