No abstract

Volunteered Geographic Information (VGI) has become more evident at the same time as open-source platforms become worldwide popular, both resulting from people easily accessing geographic information on their smartphones. Aiming to investigate the main aspects of this research field, a bibliometric investigation was developed focusing on 10-year period (2011-2020). The analyses were performed based on Scopus database, VOS Viewer and Bibliometrix softwares, approaching: publications over years, document types, subject areas, core sources, main papers, countries, authors and most recurrent keywords. The initial results indicated that: publications have increased at an annual rate of 21.69%, the most published document type was article and only 16 journals were responsible for 33.33% of those 1200 articles published. USA, Germany and UK are major countries researching VGI and the last two are also host countries of the main authors. Although the term VGI has been defined among Citizen Science, the network of keywords occurrence showed that GIS (Geographic Information Systems) is an outstanding study field. However, the network visualization based on average publication per year revealed Citizen Science as a research field still moving forward. Keywords such as OpenStreetMap, data quality, accuracy assessment, social media and crowdsourcing showed to be more widespread among the field, the opposite occurs with applications in urban areas, land use and ecosystem services. Overall, the bibliometric indicators have revealed to be effective in order to access VGI as a research topic and indicated a promising trend in themes involving social media, remote sensing, urban area, crowdsourcing and PPGIS.

After more than a year since the first case of COVID-19 in Brazil, some public sectors are still looking for tools to adapt their activities to epidemiological recommendations that require social distancing. Urban planning and territorial management are indispensable activities to the dynamics of cities and, therefore, cannot be interrupted. In this context, this article aims to investigate the use of Unmanned Aerial Vehicles (UAVs) as a territorial management tool, focusing on the Urban Technical Registration and Urban Land Regularization. From the case study methodology, it was verified in the experiences and current legislations that features related to property (such as constructions and vertical typology), urban infrastructure (e.g., manholes, sidewalks, lighting poles, hydrants, etc) and environmental aspects (mainly related to vegetation and water resources) need to be mapped for such purposes. We also considered the possibility of acquiring georeferenced and altimetric data.  Finally, the use of orthophotos from UAVs has proved feasible for application in public territorial management in the context of epidemiological restrictions of isolation and social distancing imposed by the COVID-19 pandemic. This tool was also promising in the post-pandemic scenario, as it presents itself as a less invasive solution for property mapping.

Poderá A existência e manutenção de áreas verdes no meio urbano é vital para a certificação de qualidade ambiental e de vida da população. Considerando a previsão legal destes espaços, faz-se necessário utilizar ferramentas que auxiliem na localização e visualização da densidade de cobertura vegetal presente nas cidades, identificando as áreas menos vegetadas e monitorando o crescimento ou decrescimento ao longo dos anos. Visando contribuir neste contexto, foi realizado um estudo na mancha urbana do município de Cabo Verde - MG, analisando-se imagens de satélite (Sentinel 2A) dos anos de 2016 e 2022, através do método Índice de Vegetação por Diferença Normalizada (NDVI). Os mapas de NDVI mostraram as mudanças de vegetação espaço-temporais ocorridas no período investigado, verificando-se uma redução de 1,39 km2 de áreas urbanas vegetadas, sendo a redução mais expressiva observada nas regiões periféricas. Nesse sentido, a aplicação de instrumentos de geoprocessamento e sensoriamento remoto implica na verificação concisa do objetivo estipulado, uma vez constatadas modificações expressivas na paisagem da área de estudo, perante as áreas verdes.  PALAVRAS-CHAVE: Índice de Vegetação. SIG. Planejamento Urbano.

Os movimentos de urbanização e capitalistas causaram o distanciamento entre a população urbana e a origem de seus alimentos. Os supermercados refletem a visão do alimento como mercadoria e o esvaziamento de interações sociais – os “não lugares”. Este trabalho propõe um levantamento bibliográfico de caráter reflexivo acerca de práticas que conectem as esferas campo-cidade, trazendo um debate acerca das feiras livres, espaços públicos e projetos comunitários. Também são levantadas questões que desencorajem o êxodo rural, como a valorização da agricultura familiar e cooperações.