RealtimeMap.vue: simplify geojson

      "8471": {"plate": "粤BDF471"},

      "18447": {"plate": "粤BDF447"}

    },

    geojson_line_1: [[113.99739584160139,22.610765716856296],[113.99770244929088,22.610602750604695],[113.99771094950285,22.61059767778233],[113.99771890653385,22.610591789421974],[113.99772624241524,22.61058514322198],[113.99773288526481,22.610577804306548],[113.99773876999119,22.610569844587616],[113.99824514560808,22.609808813574297],[113.998249208217,22.609802159245984],[113.99825274007058,22.60979520864264],[113.99898879543889,22.60819510708253],[113.99899240486543,22.608186143427105],[113.99899513228698,22.608176873246407],[113.99899695223624,22.60816738310082],[113.9989978477194,22.608157761604655],[113.99899781037489,22.60814809859871],[113.99899684055141,22.608138484311375],[113.99876376465981,22.606584405046835],[113.99876186005746,22.60657488398115],[113.99875904105679,22.60656559250995],[113.9987553342348,22.606556618231554],[113.99875077453878,22.606548045753847],[113.9987454049567,22.606539955896604],[113.99840124581259,22.606072409367975],[113.99839530892635,22.606065092796133],[113.9983887097732,22.60605836746942],[113.99838150693964,22.606052293094507],[113.9983737643716,22.606046923598996],[113.99836555080671,22.606042306652647],[113.99835693916405,22.60603848324417],[113.99834800589677,22.606035487317342],[113.99774294809698,22.605863822610463],[113.99773312637,22.605861563911226],[113.99772312717697,22.605860305268262],[113.99771305207776,22.60586005946536],[113.99770300340316,22.605860828999095],[113.99769308321561,22.605862606053456],[113.9976833922725,22.605865372579256],[113.996462081496,22.60628164325351],[113.99540699384544,22.60655007340282],[113.99537688636465,22.60638436471066],[113.99537457846512,22.606374521317747],[113.99537128843397,22.606364961271755],[113.99536704990152,22.60635578229431],[113.99536190619351,22.606347078211808],[113.99535590988829,22.606338937996323],[113.99534912227939,22.606331444856142],[113.99534161274892,22.60632467538524],[113.99533345805837,22.60631869878032],[113.995324741564,22.606313576133513],[113.99531555236477,22.60630935980789],[113.99491868014185,22.60615102642152],[113.99446803578164,22.605922922486105],[113.993628105381,22.605432281601264],[113.99361436378835,22.60541624974317],[113.99361283376653,22.605399929510398],[113.99403523011212,22.604697356220907],[113.99427914343141,22.604297776694622],[113.99454570612934,22.60407119840138],[113.99455101208882,22.604066349285663],[113.99481121659123,22.60381079129223],[113.99481565952753,22.603806137576637],[113.99515576701069,22.603426136652367],[113.99549648383878,22.60304833084697],[113.99570726599393,22.60298417975627],[113.99623267681147,22.60298349183956],[113.99686127008054,22.603078201644227],[113.99770971150042,22.60339811537432],[113.9977201426685,22.603401409146592],[113.99773087118898,22.603403543871796],[113.99774176868631,22.603404494006192],[113.99787229266123,22.603408704456996],[113.99788215074415,22.603408536156227],[113.9978919443383,22.60340739789566],[113.99790157824009,22.603405300740327],[113.99791095879819,22.603402265076713],[113.9979199948241,22.603398320414538],[113.9979285984785,22.60339350509991],[113.99793668612513,22.60338786594256],[113.99794417914393,22.60338145776082],[113.9980199672584,22.603309880097154],[113.99802683618526,22.603302715227613],[113.99803296099675,22.603294904709315],[113.99803828135273,22.603286525489548],[113.99804274483841,22.603277660118295],[113.9980463