Geological Map of Spain. Scale 1:50.000 - Sheet 828 - BARCARROTA

The sheet 828 (BARCARROTA) of the National Geological Map (MAGNA), was made in 1977 and published in 1996 by the Geological Survey of Spain. It is distributed at scale 50000. The geological map shows the nature of materials (rocks and sediments) that appear on the surface, their spatial distribution and geometric relationships between the different cartographic units represented. A geological mapping unit is the grouping of one or more lithologies with common age range, which is represented on the map at a scale or defined resolution. Each mapping unit, and the different geological structures, is represented on the map with a symbolism itself. The representation of these units on the topographic base map provides some three-dimensional information that is completed with other geological data and geological sections, stratigraphic profiles, polls, etc. The map legend is a pictogram representing the spatial relationship of the different mapping units (chronology, overlapping, geometric relationship, lateral facies changes, etc.). It also includes structural, hydrogeological and geological location of the sheet within the regional schemes. Since 1991, the Geological Map Series MAGNA is made inseparably with the geomorphological map on the same scale. This map incorporates everything on the surface geology and provides a structured and accurate information of the land forms. It is organized on the basis of morphogenesis and morphocronology incorporated the map using the corresponding chronostratigraphic column included in a table / legend inspired by the geological map. The forms, erosional and depositional, are represented on the map by individualized by symbols and patterns of color and surface deposits or lithological formations elements that provide information. For each sheet of the series MAGNA there is an explanatory report published, edited and in digital format. The digital information is stored in coverage and Shape format (ESRI). There is a guide that describes the physical structure of the digital information and its codification.西班牙地质调查局（Geological Survey of Spain）于1977年编制、1996年发布的国家地质图（MAGNA）第828幅（BARCARROTA幅），比例尺为1:50000。该地质图旨在展示地表出露的物质（岩石与沉积物）属性、空间分布特征，以及各制图单元间的几何关系。 地质填图单元是指具有共同年代范围的一种或多种岩性的集合体，以对应比例尺或既定分辨率在图上予以表示。各填图单元及不同地质构造均通过专属符号在图件中呈现。将上述填图单元绘于地形底图之上，可提供一定的三维空间信息，此类信息可辅以其他地质数据、地质剖面、地层剖面、钻探取样等予以完善。本图图例采用象形符号，用以阐明各填图单元的空间关联（涵盖年代序列、叠置关系、几何联系以及侧向相变化等），同时标注该幅图在区域地质框架内的构造、水文地质与地质位置信息。 自1991年起，MAGNA系列国家地质图已与同比例尺地貌图实现一体化编制。该系列图件囊括地表全部地质信息，可提供结构化且精准的地表形态数据。其编制以地貌成因与地貌年代学为依据，参考地质图图例设计专属表格与图例，并纳入对应年代地层柱。侵蚀地貌与沉积地貌均通过专属符号、色彩样式以及可提供相关信息的地表沉积物或岩性地层要素进行区分表示。 MAGNA系列的每一幅图件均配有经过编辑、公开出版的数字化说明报告。 数字化信息以覆盖件（coverage）与Shapefile格式（ESRI）存储，另有配套指南对数字化信息的物理结构与编码规则进行详细说明。