37º IAHS World Congress on Housing: - Universidad de Cantabria

XXXVII <strong>IAHS</strong><strong>World</strong> <strong>Congress</strong> on HousingOctober 26 – 29, 2010, Santander, SpainCODE: 416DEFINITION OF LOCAL GEODETIC NETWORKS FORURBAN DEVELOPMENTR. Pereda, E. Castillo, J. M. De Luis and M. L. RuizÁrea de Ingeniería Cartográfica, Geodesia y Fotogrametría, E.T.S.I. Caminos, Canales y Puertos, Universidad deCantabria. Avda. Los Castros s/n, 39005, Santander.e-mail: peredar@unican.esKey words: surveying, urban development, GPS, topographic station, leveling, reference system.AbstractAn orderly urban development for planning strategic performances requires a georreferencedsupport. In this sense, in the last few years different municipal corporations have defined anetwork of points with coordinates referred to a reference system.This kind of network is used as support for public works in urban development and it must beupdated and completed periodically.The establishment of a new reference system in Spain for defining the new reference framesdirectly in ETRS89 makes necessary new observations of control points in order to calculatetheir coordinates. If it’s possible it would be appropriate to use GPS, levelling andtopographic stations measurements.This article explains the topographic processes, design criteria and accuracy which arenecessary for establish this kind of networks. We have applied the present methodology to theMunicipal Council of Torrelavega (Cantabria-Spain) with the aim of placing more controlpoints and recalculating the 1998 municipal network.37º <strong>IAHS</strong> <strong>World</strong> <strong>Congress</strong> On Housing Science 206