Search

[EN] The restoration of paintings on elements in cultural heritage buildings (fundamentally, churches) involves two structural problems: capturing the geometry of the construction element and its development. In many cases, the geometries are regular (e.g., cylinders, spheres, elliptical domes). However, there are cases in which the elements cannot be adapted to any known geometry, much less one that can be mathematically developed. The development of surfaces becomes essential for the restoration of paintings over "flat elements" (over which work is performed on the ground) that are subsequently transferred to the real surface (ceilings). The mathematical transformations that allow regular geometries to be developed are widely known (cartographic projections). However, when the geometry is irregular, there is no development. This study presents a new methodology based on differential rectification and its application for the development of oculi in the Los Santos Juanes Church (Valencia), whose geometry is completely irregular both in shape and as a result of construction defects (and damage caused by fire). The present study focuses on the restoration of paintings damaged by fire.

[EN] The Church of Asunción of Llíria (Valencia, Spain) is one of the best examples of the Valencian Baroque of the seventeenth century. This research has been based on the study of the building from an urban, historical, and especially, a constructive view. In fact, the location of this particular church is very unique because it is embedded within the mountain. For the construction of the church, first, it was necessary to dig into the mountain. Thus, there is a strong gap between the main entrance of the church and the rear. This research work provides the analysis of the ground humidity throughout the GPR technique. We have analyzed the subsoil of the whole church by various cuts or paths, longitudinal and transversal measurements that have allowed us to produce a three-dimensional model of the land on which the church stands. We have also analyzed the homogeneity or the heterogeneity of the land in each area and the presence of certain ground water routes. It has been analyzed the rising damp on the walls and pillars of the church. To this end, it has been employed a moisture analyzer and it has been obtained the moisture content over a period of six months. With this information it has been able to identify those points that are systematically wetter.

[EN] The knowledge of the 3D geometry for reverse engineering studies is based on images and/or distances. The use of scanner laser has replaced the photogrammetry in the last decade, due to its easy handling and intensive data provided. However it requires multiple data captures, a subsequent filtering and a complex data processing, and its accuracy is highly dependent on the material. These limitations mean that many times it will not be the best option (in addition to its high cost). The videogrammetry is capable of generating a high number of images (which implies a high number of points) in a shorter time and regardless of the type of material. This paper analyses the accuracy of a new videogrammetric system respect to two scanner lasers. Results obtained certify that videogrammetry reaches similar accuracy than EScan (high resolution portable 3D scanner for reverse engineering), and higher accuracy than architectural scanner laser. In both cases the time spent in the 3D model generation by means of videogrammetry results much lower and the process is completely automatic requiring no post-processing or filtering work. Finally videogrammetry also enables real 3D object visualization through anaglyphs in all desired positions, while laser systems cannot provide that kind of information. (C) 2016 Elsevier Ltd. All rights reserved.

[EN] In recent years, the laser scanner has become the most used tool for modelling buildings in pure documentation and structural studies. Laser scanning provides large numbers of points in a minimum amount of time with great precision. The point clouds generated and the subsequent mosaics (data fusion of different clouds) contain millions of points with a heterogeneous density that define the 3D geometry of the buildings. Often, the number of points results in excessive information without offering a better definition. As a result, it is necessary to analyse which points can be eliminated and which ones cannot, based on precision criteria, to obtain a precise geometry with the smallest possible number of points for each part of the building. The algorithm developed in this work reduces the point clouds (in mosaics made up of clouds with over 10 million points) with precision criteria by as much as 99% while still accurately resolving the geometry of the object. The developed process is automatic such that different models with different resolutions can be obtained simultaneously. As a result, we obtain single clouds with homogenous distributions and densities throughout the model of the building (based on multiple overlapping clouds), with a computational cost of only a few seconds per cloud. The final result is a complete model of the entire building with the optimal resolution for each element of the structure. (C) 2016 Elsevier Ltd. All rights reserved.

[EN] It is impossible to take accurate measurements in photogrammetry without first removing the distortion in images. This paper presents a methodology for correcting radial and tangential distortion and for determining the PBS (Point of Best Symmetry) without knowledge of the interior orientation parameters (IOPs). An analytical plumb-line calibration method is used, measuring only the coordinates of points on straight lines, regardless of the position and direction of these lines within the image. Points belonging to multiple lines can also be used since the effects on their X and Y coordinates are calculated independently. The results obtained on an image of a common scene, taken with a handheld non-metric camera, show a high degree of accuracy even with a minimum number of observables. And its application on a calibrated grid for engineering purposes with a semi-metric camera, results optimal even using a single image. (C) 2016 Elsevier Ltd. All rights reserved.

