geo_h3cell_neighbors()

计算 H3 单元格邻居。

详细了解 H3 单元格。

语法

geo_h3cell_neighbors(h3cell)

详细了解语法约定。

参数

客户	类型​​	必需	说明
h3cell	string	✔	由 geo_point_to_h3cell() 算出的 H3 单元格令牌值。

返回

H3 单元格邻居的数组。 如果 H3 单元格无效，则查询会生成 null 结果。

示例

以下示例计算 H3 单元格邻居。

print neighbors = geo_h3cell_neighbors('862a1072fffffff')

输出

neighbors
["862a10727ffffff","862a10707ffffff","862a1070fffffff","862a10777ffffff","862a100dfffffff","862a100d7ffffff"]

以下示例计算包含其邻居的输入 H3 单元格的数组。

let h3cell = '862a1072fffffff';
print cells = array_concat(pack_array(h3cell), geo_h3cell_neighbors(h3cell))

输出

单元格
["862a1072fffffff","862a10727ffffff","862a10707ffffff","862a1070fffffff","862a10777ffffff","862a100dfffffff","862a100d7ffffff"]

以下示例计算 H3 单元格多边形 GeoJSON 几何图形集合。

let h3cell = '862a1072fffffff';
print cells = array_concat(pack_array(h3cell), geo_h3cell_neighbors(h3cell))
| mv-expand cells to typeof(string)
| project polygons = geo_h3cell_to_polygon(cells)
| summarize arr = make_list(polygons)
| project geojson = bag_pack("type", "Feature","geometry", bag_pack("type", "GeometryCollection", "geometries", arr), "properties", bag_pack("name", "polygons"))

输出

geojson

{"type": "Feature","geometry": {"type": "GeometryCollection","geometries": [ {"type":"Polygon","coordinates":[[[-74.0022744646159,40.735376026215022],[-74.046908029686236,40.727986222489115],[-74.060610712223664,40.696775140349033],[-74.029724408156682,40.672970047595463],[-73.985140983708192,40.680349049267583],[-73.971393761028622,40.71154393543933],[-74.0022744646159,40.735376026215022]]]}, {"type":"Polygon","coordinates":[[[-74.019448383546617,40.790439140236963],[-74.064132193843633,40.783038509825],[-74.077839665342211,40.751803958414136],[-74.046908029686236,40.727986222489115],[-74.0022744646159,40.735376026215022],[-73.988522328408948,40.766594382212254],[-74.019448383546617,40.790439140236963]]]}, {"type":"Polygon","coordinates":[[[-74.077839665342211,40.751803958414136],[-74.1224794808745,40.744383587828388],[-74.1361375042681,40.713156370029125],[-74.1052004095288,40.689365648097258],[-74.060610712223664,40.696775140349033],[-74.046908029686236,40.727986222489115],[-74.077839665342211,40.751803958414136]]]}, {"type":"Polygon","coordinates":[[[-74.060610712223664,40.696775140349033],[-74.1052004095288,40.689365648097258],[-74.118853750491638,40.658161927046628],[-74.0879619670209,40.634383824229609],[-74.043422283844933,40.641782462872115],[-74.029724408156682,40.672970047595463],[-74.060610712223664,40.696775140349033]]]}, {"type":"Polygon","coordinates":[[[-73.985140983708192,40.680349049267583],[-74.029724408156682,40.672970047595463],[-74.043422283844933,40.641782462872115],[-74.012581189358343,40.617990065981623],[-73.968047801220749,40.625358290164748],[-73.954305509472675,40.656529678451555],[-73.985140983708192,40.680349049267583]]]}, {"type":"Polygon","coordinates":[[[-73.926766604813565,40.718903205013063],[-73.971393761028622,40.71154393543933],[-73.985140983708192,40.680349049267583],[-73.954305509472675,40.656529678451555],[-73.909728515658443,40.663878222244435],[-73.895936872069854,40.69505685239637],[-73.926766604813565,40.718903205013063]]]}, {"type":"Polygon","coordinates":[[[-73.943844904976629,40.773964402038523],[-73.988522328408948,40.766594382212254],[-74.0022744646159,40.735376026215022],[-73.971393761028622,40.71154393543933],[-73.926766604813565,40.718903205013063],[-73.912969923470314,40.750105305345329],[-73.943844904976629,40.773964402038523]]]}]}, "properties": {"name": "polygons"}}

以下示例计算表示 H3 单元格及其邻居的多边形联合。

let h3cell = '862a1072fffffff';
print cells = array_concat(pack_array(h3cell), geo_h3cell_neighbors(h3cell))
| mv-expand cells to typeof(string)
| project polygons = geo_h3cell_to_polygon(cells)
| summarize arr = make_list(polygons)
| project polygon = geo_union_polygons_array(arr)

输出

polygon

{ "type": "Polygon", "coordinates": [[[ -73.926766604813565, 40.718903205013063],[ -73.912969923470314, 40.750105305345329],[ -73.943844904976629, 40.773964402038523],[ -73.988522328408948, 40.766594382212254],[ -74.019448383546617, 40.79043914023697],[ -74.064132193843633, 40.783038509825005],[ -74.077839665342211, 40.751803958414136],[ -74.1224794808745, 40.744383587828388],[ -74.1361375042681, 40.713156370029125],[ -74.1052004095288, 40.689365648097251],[ -74.118853750491638, 40.658161927046628],[ -74.0879619670209, 40.6343838242296],[ -74.043422283844933, 40.641782462872115],[ -74.012581189358343, 40.617990065981623],[ -73.968047801220749, 40.625358290164755],[ -73.954305509472675, 40.656529678451555],[ -73.909728515658443, 40.663878222244442],[ -73.895936872069854, 40.695056852396377],[ -73.926766604813565, 40.718903205013063]]]}

以下示例由于 H3 单元格令牌输入无效而返回 true。

print invalid = isnull(geo_h3cell_neighbors('abc'))

输出

无效
1