Marker shade
{"type":"Polygon","coordinates":[[[-0.483965821,51.888291667],[-0.45701652,51.888082625],[-0.454894819,51.891910744],[-0.45268752,51.892096193],[-0.448902226,51.891894402],[-0.441130924,51.889713757],[-0.437187327,51.892342713],[-0.438441169,51.893109316],[-0.437054284,51.894043118],[-0.437601963,51.894383076],[-0.433068911,51.896309949],[-0.411853424,51.896466147],[-0.410962689,51.899443314],[-0.408112789,51.901944568],[-0.404154326,51.898018273],[-0.40391003,51.896914334],[-0.401885736,51.896044402],[-0.402675637,51.895082235],[-0.401993567,51.894768154],[-0.399022464,51.897356008],[-0.397877819,51.899464288],[-0.394426781,51.896663081],[-0.392340338,51.8987216],[-0.392566524,51.900325202],[-0.389797206,51.899033901],[-0.387318047,51.899305674],[-0.384280999,51.898351351],[-0.380512771,51.899548504],[-0.380203507,51.901033297],[-0.378414247,51.901638075],[-0.377513923,51.898425446],[-0.373718292,51.895185505],[-0.364655776,51.894007016],[-0.359114224,51.889099458],[-0.35771745,51.886436438],[-0.354244584,51.88400956],[-0.352002865,51.879593891],[-0.35304187,51.878878892],[-0.349860907,51.878668066],[-0.350731293,51.876123192],[-0.354638983,51.875156415],[-0.353908105,51.870547859],[-0.355239926,51.867247583],[-0.353769284,51.864322692],[-0.350347436,51.860830903],[-0.349548924,51.857175294],[-0.342197517,51.853005826],[-0.340970177,51.850567092],[-0.339510406,51.84959786],[-0.34230092,51.847386492],[-0.342062854,51.846633254],[-0.344329125,51.845368567],[-0.357213067,51.840074946],[-0.359069835,51.841428125],[-0.363332181,51.84209716],[-0.364974755,51.837909089],[-0.3676454,51.834903418],[-0.36875472,51.831075641],[-0.374079261,51.829187379],[-0.398387379,51.837325787],[-0.408713844,51.842581331],[-0.412009286,51.846165892],[-0.421525364,51.850197334],[-0.421655763,51.849542695],[-0.42487247,51.849435602],[-0.425259347,51.846712754],[-0.431677931,51.848879132],[-0.43274963,51.848118371],[-0.43901078,51.851827031],[-0.447548765,51.847593412],[-0.454087472,51.853024275],[-0.457899356,51.850590792],[-0.46120778,51.852605967],[-0.464128905,51.850139055],[-0.467931135,51.85266945],[-0.470119331,51.855792874],[-0.478323403,51.853128029],[-0.477005016,51.85015805],[-0.471220173,51.845459556],[-0.479595525,51.842135974],[-0.490958012,51.842810937],[-0.492087122,51.838344889],[-0.49190681,51.835270101],[-0.496757431,51.837316717],[-0.501843616,51.836786349],[-0.505450553,51.831653886],[-0.506041944,51.827291437],[-0.511218097,51.825885194],[-0.508835424,51.824039571],[-0.501618668,51.821478721],[-0.502510683,51.820568428],[-0.50090022,51.819386158],[-0.504300723,51.81768871],[-0.503992458,51.816572476],[-0.502307491,51.815450491],[-0.517539693,51.808448328],[-0.519753043,51.805087221],[-0.524822598,51.806056399],[-0.530459198,51.809443144],[-0.532242869,51.808745122],[-0.536949995,51.814116964],[-0.543204453,51.815455235],[-0.542771348,51.815751093],[-0.543735689,51.816976026],[-0.541709668,51.818436367],[-0.548523621,51.824149437],[-0.553639131,51.826744478],[-0.548960891,51.828012313],[-0.543755336,51.82456775],[-0.539657051,51.828254045],[-0.537644794,51.831464237],[-0.548271207,51.835883069],[-0.551071938,51.839605088],[-0.555952817,51.843302161],[-0.556258712,51.84472124],[-0.562013004,51.845546978],[-0.56449257,51.847418753],[-0.566846004,51.850799541],[-0.563706304,51.851230567],[-0.568745174,51.851392745],[-0.571467144,51.855026914],[-0.569274099,51.858061919],[-0.573522326,51.860840676],[-0.573887756,51.862465371],[-0.577292685,51.865984521],[-0.582507898,51.867794474],[-0.583589258,51.87031524],[-0.608996258,51.875554706],[-0.612586932,51.877549134],[-0.620114988,51.88547644],[-0.628272591,51.882123574],[-0.637366298,51.882630268],[-0.65480748,51.887891592],[-0.65798509,51.890418232],[-0.659639517,51.89058904],[-0.660392228,51.892212654],[-0.659010327,51.892941409],[-0.660213092,51.894620322],[-0.657680431,51.894808914],[-0.650248828,51.900076523],[-0.651508047,51.901079103],[-0.648456335,51.901300372],[-0.645551187,51.899304975],[-0.63228516,51.908554827],[-0.627276468,51.90366365],[-0.627700723,51.903380862],[-0.621716053,51.894080328],[-0.615813734,51.888753713],[-0.610664311,51.893357832],[-0.600924968,51.896695968],[-0.591345156,51.896981549],[-0.591853734,51.897677642],[-0.586571832,51.897907451],[-0.581371479,51.899848147],[-0.571158105,51.899474704],[-0.570535797,51.897604998],[-0.56739427,51.896575049],[-0.569047518,51.895362418],[-0.56859816,51.894638467],[-0.56730134,51.893875525],[-0.565724851,51.894096418],[-0.560990167,51.890087703],[-0.555524334,51.890148474],[-0.544405841,51.886378849],[-0.55062551,51.882698044],[-0.548843157,51.882777653],[-0.550016725,51.879402374],[-0.54913799,51.879305158],[-0.549782734,51.877870013],[-0.54602383,51.876537841],[-0.545396581,51.877156801],[-0.541857973,51.87634058],[-0.530648085,51.876895264],[-0.528682382,51.875075146],[-0.526245626,51.874336946],[-0.521647148,51.876310509],[-0.519517561,51.87347835],[-0.521819664,51.872777205],[-0.520471133,51.872173092],[-0.517972294,51.87276027],[-0.513172993,51.869584123],[-0.5062751,51.871335552],[-0.504632135,51.870596189],[-0.501851348,51.873324856],[-0.502740886,51.873919747],[-0.50102461,51.873011839],[-0.496699048,51.875060187],[-0.495040524,51.873829599],[-0.493069383,51.874999375],[-0.496676377,51.877876974],[-0.495405026,51.878403842],[-0.501133083,51.881995343],[-0.494012222,51.884869818],[-0.495689756,51.886281428],[-0.493842944,51.887063402],[-0.483965821,51.888291667]]]}