geo_geohash_neighbors()
適用対象: ✅Microsoft Fabric✅Azure データ エクスプローラー✅Azure Monitor✅Microsoft Sentinel
Geohash ネイバーを計算します。
geohash
に関する詳細をご覧ください。
構文
geo_geohash_neighbors(
geohash)
構文規則について詳しく知る。
パラメーター
件名 | タイプ | Required | 説明 |
---|---|---|---|
geohash | string |
✔️ | geo_point_to_geohash()によって計算された geohash 値。 geohash 文字列*は 1 ~18 文字でなければなりません。 |
返品
Geohash 近隣の配列。 Geohash が無効な場合、クエリによって null 結果が生成されます。
例
次の例では、Geohash ネイバーを計算します。
print neighbors = geo_geohash_neighbors('sunny')
出力
近隣 |
---|
["sunnt","sunpj","sunnx","sunpn","sunnv","sunpp","sunnz","sunnw"] |
次の例では、入力 Geohash とその近傍の配列を計算します。
let geohash = 'sunny';
print cells = array_concat(pack_array(geohash), geo_geohash_neighbors(geohash))
出力
セル |
---|
["sunny","sunnt","sunpj","sunnx","sunpn","sunnv","sunpp","sunnz","sunnw"] |
次の例では、Geohash ポリゴン GeoJSON ジオメトリ コレクションを計算します。
let geohash = 'sunny';
print cells = array_concat(pack_array(geohash), geo_geohash_neighbors(geohash))
| mv-expand cells to typeof(string)
| project polygons = geo_geohash_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"))
出力
geojson |
---|
{"type": "Feature","geometry": {"type": "GeometryCollection","geometries": [ {"type":"Polygon","coordinates":[[[42.451171875,23.6865234375],[42.4951171875,23.6865234375],[42.495 1171875,23.73046875],[42.451171875,23.73046875],[42.451171875,23.6865234375]]}, {"type":"Polygon","coordinates":[[42.4072265625,23.642578125],[42.451171875,23.642578125],[42.451171 [875,23.6865234375],[42.4072265625,23.6865234375],[42.4072265625,23.642578125]]}, {"type":"Polygon","coordinates":[[42.4072265625,23.73046875],[42.451171875,23.73046875],[42.451171 [875,23.7744140625],[42.4072265625,23.7744140625],[42.4072265625,23.73046875]]}, {"type":"Polygon","coordinates":[[42.4951171875,23.642578125],[42.5390625,23.642578125],[42.539062 5,23.6865234375],[42.4951171875,23.6865234375],[42.4951171875,23.642578125]]}, {"type":"Polygon","coordinates":[[[42.451171875,23.73046875],[42.4951171875,23.73046875],[42.495117 1875,23.7744140625],[42.451171875,23.7744140625],[42.451171875,23.73046875]]}, {"type":"Polygon","coordinates":[[42.4072265625,23.6865234375],[42.451171875,23.6865234375],[42.451 171875,23.73046875],[42.4072265625,23.73046875],[42.4072265625,23.6865234375]]}, {"type":"Polygon","coordinates":[[[42.4951171875,23.73046875],[42.5390625,23.73046875],[42.539062 5,23.7744140625],[42.4951171875,23.7744140625],[42.4951171875,23.73046875]]}, {"type":"Polygon","coordinates":[[42.4951171875,23.6865234375],[42.5390625,23.6865234375],[42.5390625,23.73046875],[42.4951171875,23.73046875],[42.4951171875,23.6865234375]]}, {"type":"Polygon","coordinates":[[[42.451171875,23.642578125],[42.4951171875,23.642578125],[42.495117 1875,23.6865234375],[42.451171875,23.6865234375],[42.451171875,23.642578125]]}} "properties": {"name": "polygons"}} |
次の例では、Geohash とその近隣を表す多角形の和集合を計算します。
let h3cell = 'sunny';
print cells = array_concat(pack_array(h3cell), geo_geohash_neighbors(h3cell))
| mv-expand cells to typeof(string)
| project polygons = geo_geohash_to_polygon(cells)
| summarize arr = make_list(polygons)
| project polygon = geo_union_polygons_array(arr)
出力
多角形 |
---|
{"type":"Polygon","coordinates":[[[42.4072265625,23.642578125],[42.451171875,23.642578125],[42.4951171875,23.642578125],[42.5390625,23.642578125],[42.5390625,23.686523437500004],[42.5390625,23.730468750000004],[42.5390625,23.7744140625],[42.4951171875,23.7744140625],[42.451171875,23.7744140625],[42.407226562499993,23.7744140625],[42.4072265625,23.73046875],[42.4072265625,23.6865234375],[42.4072265625,23.642578125]]]} |
次の例では、Geohash トークンの入力が無効であるため、true を返します。
print invalid = isnull(geo_geohash_neighbors('a'))
出力
無効 |
---|
1 |