What is your land's planning status?

The people who market you the land , give you some information about the land's planning status, but how could you know that information %100 correct? How could you be sure about your land's legal planning status, rights, or restrictive conditions? Especially foreigners are exposed to misleading information. Is your land in agricultural zone? Is it in earthquake zone? Is there any high-voltage transmission line on your land?  If one of these information delivered to you wrongfully it could cause non recoverable big losses. For example in Yalova someone sold a land to a foreign investor and also told him that he could build ten (10) villas on that property. However after years the investor found out that the land that he bought was in an agricultural zone and he could only build a 250m2 house. Another example to make it clear, you purchase a land and after years you find out that there was a Turkish Electricity Administration's right on your land for 49 years. Thus they have a right to confiscate it.