Papers by Miguel Ángel Latre
The aim of this research is to provide a simple way of monitoring water quality in a set of reser... more The aim of this research is to provide a simple way of monitoring water quality in a set of reservoirs using an earth observation based approach. The study carried out was preformed in forty two reservoirs of the Ebro basin. The proposed methodology is based on the development of an algorithm for the estimation of water quality by means of the Landsat 5 TM bands reflectance. Some band ratios were utilized in the model as well. Trophic State Index (TSI), calculated by means of Secchi Disc Transparency data, was estimated using a forward stepwise multiple regression analysis. A great correlation degree for the TSI values prediction was obtained. The best prediction of the dependent variable was explained by the independent variables TM2 band and TM1/TM2 ratio. The final results showed a highly spatial heterogeneity of water quality among reservoirs along the study area. Moreover, an important spatial heterogeneity was also observed in the water bodies.
Advances in Giscience, 2009
The general concern about environmental issues has involved the creation of national and internat... more The general concern about environmental issues has involved the creation of national and international policies that require, at a technical level, the analysis, merging and processing of data obtained from very different sources. This paper proposes an approach for the integration of hydrological data that is based on the use of a multilingual ontology to facilitate the mapping across the local data models in the different sources. The novelty of the proposal is that the multilingual domain ontology is generated automatically by the merging and pruning of existing lexical ontologies. This approach has been tested in the context of the European Water Framework directive for the development of reporting applications in cross-border scenarios. Nevertheless, this approach could be easily extended to other domains.
Data & Knowledge Engineering, 2012
ABSTRACT Metadata are a key element for the development of information infrastructures because th... more ABSTRACT Metadata are a key element for the development of information infrastructures because they facilitate the semantic description of contents and services. However, the diversity and heterogeneity of metadata standards have become a barrier for the generation of these metadata. Many metadata editors are not useful anymore because they do not support the latest version of metadata standards or the new profiles arisen in the market. Thus, this work proposes a model driven approach for the development of metadata editors, more focused on the generic treatment of metadata models than on the development of specific edition forms for a reduced set of metadata standards. This approach has been tested in the context of Spatial Data Infrastructures for the development of an Open Source tool called CatMDEdit. Additionally, the approach could be also applied to improve the efficiency of any metadata editor using a metamodeling development strategy.
Nowadays, there is no problem in accessing to geocoding providers but in choosing the proper one.... more Nowadays, there is no problem in accessing to geocoding providers but in choosing the proper one. The application requirements determine the selection of the service in a context where the user needs an answer and is not often interested in knowing where to find the right information. This paper presents an architectural approach for compound geocoding Web services built above diverse Web Services with spatial content, especially gazetteer and geocoding services. The diversity in scenarios of geocoding usage requires an adaptive geocoding service. The proposed architecture satisfies this user requirement.
ABSTRACT Metadata are a key element for the development of information infrastructures because th... more ABSTRACT Metadata are a key element for the development of information infrastructures because they facilitate the semantic description of contents and services. However, the diversity and heterogeneity of metadata standards have become a barrier for the generation of these metadata. Many metadata editors are not useful anymore because they do not support the latest version of metadata standards or the new profiles arisen in the market. Thus, this work proposes a model driven approach for the development of metadata editors, more focused on the generic treatment of metadata models than on the development of specific edition forms for a reduced set of metadata standards. This approach has been tested in the context of Spatial Data Infrastructures for the development of an Open Source tool called CatMDEdit. Additionally, the approach could be also applied to improve the efficiency of any metadata editor using a metamodeling development strategy.
Nowadays, there is no problem in accessing to geocoding providers but in choosing the proper one.... more Nowadays, there is no problem in accessing to geocoding providers but in choosing the proper one. The application requirements determine the selection of the service in a context where the user needs an answer and is not often interested in knowing where to find the right information.
