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Cette étude avait abouti à une cartographie de synthèse qui partitionnait la région en plusieurs classes selon la probabilité de présence d\u2019une zone humide et la méthode utilisée pour la délimitation.\n\nUn ensemble de données provenant de plusieurs sources ont ainsi été croisées, hiérarchisées et agrégées pour former la cartographie des enveloppes d\u2019alerte humides.", "geometryType": "esriGeometryPolygon", "sourceSpatialReference": { "wkid": 3949, "latestWkid": 3949, "xyTolerance": 0.001, "zTolerance": 0.001, "mTolerance": 0.001, "falseX": -34427400, "falseY": -22373000, "xyUnits": 10000, "falseZ": 0, "zUnits": 1, "falseM": 0, "mUnits": 1 }, "copyrightText": "DRIEAT Île-de-France", "parentLayer": null, "subLayers": [], "minScale": 0, "maxScale": 0, "referenceScale": 0.0, "drawingInfo": { "renderer": { "type": "uniqueValue", "field1": "CLASSE", "uniqueValueInfos": [ { "symbol": { "type": "esriSFS", "style": "esriSFSSolid", "color": [ 255, 0, 0, 255 ], "outline": null }, "value": "1", "label": "Classe 1: Zones humides de façon certaine et dont la délimitation a été réalisée par des diagnostics de terrain selon les critères et la méthodologie décrits dans l\u2019arrêté du 24 juin 2008 modifié" }, { "symbol": { "type": "esriSFS", "style": "esriSFSSolid", "color": [ 255, 170, 0, 255 ], "outline": null }, "value": "2", "label": "Classe 2: Zones dont le caractère humide ne présente pas de doute mais dont la méthode de délimitation diffère de celle de l\u2019arrêté :" }, { "symbol": { "type": "esriSFS", "style": "esriSFSSolid", "color": [ 137, 205, 102, 255 ], "outline": null }, "value": "3", "label": "Classe 3: Zones pour lesquelles les informations existantes laissent présager une forte probabilité de présence d\u2019une zone humide, qui reste à vérifier et dont les limites sont à préciser." }, { "symbol": { "type": "esriSFS", "style": "esriSFSSolid", "color": [ 0, 92, 230, 255 ], "outline": null }, "value": "5", "label": "Classe 5: Zones en eau, ne sont 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