求助GS-84坐标系坐标的换算办法

一知某公司提供的电子地图产品(954年北京坐标系),二知GPS测得的经纬度(GS-84坐标系坐标)有谁能求解出其中的换算办法啊,是否能提供某种换算工具啊?具体坐标见附件.

纬度           经度           X             Y<BR>34.43433  119.32209  713385.44201  3814337.13066 <BR>34.43714  119.32199  713369.09888  3814648.72372 <BR>34.43709  119.32203  713372.90333  3814643.25975 <BR>34.43729  119.32226  713393.53952  3814665.93725 <BR>34.43711  119.32173  713345.27182  3814644.84685 <BR>34.43711  119.32149  713323.20748  3814644.34085 <BR>34.43723  119.32178  713349.56326  3814658.26774 <BR>34.42240  119.38412  719119.58936  3813145.84759 <BR>34.41801  119.40618  721159.64896  3812706.67708 <BR>34.41743  119.40610  721153.82093  3812642.14284 <BR>34.41729  119.40581  721127.52163  3812625.97457 <BR>34.45135  119.47720  727600.08769  3816563.71915 <BR>34.45135  119.47723  727602.84548  3816563.78663 <BR>34.45134  119.47721  727601.03411  3816562.63194 <BR>34.42124  119.50690  730412.94986  3813289.69915 <BR>34.42129  119.50669  730393.50152  3813294.76960 <BR>34.45433  119.54599  733915.24754  3817051.31840 <BR>34.45420  119.54608  733923.88331  3817037.10068 <BR>34.45411  119.54585  733902.99254  3817026.58149 <BR>34.45312  119.54643  733959.07146  3816918.06324 <BR>34.45311  119.54644  733960.01863  3816916.97664 <BR>34.45405  119.54400  733733.10379  3817015.64733 <BR>34.45405  119.54399  733732.18454  3817015.62423 <BR>34.37867  119.61446  740425.89960  3808815.73158 <BR>34.37346  119.60083  739186.67710  3808205.32883 <BR>34.37351  119.60088  739191.13532  3808210.99543 <BR>34.33787  119.54277  733943.46929  3804120.51613 <BR>34.33770  119.54269  733936.57777  3804101.46705 <BR>34.33784  119.54318  733981.29283  3804118.13251 <BR>34.29942  119.24878  706977.32680  3799215.53317 <BR>34.25148  119.23876  706171.75362  3793875.86169 <BR>34.25146  119.23883  706178.25193  3793873.78435 <BR>34.25146  119.23902  706195.75789  3793874.16975 <BR>34.25199  119.23887  706180.64341  3793932.67274 <BR>34.25100  119.23884  706180.29654  3793822.76451 <BR>34.25141  119.23857  706154.41850  3793867.70944 <BR>34.27714  119.34623  716008.13746  3796946.21398 <BR>34.27723  119.34628  716012.51278  3796956.30664 <BR>34.27717  119.34629  716013.58749  3796949.67038 <BR>34.27710  119.34631  716015.60896  3796941.94543 <BR>34.28927  119.44281  724872.00542  3798501.71632 <BR>34.28925  119.44280  724871.13772  3798499.47486 <BR>34.28909  119.44300  724889.98466  3798482.16341 <BR>34.28915  119.44333  724920.21766  3798489.55206 <BR>34.28916  119.44336  724922.95408  3798490.72813 <BR>34.28888  119.44341  724928.30593  3798459.76876 <BR>34.28929  119.44299  724888.53011  3798504.33399 <BR>34.31146  119.45248  725703.18630  3800985.45586 <BR>34.31159  119.45256  725710.20418  3801000.05908 <BR>34.31160  119.45254  725708.33582  3801001.12431  <BR>34.31164  119.15242  698075.44824  3800379.26922 <BR>34.31111  119.45250  725705.96550  3800946.66300 <BR>34.34661  119.45637  725967.00382  3804894.51529 <BR>34.34668  119.45641  725970.49724  3804902.37211 <BR>34.34697  119.45647  725975.24076  3804934.68550 <BR>34.34704  119.45620  725950.20251  3804941.85168 <BR>34.30492  119.35099  716375.28694  3800038.83487 <BR>34.33187  119.33196  714554.33437  3802988.84473 <BR>34.33209  119.33191  714549.17122  3803013.15052 <BR>34.33194  119.33271  714623.19412  3802998.19788 <BR>34.33194  119.33273  714625.03519  3802998.24017 <BR>34.29909  119.24922  707018.65453  3799179.81393 <BR>34.29923  119.24904  707001.73536  3799194.98115 <BR>34.29948  119.24922  707017.69655  3799223.08754 <BR>34.30047  119.24939  707030.91937  3799333.28238 <BR>34.30114  119.24934  707024.66979  3799407.52263 <BR>34.30188  119.24944  707032.06030  3799489.83520 <BR>34.30226  119.24936  707023.76050  3799531.83651 <BR>34.30351  119.24944  707028.05657  3799670.69702 <BR>34.30416  119.24949  707031.06405  3799742.92185 <BR>34.30423  119.24950  707031.81272  3799750.70921 <BR>34.30520  119.24930  707011.01429  3799857.93096 <BR>34.30566  119.24924  707004.35993  3799908.84964 <BR>34.30578  119.24921  707001.30288  3799922.10325 <BR>34.30680  119.24895  706974.85749  3800034.75088 <BR>34.30430  119.24407  706531.65128  3799747.42073 <BR>34.30228  119.24423  706551.33428  3799523.61083 <BR>34.30083  119.24425  706556.72909  3799362.76261 <BR>34.30080  119.24429  706560.48601  3799359.51510 <BR>34.30073  119.24429  706560.65749  3799351.74814 <BR>34.30026  119.24431  706563.65084  3799299.63835 <BR>34.29799  119.21970  704302.98466  3798997.99157 <BR>34.29806  119.22138  704457.51850  3799009.13884 <BR>34.29808  119.22311  704616.77762  3799014.84133 <BR>34.29813  119.22359  704660.85723  3799021.35635 <BR>34.29807  119.22688  704963.96387  3799021.33234 <BR>34.29815  119.22849  705112.02706  3799033.45887 <BR>34.29811  119.23023  705272.35306  3799032.53541 <BR>34.29823  119.23203  705437.81453  3799049.48939 <BR>34.29834  119.23491  705702.75218  3799067.52319 <BR>34.29836  119.23546  705753.35050  3799070.85629 <BR>34.39829  119.23589  705548.68485  3810159.80783 <BR>34.29829  119.23606  705808.77260  3799064.30478 <BR>34.29832  119.23671  705868.55482  3799068.95065 <BR>34.29831  119.23746  705937.64324  3799069.36146 <BR>34.29834  119.23832  706016.76340  3799074.43393 <BR>34.29846  119.23964  706138.02300  3799090.42697 <BR>34.29854  119.24068  706233.59603  3799101.41482 <BR>34.29857  119.24198  706353.23333  3799107.38360 <BR>34.29845  119.24299  706446.53334  3799096.12083 <BR>34.29842  119.24323  706468.70741  3799093.27997 <BR>34.29864  119.24434  706570.38322  3799119.94744 <BR>34.29868  119.24553  706679.86669  3799126.80672 <BR>34.29880  119.24618  706739.42782  3799141.44438 <BR>34.29883  119.24751  706861.82737  3799147.48074 <BR>34.29878  119.24799  706906.15089  3799142.91063 <BR>34.29893  119.24874  706974.84653  3799161.08228 <BR>

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<P>可用该方法求得的坐标与实际并不一致啊?</P>