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were merged into a unified aviation\u2011movement layer.Hazard ranks were assigned per route class.Terrain\u2011based modifiers increased hazard in areas where elevation imposes operational constraints.Control\u2011zone buffers were integrated to represent high\u2011risk airport operations.PurposeSupports:Aviation\u2011related disaster managementStrategic risk identificationEarly\u2011warning planningAirport safety\u2011zone delineationProvincial\u2011level transport\u2011risk modellingThe layer represents relative hazard, not observed aviation\u2011incident frequency.", "geometryType": "esriGeometryPolygon", "sourceSpatialReference": { "wkid": 4148, "latestWkid": 4148, "xyTolerance": 8.98315284119521E-9, "zTolerance": 0.001, "mTolerance": 0.001, "falseX": -400, "falseY": -400, "xyUnits": 9.999999999999999E8, "falseZ": -100000, "zUnits": 10000, "falseM": 0, "mUnits": 1 }, "copyrightText": "SRK Consulting\n\nCreator: Herman Booysen (hbooysen@srk.co.za)\nAviation Hazard Analysis: SRK 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