The article is an argumentative contribution of the author and represents his consideration of problems of the protection of Czech Republic's natural resources, and the embedding of this protection into the existing Czech cadastre of real estates. The Act [344/1992, as subsequently amended] lays down that the Cadastre of Real Estates of the Czech Republic is a source of information that serves the purpose of protection of not only rights to real estates but also of natural resources (section 1, subsection 3 of the Czech National Council Act No. 344/1992 Coll. on the Cadastre of Real Estates of the Czech Republic, as subsequently amended). Furthermore, a view of the given problems in the Slovak Republic is presented as well. In the Regulation No. 126/1993 Coll., as subsequently amended, issued by the Czech Office for Surveying, Mapping and Cadastre, data on parcels are given, namely characteristics of land types for purposes of the cadastre of real estates (land types, real estate uses, methods of real estate protection, type of parcel numbering, quality of land area determination, determination of legal relations, etc.).