Thopos is a software topography equipped with CAD autonomous instruments , entities and functionality targeted for use in field surveying . The program is suitable for surveyors and engineers and surveyors is a comprehensive and reliable to manage all operations topographic relief in the country , thanks to the controller integrated GPS , development, design to final drafting of the drawings . The trial version is valid for 15 days , is enabled by receiving numeric code that is controlled , via the Internet, every time you start the program .