The Infrastructure for Geospatial Information consists of an information component, where the bearers of geoinformation are geospatial data, and a metainformation component. The bearers of metainformation are metadata, which describe these geospatial data. Metadata serve as a tool for discovery, retrieve and evaluation of geospatial data within the Infrastructure of Geospatial Information. In order to acquire metadata from a metadata producer to a metadata consumer, the implementation of various tools - components of Metainformation Infrastructure for Geospatial Information is required. This paper describes the main principles and components of Metainformation infrastructure and the possibility of using open source tools for their implementation in practice.