[EN] The investigation is important in the development of countries and his societies; the economies are not based only in the accumulation of capital, it's necessary a solid foundation of information, learning and adaptation. The development of the capacity inventiveness, obtained by means of the investment in investigation and development. The cataloging of the architectural heritage involves new challenges of conservation. The problem of the conservation is not new, but in the 20th century there are big advances in the methods of investigation no destructive. The Letter of Athens of 1931 defined the first bases of the conservation of the monuments. Between any of his recommendations stand out one of them that invites to keep the utility of the monuments so that it ensure the continuity of his life, with destinations that respect his historical character and/or artistic as it occurs in "la Lonja de Valencia". The origin of this thesis and his development is oriented in one of the lines of investigation that in the Memory of the IX Congress APEGA proposes in the section of professional Investigations (connections of the drawing with other fields) in his first appendix: GRAPHIC EXPRESSION AND HERITAGE: NEW METHODS OF ARCHITECTURAL LIFTING. This Thesis is centered around the utilize the SCANNER LASER 3D, the ELECTRONIC TOTAL STATION and other traditional methods, as new methods of Graphic Lifting and of precision in the field of the Architecture, to scale real and in the three-dimensional space. Choose the Lonja of Valencia has his sense by his Universal interest, when being the only existent building in Valencia considered Heritage of the Humanity by the UNESCO. Apply it to the Architectural Graphic Expression and Heritage supposes all an effort that has concretize in the following title: "THE ARCHITECTURAL GRAPHIC LIFTING OF PRECISION. THE JAMB OF THE PORTAL OF MAIN ACCESS TO LA LONJA DE LA SEDA DE VALENCIA". Has been vertebrated the present investigation with the, [ES] El conocimiento juega un papel cada vez más importante en el desarrollo de los países y sus sociedades; las economías no están basadas únicamente en la acumulación de capital, hace falta un sólido cimiento de información, aprendizaje y adaptación. Por medio del conocimiento se logra el desarrollo de la capacidad inventiva, obtenida mediante la inversión en investigación y desarrollo. La catalogación del patrimonio arquitectónico implica nuevos retos de conservación. El problema de la conservación no es nuevo, pero en el siglo XX se producen grandes avances en los métodos de investigación no destructivos. La Carta de Atenas de 1931 definió las primeras bases de la conservación de los monumentos. Entre alguna de sus recomendaciones, destaca una que invita a mantener la utilidad de los monumentos para que se asegure la continuidad de su vida, con destinos que respeten su carácter histórico y/o artístico como ocurre en la Lonja de Valencia. El origen de esta tesis y su desarrollo está orientado en una de las líneas de investigación propuesto en la Memoria del IX Congreso APEGA, en el apartado de Investigaciones profesionales (conexiones del dibujo con otros campos) en su primer apéndice: EXPRESIÓN GRÁFICA Y PATRIMONIO: NUEVOS MÉTODOS DE LEVANTAMIENTO ARQUITECTÓNICO. Esta Tesis se centra en torno a la utilización del ESCÁNER LÁSER 3D, la ESTACIÓN TOTAL ELECTRÓNICA y otros métodos tradicionales, como nuevos métodos de Levantamiento Gráfico y de precisión en el ámbito de la Arquitectura, a escala real y en el espacio tridimensional. Elegir la Lonja de Valencia tiene su sentido por su interés Universal, al ser el único edificio existente en Valencia considerado Patrimonio de la Humanidad por la UNESCO. Aplicarlo a la Expresión Gráfica Arquitectónica y Patrimonio supone todo un esfuerzo que se ha concretado en el siguiente título: EL LEVANTAMIENTO GRÁFICO ARQUITECTÓNICO DE PRECISIÓN. LA JAMBA DE LA PORTADA DE ACCESO PRINCIPAL A LA LONJA DE LA SEDA DE VALENCIA. Se ha ver, [CA] El coneixement té un rol cada vegada més important en el desenvolupament dels països i les seues societats; les economies no estan basades únicament en l'acumulació de capital, fa falta un sòlid fonament d'informació, aprenentatge i adaptació. Per mitjà del coneixement s'aconsegueix el desenvolupament de la capacitat inventiva, obtinguda mitjançant la inversió en investigació i desenvolupament. La catalogació del patrimoni arquitectònic implica nous reptes de conservació. El problema de la conservació no és nou, però al segle XX es produeixen grans avanços en els mètodes d'investigació no destructius. La Carta d'Atenes de 1931 va definir les primeres bases de la conservació dels monuments. Entre alguna de les seves recomanacions destacar la que convida a mantindre la utilitat dels monuments perquè s'assegure la continuïtat de la seua vida, amb destinacions que respecten el seu caràcter històric i/o artístic com ocorre en la Llotja de València. L'origen d'aquesta tesi i el seu desenvolupament està orientat en una de les línies d'investigació proposada en la Memòria de l'IX Congrés APEGA, en l'apartat de recerques professionals (connexions del dibuix amb altres camps) en el seu primer apèndix: EXPRESSIÓ GRÀFICA I PATRIMONI: NOUS MÈTODES D'AIXECAMENT ARQUITECTÒNIC. Aquesta Tesi se centra entorn de la utilització de l'ESCÀNER LÀSER 3D, l'ESTACIÓ TOTAL ELECTRÒNICA i altres mètodes tradicionals, com a nous mètodes d'Aixecament Gràfic i de precisió en l'àmbit de l'Arquitectura, a escala real i en l'espai tridimensional. Triar la Llotja de València té el seu sentit pel seu interès Universal, en ser l'únic edifici existent a València considerat Patrimoni de la Humanitat per la UNESCO. Aplicar-ho a l'Expressió Gràfica Arquitectònica i Patrimoni suposa tot un esforç que s'ha concretat en el següent títol: L'AIXECAMENT GRÀFIC ARQUITECTÒNIC DE PRECISIÓ. EL BRANCAL DE LA PORTADA D'ACCÉS PRINCIPAL A LA LLOTJA DE LA SEDA DE VALÈNCIA. S'ha vertebrat la present recerca amb la se

