Integration of TLS, close range photogrammetry and spatial information systems

This paper describes a methodology based on combining TLS and close range photogrammetry aimed at generating the geometry of 3-D surfaces as well as 3D real textured models and map products for further study. Also, a spatial information system based on spherical photograph is presented that allows performing virtual tours as well as geo-referencing graphical or numerical data derived from the TLS or photogrammetric survey. The methodology is applied to the survey of the Llonín Cave, Asturias, in the Northwest of Spain.