Create a SqlGeography polygon-circle from a center and radius

Question

I would like to save a circle in a sql-server 2008 geography field, using c#.

In c# I have a latitude, a longitude and a radius but I just can\'t find a way to calculate

Answer 1

OK, found the answer on my own. The trick is to create a point

var point = SqlGeography.Point(latitude, longitude, 4326);

Then create a buffer around the point

var poly = point.BufferWithTolerance(radiusInMeter, 0.01, true); //0.01 is to simplify the polygon to keep only a few sides

Then you could simply create a SqlCommand and add the polygon as parameter:

var param = new SqlParameter(@"Polygon", poly);
param.UdtTypeName = "Geography";
command.Parameters.Add(param);

Hope that will help someone else in the future!