Seventy-year chronology of Salinas in southern France: coastal surfaces managed for salt production

kml files constructed for "Seventy-year chronology of Salinas in southern France: coastal surfaces managed for salt production and conservation issues for abandoned sites"

For the years 1975, 2000, 2006, 2012, and 2018, topographical maps and aerial photographs were obtained the IGN web portals (Géoportail; Géoportail, section “remonter le temps”). Literature data and knowledge of the localisation of pumping stations and functioning of exploited Salinas obtained from expert interviews were used to re-itemise the functional pre-concentration ponds not included in CLC-class 4.2.2, as belonging to the Salinas. Polygons were created manually for these items and constituted an added class 4.2.2.A to distinguish these added surfaces from those recognised by Corine land-cover as 4.2.1 or 5.2.1. Both classes were systematically merged into a single shapefile for each Salina and the polygons obtained were checked against topographic maps and aerial photographs to verify if these represented the real coverage of the Salina and corrected if needed. Hence , the ensembles of the exploited Salinas in these 6 years were named as “Salinas_Mediterranean_France_xxxx.kml”, with xxxx as the year).

本数据集包含为《法国南部萨利纳斯盐场七十年时序：盐业生产管控的海岸地表与废弃场地保护议题》所构建的KML（Keyhole Markup Language）文件。针对1975、2000、2006、2012及2018五个年份，研究人员从法国国家地理信息研究院（IGN）的门户网站（Géoportail，其“回溯时光”板块）获取了地形图与航空影像。通过专家访谈获取的文献数据、泵站位置信息以及运营中萨利纳斯盐场的运行资料，被用于重新归类未被纳入CORINE土地覆盖（CORINE Land Cover, CLC）4.2.2类别的功能性预浓缩盐池，将其划归为萨利纳斯盐场范畴。研究人员为这些盐池手动绘制多边形要素，并新增4.2.2.A类别，以区分本次新增的盐场地表与CORINE土地覆盖中归类为4.2.1或5.2.1的地表类型。将上述两个类别系统性整合为每个萨利纳斯盐场专属的单一Shapefile文件，并对照地形图与航空影像核验所绘制的多边形是否准确反映盐场的实际覆盖范围，必要时进行修正。因此，上述六个年份中运营中的萨利纳斯盐场的集合文件被命名为"Salinas_Mediterranean_France_xxxx.kml"，其中xxxx对应具体年份。