GIS-based debris flow source and runout susceptibility assessment from DEM data - a case study in NW Nicaragua

In October 1998, Hurricane Mitch triggered numerous landslides (mainly debris flows) in Honduras and Nicaragua, resulting in a high death toll and in considerable damage to property. The potential application of relatively simple and affordable spatial prediction models for landslide hazard mapping in developing countries was studied. Our attention was focused on a region in NW Nicaragua, one of the most severely hit places during the Mitch event. A landslide map was obtained at 1:10 000 scale in a Geographic Information System (GIS) environment from the interpretation of aerial photographs and detailed field work. In this map the terrain failure zones were distinguished from the areas within the reach of the mobilized materials. A Digital Elevation Model (DEM) with 20 m×20 m of pixel size was also employed in the study area. A comparative analysis of the terrain failures caused by Hurricane Mitch and a selection of 4 terrain factors extracted from the DEM which, contributed to the terrain instability, was carried out. Land propensity to failure was determined with the aid of a bivariate analysis and GIS tools in a terrain failure susceptibility map. In order to estimate the areas that could be affected by the path or deposition of the mobilized materials, we considered the fact that under intense rainfall events debris flows tend to travel long distances following the maximum slope and merging with the drainage network. Using the TauDEM extension for ArcGIS software we generated automatically flow lines following the maximum slope in the DEM starting from the areas prone to failure in the terrain failure susceptibility map. The areas crossed by the flow lines from each terrain failure susceptibility class correspond to the runout susceptibility classes represented in a runout susceptibility map. The study of terrain failure and runout susceptibility enabled us to obtain a spatial prediction for landslides, which could contribute to landslide risk mitigation.

Guia d’Internet (HTML5 i reproductors web)

Aquest document dóna les pautes bàsiques per poder incorporar vídeos incrustats en una pàgina web codificada en HTML5, amb un reproductor accessible. Així mateix, es dóna una introducció a l’eina ccPlayer, reproductor de vídeos que està implementat com un objecte SWF Flash i que permet l’addició de subtítols. Veurem també una altra eina similar, el JWPlayer.

Guía de Internet (HTML5 y reproductores web)

Este documento da las pautas básicas para incorporar vídeos incrustados en una página web codificada con HTML5, con un reproductor accesible. Así mismo, se da una introducción a la herramienta ccPlayer, reproductor de vídeos que está implementado como objeto SWF Flash y que permite añadir subtítulos. También para la herramienta JWPlayer que permite añadir subtítulos y audiodescripción.

Regional deterministic characterization of fracture networks and its application to GIS-based rock fall risk assessment

The study investigates the possibility to incorporate fracture intensity and block geometry as spatially continuous parameters in GIS-based systems. For this purpose, a deterministic method has been implemented to estimate block size (Bloc3D) and joint frequency (COLTOP). In addition to measuring the block size, the Bloc3D Method provides a 3D representation of the shape of individual blocks. These two methods were applied using field measurements (joint set orientation and spacing) performed over a large field area, in the Swiss Alps. This area is characterized by a complex geology, a number of different rock masses and varying degrees of metamorphism. The spatial variability of the parameters was evaluated with regard to lithology and major faults. A model incorporating these measurements and observations into a GIS system to assess the risk associated with rock falls is proposed. The analysis concludes with a discussion on the feasibility of such an application in regularly and irregularly jointed rock masses, with persistent and impersistent discontinuities.

Programación de aplicaciones móviles usando HTML5

Desarrollo de una aplicación social para móviles utilizando HTML5.

Mi lista : Aplicación móvil utilizando HTML5, CSS3 y JavaScript

La aplicación 'Mi lista', desarrollada para Android utilizando HTML5, CSS3 y JavaScript, pretende facilitar la tarea de realizar la lista de la compra en función de un menú semanal escogido por el usuario.

Preguntes i respostes - Play Q&A : Programació d'aplicacions per a dispositius mòbils usant HTML5

Desenvolupament d'una aplicació per a estudiants on poden practicar els coneixements adquirits a les seves assignatures amb un joc de preguntes i respostes.

Desarrollo de una aplicación web multiplataforma según el patrón Modelo Vista Controlador

Memoria del desarrollo de una aplicación web siguiendo el patrón de diseño Modelo Vista Controlador, desde la planificación a la implementación. Tecnologías utilizadas: MySQL, Java2EE, HTML5, Struts2, jQuery, jQueryMobile, JSP, ESAPI, Jasypt, XML.

Comptador de clics en HTML5 : The Clicker Master

Desenvolupament d'una aplicació per a dispositius mòbils usant tecnologies HTML5. Es tracta d'un comptador de clics anomenat 'The Clicker Master'.

Personalized touristic routes implementing semantic web on GIS

Nowadays, when a user is planning a touristic route is very difficult to find out which are the best places to visit. The user has to choose considering his/her preferences due to the great quantity of information it is possible to find in the web and taking into account it is necessary to do a selection, within small time because there is a limited time to do a trip. In Itiner@ project, we aim to implement Semantic Web technology combined with Geographic Information Systems in order to offer personalized touristic routes around a region based on user preferences and time situation. Using ontologies it is possible to link, structure, share data and obtain the result more suitable for user's preferences and actual situation with less time and more precisely than without ontologies. To achieve these objectives we propose a web page combining a GIS server and a touristic ontology. As a step further, we also study how to extend this technology on mobile devices due to the raising interest and technological progress of these devices and location-based services, which allows the user to have all the route information on the hand when he/she does a touristic trip. We design a little application in order to apply the combination of GIS and Semantic Web in a mobile device.

GIS-Based Accident Location and Analysis System (GIS-ALAS) Project Report: Phase 1, 1998

This report summarizes progress made in Phase 1 of the GIS-based Accident Location and Analysis System (GIS-ALAS) project. The GIS-ALAS project builds on several longstanding efforts by the Iowa Department of Transportation (DOT), law enforcement agencies, Iowa State University, and several other entities to create a locationally-referenced highway accident database for Iowa. Most notable of these efforts is the Iowa DOT’s development of a PC-based accident location and analysis system (PC-ALAS), a system that has been well received by users since it was introduced in 1989. With its pull-down menu structure, PC-ALAS is more portable and user-friendly than its mainframe predecessor. Users can obtain accident statistics for locations during specified time periods. Searches may be refined to identify accidents of specific types or involving drivers with certain characteristics. Output can be viewed on a computer screen, sent to a file, or printed using pre-defined formats.