INSTRUCTING UNMANNED AERIAL VEHICLES TO LAND

In some examples, a system for instructing an unmanned aerial vehicle is provided. The system may include a delivery management service for processing orders for items available in connection with an electronic marketplace. The delivery management service may also determine a landing location for delivery of an item to a customer of the electronic marketplace. The landing location may correspond the customer's address. Determination of the landing location may be based on a first digital elevation dataset, a second digital elevation dataset, and parcel data corresponding to a region in which the customer's address is located. The unmanned aerial vehicle may access the landing location as part of delivering the item to the customer.