Histocarto project: Application of GIS tools (georeferencing and geolocation) to improve the retrieval of graphic historical documents. The Histocarto project aims to create a geoportal where potential users can enjoy in an easy, comfortable and intuitive way, part of the historical cartographic and photographic heritage of the city of Granada, focusing mainly on urbanism and landscape. The retrieval of this kind of documents nowadays is not effective in other institutional webs, in profiles of social networks or in personal web sites. Through the appropriate methodology that includes: location, selection, digitization, description, georeferencing (cartography) and geolocation (photography), tiling and web publication. As a result we have obtained a geoportal or cartographic visualizer where we can carry out traditional textual searches improved with filters, more intuitive geographic searches, past-present comparison of documents, and link documents.