采集20个点(从3d 对应 googlemap)

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-23316，21620  ，36.235907,120.346763

差值：-23352.235907，21499.653237

-15844，6532   ，36.306104,120.377022

差值：-15880.306104，6411.622978

-8542 ，2648 ，36.306104,120.377022

差值： -8578.306104，2527.622978

11528，750  ，36.306104,120.377022

差值：11491.697181，629.622978

11540 ，7640 ，36.302819,120.500382

差值：11503.697181，7519.499618

15202 ，17482，36.252048,120.514673

差值：15165.747952，17361.485327

-14466， 10558 ，36.302819,120.500382

差值：-14502.302819，-120.500382

-454 ，13574 ， 36.279159,120.448562

差值：-490.279159，13453.551438

13822，23766，36.227663,120.517699

差值：13785.772337，23645.482301

18360 ，16986，36.253675,120.528234

差值：18323.746325，16865.471766

9390，10766  36.288643,120.488477

差值：9353.711357，10645.511523

1253，3408， 36.321083,120.390973

差值：1216.678917，3287.609027

-13638，10144，36.289888,120.387411

差值：-13674.289888，10023.612589

-9482 ，13448 ，36.275116,120.406415

差值：-9518.275116 ，13327.593585

-1181，14274 ， 36.268658,120.39638

差值：-1217.268658，14153.60362            

 

-2095， 10642 ， 36.275372,120.405792

差值：-2131.275372，10521.594208

-43230，21964 ， 36.233034,120.258451

差值：-43266.233034，21843.741549

-75508， 21476    ，36.23518,120.122194

差值：-75544.23518 ， 21355.877806

-76608，13310，36.289542,120.1158

差值：-76644.289542，13189.8842

-71940，34182，36.071462,120.170588

差值：-71976.071462，34061.829412

 

纬度最小值： -76644.289542            纬度最大值： 18323.746325

纬度中间值：= (-76644.289542+  18323.746325)/2 =-58320.543217

 

MD(纬度)=（34968.30731+42440.237113+49742.237113 +69812.240398 +69824.240398

 + 73486.291169+43818.240398 +57830.264058+ 72106.315554+76644.289542）

+（67674.254574+59537.222134+44646.253329+48802.268101+57103.274559

+56189.267845+15054.310183+17223.691963+18323.746325+13655.528245）/20

=49444.12401555

 

经度中间值：=（ -120.500382 + 34061.829412）/2 = 16970.664515

MD(经度)=(4528.988722+10559.041537+14443.041537+16341.041537+9451.164897

+ 390.820812+17091.164897+3517.113077+6674.817786+105.192749)

+(6325.152992+13683.055488+6947.051926+3643.07093+2817.060895)

+(6449.070307+4873.077034+|4385.213291+3780.780315+17091.164897)/20

=6837.80220445