Environmental Science & Technology, 2014
Environmental Modelling & Software, 2013
ABSTRACT Environment-related authorisations are a relevant issue for environmental management. Th... more ABSTRACT Environment-related authorisations are a relevant issue for environmental management. They require a considerable effort by the authorities, and this might result in substantial delays for the citizens. Implementing those authorisation processes by means of e-government services would improve efficiency and, consequently, citizen satisfaction. Environment-related authorisations usually require a variety of geospatial information, and have to deal with administrative areas which do not match physical and ecological ones. They also have to integrate heterogeneous information in different formats, data models and languages, and provided by distinct organisations, even from different countries. This paper discusses how Spatial Data Infrastructures (SDIs) can deal with these problems in the environmental domain, while improving the level of service provision in terms of e-government applications. This is even more relevant within the European Union where there is a legal mandate to establish an SDI to support environmental policies and activities with an impact on the environment. As a proof-of-concept, an application to request and manage water abstraction authorisations, based on an SDI, is demonstrated. This application is part of SDIGER, a cross-border inter-administration SDI to support the water framework directive information access for the Adour-Garonne and Ebro River basins, that was a pilot project for the EU INSPIRE Directive. The introduction of this transactional e-government service modifies the administrative process of granting authorisations: it allows to re-use the effort in data capture made by the applicants in their requests, facilitates the submission of more feasible applications and reduces the workload of the office staff.
This paper presents a Java approach to develop a geologic-mining information system. User require... more This paper presents a Java approach to develop a geologic-mining information system. User requirements address system features such as GIS visualization and modification, interoperation with tabular data, distributed concurrent access to read and modify GIS data still maintaining, and support for internet browsers. The paper shows the advantages of using Java as the programming language for development and its low cost compared with the use of other commercial approaches. A first version of the system is now in operational use by the regional administration.
In this paper a fleet tracking and monitoring system enabled to Internet is presented. For this k... more In this paper a fleet tracking and monitoring system enabled to Internet is presented. For this kind of systems, it is necessary to integrate different technologies to offer the required basic functionality (wireless communication, GPS, GIS,…). These technologies enable the acquisition of vehicle locations in real time and the visualization of vehicles in a map. The need to optimize service
The Water Framework Directive requires the European Commission to be provided with certain geogra... more The Water Framework Directive requires the European Commission to be provided with certain geographic information in the form of maps. The working group in GIS (GIS-GW) was formed to provide common guidance in implementing the GIS elements, presenting a set of best practices that taken to their full extent should led to the creation of an SDI that addresses the GIS requirements of the WFS, according also with the INSPIRE initiative principles and objectives.
Resumen: En este trabajo se aborda el problema de visualizar grandes repositorios de imágenes de ... more Resumen: En este trabajo se aborda el problema de visualizar grandes repositorios de imágenes de satélite a través de una red, ya sea una intranet o Internet. Los problemas vienen dados por las limitaciones a la velocidad de transferencia de datos impuestas por la red, lo que conlleva importantes limitaciones al tamaño de la información a transmitir. Este artículo presenta una aproximación (asequible tecnológicamente y libre formatos propietarios y licencias) desarrollada en Java y basada en estándares que hace viable el acceso interactivo, con las herramientas básicas de un sistema de visualización de información geográfica, a este tipo de grandes repositorios así como la integración de coberturas vectoriales con éstas. La viabilidad de la aproximación propuesta queda demostrada con un ejemplo de implantación en la Confederación Hidrográfica del Ebro para el acceso a las ortoimágenes de la cuenca del Ebro.
The EuroGEOSS project is a large scale integrated project that demonstrates the added value of ma... more The EuroGEOSS project is a large scale integrated project that demonstrates the added value of making existing systems and applications in three strategic areas interoperable within the GEOSS and INSPIRE frameworks. This work is focused on the discovery of drought-related resources in the strategic area of drought. For the purpose of facilitating the annotation and discovery of drought related resources, the project partners involved in this area created an initial operating infrastructure with the following components: - Customization of the CatMDEdit metadata edition tool for the annotation of services and datasets according to INSPIRE metadata implementing rules and ISO 19115, including the automatic annotation of OGC services, and the two common vocabularies agreed for multidisciplinary interoperability in the project: GEMET and GEOSS Societal Benefit Areas. - Deployment of a metadata catalogue compliant with the OGC specification and its ISO 19115/19119 profile. - Development o...
