You need also to specifiy the right ring orientation. So why is ring orientation so important, and what is the

“right” ring orientation? To answer these questions, you have to ask yet another question: “What is the inside

of a Polygon?” You might instinctively say that the inside of a Polygon is the smallest area enclosed by the

coordinates you supply. But you could end up in a situation where your Polygon should be the larger area

enclosed by your coordinates. If you created a border around the North Pole, for instance, is your Polygon

the area within the border or is it the rest of the Earth minus the North Pole? Your answer to this question

determines what the “inside” of the Polygon really is.

The next step is to tell SQL Server where the inside of the Polygon lies. SQL Server’s geography instance

makes you define your coordinates in counterclockwise order, so the inside of the Polygon is everything that

falls on the left-hand side of the lines connecting the coordinates.

...........

This eliminates any ambiguity from your Polygon definitions.