Mapa dinâmico com OpenStreetMap e biblioteca Leaflet: Um estudo de caso de mapeamento da COVID-19 no Brasil
Abstract
We present a case study of the application of the collaborative cartographic base OpenStreetMap and the open JavaScript library Leaflet, in a dynamic map available on the Internet (http://covid19.atlasnf.ivides.org), on the cases of COVID-19 in the North and Northwest Mesoregions of the State of Rio de Janeiro (Brazil). Dynamic mapping is an initiative of the Instituto Virtual para o Desenvolvimento Sustentável (IVIDES.org), in partnership with the Atlas Socioeconômico Norte Fluminense, an extension project of the Universidade Federal Fluminense, sponsored by the Pro-Rectory of Extension (PROEXT-UFF). Data stored in a shapefile (.shp) is extracted and displayed when interacting with the map. The interaction is provided by JavaScript functions from the Leaflet library. Three layers are available - health infrastructure, active positive cases of COVID-19 and confirmed cases of COVID-19. The article includes the main functions used and points out the advantages and disadvantages of applying these technologies in the case in question. There are advantages of using maps of this nature, such as: access to data from anywhere with available Internet and regardless of the type of device or operating system, access to metadata associated with geolocated markers on the map, immediate switching between layers, almost unlimited number of layers. On the other hand, there may be limitations regarding the use of such dynamic maps online by people with little familiarity with new information technologies. With the publication of the article, it's expected to contribute to the use of free software in cartographic applications.
References
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Valente, H. C. M.; Oliveira, L. B. de; Azevedo, L. de A.; Maciel, C. J. N.; Silva, M. T. M. V.; Santos, E. V. M.; Cintra, D. P.; Souto, R. D. Atlas COVID-19 Norte e Noroeste Fluminense: a busca pela melhor compreensão do usuário. V Jornada de Geotecnologias do Estado do Rio de Janeiro - V JGEOTEC. Rio de Janeiro, 09 a 12 de novembro de 2020.