The research goal of the drought strategic area within the context of the EuroGEOSS project is to... more The research goal of the drought strategic area within the context of the EuroGEOSS project is to evaluate the feasibility of integrating local, national and multinational drought monitoring systems in Europe as a European contribution to a Global Drought Monitoring System.
Lecture Notes in Geoinformation and Cartography, 2014
ABSTRACT The implementation of the INSPIRE directive requires to check the conformity of a large ... more ABSTRACT The implementation of the INSPIRE directive requires to check the conformity of a large number of network services with the implementing rules of INSPIRE. The evaluation whether a service is fully conformant with INSPIRE is complex and requires the use of specialized testing tools that should report how verification has been made and should identify non-conformances. The use of these tools requires a high degree of technical knowledge. This fact makes very difficult for non-technical stakeholders (end users, managers, domain experts, etc.) to participate effectively in conformance testing, hinders stakeholders understanding of the causes and consequences of non-conformant results and may cause in some stakeholders disinterest in conformance testing. This work explores the suitability of a behaviour-driven development (BDD) approach to the conformance testing of OGC Web services in the context of the INSPIRE directive. BDD emphasizes the participation of non-technical parties in the design of acceptance tests by means of automatable abstract tests expressed in a human readable format. Using this idea as base, this work describes a BDD based workflow to derive abstract test suites and executable test suites from INSPIRE implementation requirements that can be written in the language used by non-technical stakeholders. This work also analyses if BDD and popular BDD tools, such as Gherkin and Cucumber, are compatible with ISO 19105:2000 testing methodology. As demonstration, we present an online conformance tool for INSPIRE View and Discovery services that executes BDD test suites.
In this paper a fleet tracking and monitoring system enabled to Internet is presented. For this k... more In this paper a fleet tracking and monitoring system enabled to Internet is presented. For this kind of systems, it is necessary to integrate different technologies to offer the required basic functionality (wireless communication, GPS, GIS,…). These technologies enable the acquisition of vehicle locations in real time and the visualization of vehicles in a map. The need to optimize service
Lecture Notes in Computer Science, 2004
The growing importance of eGoverment is putting pressure on authorities to provide services onlin... more The growing importance of eGoverment is putting pressure on authorities to provide services online and accessible to the citizen. In order to satisfy this necessity, Goverments have to develop high-cost infrastructures in a short period of time and with a diffuse specifications of the objectives and services. In the other hand, there are a large set of initiatives that have been launched for the development of spatial data infrastructures. This kind of infrastructures are the basic tool for optimizing the management of geographic information because its amount and complexity. Most of these initiatives are being promoted and sponsored by public administrations because geographic information is a basic resource for their operative work. This paper proposes the development of eGoverment infrastructures over the spatial data infrastructures launched, viewing them as the providers of the first version of the eGoverment services.
Lecture Notes in Computer Science, 2010
In the last years, there has been a huge increment in the number of e-government services offered... more In the last years, there has been a huge increment in the number of e-government services offered to the citizens and companies. However, environment-related permits are among the least developed kind of e-government services in Europe. Environmental management and government requires the use of geographic information and spatial data infrastructures (SDIs) are being providing the framework for optimizing its management, and they are becoming a legal obligation for some countries and institutions. In order to make profit of geographic information technologies and of the obligation of building SDIs to contribute to the development of egovernment services, this paper analyzes an e-government opportunity in the environmental management linked to the use of SDIs and presents how to use them in a real tool: the application for a water abstraction authorization. SDI services are used for the capture, management, and assess of geographical information in a full transactional level e-government service.
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Papers by Miguel Ángel Latre