Jesus Palomar

• Polytechnic University of Valencia

This study explores the potential of repurposing historical aerial photographs to produce high-accuracy digital surface models (DSMs) at regional scales. A novel methodology is introduced, incorporating road points for quality control and refinement to enhance the precision and comparability of multitemporal DSMs. The method consists of two phases....

High costs and project-based (short-term) financing mean that coastal engineering projects are often undertaken in the absence of appropriate post-construction monitoring programmes. Consequently, the performance of shoreline-stabilizing structures or beach nourishments cannot be properly quantified. Given the high value of beaches and the increase...

La quantificació dels canvis volumètrics en els sistemes de platja i duna és essencial per a realitzar balanços sedimentaris en les cèl·lules sedimentàries costaneres i comprendre completament l’evolució de les platges. Ací s’examina el potencial de les sèries de fotografies aèries, originalment utilitzades per a crear ortofotos, en la monitoratge...

La cuantificación de los cambios volumétricos en los sistemas de playa y duna es esencial para comprender en profundidad los procesos de desplazamiento del sedimento y la evolución de las playas. Las técnicas de fotogrametría actuales permiten obtener Modelos Digitales de Superficie a partir de fotografías aéreas con precisiones comparables a los v...

Las playas de Orpesa (Castellón) enfrentan graves problemas de erosión debido a un déficit sedimentario, agravado por temporales costeros como el temporal Gloria de 2020. Este estudio analiza cuatro playas de Orpesa utilizando 993 líneas de costa extraídas de imágenes de satélite entre 1984 y 2023. Se crearon Modelos Espacio-Temporales (MET) para e...

Este estudio evalúa la interoperabilidad espaciotemporal de los modelos batimétricos derivados de imágenes satelitales Sentinel-2, centrado en la playa del Saler (2024) y las áreas costeras de Sagunt y Canet d’En Berenguer (2020). Los resultados demuestran que el uso de composiciones temporales de mediana para el procesamiento de imágenes mejora la...

Sandy coastlines are very dynamic spaces affected by a variety of natural and human factors. In Central Chile, changes in oceanographic and wave conditions, modes of inter-annual climate variability such as El Niño Southern Oscillation (ENSO), and extreme events such as earthquakes and tsunamis condition the beach morphology. At the same time, dire...

The definition of the shoreline position from satellite imagery is of great interest among coastal monitoring techniques. Understanding the reality mapped by the resulting shorelines and defining their accuracy is of paramount importance. The assessment described in this paper constitutes a validation of the shorelines obtained by using the novel t...

Storms and extremely energetic events may significantly impact the form and structure of beaches, and so cause erosive processes and coastal damages. Efficient management actions require an up-to-date and accurate knowledge of beach morphological changes, with the shoreline position being a good indicator of such changes. This work proposes the use...

The accuracy and robustness of the shoreline definition from satellite imagery on different coastal types are crucial to adequately characterising beach morphology and dynamics. However, the generic and widespread application of satellite-derived shoreline algorithms is limited by the lack of robust methods and parameter assessments. This work cons...

Satellite remote sensing is becoming a widely used monitoring technique in coastal sciences. Yet, no benchmarking studies exist that compare the performance of popular satellite-derived shoreline mapping algorithms against standardized sets of inputs and validation data. Here we present a new benchmarking framework to evaluate the accuracy of shore...

Satellite remote sensing is becoming a widely used monitoring technique in coastal sciences. Yet, no benchmarking studies exist that compare the performance of popular satellite-derived shoreline (SDS) mapping algorithms against standardized sets of inputs and validation data. Here we present a new benchmarking framework to evaluate the accuracy of...

SAET (Shoreline Analysis and Extraction Tool) is a novel open-source tool to enable the completely automatic detection of shoreline position changes using the optical imagery acquired by the Sentinel-2 and Landsat 8 and 9 satellites. SAET has been developed within the ECFAS (European Coastal Flood Awareness System) project, which is intended to be...

Lakes with strong variations in their water coverage may act as indicators of different natural phenomena. Recent techniques for the extraction of Satellite-Derived Shorelines (SDSs) with subpixel accuracy are potentially useful for accurate and continuous monitoring of the limits of water bodies along large periods. This work proposes a method for...

