* Entry point to construct the WKT for a single Geometry object. * * Parameters: * geometry - {<OpenLayers.Geometry.Geometry>} * * Returns: * {String} A WKT string of representing the geometry */ extractGeometry: function(geometry) { var type = geometry.CLASS_NAME.split('.')[2].toL...
2. MySQL 中的 WKT 数据类型 MySQL 中提供了用于存储 WKT 数据的数据类型,即GEOMETRY类型。GEOMETRY类型可以存储各种类型的空间对象,例如点、线、面等。 在MySQL 中,可以使用ST_GeomFromText函数将 WKT 数据转换为GEOMETRY类型的值,在插入数据时,可以将 WKT 数据作为字符串参数传递给该函数。 3. 插入 WKT 数据的...
MULTIPOLYGON(((1 1,5 1,5 5,1 5,1 1),(2 2,2 3,3 3,3 2,2 2)),((6 3,9 2,9 4,6 3))) GEOMETRYCOLLECTION(POINT(4 6),LINESTRING(4 6,7 10)) POINT ZM (1 1 5 60) POINT M (1 1 80) POINT EMPTY MULTIPOLYGON EMPTY...
For geographic SRS geometry arguments, if any argument has a longitude or latitude that is out of range, an error occurs: If a longitude value is not in the range (−180, 180], anER_LONGITUDE_OUT_OF_RANGEerror occurs. If a latitude value is not in the range [−90, 90], anER_LA...
The Well-Known Text (WKT) representation of Geometry is designed to exchange geometry data in ASCII form. Examples of the basic geometry types include: Geometry Types POINT LINESTRING POLYGON MULTIPOINT MULTILINESTRING MULTIPOLYGON GEOMETRYCOLLECTION ...
If the geometry is empty, then the keyword EMPTY is to be specified instead of the coordinate list. The EMPTY keyword must not be embedded within the coordinate list The following table provides some examples of possible text representations. Table 1. Geometry types and their text representations...
WKT_Test中使用STGeomFromText创建几何对象：摘自SQL Server 2008帮助 平面空间数据类型 geometry 是作为 ...
…将返回一个边界,然后您可以使用它以多种方式获取纬度/经度坐标: http://dev.openlayers.org/apidocs/files/OpenLayers/BaseTypes/Bounds-js.html# OpenLayers.Bounds 理想情况下,您会将矢量转换为 Geometry 对象,并使用 Bounds.intersectBounds() 根据 Map.getExtent() 检查它们以查看它们是否在当前视口中。 对...
Users can also opt to support multi geometries via either multi-types or geometry collections. The default is for only single feature selections to be supported. The outptu CRS can now be supplied by specifying an ESPG code. The default is -1 which does not apply a transformation. This is...
The following table provides some examples of possible text representations. Table 1. Geometry types and their text representations