Resumen
This paper describes the environmental project called www.ZmapujTo.cz which is intended to fight against illegal waste dumps in the Czech Republic with the use of geographic information systems (GIS). A smartphone/tablet GIS reporting application ZmapujTo has been developed. This freely available mobile application makes it possible to report illegal dumps and also overloaded containers of municipal waste. The project ZmapujTo is intended for public institutions, municipalities, all people who do not like illegal dumping in their cities, villages, countryside and forests, especially if they want to do something against people's bad environmental behaviour. Users of this mobile GIS application can report an illegal dump quickly and easily thanks to the use of their smartphones/tablets. Therefore, anybody can use the interactive public website form to report an illegal dump in the Czech Republic. The objective of this project is to contribute to the solution of the problem of environmental pollution by illegal dumps in the Czech Republic by making available a modern, effective and widespread GIS platform for their monitoring.