Constructor (Snowflake)

Note

Please always keep the schema name SEDONA (e.g., SEDONA.ST_GeomFromWKT) when you use Sedona functions to avoid conflicting with Snowflake's built-in functions.

ST_GeomFromEWKT¶

Introduction: Construct a Geometry from OGC Extended WKT

Format: ST_GeomFromEWKT (EWkt:string)

SQL example:

SELECT ST_AsText(ST_GeomFromEWKT('SRID=4269;POINT(40.7128 -74.0060)'))

Output:

POINT(40.7128 -74.006)

ST_GeomFromGML¶

Introduction: Construct a Geometry from GML.

Format: ST_GeomFromGML (gml:string)

SQL example:

SELECT ST_GeomFromGML('
    <gml:LineString srsName="EPSG:4269">
        <gml:coordinates>
            -71.16028,42.258729
            -71.160837,42.259112
            -71.161143,42.25932
        </gml:coordinates>
    </gml:LineString>
')

Output:

LINESTRING (-71.16028 42.258729, -71.160837 42.259112, -71.161143 42.25932)

ST_GeomFromGeoHash¶

Introduction: Create Geometry from geohash string and optional precision

Format: ST_GeomFromGeoHash(geohash: string, precision: int)

SQL example:

SELECT ST_GeomFromGeoHash('s00twy01mt', 4)

Output:

POLYGON ((0.703125 0.87890625, 0.703125 1.0546875, 1.0546875 1.0546875, 1.0546875 0.87890625, 0.703125 0.87890625))

ST_GeomFromGeoJSON¶

Introduction: Construct a Geometry from GeoJson

Format: ST_GeomFromGeoJSON (GeoJson:string)

SQL example:

SELECT ST_GeomFromGeoJSON('{
   "type":"Feature",
   "properties":{
      "STATEFP":"01",
      "COUNTYFP":"077",
      "TRACTCE":"011501",
      "BLKGRPCE":"5",
      "AFFGEOID":"1500000US010770115015",
      "GEOID":"010770115015",
      "NAME":"5",
      "LSAD":"BG",
      "ALAND":6844991,
      "AWATER":32636
   },
   "geometry":{
      "type":"Polygon",
      "coordinates":[
         [
            [-87.621765, 34.873444],
            [-87.617535, 34.873369],
            [-87.62119, 34.85053],
            [-87.62144, 34.865379],
            [-87.621765, 34.873444]
         ]
      ]
   }
}')

Output:

POLYGON ((-87.621765 34.873444, -87.617535 34.873369, -87.62119 34.85053, -87.62144 34.865379, -87.621765 34.873444))

SQL example:

SELECT ST_GeomFromGeoJSON('{
   "type":"Polygon",
   "coordinates":[
      [
         [-87.621765, 34.873444],
         [-87.617535, 34.873369],
         [-87.62119, 34.85053],
         [-87.62144, 34.865379],
         [-87.621765, 34.873444]
      ]
   ]
}')

Output:

POLYGON ((-87.621765 34.873444, -87.617535 34.873369, -87.62119 34.85053, -87.62144 34.865379, -87.621765 34.873444))

ST_GeomFromKML¶

Introduction: Construct a Geometry from KML.

Format: ST_GeomFromKML (kml:string)

SQL example:

SELECT ST_GeomFromKML('
    <LineString>
        <coordinates>
            -71.1663,42.2614
            -71.1667,42.2616
        </coordinates>
    </LineString>
')

Output:

LINESTRING (-71.1663 42.2614, -71.1667 42.2616)

ST_GeomFromText¶

Introduction: Construct a Geometry from WKT. If SRID is not set, it defaults to 0 (unknown). Alias of ST_GeomFromWKT

Format: ST_GeomFromText (Wkt:string) ST_GeomFromText (Wkt:string, srid:integer)

SQL example:

SELECT ST_GeomFromText('POINT(40.7128 -74.0060)')

Output:

POINT(40.7128 -74.006)

ST_GeomFromWKB¶

Introduction: Construct a Geometry from WKB string or Binary. This function also supports EWKB format.

Format: ST_GeomFromWKB (Wkb:string) ST_GeomFromWKB (Wkb:binary)

SQL example:

SELECT ST_GeomFromWKB([01 02 00 00 00 02 00 00 00 00 00 00 00 84 D6 00 C0 00 00 00 00 80 B5 D6 BF 00 00 00 60 E1 EF F7 BF 00 00 00 80 07 5D E5 BF])

Output:

LINESTRING (-2.1047439575195312 -0.354827880859375, -1.49606454372406 -0.6676061153411865)

SQL example:

SELECT ST_asEWKT(ST_GeomFromWKB('01010000a0e6100000000000000000f03f000000000000f03f000000000000f03f'))

Output:

SRID=4326;POINT Z(1 1 1)

ST_GeomFromWKT¶

Introduction: Construct a Geometry from WKT. If SRID is not set, it defaults to 0 (unknown).

