TY - JOUR AU - Figueiredo Monteiro, António AU - Vieira Sá, André AU - De Castro, Emanuel PY - 2020/11/01 Y2 - 2024/03/29 TI - Studying the degree of granite alteration using open spatial data platforms. Case studies: Guarda urban area and Estrela Geopark JF - REVISTA INTERNACIONAL MAPPING JA - MAPPING VL - 29 IS - 202 SE - Artículos Científicos DO - UR - https://ojs.revistamapping.com/MAPPING/article/view/335 SP - 06-13 AB - <p>The continuous reorganization of the territory, whether due to the<br>appearance of new buildings or to the alteration and reformulation<br>of the existing space, requires updated cartographic information.<br>This update is intended to represent the present situation, and the<br>various updates allow us to obtain a territorial history of recognized<br>importance.<br>In geotechnical cartography, the urban reorganization that includes<br>excavations, foundations, trenching, wells and boreholes, etc., allows<br>the collection of information that constitutes a large collection of<br>data. This territorial reorganization is more urgent in urban areas,<br>however, in rural and natural areas of great geological emphasis,<br>the existence of rocky outcrops and the possibility of identifying<br>and analyzing these rocky outcrops is also of great importance for<br>geotechnical cartography.<br>The present study analyzes the use of spatial data infrastructures<br>from the free Street View - Google Maps platform, which, duly incorporated<br>in open-source free software (QGIS), allows the elaboration<br>of geotechnical cartography in urban and rural areas.<br>The case studies presented here refer to the urban area of the city<br>of Guarda and to the rural zone defined as Estrela Geopark (Estrela<br>Mountain), in which granite areas are identified through modules<br>with connection to Google Street View and where the degree of<br>granite alteration is analyzed. The validation of the degree of alteration<br>of the granite is later verified through in-situ observations to<br>validate the assigned classification. Through this methodology and<br>in an expeditious way, it is possible to create geotechnical cartography<br>and the respective database with relevant and complementary<br>information to the existing geological cartography.</p> ER -