spatial.getLayerBoundingBox

过程

返回图层的边界框

签名

spatial.getLayerBoundingBox(name :: STRING) :: (minX :: FLOAT, minY :: FLOAT, maxX :: FLOAT, maxY :: FLOAT, crs :: STRING)

输入参数

名称	类型	默认	描述
名称 (name)	STRING	null	层的名称

名称

类型

默认

描述

名称 (name)

STRING

null

层的名称

输出参数

名称	类型	描述
最小X	FLOAT
最小Y	FLOAT
最大X	FLOAT
最大Y	FLOAT
crs	STRING	CRS 使用 geotools 格式，例如 WGS84(DD)

名称

类型

描述

最小X

FLOAT

最小Y

FLOAT

最大X

FLOAT

最大Y

FLOAT

crs

STRING

CRS 使用 geotools 格式，例如 WGS84(DD)

示例

获取图层的边界框

CALL spatial.addPointLayer('bbox_layer', 'rtree', 'wgs84') YIELD node

节点

表 1. 结果
节点
`(:SpatialLayer { geomencoder: "SimplePointEncoder", index_type: "rtree", layer: "bbox_layer", layer_type: "SimplePointLayer", layercrs: "GEOGCS[\"WGS84(DD)\", \n DATUM[\"WGS84\", \n SPHEROID[\"WGS84\", 6378137.0, 298.257223563]], \n PRIMEM[\"Greenwich\", 0.0], \n UNIT[\"degree\", 0.017453292519943295], \n AXIS[\"Geodetic longitude\", EAST], \n AXIS[\"Geodetic latitude\", NORTH], \n AUTHORITY[\"EPSG\",\"4326\"]]" })`

(:SpatialLayer {
    geomencoder: "SimplePointEncoder",
    index_type: "rtree",
    layer: "bbox_layer",
    layer_type: "SimplePointLayer",
    layercrs: "GEOGCS[\"WGS84(DD)\", \n  DATUM[\"WGS84\", \n    SPHEROID[\"WGS84\", 6378137.0, 298.257223563]], \n  PRIMEM[\"Greenwich\", 0.0], \n  UNIT[\"degree\", 0.017453292519943295], \n  AXIS[\"Geodetic longitude\", EAST], \n  AXIS[\"Geodetic latitude\", NORTH], \n  AUTHORITY[\"EPSG\",\"4326\"]]"
})

在相对的角落添加点

CREATE (n1:Point {latitude: 60.0, longitude: 15.0, name: 'southwest'})
CREATE (n2:Point {latitude: 61.0, longitude: 16.0, name: 'northeast'})
WITH n1, n2
CALL spatial.addNode('bbox_layer', n1) YIELD node as added1
WITH n2, added1
CALL spatial.addNode('bbox_layer', n2) YIELD node as added2
RETURN added1, added2

CALL spatial.getLayerBoundingBox('bbox_layer') YIELD minX, minY, maxX, maxY, crs

表 2. 结果
crs	最大X	最大Y	最小X	最小Y
WGS84(DD)a	[source] ---- 16.0 ----	`61.0`	`15.0`	`60.0`