Geological Map of Spain. Scale 1:50.000 - Sheet 336 - PORTELA D'HOME

The sheet 336 (PORTELA D'HOME) of the National Geological Map (MAGNA), was made in 1974 and published in 2008 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1974年编制、2008年发布的国家地质图（National Geological Map, MAGNA）第336幅（PORTELA D'HOME幅），比例尺为1:50000。该地质图展示了地表出露的物质（岩石与沉积物）的性质、空间分布，以及所表征的不同制图单元（cartographic units）间的几何关系。 地质填图单元（geological mapping unit）是指具有共同年代范围的一种或多种岩性（lithologies）的集合体，以对应比例尺或规定分辨率在图上予以表示。每个填图单元及各类地质构造（geological structures），均通过专属符号在图上呈现。将此类单元绘制于地形底图（topographic base map）之上，可提供一定的三维空间信息，该信息可通过其他地质数据、地质剖面（geological sections）、地层剖面（stratigraphic profiles）、钻探取样（polls）等资料补充完善。该图的图例（legend）为象形图标（pictogram），用于表征不同填图单元的空间关系，包括年代序列（chronology）、叠置关系（overlapping）、几何关系、侧向相变化（lateral facies changes）等，同时还涵盖了区域框架内该幅图的构造、水文地质（hydrogeological）与地质位置信息。 自1991年起，MAGNA国家地质图系列便与同比例尺地貌图（geomorphological map）一体化编制。本幅图涵盖了地表全部地质内容，并提供了关于地表形态的结构化精准信息。其编制基于地貌成因（morphogenesis）与地貌年代学（morphocronology），并采用参考地质图的表格/图例中所载的对应年代地层柱（chronostratigraphic column）。图中通过符号、色彩模式以及地表沉积物或岩性地层单元要素，对侵蚀与沉积形成的地貌形态进行个体化表征。 MAGNA系列的每一幅图均配有公开出版、经过编辑且为数字格式的说明报告。 该数字信息以覆盖数据集（coverage）与ESRI Shape格式（Shape format (ESRI)）存储，另有一份指南对数字信息的物理结构及其编码规则（codification）进行说明。