VARIABILIDAD DE LA LÍNEA DE COSTA A PARTIR DE IMÁGENES DE SATÉLITE Y SU RELACIÓN CON LA TEXTURA DEL SEDIMENTO

Beaches are natural environments of great interest for our society. They go through remarkable changes run by key factors that are interconnected according to the literature. A better understanding of these parameters, such as sediment texture and shoreline variability, would be of a great interest for coastal monitoring and planning. Shorelines of all Landsat 8 (OLI) images available over the course of one year have been obtained for determining the variability that has occurred in different Valencian beaches. Likewise, the relation between shoreline variability and sediment texture has been evaluated, showing that beaches with higher variability over the year have smaller sediment texture, which is also related with gentle slopes, and vice versa. The methodology allows obtaining the shoreline variability, a key parameter of beach morphodynamics, in a semiautomatic way. The variability allows developing a gross estimate of beach texture.http://dx.doi.org/10.4995/CIGeo2017.2017.6628

ANÁLISIS DE COMPONENTES PRINCIPALES DE IMÁGENES MULTIESPECTRALES EN EL ÁMBITO DEL ARTE RUPESTRE

This paper tackles principal component analysis (PCA) in images that include wavelengths between 380-1000 nm. Our approach is focussed on taking advantage of the potencial of ultraviolet and infrarred images, in combination with the visible ones, to improve documentation process and rock art analysis. In this way, we want to improve the discrimination between pigment and support rock, and analyse the spectral behaviour of rock art paintings in the ultraviolet and infrared regions. Three images were used, one image from the ultraviolet (UV) region, one from the visible region (VIS) and another one from the near infrared region (NIR). Optical filters coupled to the camera optics were used to take the images. These filters capture specific wavelengths excluding radiation that we are not interested in registering. Finally, PCA is applied to the acquired images. The results obtained demonstrate the PCA usefulness with imagery in this field and also it is possible to extract some conclusions about the correspondent paint pigments.http://dx.doi.org/10.4995/CIGeo2017.2017.6597

ANÁLISIS DE SISMICIDAD ASOCIADA AL LLENADO DE EMBALSES. CASO DEL CENTRO DE PRODUCCIÓN DE PIRRÍS (COSTA RICA)

The presented work is the result of a new collaboration between the Costa Rican Institute of Electricity (ICE) and the Technical University of Madrid (UPM) for the investigation of induced seismicity issues. Triggered seismicity associated with the filling of artificial water reservoirs is known since six decades ago. However, it is the case of triggered seismicity more complicated to model their effects. More than 100 cases of reservoir induced/triggered seismicity have been collected around the world and this issue continues today being a research topic of great importance. Indeed, new developments and contributions are constantly being made with the aim of achieve a better understanding of their characteristics and genesis. The main aim of the presented work is to analyze the spatial-temporal evolution of the seismic events recorded around the Pirrís reservoir before, during and after its filled. With the analysis of the seismic events we try to know and control the influence of the reservoir operations on the seismic activity of the area. Different parameters are studied, using methodologies proposed by different authors, in order to explain the possible effects of reservoir filling in changing the stress conditions in the environment and to detect any possible anomaly. Moreover, some analysis have been done in order to find a possible correlation between the water level in the reservoir and the evolution of the seismic activity recorded. Overall, the results of this study will provide important conclusions about the sensitivity of certain parameters to evaluate and model the effects of filling reservoirs on the seismic activity in the vicinity and we will present the spatial-temporal evolution of the seismicity associated with the specific case of the Pirrís hydraulic project.http://dx.doi.org/10.4995/CIGeo2017.2017.6666

VIABILIDAD Y OPERATIVA EN LA DIGITALIZACIÓN DE CASOS RUPESTRES PREHISTÓRICO DEL “ARTE SUREÑO”: RECETAS DIGITALES DESDE TÉCNICAS SFM Y PLATAFORMAS OPEN SOURCE

