Geometric Operators
+
Description: Translation
Example:
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SELECT box '((0,0),(1,1))' + point '(2.0,0)' AS RESULT; result ------------- (3,1),(2,0) (1 row) |
-
Description: Translation
Example:
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SELECT box '((0,0),(1,1))' - point '(2.0,0)' AS RESULT; result --------------- (-1,1),(-2,0) (1 row) |
*
Description: Scaling out/rotation
Example:
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SELECT box '((0,0),(1,1))' * point '(2.0,0)' AS RESULT; result ------------- (2,2),(0,0) (1 row) |
/
Description: Scaling in/rotation
Example:
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SELECT box '((0,0),(2,2))' / point '(2.0,0)' AS RESULT; result ------------- (1,1),(0,0) (1 row) |
#
Description: Point or box of intersection
Example:
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SELECT box'((1,-1),(-1,1))' # box'((1,1),(-1,-1))' AS RESULT; result -------- (1,1),(-1,-1) (1 row) |
#
Description: Number of paths or polygon vertexs
Example:
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SELECT # path'((1,0),(0,1),(-1,0))' AS RESULT; result -------- 3 (1 row) |
@-@
Description: Length or circumference
Example:
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SELECT @-@ path '((0,0),(1,0))' AS RESULT; result -------- 2 (1 row) |
@@
Description: Center of box
Example:
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SELECT @@ circle '((0,0),10)' AS RESULT; result -------- (0,0) (1 row) |
##
Description: Closest point to first figure on second figure.
Example:
1 2 3 4 5 |
SELECT point '(0,0)' ## box '((2,0),(0,2))' AS RESULT; result -------- (0,0) (1 row) |
<->
Description: Distance between the two figures.
Example:
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SELECT circle '((0,0),1)' <-> circle '((5,0),1)' AS RESULT; result -------- 3 (1 row) |
&&
Description: Overlaps? (One point in common makes this true.)
Example:
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SELECT box '((0,0),(1,1))' && box '((0,0),(2,2))' AS RESULT; result -------- t (1 row) |
<<
Description: Is strictly left of (no common horizontal coordinate)?
Example:
1 2 3 4 5 |
SELECT circle '((0,0),1)' << circle '((5,0),1)' AS RESULT; result -------- t (1 row) |
>>
Description: Is strictly right of (no common horizontal coordinate)?
Example:
1 2 3 4 5 |
SELECT circle '((5,0),1)' >> circle '((0,0),1)' AS RESULT; result -------- t (1 row) |
&<
Description: Does not extend to the right of?
Example:
1 2 3 4 5 |
SELECT box '((0,0),(1,1))' &< box '((0,0),(2,2))' AS RESULT; result -------- t (1 row) |
&>
Description: Does not extend to the left of?
Example:
1 2 3 4 5 |
SELECT box '((0,0),(3,3))' &> box '((0,0),(2,2))' AS RESULT; result -------- t (1 row) |
<<|
Description: Is strictly below (no common horizontal coordinate)?
Example:
1 2 3 4 5 |
SELECT box '((0,0),(3,3))' <<| box '((3,4),(5,5))' AS RESULT; result -------- t (1 row) |
|>>
Description: Is strictly above (no common horizontal coordinate)?
Example:
1 2 3 4 5 |
SELECT box '((3,4),(5,5))' |>> box '((0,0),(3,3))' AS RESULT; result -------- t (1 row) |
&<|
Description: Does not extend above?
Example:
1 2 3 4 5 |
SELECT box '((0,0),(1,1))' &<| box '((0,0),(2,2))' AS RESULT; result -------- t (1 row) |
|&>
Description: Does not extend below?
Example:
1 2 3 4 5 |
SELECT box '((0,0),(3,3))' |&> box '((0,0),(2,2))' AS RESULT; result -------- t (1 row) |
<^
Description: Is below (allows touching)?
Example:
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SELECT box '((0,0),(-3,-3))' <^ box '((0,0),(2,2))' AS RESULT; result -------- t (1 row) |
>^
Description: Is above (allows touching)?
Example:
1 2 3 4 5 |
SELECT box '((0,0),(2,2))' >^ box '((0,0),(-3,-3))' AS RESULT; result -------- t (1 row) |
?#
Description: Intersect?
Example:
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SELECT lseg '((-1,0),(1,0))' ?# box '((-2,-2),(2,2))' AS RESULT; result -------- t (1 row) |
?-
Description: Is horizontal?
Example:
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SELECT ?- lseg '((-1,0),(1,0))' AS RESULT; result -------- t (1 row) |
?-
Description: Are horizontally aligned?
Example:
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SELECT point '(1,0)' ?- point '(0,0)' AS RESULT; result -------- t (1 row) |
?|
Description: Is vertical?
Example:
1 2 3 4 5 |
SELECT ?| lseg '((-1,0),(1,0))' AS RESULT; result -------- f (1 row) |
?|
Description: Are vertically aligned?
Example:
1 2 3 4 5 |
SELECT point '(0,1)' ?| point '(0,0)' AS RESULT; result -------- t (1 row) |
?-|
Description: Are perpendicular?
Example:
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SELECT lseg '((0,0),(0,1))' ?-| lseg '((0,0),(1,0))' AS RESULT; result -------- t (1 row) |
?||
Description: Are parallel?
Example:
1 2 3 4 5 |
SELECT lseg '((-1,0),(1,0))' ?|| lseg '((-1,2),(1,2))' AS RESULT; result -------- t (1 row) |
@>
Description: Contains?
Example:
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SELECT circle '((0,0),2)' @> point '(1,1)' AS RESULT; result -------- t (1 row) |
<@
Description: Contained in or on?
Example:
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SELECT point '(1,1)' <@ circle '((0,0),2)' AS RESULT; result -------- t (1 row) |
~=
Description: Same as?
Example:
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SELECT polygon '((0,0),(1,1))' ~= polygon '((1,1),(0,0))' AS RESULT; result -------- t (1 row) |
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