Abstract
The concept of proximity in planning requires the attention of scholars and decision-makers to the issue of accessibility to services within a walking distance, as part of the more general effort to make cities more resilient, sustainable, and healthy. From an operational side, rethinking cities according to the paradigm of proximity and accessibility to services on foot implies the need for time-based methodologies that can identify the areas that can be reached within a given time interval. These methodologies often use GIS network analy-sis tools, but can require long analysis times and high financial costs for software. This contribution proposes an indicator of walking accessibility to facilities that is simple, quick to compute, and built using free and open-source tools such as QGIS and Openrouteservice, in order to allow its broad replicability on different contexts. The indicator was successfully tested in the city of Novara, Italy, using the 5-, 10- and 15-min isochrones, identifying the areas from which all the selected facilities can be reached within this time interval.
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Acknowledgements
The author would like to thank Dr. Guglielmo Ricciardi of the Euro-Mediterranean Centre on Climate Change for his valuable comments and the association GFOSS.IT APS, the Italian OSGeo local chapter, for their commitment to opensource software.
Also, the author would like to thank the Openrouteservice staff for their availability and support in solving issues concerning the use and deploy of the software, and Syntaxbyte for the clear explanations concerning the set-up procedure via Docker.
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Appendix A. Openrouteservice Deployment on Windows
Appendix A. Openrouteservice Deployment on Windows
Openrouteservice (ORS) is maintained by the GIScience Research Group of the Department of Geography at the University of Heidelberg [27], and offers opensource routing services built on OpenStreetMap (ORS), OpenAddresses, GeoNames and Who's On First data. ORS can be used via maps.openrouteservice.org, requesting a personal API key or configuring a localhost Tomcat server via Docker, allowing to avoid any use restriction. Docker, Git and WSL are required.
ORS GitHub repository can be cloned from command line with git clone https://github.com/GIScience/openrouteservice. To build the container in openrouteservice folder these subfolders should be created: mkdir -p conf elevation_cache graphs logs/ors logs/tomcat. The container can be generated with docker compose up, and is it possible to check the installation at http://localhost:8080/. Default geographical data can be changed cleaning the old data in folders elevation_cache, data e graphs, downloading the required.pbf (e.g. from http://download.geofabrik.de/) and modifying some settings in docker-compose.yml file, decommenting line # -./your_osm.pbf:/ors-core/data/osm_file.pbf and replacing with the name of the new.pbf. Regarding profiles, default installation only activates car profile. For other profiles, docker/conf/ors-config.json should be modified identifying the active profiles array and adding the new one.
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Scalas, M. (2023). Pedestrian Isochrones Facilities Overlapping with Openrouteservice. An Easy, Fast and Opensource Indicator in Novara, Italy. In: Gervasi, O., et al. Computational Science and Its Applications – ICCSA 2023 Workshops. ICCSA 2023. Lecture Notes in Computer Science, vol 14104. Springer, Cham. https://doi.org/10.1007/978-3-031-37105-9_20
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