An evolutionary approach to the delineation of functional areas based on travel-to-work flows

This paper presents a new approach to the delineation of local labor markets based on evolutionary computation. The aim of the exercise is the division of a given territory into functional regions based on travel-to-work flows. Such regions are defined so that a high degree of inter-regional separation and of intra-regional integration in both cases in terms of commuting flows is guaranteed. Additional requirements include the absence of overlap between delineated regions and the exhaustive coverage of the whole territory. The procedure is based on the maximization of a fitness function that measures aggregate intra-region interaction under constraints of inter-region separation and minimum size. In the experimentation stage, two variations of the fitness function are used, and the process is also applied as a final stage for the optimization of the results from one of the most successful existing methods, which are used by the British authorities for the delineation of travel-to-work areas (TTWAs). The empirical exercise is conducted using real data for a sufficiently large territory that is considered to be representative given the density and variety of travel-to-work patterns that it embraces. The paper includes the quantitative comparison with alternative traditional methods, the assessment of the performance of the set of operators which has been specifically designed to handle the regionalization problem and the evaluation of the convergence process. The robustness of the solutions, something crucial in a research and policy-making context, is also discussed in the paper.

Advances in camera trap data management tools: Towards collaborative development and integration with GIS

Camera traps have become a widely used technique for conducting biological inventories, generating a large number of database records of great interest. The main aim of this paper is to describe a new free and open source software (FOSS), developed to facilitate the management of camera-trapped data which originated from a protected Mediterranean area (SE Spain). In the last decade, some other useful alternatives have been proposed, but ours focuses especially on a collaborative undertaking and on the importance of spatial information underpinning common camera trap studies. This FOSS application, namely, “Camera Trap Manager” (CTM), has been designed to expedite the processing of pictures on the .NET platform. CTM has a very intuitive user interface, automatic extraction of some image metadata (date, time, moon phase, location, temperature, atmospheric pressure, among others), analytical (Geographical Information Systems, statistics, charts, among others), and reporting capabilities (ESRI Shapefiles, Microsoft Excel Spreadsheets, PDF reports, among others). Using this application, we have achieved a very simple management, fast analysis, and a significant reduction of costs. While we were able to classify an average of 55 pictures per hour manually, CTM has made it possible to process over 1000 photographs per hour, consequently retrieving a greater amount of data.

La sostenibilidad en la planificación territorial de escala regional en España: estudio de casos

En las dos últimas décadas, la expresión «desarrollo territorial sostenible» se ha incorporado con éxito en los documentos de ordenación del territorio, hasta convertirse en un principio rector principal. El objetivo de este artículo es analizar la incorporación de los principios de sostenibilidad en la planificación territorial española, valorando los resultados prácticos que ello ha significado. Se ha realizado un análisis de las leyes y planes de ordenación del territorio de escala regional, destacando en cuatro casos de estudio (País Vasco, Navarra, Andalucía y Comunidad Valenciana) por la relevancia que este principio rector ha cobrado en sus procesos de planificación territorial. Se ha completado la información con la realización de entrevistas a actores clave de la ordenación del territorio en esos espacios regionales. Los resultados muestran que, a pesar de las buenas intenciones que incluyen los textos de leyes y planes, por lo común, el proceso de integración de la sostenibilidad a la planificación territorial de escala regional es lento y sus efectos prácticos todavía son escasamente visibles.