We present a case study on digitalization of Southern Rock Art (“Arte Sureño”) in a prehistoric rock shelter from Los Barrios, Cádiz (southern Iberian Peninsula); there we use SfM techniques to obtain some digital products for both analytic and divulgation goals. This way, we highlight some opportunities that low-cost devices (e.g. no-professional digital camera) and open software have introduced in archaeology today. We made it to converge in a working process to register and manage rock art expressions and their immediate surroundings (i.e. natural stone blocks, walls, niches…). From this action, we not only support our work in digital 3D about multiple and varied entities that make up the scenario and neighbour context of rock art through the use of multiple low cost / free resources, but also, we intend to adjust all this operative for the processes of investigation, protection and diffusion on the varied cases that make up this unique singular artistic heritage.http://dx.doi.org/10.4995/CIGeo2017.2017.6658

ESTIMACIÓN DEL RIESGO SÍSMICO EN CASTILLA - LA MANCHA PARA LA ELABORACIÓN DEL PLAN ESPECIAL DE EMERGENCIAS

An estimation of the seismic risk in Castilla - La Mancha (Spain) is set forth in the current work, in order to develop the special emergency programme. To carry out the study it has been necessary to define a multidisciplinary group of experts in each involved discipline: geology and tectonics, seismology, architecture, engineering and geographical information systems. The main aim is to develop different seismic risk maps to provide the basis to elaborate the emergency plans in Castilla - La Mancha. These plans must follow the stipulated guidelines in the seismic risk field. A probabilistic methodology is adopted to define the seismic risk, considering this as the human and material losses in presence of the expected seismic event. The seismic hazard of the area of study is evaluated through return periods of 475 and 975 years, equivalents to exceedance probabilities of 10% and 5% in 50 years respectively. These probabilities are proposed in the framework of the Spanish seismic code “Normativa Sismorresistente Española, NCSE-02”, for conventional and special buildings. In a first approach, the study attempt to estimates the expected losses in each city of the overall of Castilla - La Mancha in the presence of the probable movements in 50 and 100 years. The results allow us to make a relative estimation of the seismic risk in different areas, identify those cities which undergo highest damages indexes and which ones would require a more in-depth assessment so as to mitigate the risk. Besides, the results contribute to establish objective priorities to define emergency plans at city scale.http://dx.doi.org/10.4995/CIGeo2017.2017.6670

DIFERENTES PAISAJES Y ANÁLOGAS REPRESENTACIONES. INTERPRETACIÓN ARQUEOLÓGICA CON TECNOLOGÍAS DE INGENIERÍA INVERSA

In this paper we present new methods of the documentation and registration of the petroglyphs of the exceptional archaeological site located on Khor Fakkan, emirate of Sharjah, on the east coast of the United Arab Emirates along the Gulf of Oman, and coordinates 24º59'06.06'' N - 56º20'36.70'' E. The engravings on the surface of the serpentine rock fragments, of the Semail ophiolite complex that was generated when the Saudí plate was introduced under the Iran-Zagros, in the Cretaceous, are made with the technique and striped characteristic of the Bronze Age and Iron Age. We conducted the study respecting its conservation without any intervention on them, using the latest available technologies and performing aerial, terrestrial and near object digital photogrammetry and applying at the same time the methodology of Landscape Archaeology.http://dx.doi.org/10.4995/CIGeo2017.2017.6593

EPOS (EUROPEAN PLATE OBSERVATION SYSTEM)

EPOS (European Plate Observation System) (https://www.epos-ip.org/) is now established as the only European multidisciplinary and global research infrastructure in Earth Sciences. It integrates several hundred national observatories for the observation and measurement of the internal and dynamic structure of the planet, and in particular in Europe, distributed in 25 European countries, including Spain. The EPOS project, included in the 2008 ESFRI Roadmap, has been recognized by ESFRI in 2016 as a priority project for its implementation, because of its strategic relevance in the European Research Area.http://dx.doi.org/10.4995/CIGeo2017.2017.6615

