const airfields_57 = {
"type": "FeatureCollection",
"name": "Airfields",
"crs": { "type": "name", "properties": { "name": "urn:ogc:def:crs:OGC:1.3:CRS84" } },
"features": [
{ "type": "Feature", "properties": { "OBJECTID": 1.0, "Name": "Blue Ridge Airfield", "SHAPE_Leng": 0.029200785710931002, "SHAPE_Area": 3.7181264213999998e-05, "Built": 1938, "Closed": 1951 }, "geometry": { "type": "MultiPolygon", "coordinates": [ [ [ [ -77.450969624999971, 38.954121523000026 ], [ -77.45577613599994, 38.95336009500005 ], [ -77.453158728999938, 38.964353205000066 ], [ -77.450493732999973, 38.964448383000047 ], [ -77.451159981999979, 38.958309374000066 ], [ -77.450969624999971, 38.954121523000026 ] ] ] ] } },
{ "type": "Feature", "properties": { "OBJECTID": 3.0, "Name": "Centreville Airport", "SHAPE_Leng": 0.017803242711125999, "SHAPE_Area": 1.4759698191e-05, "Built": 1954, "Closed": 2001 }, "geometry": { "type": "MultiPolygon", "coordinates": [ [ [ [ -77.489855966999983, 38.877972822000061 ], [ -77.485513449999985, 38.88151227000003 ], [ -77.482241690999956, 38.879846647000079 ], [ -77.488130856999987, 38.876991294000049 ], [ -77.489855966999983, 38.877972822000061 ] ] ] ] } },
{ "type": "Feature", "properties": { "OBJECTID": 4.0, "Name": "Glascock Airport", "SHAPE_Leng": 0.019877256969074001, "SHAPE_Area": 2.3089669419000001e-05, "Built": 1941, "Closed": 2007 }, "geometry": { "type": "MultiPolygon", "coordinates": [ [ [ [ -77.542888203999951, 38.946174123000048 ], [ -77.539467728999966, 38.943526973000075 ], [ -77.541371296999955, 38.938559848000068 ], [ -77.544821515999956, 38.939957781000032 ], [ -77.542888203999951, 38.946174123000048 ] ] ] ] } },
{ "type": "Feature", "properties": { "OBJECTID": 5.0, "Name": "June Field", "SHAPE_Leng": 0.016300989555385999, "SHAPE_Area": 7.576531935e-06, "Built": 1975, "Closed": 2007 }, "geometry": { "type": "MultiPolygon", "coordinates": [ [ [ [ -77.413188214999934, 39.064824439000063 ], [ -77.415015640999968, 39.057990627000038 ], [ -77.416081639999959, 39.058219055000052 ], [ -77.414216141999987, 39.065052867000077 ], [ -77.413188214999934, 39.064824439000063 ] ] ] ] } },
{ "type": "Feature", "properties": { "OBJECTID": 6.0, "Name": "Richardson Airfield", "SHAPE_Leng": 0.018106498262697002, "SHAPE_Area": 1.3749835285e-05, "Built": 1963, "Closed": 1974 }, "geometry": { "type": "MultiPolygon", "coordinates": [ [ [ [ -77.42970652799994, 39.067551896000055 ], [ -77.42799331599997, 39.067135490000055 ], [ -77.429647041999942, 39.060223156000063 ], [ -77.431693377999977, 39.06069904800006 ], [ -77.42970652799994, 39.067551896000055 ] ] ] ] } },
{ "type": "Feature", "properties": { "OBJECTID": 7.0, "Name": "Godfrey Field (Original)", "SHAPE_Leng": 0.017539461603177001, "SHAPE_Area": 1.1558287249000001e-05, "Built": 1918, "Closed": 1951 }, "geometry": { "type": "MultiPolygon", "coordinates": [ [ [ [ -77.55100487499999, 39.111603032000062 ], [ -77.551004856999953, 39.111602213000026 ], [ -77.551028651999957, 39.111602213000026 ], [ -77.55100487499999, 39.111603032000062 ] ] ], [ [ [ -77.55104253199994, 39.113324348000049 ], [ -77.543951737999976, 39.113371937000068 ], [ -77.543856559999938, 39.111849082000049 ], [ -77.55100487499999, 39.111603032000062 ], [ -77.55104253199994, 39.113324348000049 ] ] ] ] } },
{ "type": "Feature", "properties": { "OBJECTID": 8.0, "Name": "Lipscomb Airfield", "SHAPE_Leng": 0.035432943656334003, "SHAPE_Area": 6.3291381995000004e-05, "Built": 1958, "Closed": 1995 }, "geometry": { "type": "MultiPolygon", "coordinates": [ [ [ [ -77.559695838999971, 39.154972360000045 ], [ -77.555032094999945, 39.159398157000055 ], [ -77.544752823999943, 39.152545309000061 ], [ -77.546370856999943, 39.151022454000042 ], [ -77.548893085999964, 39.150261027000056 ], [ -77.555936289999977, 39.153116380000029 ], [ -77.559695838999971, 39.154972360000045 ] ] ] ] } }
]
}