I just came across a spanish-language blog, called TopoNorte - the author features a wide variety of great geospatial and surveying content. Some items I thought were particularly great:
Cadastral mapping of Spain, using Google Maps: http://www.goolzoom.com/
And here, a publication on geodesy and UTM grids by Professor Ignacio Alonso Fernández-Coppel at the University of Valladolid:
http://www.elagrimensor.com.ar/elearning/lecturas/Las%20coordenadas%20geograficas.pdf
