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?


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.

  • How basic do you need - point x,y, line xy,xy polygon xy1,xy2,xy3,xy1 – Mapperz Nov 7 '11 at 15:11
  • 2
    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

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

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