[ES] Se estudiará el workflow entre las técnicas de captación laser escáner/fotogrametría SFM para adquirir modelos con baja iluminación dotándolos de textura real. Además, se realizará un modelado final que incluya partes internas y externas para darle salida vía web con la creación de un visor de realidad virtual mediante la tecnología WebGL-JavaScript., [EN] Workflow study between the techniques of laser scanner / photogrammetry SFM to adquire low-light models providing them with real texture. In addition, a final modeling that includes internal and external for output via the web, with the creation of a virtual reality viewer by WebGL-JavaScript .

[ES] Con la realización este trabajo de final de grado titulado “Fotomodelado a partir de planteamientos SfM con aplicaciones libres y utilización de drone”, se pretende obtener el título de graduado en ingeniería geomática y topográfica. Dicho trabajo pretende explicar los pasos realizados para obtener un fotomodelado tanto aéreo como terrestre del Torreón del Castillo de Buñol. Hoy en día, las técnicas para la obtención de modelos 3D están en auge por las infinitas aplicaciones de estos modelos. La fotogrametría por SfM, es toda una nueva materia que está naciendo en estos instantes, y está despuntando en este campo de modelado pues es una técnica que nos permite con una cámara obtener modelos 3D de alta resolución. En este proyecto se abordara el estudio de esta nueva materia y su aplicación en el desarrollo de un modelo 3D. Al principio del trabajo se comentara una iniciación a la teoría de modelado por SfM ya que es totalmente novedosa y nos apoyaremos en esta nueva materia. Seguidamente se detallaran los pasos que se han realizado para llegar a la obtención del modelo 3D con software libre.

Nowadays, close-range photogrammetry and a laser scanner are the two most popular techniques in reconstruction of three-dimensional objects. This paper develops a methodology based on videogrammetry to reconstruct 3D objects more quickly than conventional photogrammetric techniques and more cheaply than a laser scanner. Videogrammetry allows the capture of thousands of points in a very short space of time (like a laser scanner) and the object s geometry and texture (frames are photographic images as stereo pairs). A system composed of a video camera and a turntable support with a double platform over it has been developed. This paper shows the design, construction and calibration of the system to model 3D objects contained on the support with pinpoint accuracy

