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"pref": "山形県", "jk_id": "060000097500", "name": "羽竜沼", "yomi": "はりゅうぬま", "50000": "1", "kuniezu": null, "200000": null, "remarks": "旧版５万には名称なし", "jk_url": "https://japanknowledge.com/lib/display/?lid=30020060000097500" }, "geometry": { "type": "MultiPoint", "coordinates": [ [ 140.36522109896904, 38.18395057685576 ] ] } }, { "type": "Feature", "properties": { "id": "06017", "lat": 38.48984974, "lon": 140.3994603363, "pref_no": "6", "pref": "山形県", "jk_id": "060000149200", "name": "湯沢沼", "yomi": "ゆのさわぬま", "50000": "1", "kuniezu": null, "200000": null, "remarks": "歴史地名体系では「湯野沢堤」", "jk_url": "https://japanknowledge.com/lib/display/?lid=30020060000149200" }, "geometry": { "type": "MultiPoint", "coordinates": [ [ 140.3994603363112, 38.489849739977906 ] ] } }, { "type": "Feature", "properties": { "id": "06018", "lat": 38.5017475445, "lon": 140.4052770407, "pref_no": "6", "pref": "山形県", "jk_id": "060000149200", "name": "大倉溜池", "yomi": "おおくらためいけ", "50000": "1", "kuniezu": null, "200000": null, 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null, "50000": "1", "kuniezu": null, "200000": null, "remarks": "旧版5万、地理院明治の湿地参照", "jk_url": "歴史地名体系記載なし" }, "geometry": { "type": "MultiPoint", "coordinates": [ [ 137.0359575424207, 34.59586312433541 ] ] } }, { "type": "Feature", "properties": { "id": "23012", "lat": 35.0809729494, "lon": 137.0139741995, "pref_no": "23", "pref": "愛知県", "jk_id": "230000114700", "name": "勅使池", "yomi": "ちょくしいけ", "50000": "1", "kuniezu": null, "200000": null, "remarks": "旧版5万、地理院明治の湿地参照", "jk_url": "https://japanknowledge.com/lib/display/?lid=30020230000114700" }, "geometry": { "type": "MultiPoint", "coordinates": [ [ 137.01397419952303, 35.08097294940393 ] ] } }, { "type": "Feature", "properties": { "id": "23015", "lat": 35.1718084125, "lon": 136.9725247626, "pref_no": "23", "pref": "愛知県", "jk_id": "230000026300", "name": "猫ヶ洞池", "yomi": "ねこがほらいけ", "50000": "1", "kuniezu": null, "200000": null, "remarks": "旧版5万、地理院明治の湿地参照", "jk_url": "https://japanknowledge.com/lib/display/?lid=30020230000026300" }, "geometry": { "type": "MultiPoint", "coordinates": [ [ 136.9725247626342, 35.171808412467186 ] ] } }, { "type": "Feature", "properties": { "id": "23017", "lat": 35.1262518853, "lon": 136.9435984813, "pref_no": "23", "pref": "愛知県", "jk_id": "230000079000", "name": "鼎池", "yomi": "かなえいけ", "50000": null, "kuniezu": null, "200000": null, "remarks": "地理院明治の湿地参照", "jk_url": "https://japanknowledge.com/lib/display/?lid=30020230000079000" }, "geometry": { "type": "MultiPoint", "coordinates": [ [ 136.94359848133533, 35.126251885256394 ] ] } }, { "type": "Feature", "properties": { "id": "23018", "lat": 35.3426722023, "lon": 136.9977287962, "pref_no": "23", "pref": "愛知県", "jk_id": "230000163900", "name": "入鹿池", "yomi": "いるかいけ", "50000": "1", "kuniezu": "1", "200000": "1", "remarks": null, "jk_url": "https://japanknowledge.com/lib/display/?lid=30020230000163900" }, "geometry": { "type": "MultiPoint", "coordinates": [ [ 136.9977287961764, 35.34267220230889 ] ] } }, { "type": "Feature", "properties": 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