Cartographic patrimony in the Spanish SDI. The cadastral series

Currently, there is a clear commitment from the Spanish Civil Service for SDI (Spatial Data In-fraestructure) paradigm for access and use of geographic information of all kinds. This paper pre-sents a pilot test conducted by the Spanish IGN for publishing historical mapping through a WMS (Web Map Service). It describes the process of scanning, georeferencing, tiling and exploitation of information both literally and geometric for the mid-nineteenth cadastral series known as Hojas kilométricas. This is a simple but striking example, it offers clues to future possibilities of this strat-egy. It also identifies some difficulties