Add description and images for ST_ExteriorRing #188
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| {% include sfs-1-2-1.html %} | ||
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| ### Examples | ||
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| {% highlight mysql %} | ||
| SELECT ST_ExteriorRing('POLYGON((0 -1, 0 2, 3 2, 3 -1, 0 -1))'); | ||
| -- Answer: LINEARRING(0 -1, 0 2, 3 2, 3 -1, 0 -1) |
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Can you add an example of a polygon with a hole? The point of this function is to contrast the exterior ring with the interior ring.
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ok I add an example of polygon with a hole , do you thing it's necessary add a comparison between ST_ExteriorRing and ST_InteriorRing?
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see #110