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I am storing polygons in an SQL server 2008 data base and I am aware of the hemisphere limitation.
http://blogs.msdn.com/b/isaac/archive/2009/02/06/the-geography-hemisphere-limitation.aspx
Is there a way to check before inserting/editing the polygon that it doesn’t exceed the hemisphere limitation?
The application this is used in is written in JavaScript and C#, so the check could be in either of these languages or sql.
The article you link to gives one answer: use
EnvelopeAngleto calculate half of the angle subtended by the geometrical object. If the result is >= 90, the object spans a hemisphere.Another approach is to handle the error after it happens (by catching the exception, or however the error is generated) rather than checking that a particular object may cause an error beforehand.