Las playas son espacios de suma importancia ecosistémica y socioeconómica, en numerosas ocasiones amenazados por procesos erosivos que ponen en riesgo su sostenibilidad. Este es el caso de la costa valenciana, en la que las acciones humanas juegan un papel esencial al alterar la disponibilidad y distribución del sedimento a lo largo de la costa. La...

We present ten years of satellite-derived shorelines at high-energy beaches in the Aveiro region (Portugal) that have simultaneously been accurately monitored in situ. Here we examine the alongshore seasonal dynamics during the last decade. This research applies the SHOREX system for defining the shoreline position from free mid-resolution Landsat-...

Este trabajo analiza el impacto del temporal Gloria sobre un segmento de 9 km de longitud de las playas y dunas de la Devesa del Saler (València), y la forma en que se inició el proceso de recuperación de las mismas. Se han comparado cuatro series de datos tridimensionales adquiridos tanto antes como después del temporal. Tres de ellas proceden de...

Beaches are spaces of paramount importance for coastal societies currently threatened by coastal erosion. Their preservation requires accurate quantification of their changes in order to understand their behavior and to propose efficient solutions. Landsat 8 and Sentinel 2 mid-resolution satellites offer free-of-charge images with great potential f...

Gallocanta is the largest well-preserved saline lake in Western Europe, included in the Ramsar List. Associated with its shallow morphology, the lake undergoes strong variations in its water surface extent along time that condition the habitat distribution and the ecological functions. Data on the morphology of the lake and its hydrological variati...

Beaches are extremely dynamic natural environments that experience significant variations at different spatial and temporal scales. The processes of appearance and maintenance of morphological features as the beach mesoforms, as well as their characterization, may provide useful information on the morphodynamic evolution of a beach and the spatial...

SAET (Shoreline Analysis and Extraction Tool) is a tool intended to enable the automatic detection and quantification of the changes experienced by the shoreline position on beaches affected by coastal storms. It is an open-source tool developed within the framework of the ECFAS project which aims to demonstrate the technical and operational feasib...

Coastal storms constitute a key factor controlling shoreline position changes. They may deeply modify the beach morphology and contribute to erosive processes. Earth observation data as the images from the Sentinel satellites of ESA's Copernicus program and the Copernicus Contributing Missions offer potential information for characterizing beach ch...

Coastal erosion on the sandy coastline of Chile constitutes a problem due to natural phenomena and has turned worse by anthropic actions. We studied 22 beaches with more than 120 satellite images of 30 m (Landsat 5, 7 and 8) and 20 m (Sentinel 2) spatial resolution, between 1984 to 2021, to correlate the interannual shoreline changes deduced from s...

Resum: Les platges i les dunes són espais naturals de gran valor ecosistèmic i socioeconòmic amenaçats tant per l'acció humana directa com per les conseqüències del canvi climàtic. Donada la seua importància per a les societats costaneres, caracteritzar la seua morfologia i comprendre els seus canvis al llarg del temps suposen una fita necessària p...

Sediment grain size is a fundamental parameter conditioning beach-face morphology and shoreline changes. From remote sensing data, an efficient definition of the shoreline position as the water–land interface may allow studying the geomorphological characteristics of the beaches. In this work, shoreline variability is defined by extracting a set of...

Las áreas costeras de la región de Valparaíso de Chile por sus características oceanográficas, climáticas y ecológicasson de gran importancia para el desarrollo turístico, económico y ambiental del país. Las costas de la región se han vistoafectadas por eventos extremos desde 2015, con marejadas recurrentes que han aumentado respecto a años anterio...

Air pollution in urban environments is a serious problem affecting human health and the environment. A wide range of tools are needed to identify air pollution problems and to test the effectiveness of any air quality action plan. This document describes a new decision support system for linking existing air quality tools through a modular methodol...

Cabezas-Rabadán, C.; Pardo-Pascual, J.E.; Palomar-Vázquez, J.; Ferreira, Ó., and Costas, S., 2020. Satellite Derived Shorelines at an exposed meso-tidal beach. In: Malvárez, G. and Navas, F. (eds.), Global Coastal Issues of 2020. Journal of Coastal Research, Special Issue No. 95, pp. 1027–1031. Coconut Creek (Florida), ISSN 0749-0208. Shoreline pos...

