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What are the basic that one should know about geometry datatype? How is it computed ? Why do we need geometry data type?

Edit: I wanted to know why there is a different datatype called geometry. Is geometry some basic data type plus location information or more! How to understand the data in this column?

Geometry

From MSDN: The planar spatial data type, geometry, is implemented as a common language runtime (CLR) data type in SQL Server. This type represents data in a Euclidean (flat) coordinate system.

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How basic do you need - point x,y, line xy,xy polygon xy1,xy2,xy3,xy1 –  Mapperz Nov 7 '11 at 15:11
    
@Mapperz Thank you so it's that simple !! –  kinkajou Nov 7 '11 at 19:10
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I think you need to explain more. What are you trying to understand? –  Nathan W Nov 7 '11 at 22:21
    
Are you refering to the difference between a "Geography" and a "Geometry" datatype as seen in MS SQL 2008? –  CatchingMonkey Nov 8 '11 at 10:07
    
@ASPMapper No I mean why geometry?How is it interpreated? –  kinkajou Nov 8 '11 at 12:14

1 Answer 1

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Hope This will help you http://www.postgresql.org/docs/8.2/static/datatype-geometric.html

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