Restoring cultural heritage is an extremely important job due to its immeasurable value. However, it also requires even greater attention in the case of a building. The actions taken on these constructions not only guarantee their preservation from the point of view of their historical value, but they also guarantee their stability as structures. The need to control historic buildings, analyzing their defects and their possible consequences, is decisive in preventing significant damage. This work demonstrates calculating the thickness of vaults in a church. It is easy to determine the interior and exterior 3D geometry of the church using scanner laser techniques. By combining both geometries, it is easy to determine the difference between the interior vaults and the roof of the church. However, the interior of both geometries is completely unknown, and it is not possible to act on their condition for structural consolidation purposes. This work shows the methods used to determine the interior sections of the vault thicknesses by referencing the internal geometry of both models with the interior of the church, using plumb line system scanning. The results obtained show accuracy better than 6 millimeters. © 2013 Elsevier Masson SAS. All rights reserved.

Herráez Boquera, J., Denia Rios, J.L., Navarro Esteve, P.J., Rodríguez Pereña, J., Martín Sánchez M.T."Epipolar image rectification through geometric algorithms with unknown parameters". JJ. Electron. Imaging. 22(4), 043021 (Dec 02, 2013). © (2013) Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. http://dx.doi.org/10.1117/1.JEI.22.4.043021, Image processing in photogrammetry is commonly used for scene reconstruction. Although two-dimensional applications can be solved using isolated images, reconstruction of three-dimensional scenes usually requires the use of multiple images simultaneously. Epipolar image rectification is a common technique for this purpose. It typically requires internal orientation parameters and, therefore, knowledge of camera calibration and relative orientation parameters between images. A reparameterization of the fundamental matrix through a completely geometric algorithm of seven parameters that enables the epipolar image rectification of a photogrammetric stereo pair without introducing any orientation parameters and without premarking ground control points is presented. The algorithm enables the generation of different stereoscopic models with a single photogrammetric pair from unknown cameras, scanned from a book, or frames from video sequences. Stereoscopic models with no parallaxes have been obtained with a standard deviation of <0.5 pixels. (C) 2013 SPIE and IS&T

Restoring the spans of a historic bridge requires installing tensors to ensure the structural and mechanical stability of the rows of stones that form the resistant body of the bridge. Once the positions where the structure-crossing tensors should be installed have been determined, the entry and exit points of each drill hole must be marked on both sides of the bridge. However, the exit point of each drill hole is not visible from the entry point, making it impossible to drill precisely. Here, we present a method based on a calibrated system that combines precision topography with laser technology. Using this method, drill holes longer than 12 m can be achieved with centimetric precision. © 2012 Elsevier Masson SAS. All rights reserved.

Esta Tesis aborda la simulación de incendios en varios entornos, utilizando para ello geometría real. Si queremos comprender el comportamiento de incendios específicos no es suficiente estudiar la simulación usando geometría no real. Para obtener la geometría aplicaremos un escáner de laser. Como la cantidad de puntos obtenidos por el escáner es excesiva estudiamos como obtener la geometría de la nube de puntos y transferirla de forma optima al programa de simulación. Se aborda: - Análisis y comparación de dos métodos para obtener parámetros que describan la geometría de nube de puntos obtenidos a partir de mediciones con escáner laser. Para ello se ha realizado un programa informático para poder aplicar los algoritmos sobre datos extraídos desde un escáner láser, analizar sus resultados y generar la simulación informática de incendios. - Su aplicación al estudio de un suceso real en la ciudad de Valencia y en el que quedan atrapados miembros del servicio de bomberos, comparado los hechos con la simulación virtual, para entender exactamente el desarrollo del fuego. - Se analiza también la comparación de sucesos reales en ambiente forestal con los resultados obtenidos mediante simulación con geometría real. El estudio sobre los fenómenos que se producen en los incendios forestales y que por su complejidad no se llegan a entender por parte del personal que interviene en la extinción ha provocado en algunos de los ejemplos estudiados resultados catastróficos. - Otro ambiente distinto al que se ha aplicado es el de fuego en túneles. El estudio ha servido para determinar la influencia de los pavimentos en el interior de un túnel en situación de incendio. Aportando como conclusión la diferencia que existe entre el aporte energético en el desarrollo del incendio con pavimento de mezclas bituminosas o pavimento de hormigón. El trabajo de investigación consta de un análisis de la situación actual para comprender la envergadura del problema. Seguidamente se realiza un estudio

The metric calibration of thermographic cameras would make possible the acquisition of geometric data if the principles of photogrammetry are followed. Both the distortion effects introduced in the images by the lens and the perspective effect can be corrected if the calibration parameters are known. This paper presents a calibration grid that allows the automatic metric calibration of thermographic cameras. This calibration grid is made of light and easy-to-find materials to guarantee its portability and handling. The calibration parameters obtained with the presented calibration grid are verified and compared with those obtained with a temperature-based calibration grid through the evaluation of the accuracy and repeatability in the modelling of a standard artefact previously certified. © 2012 IOP Publishing Ltd.

