Critical Like other search engines, search index Nestoria is as accurate and current as the data obtained by its sources (portals and websites), which in turn depend on the data supplied by agents and individuals. The quality of these results depends on the motivation that estate agents have to update and supplement the information they have. In Spain and Italy, the housing market is based on non-exclusive contracts between sellers and estate agents. These agents try not to disclose accurate information to publish this property on the Web. In this case, the situation makes Nestoria is incapable of geocoding properties in a map with precision.