Format: ST_GeomFromWKT (Wkt:string) ST_GeomFromWKT (Wkt:string, srid:integer)

The optional srid parameter was added in v1.3.1

SQL example:

SELECT ST_GeomFromWKT('POINT(40.7128 -74.0060)')

Output:

POINT(40.7128 -74.006)

ST_LineFromText¶

Introduction: Construct a Line from Wkt text

Format: ST_LineFromText (Wkt:string)

SQL example:

SELECT ST_LineFromText('LINESTRING(1 2,3 4)')

Output:

LINESTRING (1 2, 3 4)

ST_LineStringFromText¶

Introduction: Construct a LineString from Text, delimited by Delimiter

Format: ST_LineStringFromText (Text:string, Delimiter:char)

SQL example:

SELECT ST_LineStringFromText('-74.0428197,40.6867969,-74.0421975,40.6921336,-74.0508020,40.6912794', ',')

Output:

LINESTRING (-74.0428197 40.6867969, -74.0421975 40.6921336, -74.050802 40.6912794)

ST_MLineFromText¶

Introduction: Construct a MultiLineString from Wkt. If srid is not set, it defaults to 0 (unknown).

Format: ST_MLineFromText (Wkt:string) ST_MLineFromText (Wkt:string, srid:integer)

SQL example:

SELECT ST_MLineFromText('MULTILINESTRING((1 2, 3 4), (4 5, 6 7))')

Output:

MULTILINESTRING ((1 2, 3 4), (4 5, 6 7))

ST_MPolyFromText¶

Introduction: Construct a MultiPolygon from Wkt. If srid is not set, it defaults to 0 (unknown).

Format: ST_MPolyFromText (Wkt:string) ST_MPolyFromText (Wkt:string, srid:integer)

SQL example:

SELECT ST_MPolyFromText('MULTIPOLYGON(((0 0 1,20 0 1,20 20 1,0 20 1,0 0 1),(5 5 3,5 7 3,7 7 3,7 5 3,5 5 3)))')

Output:

MULTIPOLYGON (((0 0, 20 0, 20 20, 0 20, 0 0), (5 5, 5 7, 7 7, 7 5, 5 5)))

ST_MakePoint¶

Introduction: Creates a 2D, 3D Z or 4D ZM Point geometry. Use ST_MakePointM to make points with XYM coordinates. Z and M values are optional.

Format: ST_MakePoint (X:decimal, Y:decimal, Z:decimal, M:decimal)

Example:

SELECT ST_AsText(ST_MakePoint(1.2345, 2.3456));

Output:

POINT (1.2345 2.3456)

Example:

SELECT ST_AsText(ST_MakePoint(1.2345, 2.3456, 3.4567));

Output:

POINT Z (1.2345 2.3456 3.4567)

Example:

SELECT ST_AsText(ST_MakePoint(1.2345, 2.3456, 3.4567, 4));

Output:

POINT ZM (1.2345 2.3456 3.4567 4)

ST_Point¶

Introduction: Construct a Point from X and Y

Format: ST_Point (X:decimal, Y:decimal)

In v1.4.0 an optional Z parameter was removed to be more consistent with other spatial SQL implementations. If you are upgrading from an older version of Sedona - please use ST_PointZ to create 3D points.

SQL example:

SELECT ST_Point(double(1.2345), 2.3456)

Output:

POINT (1.2345 2.3456)

ST_PointFromText¶

Introduction: Construct a Point from Text, delimited by Delimiter

Format: ST_PointFromText (Text:string, Delimiter:char)

SQL example:

SELECT ST_PointFromText('40.7128,-74.0060', ',')

Output:

POINT (40.7128 -74.006)

ST_PointZ¶

Introduction: Construct a Point from X, Y and Z and an optional srid. If srid is not set, it defaults to 0 (unknown). Must use ST_AsEWKT function to print the Z coordinate.

Format: ST_PointZ (X:decimal, Y:decimal, Z:decimal)

Format: ST_PointZ (X:decimal, Y:decimal, Z:decimal, srid:integer)

SELECT ST_AsEWKT(ST_PointZ(1.2345, 2.3456, 3.4567))

Output:

POINT Z(1.2345 2.3456 3.4567)

ST_PolygonFromEnvelope¶

Introduction: Construct a Polygon from MinX, MinY, MaxX, MaxY.

Format: ST_PolygonFromEnvelope (MinX:decimal, MinY:decimal, MaxX:decimal, MaxY:decimal)

SELECT ST_PolygonFromEnvelope(double(1.234),double(2.234),double(3.345),double(3.345))

Output:

POLYGON ((1.234 2.234, 1.234 3.345, 3.345 3.345, 3.345 2.234, 1.234 2.234))

ST_PolygonFromText¶

Introduction: Construct a Polygon from Text, delimited by Delimiter. Path must be closed

Format: ST_PolygonFromText (Text:string, Delimiter:char)

SQL example:

SELECT ST_PolygonFromText('-74.0428197,40.6867969,-74.0421975,40.6921336,-74.0508020,40.6912794,-74.0428197,40.6867969', ',')

Output:

POLYGON ((-74.0428197 40.6867969, -74.0421975 40.6921336, -74.050802 40.6912794, -74.0428197 40.6867969))

Last update: April 11, 2024 00:47:00