074806,22.603268395934986],[113.99804893418107,22.603258824208055],[113.99810024403767,22.60302739683338],[113.99810134953593,22.603021608404344],[113.99816665521513,22.602614977726315],[113.99835030416712,22.60216721735362],[113.99856193554633,22.601842951121434],[113.99880470491176,22.601545730488308],[113.99881031760918,22.601538156502247],[113.99881519216395,22.60153008765145],[113.99881928525701,22.6015215956419],[113.99882256051407,22.601512755940064],[113.99882498882864,22.601503647102295],[113.9988265486209,22.601494350076678],[113.99882722602932,22.60148494748368],[113.9988344317295,22.601194082723367],[113.99895072783376,22.600790214181995],[113.9990602569799,22.600602634774226],[113.99921879840926,22.600476730796977],[113.99919877407567,22.60043325336671],[113.99912215529531,22.600408139732792],[113.99802751236375,22.600038565633355],[113.99775839514615,22.599792681543633],[113.99730187808832,22.598960946075003],[113.99590977592047,22.5977773063799],[113.99576459924215,22.59751983095157],[113.99543299558397,22.59717440812865],[113.9951938686417,22.5966914370548],[113.99501583215859,22.59639577584673],[113.99463229185628,22.596104860560743],[113.99420385593578,22.595969591352997],[113.99382768199821,22.59595993652297],[113.9938169603822,22.59596023674876],[113.99380633259398,22.59596168357378],[113.99379592089899,22.59596426035329],[113.99378584507669,22.595967937443213],[113.99321594303598,22.596211295714554],[113.99320787618828,22.59621517605677],[113.99320018866534,22.59621976224022],[113.99319294206812,22.596225017515316],[113.9931861944644,22.596230899770962],[113.99265363550316,22.596738860232236],[113.99200633643709,22.59716671060916],[113.99157366427197,22.5971462468509],[113.99090478252046,22.5969456920235],[113.99089489978897,22.59694326928491],[113.99088482201618,22.596941863390235],[113.9908746535454,22.596941488895837],[113.99086449965898,22.596942149679155],[113.99039476525739,22.596996829390125],[113.99038484213679,22.596998494112995],[113.99037513653565,22.597001147588333],[113.99036574671312,22.59700476295245],[113.99035676773141,22.597009303603546],[113.99034829049342,22.59701472357223],[113.99034040082233,22.597020967986946],[113.99033317859293,22.597027973629473],[113.99032669692278,22.59703566957495],[113.99032102143205,22.597043977909916],[113.99031620957922,22.597052814521092],[113.9903123100793,22.597062089946967],[113.99030936241067,22.59707171028347],[113.99020088374516,22.59750194984639],[113.99019873660492,22.597513104722935],[113.99019786842672,22.597524431141103],[113.99019829041364,22.59753578294312],[113.99030139387085,22.59862956838946],[113.99030286538937,22.59863964935582],[113.9903053549666,22.598649528285655],[113.99030883676294,22.59865910264432],[113.99048378356784,22.59907317753902],[113.99048795907763,22.599081866470787],[113.99049295183752,22.59909011297101],[113.99049871544861,22.599097840402962],[113.99050519634824,22.599104976953754],[113.99051233430787,22.599111456301692],[113.99052006299269,22.59911721823263],[113.99075599101839,22.599276010611053],[113.99076619844251,22.59928203412041],[113.99126127611241,22.599535900836155],[113.9917686585336,22.6000105337692],[113.99191211157755,22.60053218120178],[113.99183362959826,22.601016496848214],[113.99144872111891,22.60153952301182],[113.99077751816642,22.602118998056795],[113.99045237812743,22.602377905865616],[113.9904454049912,22.602384007276413],[113.99043902651476,22.60239072790739],[113.99010219314502,22.60332391993846]],

