Why are my buffered points oblong and not circles in SQL Server Management Studio - Spatial Results

When I apply STBuffer (1) to a point in SQL Server Spatial, they appear as an oblong circle, not an ideal circle. Why is this?

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The selected forecast is Equirectangular , not the more familiar Mercator , which we see in Google Maps and Bing Maps. Change this and the dots will be displayed as expected.

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Read more about map projection here: http://en.wikipedia.org/wiki/Map_projection

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