Air pollution is a serious global problem that threatens human life and health, as well as the environment. The most important aspect of a successful air quality management strategy is the measurement analysis, air quality forecasting, and reporting system. A complete insight, an accurate prediction, and a rapid response may provide valuable inform...

Los datos sobre la posición de la línea de costa resultan de gran interés para estudiar el dinamismo costero y los cambios en la morfología de las playas. El sur del golfo de Valencia es un segmento costero compuesto por amplias playas arenosas que en las últimas décadas se enfrentan a importantes problemas erosivos. El sector está condicionado por...

Se presenta una monitorización de los cambios en la superficie de la lámina y del volumen de agua almacenado en la Laguna de Gallocanta durante cuatro meses (del 15 de junio al 21 de octubre de 2018) mediante la extracción de las líneas de orilla empleando el sistema SHOREX. Éste fue calibrado tomando como referencia un tramo de la orilla definido...

Shoreline position can be efficiently extracted with subpixel accuracy from mid-resolution satellite imagery using tools as SHOREX. However, it is necessary to develop procedures for deriving descriptors of the beach morphology and its changes in order to become truly useful data for characterizing the coastal dynamism. A new approach is proposed...

La monitorización a gran escala y de forma continua de los cambios morfológicos en playas presenta un gran interés para la gestión costera. La posición de la línea de costa ha sido definida en tres playas del golfo de Valencia en múltiples fechas durante el periodo 1984-2014 partiendo de las imágenes Landsat 5, 7 y 8 y el sistema para la extracción...

This work presents a coastal monitoring project using remote sensing and photogrammetry to obtain accurate information of beaches and characterize evolutionary trends along the coast of Chile. The acquisition of multiple shorelines on a large temporal and spatial scale from free mid-resolution (30 m/pixel) satellite images with SHOREX system expect...

The estimation of exposure to PM 10 and PM 2.5 requires the knowledge of surface concentration at high temporal and spatial resolutions. In this paper, the relation between PM 10 and PM 2.5 ground data and MODIS AOD satellite data has been evaluated to determine the concentration of particulate matter in Valencia, Spain. This was done using data fr...

Continuous large-scale monitoring of the morphological changes on beaches would be extremely useful for coastal management. On three beaches in the Gulf of Valencia, shoreline positions have been defined from Landsat 5, 7 and 8 available images along the period 1984-2014 using SHOREX. This large amount of data has been employed to analyse the evolu...

Las dunas costeras son elementos morfológicos sumamente dinámicos por lo que reconocer y cuantificar sus cambios ayuda a diagnosticar el estado en que se encuentra el sistema playa-duna. Dado que esos cambios no son siempre evidentes, sobre todo cuando se analizan sobre lapsos temporales cortos, se requieren métodos precisos para poder reconocerlos...

En este trabajo se presenta SHOREX, una metodología para la extracción automatizada de líneas de costa a partir de imágenes satélite, tanto Landsat-8 como Sentinel-2, con precisión sub-pixel. SHOREX ha sido diseñado como un conjunto de herramientas desarrolladas en Python con el objetivo de ser utilizado no solamente en entornos de investigación, s...

La teledetección aplicada al estudio de la calidad de aire ha aportado nuevas herramientas para la evaluación de la distribución espacial y temporal de los contaminantes atmosféricos. Uno de los principales parámetros satelitales empleados es la densidad óptica de aerosoles (AOD), que permite cuantificar la atenuación de la radiación solar en prese...

This paper evaluates the accuracy of shoreline positions obtained from the infrared (IR) bands of Landsat 7, Landsat 8, and Sentinel-2 imagery on natural beaches. A workflow for sub-pixel shoreline extraction, already tested on seawalls, is used. The present work analyzes the behavior of that workflow and resultant shorelines on a micro-tidal ( < 2...

Geomatics includes techniques such as photogrammetry, remote sensing and geographic information systems, which provide applicable tools in various areas of biomedicine, for example skin ulcer measurement. In previous projects we developed procedures for acquiring data and measuring skin ulcers using a digital photo camera, a manual scanner and phot...

In recent years, heritage documentation processes have largely benefited from the application of both 2D imagery analysis and 3D techniques for recording and visualization of assets. In this paper, a combined 2D-3D methodological workflow, especially helpful for the documentation of graffiti on closed and narrow spaces, is presented. It is proposed...

p>For whatever project related with the study and conservation of cultural heritage, the dissemination stage of tree-dimensional (3D) information must be a key part of the whole process. Most of the existing web-based platforms are using WebGL technology to disseminate 3D content through Web navigators, despite they are normally generic, with a low...