Infrared thermography has proved to be an adequate technique for building inspection, as it can be used to determine energy efficiency and also to detect defects in construction. Geometry and spatial relationships are also very important in building inspection because they make location of thermal defects and measurement of affected surfaces possible. A procedure to fuse automatically generated infrared mosaics and visible images to combine geometric information with thermal data in the same image is described in this paper. Fused images are then used for the automatic generation of a thermographic 3D model of the building through image matching, where apart from having thermographic information available, geometric measurements can be performed. The proposed methodology is suitable for building inspection, where working space and time are usually limited so a reduction on the number and size of instruments is appreciated. Furthermore, automation of the process diminishes the error in results by avoiding operator's influence.

[EN] The National Institute of Archaeology and History manages the documentation and preservation of the patrimony of Mexico, a country with an area of ??1.959.000 square kilometers, which is almost four times the size of Spain. To attend on all this patrimony, INAH has several departments. The National Coordination of Historical Monuments manages the monuments and architecture built from the colonial era. Inside the Coordination, the Technical Support Division manages the teams and the tools necessary for the survey, [ES] El Instituto Nacional de Arqueología e Historia gestiona la documentación y conservación del patrimonio de México un país con una extensión de 1.959000 kilómetros cuadrados, que casi cuadriplica la extensión de España. Para atender todo este Patrimonio el INAH cuenta con diversos departamentos. La Coordinación Nacional de Monumentos Históricos gestiona los monumentos y arquitecturas construidos a partir de la época virreinal. Dentro de la Coordinación, la Dirección de Apoyo Técnico gestiona los equipos e instrumentos necesarios para el levantamiento.

The dimensions of building façades and window apertures are usually determined by making direct measurements using tapes and plummets. This approach, however, has a number of drawbacks including the physical risk to which the persons making the measurements are exposed. This paper proposes an indirect approach based on close range photogrammetry that is inexpensive, simple, fast and safe, and which does not require specialist staff or direct ground control measurements. The method is based on taking a picture using a digital camera and measuring the distance to the object using a handheld laser distance meter. Both items of equipment are mounted on a specially designed support that allows the laser distance meter to move independently of the camera.

Photogrammetry is a science with many fields of application in civil engineering where image processing is used for different purposes. In most cases, the use of multiple images simultaneously for the reconstruction of 3D scenes is commonly used. However, the use of isolated images is becoming more and more frequent, for which it is necessary to calculate the orientation of the image with respect to the object space (exterior orientation), which is usually made through three rotations through known points in the object space (Euler angles). We describe the resolution of this problem by means of a single rotation through the vanishing line of the image space and completely external to the object, to be more precise, without any contact with it. The results obtained appear to be optimal, and the procedure is simple and of great utility, since no points over the object are required, which is very useful in situations where access is difficult.

Se trata de exponer el sistema de orientación adoptado para la realización de perforaciones de gran longitud, en las que el punto de entrada del taladro y el punto de salida de la perforación están prefijados, y donde la precisión es determinante para la obtención de un buen resultado en la realización posterior de los anclajes. Se analizan métodos de orientación directos que permiten dirigir el sistema pero obtienen poca precisión o no admiten una comprobación continua; no permitiendo tener en cuenta las posibles desviaciones por holguras o caída del taladro durante la perforación. El sistema adoptado es una alineación de los controles del taladro, guiada por un replanteo topográfico. Se estudia la geometría de la perforación y su implementación en cualquier posición del espacio para garantizar la máxima precisión en el direccionamiento., This work presents a system to guide the work of making long perforations whose drill entry points and drill exit points are established, and where accuracy is crucial to obtain a good result for subsequent anchorages. Direct guidance methods that allow a control of the system were analysed. However, they proved poorly accurate or did not make continuous verifications possible, and did not allow possible deviations from the drill becoming loose or falling while drilling to be taken into account. The adopted system is an alignment of the drill controls and the topography of the surfaces is reconsidered. The geometry of the drilling and its implementation in any position of the surface is analysed to ensure maximum accuracy in the drilling direction.

