distance between two points across land using sql server

Posted by dpwb on Stack Overflow See other posts from Stack Overflow or by dpwb
Published on 2010-06-02T13:58:01Z Indexed on 2010/06/02 22:44 UTC
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Filed under:

sql-server

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sql-server-2008

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geospatial

|

spatial

I am looking to calculate the shortest distance between two points inside SQL Server 2008 taking into account land mass only.

I have used the geography data type along with STDistance() to work out point x distance to point y as the crow flies, however this sometimes crosses the sea which i am trying to avoid.

I have also created a polygon around the land mass boundary I am interested in.

I believe that I need to combine these two methods to ensure that STDistance always remains within polygon - unless there is a simpler solution.

Thanks for any advice

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