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The present database is composed of a polygon shape file (.shp) dedicated to GIS applications. This seafloor surface represents the area within which (sub-)outcropping methane derived authigenic carbonates were identified based on ship-borne multibeam bathymetry and seafloor backscatter data; as displayed in Figs. 4 and S1a of Dupré et al. 2020 (Dupré S, Loubrieu B, Pierre C, Scalabrin C, Guérin C, Ehrhold A, Ogor A, Gautier E, Ruffine L, Biville R, Saout J, Breton C, Floodpage J, Lescanne M (2020) The Aquitaine Shelf Edge (Bay of Biscay): A Primary Outlet for Microbial Methane Release. Geophysical Research Letters 47 (7):e2019GL084561. doi:10.1029/2019gl084561). The presence of (sub-)outcropping methane-derived authigenic carbonates at the seafloor was confirmed by remotely-operated-vehicle dives during the GAZCOGNE2 marine expedition. The acoustic data were acquired in 2013 on board the R/V Le Suroît during the GAZCOGNE1 expedition with two ship-borne multibeam echosounders, the Kongsberg EM302 and EM2040, with transmission frequency of 30 and 200 kHz, respectively. Details on multibeam data acquisition, processing and interpretation of sub-outcropping methane-derived authigenic carbonate structures are presented in Dupré et al 2020 (including a Supporting Information section). Cited from Dupré et al 2020: “The carbonates are exclusively located along the shelf edge with the majority (98%) between 140 and 220 m water depths. The (sub-)outcropping carbonates are spread over a 375 km2 area that extends over a distance of 80 km between the Cap Ferret and Capbreton canyons. The western spatial limit of the methane-derived authigenic carbonates coincides with the shelf break.”
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Administrative divisions of Aringa, Madi, Madi-Okollo, and Terego County as of December 2001, Uganda
The shapefile represents the administrative divisions of Aringa, Madi, Madi-Okollo, and Terego County of Arua district in the North of Uganda as of December 2001. The shapefile subdivides the counties into 7 subcounties. These, in turn have 41 subdivisions that are called parishes. The parishes are further subdivided into 345 villages. We digitized the administrative units from paper maps that we have received from Uganda Bureau of Statistics in Entebbe. The associated population size on village level represents the provisional result of the Uganda census 2002.
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The shapefile represents the administrative divisions of Adjumani district in the North of Uganda as of December 2001. The shapefile divides Adjumani district into 1 county. The county is subdivided into 5 subcounties and one town council. These, in turn have 15 subdivisions that are called parishes. The parishes are further subdivided into 73 villages. We digitized the administrative units from paper maps that we have received from Uganda Bureau of Statistics in Entebbe. The associated population size on village level represents the provisional result of the Uganda census 2002.
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The map of “Switzerland during the Last Glacial Maximum (LGM), at a scale of 1:500,000” shows the maximum extent of glaciation in Switzerland at the height of the last Ice Age about 24,000 years BP. It incorporates the latest results of research on the Ice Age in Switzerland in a clearly legible format.
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Database of mineral resources in Romania for Minerals4EU contains basic information on mineral occurences from the Geological Institute of Romania data base. Mining, exploring, resources/reserves and production statistics is not included in this version. Database is in incipient phase of completion, it will be completed with relevant inforation in next time. The information is harmonized according to specifications in the Minerals4EU project.
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The approach to the affection of the submarine noise in the Levantine-Balear Subdivision has been made for a 5' x 5' grid, being the noise source navigation. To do this, a semi-quantitative index has been developed that integrates the analysis of AIS data (merchant vessels) and VMS data (fishing ships). For both, cells have been categorized according to the traffic intensity based on the density of AIS and VMS signals in a month. In both cases, different intensity intervals have been established, and different cases have been given different weights. In addition, adjacent cells have been selected (classified into four ranges), giving them another way of importance depending on the proximity. The zero range coincides with the cells in which the signal density was recorded, while the first range corresponds to those cells limiting with the zero level, and so on. The final result is the addition of all the weights in each cell, taking into account the maximum value for the bordering cells. The values range between 0 and 3.1, with the following levels of classification: Very High:> 2 / High: 1.71 - 2 / Medium: 0.41 - 1.7 / Low: 0.1 - 0, 4 / Very Low < 0.1
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The approach to the affection of the submarine noise in the North Atlantic Marine Subdivision has been made for a 5' x 5' grid, being the noise source navigation. To do this, a semi-quantitative index has been developed that integrates the analysis of AIS data (merchant vessels) and VMS data (fishing ships). For both, cells have been selected according to the intensity of traffic effects based on the density of AIS and VMS signals in a month. In both cases, different intensity intervals have been established, and each case has been given a different weight. In addition, adjacent cells have been selected (classified into four ranges), giving them another way of importance depending on the proximity. The zero range coincides with the cells in which the signal density was recorded, while the first range corresponds to those cells limiting with the zero level, and so on. In Table 10 and Table 11 of the aforementioned document the applied values are indicated. The final result is the addition of all the weights in each cell, taking into account the maximum value for the bordering cells. The values range between 0 and 3.1, with the following levels of classification: Very High: > 2 / High: 1.71 - 2 / Medium: 0.41 - 1.7 / Low: 0.1 - 0, 4 / Very Low < 0.1
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The Geological Map of Switzerland at 1:500,000 scale covers all of Switzerland and adjoining parts of neighbouring countries. It provides an overview of the distribution of the superficial geological formations exposed in Switzerland. It is thus an important tool for improving the understanding of our environment in the context of sustainable development. It is also an essential aid for education in the fields of environmental and earth sciences, as well as for the identification and prediction of natural hazards. The previous edition appeared more than 25 years ago and the new map shows a significantly improved level of detail. The addition of new data and the revision of older geological records made during recent decades have led to significant improvements in the new version. Thanks to a revised layout, the detailed legend is now easier to read and therefore easier to understand.
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The Bouguer anomaly is defined as the difference between the gravity measured at a specific point on the Earth’s surface and a gravity value calculated at the same point assuming that the Earth’s crust is homogeneous. This map shows both the regional negative anomalies associated with the Alps and the positive anomaly of the Sesia–Finero zone that signifies an excess of mass at depth.