Analytics Toolbox for Snowflake

Analytics Toolbox for Snowflake

Github Code

quadkey

You can learn more about quadkeys and quandints in the Overview section of the documentation.

QUADINT_BBOX

Description

Returns an array with the boundary box of a given quadint. This boundary box contains the minimum and maximum longitude and latitude. The output format is [West-South, East-North] or [min long, min lat, max long, max lat].

  • quadint: BIGINT quadint to get the bbox from.

Return type

ARRAY

Example

1
2
3
4
5

SELECT carto.QUADINT_BBOX(4388);
-- 22.5
-- -21.943045533438177
-- 45.0
-- 0.0

QUADINT_BOUNDARY

Description

Returns the boundary for a given quadint. We extract the boundary in the same way as when we calculate its QUADINT_BBOX, then enclose it in a GeoJSON and finally transform it into a geography.

  • quadint: BIGINT quadint to get the boundary geography from.

Return type

GEOGRAPHY

Example

1
2

SELECT carto.QUADINT_BOUNDARY(4388);
-- POLYGON((22.5 0, 22.5 -21.9430455334382, 22.67578125 ...

QUADINT_FROMGEOGPOINT

Description

Returns the quadint of a given point at a given level of detail.

  • point: GEOGRAPHY point to get the quadint from.
  • resolution: INT level of detail or zoom.

Return type

BIGINT

Example

1
2

SELECT carto.QUADINT_FROMGEOGPOINT(ST_POINT(40.4168, -3.7038), 4);
-- 4388

QUADINT_FROMLONGLAT

Description

Returns the quadint representation for a given level of detail and geographic coordinates.

  • longitude: DOUBLE horizontal coordinate of the map.
  • latitude: DOUBLE vertical coordinate of the map.
  • resolution: INT level of detail or zoom.

Return type

BIGINT

Example

1
2

SELECT carto.QUADINT_FROMLONGLAT(40.4168, -3.7038, 4);
-- 4388

QUADINT_FROMQUADKEY

Description

Returns the quadint equivalent to the input quadkey.

  • quadkey: STRING quadkey to be converted to quadint.

Return type

BIGINT

Example

1
2

SELECT carto.QUADINT_FROMQUADKEY("3001");
-- 4388

QUADINT_FROMZXY

Description

Returns a quadint from z, x, y coordinates.

  • z: INT zoom level.
  • x: INT horizontal position of a tile.
  • y: INT vertical position of a tile.

Constraints

Tile coordinates x and y depend on the zoom level z. For both coordinates, the minimum value is 0, and the maximum value is two to the power of z, minus one (2^z - 1).

Return type

BIGINT

Example

1
2

SELECT carto.QUADINT_FROMZXY(4, 9, 8);
-- 4388

QUADINT_KRING

Description

Returns all cell indexes in a filled square k-ring centered at the origin in no particular order.

  • origin: BIGINT quadint index of the origin.
  • size: INT size of the ring (distance from the origin).

Return type

ARRAY

Example

 1
 2
 3
 4
 5
 6
 7
 8
 9
10

SELECT carto.QUADINT_KRING(4388, 1);
-- 3844
-- 3876
-- 3908
-- 4356
-- 4388
-- 4420
-- 4868
-- 4900
-- 4932

QUADINT_KRING_DISTANCES

Description

Returns all cell indexes and their distances in a filled square k-ring centered at the origin in no particular order.

  • origin: BIGINT quadint index of the origin.
  • size: INT size of the ring (distance from the origin).

Return type

ARRAY

Example

 1
 2
 3
 4
 5
 6
 7
 8
 9
10

SELECT carto.QUADINT_KRING_DISTANCES(4388, 1);
-- {"index": "4388", "distance": "0"}
-- {"index": "4932", "distance": "1"}
-- {"index": "4900", "distance": "1"}
-- {"index": "4868", "distance": "1"}
-- {"index": "4420", "distance": "1"}
-- {"index": "4356", "distance": "1"}
-- {"index": "3908", "distance": "1"}
-- {"index": "3876", "distance": "1"}
-- {"index": "3844", "distance": "1"}

QUADINT_POLYFILL

Description

Returns an array of quadints that intersect with the given geography at a given level of detail.

  • geography: GEOGRAPHY geography to extract the quadints from.
  • resolution: INT level of detail or zoom.

Return type

ARRAY

Example

1
2
3
4
5
6
7

SELECT carto.QUADINT_POLYFILL(ST_MAKEPOLYGON(TO_GEOGRAPHY('LINESTRING(-3.71219873428345 40.4133653490709, -3.71440887451172 40.4096566128639, -3.70659828186035 40.4095259047756, -3.71219873428345 40.4133653490709)')), 17);
-- 207301334801
-- 207305529105
-- 207305529073
-- 207305529137
-- 207305529169
-- 207301334833

QUADINT_SIBLING

Description

Returns the quadint directly next to the given quadint at the same zoom level. The direction must be sent as argument and currently only horizontal/vertical movements are allowed.

  • quadint: BIGINT quadint to get the sibling from.
  • direction: STRING ‘right’|‘left’|‘up’|‘down’ direction to move in to extract the next sibling.

Return type

BIGINT

Example

1
2

SELECT carto.QUADINT_SIBLING(4388, 'up');
-- 3876

QUADINT_TOCHILDREN

Description

Returns an array with the children quadints of a given quadint for a specific resolution. A children quadint is a quadint of higher level of detail that is contained within the current quadint. Each quadint has four children by definition.

  • quadint: BIGINT quadint to get the children from.
  • resolution: INT resolution of the desired children.

Return type

ARRAY

Example

1
2
3
4
5

SELECT carto.QUADINT_TOCHILDREN(1155, 4);
-- 4356
-- 4868
-- 4388
-- 4900

QUADINT_TOPARENT

Description

Returns the parent quadint of a given quadint for a specific resolution. A parent quadint is the smaller resolution containing quadint.

  • quadint: BIGINT quadint to get the parent from.
  • resolution: INT resolution of the desired parent.

Return type

BIGINT

Example

1
2

SELECT carto.QUADINT_TOPARENT(4388, 3);
-- 1155

QUADINT_TOQUADKEY

Description

Returns the quadkey equivalent to the input quadint.

  • quadint: BIGINT quadint to be converted to quadkey.

Return type

STRING

Example

1
2

SELECT carto.QUADINT_TOQUADKEY(4388);
-- 3001

QUADINT_TOZXY

Description

Returns the zoom level z and coordinates x, y for a given quadint.

  • quadint: BIGINT quadint we want to extract tile information from.

Return type

OBJECT

Example

1
2
3

SELECT carto.QUADINT_TOZXY(4388);
-- z  x  y
-- 4  9  8