DISEÑO DE ESTRATEGIAS DE CROWDSOURCING EN SISTEMAS DE INFORMACIÓN GEOGRÁFICA VOLUNTARIA

This work addresses voluntary geographic information (VGI) as an information system that facilitates organizations to achieve specific goals by outsourcing processes and activities to an online community. A definition of a voluntary geographic information system (VGIS) is proposed, identifying its core components (Project, Participants, Technology), then, crowdsourcing, the most relevant process for managing information within these type of systems, is analysed. We analyse several types of crowdsourcing models in the context of VGIS, and it is proposed a classification built around the different ways of organizing a community, which include different levels of participation according to the use of three processes: contributory, collaborative and participatory. Based on the study of the different typologies intrinsically linked to the existing levels of involvement and engagement, and the use of participants' cognitive skills, a continuum of participation is identified, presenting two opposite tendencies when designing VGI projects: crowd-based and community-driven, the latter with higher levels of collaboration or even co-creation. Based on the above, it is proposed a set of criteria for the design of the crowdsourcing strategy of a VGIS, as a roadmap that directs the project. This design and planning tool helps to characterize and define in a simple way the general requirements of the processes and activities of a VGIS that will be implemented through a crowdsourcing task, being the first step in the interdependent design of the project, participation and technological components. The design of subsequent strategies related to the other components of the system must be aligned and linked to the crowdsourcing strategy, and altogether will guide the development of tasks, functionalities and the specific technological tools of the system.http://dx.doi.org/10.4995/CIGeo2017.2017.6629

DOCUMENTACIÓN 3D DE LA COVA DELS CAVALLS Y DE SU ENTORNO (TÍRIG, CASTELLÓN)

Archaeological cultural heritage is a precious resource that should be transmitted to future generations. The 3D digital representation of monuments and sites has proven to be a reliable method for this aim. This article shows the geomatics workflow undertaken for the complex rock art documentation of the Cova dels Cavalls (Tírig, Castellón). The paintings are part of the Rock art of the Mediterranean Basin of the Iberian Peninsula declared a UNESCO’s World Heritage Site in 1998. The various stages are reviewed, from the acquisition phase up to the delivery of part of the derived metric products, such as 3D models and photorealistic models.http://dx.doi.org/10.4995/CIGeo2017.2017.6627

LA REPRESENTACIÓN GRÁFICA GEORREFERENCIADA ALTERNATIVA EN LA COORDINACIÓN CATASTRO-REGISTRO EN ESPAÑA. ESTUDIO DE LA IMPLANTACIÓN DE LA NORMA ISO-19152 (LADM) A NIVEL INTERNACIONAL

In Spain, the new Law 13/2015, dated June 24, modifying the Mortgage Law and the Cadastre Law in the search for its coordination, introduce the obligation to obtain georeferenced mapping and update the Cadastre in many cases. It is necessary to provide the graphic representation of the farms in case of: segregation, division, grouping and aggregation, and in the case of the operations of parceling, reparcelling, land consolidation, segregation, division, grouping or aggregation, forced expropriation or demarcation which determine a reordering of the land. It also requires the geographical delimitation of the area occupied by buildings declared within a farm. In all of these cases, if there is no coincidence of the farm in the field with the descriptive cadastral certification and the graphic of the farm, an alternative georeferenced graphical representation, duly accredited, is necessary, and where the adventurers are quoted to express or not their Conformity. This thesis aims to investigate an international level with the possibility of collaborating in the current developments, especially applying the ISO 19152 (On the Land Administration Domain Model) to the Spanish case and national level, applying the new Reforms of the Mortgage Law and the Cadastre Law. Performing geo-referenced graphical maps, in the cases in which the law forces it. To develop GIS software for the automation of information creation, as well as, the new formats creation used to Spanish Cadastre updating. The software will be tested in the real cases that will be performed.http://dx.doi.org/10.4995/CIGeo2017.2017.6592