La evolución de la instrumentación para la obtención de cartografía desde los métodos de fotogrametría de principio de siglo basados en mediciones angulares y un pequeño apoyo topográfico. Con la aparición de instrumentos capaces de medir distancia rápidamente (100 puntos por segundo), la fotogrametría ha evolucionado pues ahora integra la medición de distancia dentro de su propio ámbito. La combinación de mediciones angulares y de distancia con scanner de láser y tomas fotogramétricas se revelan como un método sencillo y rentable de obtención de modelos tridimensionales, así como cualquier tipo de representación bajo límites muy poco estrictos. Sin embargo dado el tamaño de los archivos generados se requiere para su óptimo aprovechamiento el desarrollo de nuevas aplicaciones que permitan obtener las representaciones deseadas con equipos de bajo coste., It is described the evolution of the instrumentation employed in cartography, starting from the photogrammetric methods from the beginning of the last century, based on angular measures and a topographic support. With the development of instruments capable of measuring distances efficiently (100 spots per second), photogrammetry evolved to a subject that, nowadays, includes the measuring of distances by itself. The combination of angular measures and distance by means of a laser scanner and photogrammetric instruments are a simple and affordable method for achieving three-dimensional models, as well as any other sort of representation with few limitations. However, the size of the archives generated, necessary for the optimization of the information, calls for the development of new applications that allow processing the desired information with low budget equipment.

En las intervenciones arqueológicas la necesidad de dar cuenta de un modo científico del estado real de los yacimientos es una labor esencial. Para este cometido es necesario documentar gráficamente la geometría de los restos arqueológicos y su relación con el entorno de la manera más fidedigna posible. En los últimos años se ha dado un gran salto en la calidad y cantidad de la información geométrica que se puede obtener. Estas posibilidades en alza han estimulado la exigencia cada vez mayor de la rigurosidad en los levantamientos. Como muestra de las posibilidades de actuación aplicando tecnologías innovadoras se presenta este trabajo consistente en el levantamiento y modelizado de la muralla y barbacana descubierta en pleno centro de la ciudad de Sevilla con motivo de las obras del nuevo tren metropolitano. La singularidad del caso radica en que se trata de unos restos que serán extraídos de su ubicación actual para ser repuestos nuevamente una vez terminadas las obras de la estación de metro que se ubicará justo en esa localización pero a una cota inferior. En la actualidad no se ha tomado la decisión política sobre la posibilidad de ser nuevamente sepultados para permitir recuperar la configuración previa de la calle donde se descubrieron, o mantenerlos expuestos con la consecuente eliminación del tráfico de vehículos en la calle. De optarse por la primera opción correspondería al resultado de nuestro trabajo la responsabilidad de erigirse como referente virtual de unos restos arqueológicos inaccesibles. Con ocasión del trabajo se tendrá oportunidad de contrastar los resultados de la aplicación de técnicas de levantamiento mediante estación total láser, fotogrametría digital no métrica y escaneado láser tridimensional, In archaeology, the necessity of scientifically stating the real condition of deposits is an essential work. For this task it is necessary to graphically document the geometry of the archaeological rests and their relationship with the environment in as accurate a way as possible. Over the last few years, great advances have been made in the quality and amount of the geometric information that can be obtained. These new possibilities incur difficulties regarding the required vigorous measurement and analysis of the data, however much improved results can be obtained. As an example of the performance possibilities, applying innovating technologies, we present this work consisting on the survey and modelling of the wall and barbican, discovered in the city of Seville, during the works of the new metropolitan train. The singularity of the case is that the wall will be extracted from its present location to be replaced back again once works of the tube station that will be located just in that location but to an inferior level finishes. At present the political decision between, being buried to allow the recovering of the previous configuration of the street, where they were discovered, or to be left exposed with the consequent elimination of the traffic of vehicles in the street, has not been taken yet. If the decision taken is the first option, our work would have the responsibility of being the virtual reference of an inaccessible archaeological rest. As a result of this work, we will have opportunity to check the results of the application of these techniques of survey by laser total station, non-metric digital photogrammetry and three-dimensional laser scanning