Land Occupancy 2018 Hérault

The OCS GE (large-scale land cover) repository is a vector database describing land cover and land use for the entire metropolitan area and the overseas departments and regions (DROM). Its model has two dimensions: it separates land use from land use (see precise nomenclature). The geometric accuracy of the OCSGE is metric and is based on the RGE®. Its information comes mainly from aerial photographs updated every three years, and it therefore has a temporal consistency with them. Successive vintages make it possible to quantify and qualify changes in the soil surface. By 2025, the new generation GE SCO – financed by the Directorate-General for Planning, Housing and Nature (DGALN) of the Ministry of Ecological Transition and Territorial Cohesion – will offer complete coverage of the national territory in at least two vintages. It is a core data layer, which can be enriched if necessary at refined thematic levels to take into account local specificities and respond to specific needs. As part of the artificialization observatory, IGN is carrying out work that optimizes the current production chain in order to achieve the greatest possible automation. The aim is to meet two objectives: • a significant reduction in costs, minimising the share of human photo-interpretation, • and a significant reduction in production times making it possible to produce 1/3 of France every year under cruising conditions. This is done by using artificial intelligence (AI) processes such as ‘deep learning’. The GE SCO production chain is based on an infrastructure with significant computing capacities and storage space to host and process large data. This database will be crucial for monitoring artificialisation and achieving net zero artificialisation by 2050, as set out in the ‘Climate and Resilience’ law of 22 August 2021. Further information is available on the Artificialisation Portal. The BD OCS GE N-G is based on the national nomenclature recommended by the National Geographical Information Council (CNIG), developed by the Centre d’études et d’expertise sur les risques, l’environnement, la mobilité et l’aménagement (CEREMA), under the supervision of the Ministry for Ecology, Sustainable Development and Energy (MEDDE.DGALN). The BD OCS GE complies with the national production recommendations that accompany the national nomenclature. It is based on an intermediate data layer, the national reference system for the main networks constituting the ‘National Ossature’. It has four main functions: • ensure geographical continuity between territories; • ensure a reference geometry; • partition territories homogeneously; • ensure spatial cohesion between territorial scales. OPenIG makes available in shapefile format the OCS GE comic for Hérault and the associated documentation. In addition, the IGN provides a user guide designed to facilitate the understanding and use of GE SCO data, presented here at the level of the national pillar. The first section provides a detailed description of the GE OCS and its characteristics, the second presents how these data can be exploited by geomaticians using QGIS software. Each party may be consulted independently. Here is the link to access this guide: https://storymaps.arcgis.com/stories/193550c4e4af4f92845201d74ca8a002OCS GE（大规模土地覆盖）数据集仓库是一套矢量数据库，用于描述全都会市区及海外省与海外大区（DROM）的土地覆盖与土地利用情况。其模型包含两个维度：区分土地覆盖与土地利用（详见精准命名规则）。OCS GE的几何精度为公制标准，且基于RGE®。其数据主要来源于每三年更新一次的航空影像，因此与影像的时间一致性良好。不同版本的数据集可用于量化并表征地表变化的特征。截至2025年，由法国生态转型与领土凝聚部规划、住房与自然总局（DGALN）资助的新一代GE SCO数据集，将至少以两个版本实现法国全境的覆盖。该数据集属于核心数据图层，可根据需要在细化的专题层级上进行扩充，以适配本地特殊情况并满足特定需求。作为地表人工化观测平台的组成部分，IGN（法国国家地理研究院）正在优化现有生产流程，以实现尽可能高的自动化程度。其目标达成两大核心指标：一是大幅降低成本，减少人工影像解译的占比；二是显著缩短生产周期，在常规产能下可实现每年完成法国1/3国土的数据集生产。这一目标将通过深度学习等人工智能（AI）技术实现。GE SCO的生产链依托具备强大计算能力与存储空间的基础设施，用于存储和处理海量数据。正如2021年8月22日颁布的《气候与韧性法案》所规定的，该数据库对于监测地表人工化进程、并于2050年前实现人工化净零目标至关重要。更多信息可登录地表人工化专题门户查询。BD OCS GE N-G数据集采用法国国家地理信息委员会（CNIG）推荐的国家命名规范，该规范由风险、环境、交通与规划研究与专家中心（CEREMA）制定，并由法国生态、可持续发展与能源部（MEDDE.DGALN）监管。BD OCS GE数据集遵循配套国家命名规范的国家级生产标准。该数据集依托“国家骨架网络”核心主网的国家级参考系统这一中间数据图层构建，具备四项核心功能：一是保障各辖区间的地理连续性；二是提供参考几何基准；三是实现辖区的均匀分区；四是维系不同层级辖区间的空间协同性。OpenIG 以shapefile格式提供埃罗省的OCS GE数据集及相关文档。此外，IGN（法国国家地理研究院）还提供了一份用户指南，旨在帮助用户理解并使用GE SCO数据集，本指南以国家级核心层的视角进行编写。指南第一部分详细介绍了GE OCS数据集及其特性，第二部分则讲解了测绘地理信息从业者如何利用QGIS软件对该数据集进行开发应用。两部分内容均可独立查阅。该指南的访问链接为：https://storymaps.arcgis.com/stories/193550c4e4af4f92845201d74ca8a002