Oscom 2013 Soil Observatory at the municipal level in Deux-Sèvres _

The Observatoire des Sols à l’Echelle Communale (also called “OS communale” or “OSCOM”) is a geomatic tool resulting from a partnership work involving the DRAAF of Haute-Normandie (on the initiative of the project), the DDTM of Seine-Maritime, the DDTM de l’Eure and the DREAL of Haute-Normandie. It consists of generating vintage graphic layers according to a successive integration algorithm of a set of reference graphic layers, of the same vintage (except the forest layer and the Majic parcel layer dating from 2000 and 2013), e.g. from the BD-TOPO® and the BD-FORET® of the IGN, the agricultural RPG of the ASP and the Majic parcel of DGFiP. The objective is therefore to be able to estimate land cover and its evolution at the municipal or supra-communal level using a pragmatic approach based on a purely computer-based processing of heterogeneous layers, in particular in terms of precision, which implies taking precautions as to the use of the results obtained. The nomenclature used for this project is based on level 2 of the Corine Land Cover nomenclature. It consists of 5 posts at level 1 (0-Mixed spaces, 1-Artificised territories, 2-Agricultural territories, 3-Forests and semi-natural environments, 5-Wurfaces in water) and 14 level 2 posts (00-Mixed spaces, 11-urbanised areas, 12-industrial or commercial areas and communication networks, 13-Mines, landfills and construction sites, 14-Non-agricultural artificialised green spaces, 15-Unbuilt spaces awaiting requalification, 20- Mixed agricultural land, 21-Arable land, 22-Permanent crops, 23-Prairies, 24-Other agricultural land, 31-Forests, 32-Milieux with shrub and/or grass vegetation, 51-Mainland waters).市镇尺度土壤观测平台（法语原文为*Observatoire des Sols à l’Echelle Communale*，简称“OS communale”或“OSCOM”）是一款地理空间信息工具，其研发依托上诺曼底大区农业食品与林业局（DRAAF，项目发起方）、塞纳-马恩省领土发展与海事局（DDTM）、厄尔省领土发展与海事局（DDTM）以及上诺曼底大区环境、能源与可持续发展局（DREAL）的合作项目。 该工具的运作逻辑为：基于一组同版本参考矢量图层（森林图层与Majic宗地图层除外，二者分别取自2000年与2013年），通过递进式集成算法生成目标矢量图层；其参考数据源涵盖法国国家地理研究院（IGN）的BD-TOPO®与BD-FORET®数据集、法国公共服务署（ASP）的农业RPG数据，以及法国公共财政总局（DGFiP）的Majic宗地数据。 本工具的研发目标为：采用仅依托计算机处理异构图层的务实方法，实现市镇或跨市镇尺度下的土地覆盖状况及其动态变化估算；鉴于异构图层在精度层面存在差异，使用所得结果时需谨慎行事。 本项目采用的土地覆盖分类体系基于Corine土地覆盖（Corine Land Cover）分类体系的二级分类标准。 该分类体系包含5个一级类目（0-混合用地、1-人工地表区域、2-农业用地区域、3-森林与半自然环境、5-水域）以及14个二级类目（00-混合用地、11-建成城区、12-工业或商业用地与交通设施网络、13-采矿场、填埋场与建筑工地、14-非农业人工绿地、15-待重新开发的未建设用地、20-混合农用地、21-耕地、22-多年生作物种植地、23-牧草地、24-其他农业用地、31-森林、32-灌丛与草本植被区域、51-内陆水域）。