Flooding is a major problem for many countries causing damage to the environment and pressures on human activity. Engineers use Manning’s coefficient of roughness to determine water flow over floodplains which is a vital parameter in hydrodynamic studies. The coefficient is mainly a property of the ground surface texture and the changes in water surface elevation. The traditional method of dete...

This study proposes a new non-contact approach allows detecting, measuring and tracking the change of cracks in the historical structure using photogrammetric techniques and computer methods. The proposed procedure used an accurate generation of true orthophoto of the studied structure using precise 3D surface representations derived from laser scanning and several digital images that entirely ...

The Haghia Sophia in Istanbul belongs with its unique dome construction to the outstanding and extraordinary architectural structures in the whole world. Built between 532 and 537 during the Byzantine Emperor Justinian (527565), it reflects the sum of all experiences and knowledge of the classical antiquity and it is one of the important monuments of the world heritage. Nowadays the building is...

This paper describes the project of the Close Range Photogrammetry and Remote Sensing Group, University of Vigo, Spain, involving historic arch bridges in Galicia, Spain. The first aim of this Project consists on building a database of the historic arch bridges in Galicia, documenting location, surroundings, geometry, singular characteristics, structural faults, building material and state of c...

OBJECTIVES To set up a three-dimensional photogrammetric scanning system for precise landmark measurements, without any physical contact, using a low-cost and noninvasive digital photogrammetric solution, for supporting several necessity in clinical orthodontics and/or surgery diagnosis. MATERIALS AND METHODS Thirty coded targets were directly applied onto the subject's face on the soft tissu...

Visualization for structures of architectural significance and objects of importance to the World’s cultural heritage has recently been receiv ing more attention. Generally, TIN and Marching Cube algorithm are used as popular modelling method for these objects. When TIN is used, to connect all the measured points, there is a problem of connecting the object which must originally deviate and mus...

Various applications such as meteorology, climatology or hydrology require information about the soil hydraulic properties over large areas. Microwave radiometry is a promising approach to gather this type of information. The microwave emission from soils is strongly affected by the roughness of the soil surface. This effect has therefore to be quantified to get a reasonable estimation of the h...

Ichnology deals with the traces of prehistoric organisms and thus with the study of dinosaur footprints and tracks. This paper reports on a reliable and precise methodology developed to integrate high-resolution close range photogrammetry and range sensors for 3D surveys of dinosaur footprints. The 3D footprint and track models recovered here yield a great deal of accurate morphological and mor...

In spite of an undoubted richness of information produced by 3D optical technologies, in some cases, the method for generating a digital model from single 3D acquisitions involves the propagation of errors. These errors limit the overall metric accuracy attainable with such procedure. This happens when small 3D images are assembled together in order to model a large object. The authors present ...