echarts的地图数据

Question

    "id": "450500",
    "type": "Feature",
    "geometry": {
        "type": "MultiPolygon",
        "coordinates": [
            ["@@BRDDHDBGEMAEEAAD"],
            ["@@@`EZ@HHHFLvZTDVILQBSCMM[EQGECCEBEDIBKNGBKECGDGHG@GCCG@IFMN"],
            ["@@ALBHDBDBNGFEDEBIIIE@IDGL"],
            ["@@ACDAAE@EGOIIBC@CGMCABKEEGCAKC@@CBEFC@EA@EKHEBAC@DACIDCD@HMACCCBADADEEE@A@GDGAKfqC_FQJKJGJM@I@SES@SSB_ES@{HaHmTeXQTY‚Q^SRUPUDUCQGCIEAoSasU³Y‰UGčGOKAMBiCIMSQcOwUoI]@QFlYRYJSDOBWGMBEFELCV@PHZJLVVbR¦XdVJLFLDbCTEPGLGFMFQDIAGCIAUHEDCLC@ÝNoDsAyDmN[PadwGTAPERBbBVFTJZNLLDN@PGJANFRRDBRAHBRLJBFHFCHA@DAHBABBBNBBHD@DCD@BLDABEBBBADFDABFBCDDBB@@EB@DF@FL@@FC@@@CFJH@BCBBFCBC@GEEB@LAJBDJ@FFJDFA@BCB@DDBFABECCGCECDEFKFBAHFB@HFF@DAB@BJABB@FDBBEB@HDDFDCB@BHT@DABBDA@AB@DALB\\PTARINANDbZJXJPTFTETST[PETBFJVBxATBVBPCXBp\\LPBFGD@@DLCF@HD@FEHC@HBBHAL@@BCFAFCFDJEDA@@GE@AHADBDBBBAH@DALHBKLED@ADGDBD@FDAFE@JDDBAAEDEACD@BDDACIFIDAHBCDEFB@DDLABA@CFAAMACCACE@ADED@B@DFHB@HH@@IFDDJAJNJBHNBFEH@BGLEDEH@BEBAD@@DHFLBZEBA@AEEBAJBB@AFDTAJBBBBJ@RCNABCD@DBBJHBFNFBLAPG@GAGFUHADEFALGDCNBFDDH@RDBFBFAFABADWFINGH@JB@CDABCFBBCJ@DEDFFABFJN@FCFD@FABBDFABD@ADBDD@ADFFBEHABAF@ACB@FFFAHELFDETFBFDBBDD@@DFDADG@@FNANFBCH@BELADBDGLCHMFBFABFAFDDHDTDXGPMFCHB@BHBD@BEL@\\NFBDMFBFEBCCC@QAEFCACBCECBCCCBCMGNKCABCB@JK@IAADCAAGMWODSVGHQGOAQMiCW@G@CCABCCCBIEI@CLA@C@IDKCMBKMOAI@GLQ@IDIFELCBEBDAFDADDFADDBFLDDA@EH@@CBCF@FEACBCHHH@BABEBGF@HHBHHHBFDCF@FB"]
        ],

以上是一部分地图数据，coordinates里的这些数据本来该是点的经纬度数组吧？这种@@什么的数据是不是压缩出来的，在什么场合用，用什么工具压缩的？
前端不懂~请指教！