geo_s2cell_to_polygon()
適用於:✅Microsoft網狀架構✅Azure 數據✅總管 Azure 監視器✅Microsoft Sentinel
計算代表 S2 單元格矩形區域的多邊形。
深入瞭解 S2 單元格。
語法
geo_s2cell_to_polygon(
s2cell)
深入瞭解 語法慣例。
參數
姓名 | 類型 | 必要 | 描述 |
---|---|---|---|
s2cell | string |
✔️ | S2 單元格標記值,因為它是由geo_point_to_s2cell()計算。 S2 單元格標記的最大字串長度為 16 個字元。 |
傳回
GeoJSON 格式和動態數據類型的多邊形。 如果 s2cell 無效,查詢會產生 Null 結果。
注意
S2 單元格邊緣為球形地理區域。
範例
print s2cellPolygon = geo_s2cell_to_polygon("89c259")
輸出
s2cellPolygon |
---|
{ “type”: “Polygon”, “coordinates”: [[-74.030012249838478, 40.8012684339439], [-74.030012249838478, 40.7222262918358], [-73.935982114337421, 40.708880489804564], [-73.935982114337421, 40.787917134506841], [-74.030012249838478, 40.8012684339439]] } |
下列範例會組合 S2 單元格多邊形的 GeoJSON 幾何集合。
datatable(lng:real, lat:real)
[
-73.956683, 40.807907,
-73.916869, 40.818314,
-73.989148, 40.743273,
]
| project s2_hash = geo_point_to_s2cell(lng, lat, 10)
| project s2_hash_polygon = geo_s2cell_to_polygon(s2_hash)
| summarize s2_hash_polygon_lst = make_list(s2_hash_polygon)
| project bag_pack(
"type", "Feature",
"geometry", bag_pack("type", "GeometryCollection", "geometries", s2_hash_polygon_lst),
"properties", bag_pack("name", "S2 Cell polygons collection"))
輸出
資料行1 |
---|
{ “type”: “Feature”, “geometry”: {“type”: “GeometryCollection”, “geometries”: [ {“type”: “Polygon”, “coordinates”: [[[-74.030012249838478, 40.880202851376716], [-74.030012249838478, 40.8012684339439], [-73.935982114337421, 40.787917134506841], [-73.935982114337421, 40.866846163445771], [-74.030012249838478, 40.880202851376716]]]}, {“type”: “Polygon”, “coordinates”: [[[-73.935982114337421, 40.866846163445771], [-73.935982114337421, 40.787917134506841], [-73.84190634076248, 40.774477568182071], [-73.84190634076248, 40.853401155678846], [-73.935982114337421, 40.866846163445771]]}, {“type”: “Polygon”, “coordinates”: [[[-74.030012249838478, 40.8012684339439], [-74.030012249838478, 40.7222262918358], [-73.935982114337421, 40.708880489804564], [-73.935982114337421, 40.787917134506841], [-74.030012249838478, 40.8012684339439]]}] }, “properties”: {“name”: “S2 Cell polygons collection”} } |
下列範例會傳回 Null 結果,因為 s2cell 令牌輸入無效。
print s2cellPolygon = geo_s2cell_to_polygon("a")
輸出
s2cellPolygon |
---|