How do you design the database in web and mobile software projects related to Geographic Information Systems? How do you store latitude and longitude data? If you think that you need to choose between float or double because the data is in decimal form, you are mistaken. With the geography data type in Microsoft SQL Server, you can store and use location data very flexibly (polygon - polyline). I have tried to explain my research on this topic in a practical way; you can read more in detail at https://medium.com/@kadircolak1999/microsoft-sql-server-geography-60d124edbab5.