2015-07-01 22:01:50 +08:00
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Determine the spatial extent of a tile based on the tile's XYZ coordinate.
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#### Using the function
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Take a common tile with coordinates x=3, y=2, z=2,
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To determine its extent you would run,
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```sql
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SELECT CDB_XYZ_Extent(3,2,2)
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--- Returns a WKB polygon in Webmercator (SRID 3857)
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```
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2015-07-01 22:03:13 +08:00
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#### Arguments
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2015-07-01 22:01:50 +08:00
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CDB_XYZ_Extent(x,y,z)
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* **x** integer
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* **y** integer
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* **z** integer
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