title: Why does SQL Server GEOGRAPHY allow longitudes between -15069° and +15069°? Why ±15069°?
body: <p>I am using the Microsoft.SqlServer.Types DLL in my projects for validating Latitudes and Longitudes.</p>
  
  <p>The Library validates longitude values between -15069 and 15069 degrees instead from -180 to 180. 
  Can anybody explain what is the significance or reason that Microsoft is checking the longitude values to be between -15069 and 15069 degrees?</p>
  
  <p>Microsoft has listed the standards for Geo Spatial standards on this website which mentions the Longitude values MUST be between -15069 and 15069 degrees, inclusive.</p>
  
  <p><a href="https://msdn.microsoft.com/en-us/library/ee301753(v=sql.105).aspx">https://msdn.microsoft.com/en-us/library/ee301753(v=sql.105).aspx</a></p>
  
  <p>Your inputs in understanding this concept will be appreciated!</p>