The shoreline is a useful indicator of mid-term coastal evolution. Every shoreline is affected by instantaneous sea-level, the length of the run-up, and beach profile changes. In this work, annual mean shorelines are evaluated in a manner that avoids these effects by averaging the instantaneous shoreline positions registered during the same year. A...

This paper presents techniques for the automated generalization of categorical data using ArcObjects (ArcGIS) as programming development framework. The dataset is a gapless polygonal land-use mosaic from the region of Valencia and was derived from multispectral airborne image classification and combined with the municipal cadastre so that the level...

The impact of storms on sandy beaches and the subsequent recovery process is described from an analysis of the shoreline positions obtained from Landsat 5 TM and Landsat 7 ETM + imagery. Shoreline extraction is based on an algorithm previously proposed by the authors that enables a positioning accuracy of 5 m root mean square error (RMSE). The impa...

Urban spatial structures reflect local particularities produced during the development of a city. High spatial resolution imagery and LiDAR data are currently used to derive numerical attributes to describe in detail intra-urban structures and morphologies. Urban block boundaries have been frequently used to define the units for extracting metrics...

The Manning formula is one of the most used to calculate the average velocity of water flow in ungauged channels. In order to be applied, it is necessary to measure in field the hydraulic radius (RH), the slope of the water surface (S), and to obtain the roughness coefficient (n), usually through tables created for this purpose. This involves a...

A plot-based approach is proposed to detect fruit trees from high spatial resolution aerial images and extract tree and plot-based parameters, such as fraction of tree cover, number of trees, and planting patterns. Each plot image, defined by the boundaries or polygons obtained from a cadastral database, is analyzed independently. The methodology i...

n this article, a technique towards the generation of hybrid raster-attributes map for use in mobile devices is described. Our solution is based on coding the map attributes within an image using RGB values. The designed coding method enables the simultaneous storage of discrete thematic attributes and continuous quantitative attributes. This appro...

This article introduces a method and tool which allow for the automatic generalisation of topographic map spot heights. This is based on two premises: (1) the points remaining on the map should be the most relevant, and (2) their distribution over the map is the most suitable. The relevance of each point is determined by its position in (or near) a...

PARDO-PASCUAL, J.E. , GARCÍA-ASENJO, L., PALOMAR-VÁZQUEZ, J. and GARRIGUES-TALENS, P., 2005. New Methods and Tools to analyze the beach-dune system evolution using Real Time Kinematic Global Positioning System and Geographic Information Systems, Journal of Coastal Research, SI 49 (Proceedings of the 2 nd Meeting in Marine Sciences), 34 – 39. Valenc...

This article describes a methodology that takes advantage of the potential of the data management, attributes and spatial relationships of geographic information systems (GIS) for the automatization of one of the most complex cartographic tasks: the process of generalization. The methodology is designed to be applied to thematic recreational maps,...

En este artículo se describe una metodología que permite construir y almacenar las relaciones topológicas que se dan dentro de una red de polilíneas entre sus elementos básicos (nodos y arcos), como son las relaciones de conectividad y adyacencia. El objetivo es por tanto conseguir la construcción de polígonos a partir de una red de polilíneas que...

The paper will explain the implementation of the generalization application to select spot heights, developed by the Escola Tècnica Superior d'Enginyeria Geodèsica, Cartogràfica i Topogràfica of the Universitat Politècnica de València (UPV), in the production workflow on the Institut Cartogràfic de Catalunya (ICC) to derive the Topographic Database...

Una de las grandes aplicaciones actuales de los sistemas de información geográfica es todo lo relacionado con el medio ambiente. En este artículo se pretende recoger las iniciativas que el Área de Medio Ambiente de la Diputación Provincial de Valencia ha venido realizando en los últimos dos años, en cuanto al análisis y la gestión de diferentes pro...

En la generación de cartografía un proceso muy común es la generalización cartográfica, consistente normalmente en reducir la escala de un mapa base y adaptar sus elementos a la nueva escala y/u objetivos del mapa. Tras la reducción de escala, el espacio que deben compartir las curvas de nivel es menor, y por lo tanto, se producen aglomeraciones vi...