    geojson_line_1: [[113.99739584160139, 22.610765716856296], [113.99773288526481, 22.610577804306548], [113.99824514560808, 22.609808813574297], [113.99899240486543, 22.608186143427105], [113.99899684055141, 22.608138484311375], [113.99876376465981, 22.606584405046835], [113.9987454049567, 22.606539955896604], [113.9983737643716, 22.606046923598996], [113.99771305207776, 22.60586005946536], [113.996462081496, 22.60628164325351], [113.99540699384544, 22.60655007340282], [113.99537457846512, 22.606374521317747], [113.99533345805837, 22.60631869878032], [113.99491868014185, 22.60615102642152], [113.99446803578164, 22.605922922486105], [113.993628105381, 22.605432281601264], [113.99361283376653, 22.605399929510398], [113.99427914343141, 22.604297776694622], [113.99455101208882, 22.604066349285663], [113.99481121659123, 22.60381079129223], [113.99549648383878, 22.60304833084697], [113.99570726599393, 22.60298417975627], [113.99623267681147, 22.60298349183956], [113.99686127008054, 22.603078201644227], [113.9977201426685, 22.603401409146592], [113.99788215074415, 22.603408536156227], [113.99794417914393, 22.60338145776082], [113.9980463074806, 22.603268395934986], [113.99816665521513, 22.602614977726315], [113.99835030416712, 22.60216721735362], [113.99856193554633, 22.601842951121434], [113.99881928525701, 22.6015215956419], [113.9988344317295, 22.601194082723367], [113.99895072783376, 22.600790214181995], [113.9990602569799, 22.600602634774226], [113.99921879840926, 22.600476730796977], [113.99919877407567, 22.60043325336671], [113.99802751236375, 22.600038565633355], [113.99775839514615, 22.599792681543633], [113.99730187808832, 22.598960946075003], [113.99590977592047, 22.5977773063799], [113.99576459924215, 22.59751983095157], [113.99543299558397, 22.59717440812865], [113.9951938686417, 22.5966914370548], [113.99501583215859, 22.59639577584673], [113.99463229185628, 22.596104860560743], [113.99420385593578, 22.595969591352997], [113.99378584507669, 22.595967937443213], [113.99320018866534, 22.59621976224022], [113.99265363550316, 22.596738860232236], [113.99200633643709, 22.59716671060916], [113.99157366427197, 22.5971462468509], [113.99088482201618, 22.596941863390235], [113.99038484213679, 22.596998494112995], [113.99032102143205, 22.597043977909916], [113.99019829041364, 22.59753578294312], [113.99030286538937, 22.59863964935582], [113.99048378356784, 22.59907317753902], [113.99052006299269, 22.59911721823263], [113.99075599101839, 22.599276010611053], [113.99126127611241, 22.599535900836155], [113.9917686585336, 22.6000105337692], [113.99191211157755, 22.60053218120178], [113.99183362959826, 22.601016496848214], [113.99144872111891, 22.60153952301182], [113.99077751816642, 22.602118998056795], [113.99043902651476, 22.60239072790739], [113.99010219314502, 22.60332391993846]],

    geojson_line_2: [[113.991459678304494, 22.599604921099228], [113.991896923307195, 22.599936617485952], [113.992010569899804, 22.6005318195689], [113.991917242336896, 22.60102266627295], [113.991719622194296, 22.601431625928001], [113.991526274764496, 22.601612498395962], [113.992045849875581, 22.60262745159568], [113.992339522764453, 22.602968084896109], [113.992798857282978, 22.603280910653833], [113.99298710913483, 22.60350336409337], [113.993853067653333, 22.603677155592816], [113.994199451060737, 22.604268045049292], [113.993864148579476, 22.604784676421257], [113.993478403889895, 22.605480929778221], [113.995278497141001, 22.606402240970631], [113.995327766644706, 22.606673415602611], [113.996490585116902, 22.6063775771138], [113.997715653744606, 22.60596002561628], [113.998320711544395, 22.60613169032316], [113.998664870688501, 22.606599236851789], [113.998897946580101, 22.608153316116329], [113.998161891211794, 22.609753417676441], [113.9976555155949, 22.610514448689759], [113.997348907905405, 22.61067741494136]],

    bldg_geojson: {},

    gate_geojson: {},