GSP处理的是从全站仪中记录的三维坐标数据。一般的全站仪都有测量地形图的功能，记录地形点的坐标和点属性，文本格式为：
点号，X，Y，Z，点属性
如果您的记录格式不是这样的格式，请在全站仪中设置记录格式，或编辑转换成上述格式。
GSP要求在每一个新的断面开始时，在点属性中记录“CHA－0000”。其中“CHA－”表示新的断面测量开始，“0000”表示断面的中线里程，如果您不知到该断面的里程，请用“*”代替，GSP自动计算。这个点的坐标记录测站点的坐标。对于点号，GSP忽略。
以下为例：
0,2893106.665,472382.214,65.286,CHA-*
1,2893106.665,472382.214,65.286
2,2893106.929,472382.455,66.373
3,2893107.057,472382.572,68.472
4,2893106.851,472382.384,69.987
5,2893106.583,472382.139,70.936
6,2893106.063,472381.665,72.021
7,2893105.486,472381.138,72.931
8,2893104.894,472380.598,73.599
9,2893104.162,472379.93,74.207
10,2893103.252,472379.1,74.71
11,2893102.361,472378.286,74.968
12,2893101.337,472377.352,75.047
13,2893100.335,472376.437,74.832
14,2893099.249,472375.446,74.271
15,2893098.711,472374.956,73.823
16,2893098.156,472374.449,73.181
17,2893097.695,472374.029,72.49
18,2893097.231,472373.605,71.63
19,2893097.016,472373.409,71.111
20,2893096.785,472373.198,70.349
21,2893096.662,472373.086,69.726
22,2893096.517,472372.954,68.838
23,2893096.507,472372.944,67.577
24,2893096.598,472373.027,66.649
25,2893096.716,472373.136,65.95
26,2893096.855,472373.262,65.29
0,2893113.711,472375.106,65.591,CHA-*
1,2893113.711,472375.106,65.591
2,2893113.818,472375.203,66.509
3,2893113.752,472375.143,68.587
4,2893113.542,472374.952,70.045
5,2893113.079,472374.529,71.549
6,2893112.431,472373.938,72.672
7,2893111.807,472373.369,73.517
8,2893111.083,472372.708,74.211
9,2893110.13,472371.838,74.747
10,2893108.841,472370.662,75.049
11,2893107.77,472369.685,74.946
12,2893106.992,472368.975,74.689
13,2893105.698,472367.793,73.907
14,2893105.02,472367.175,73.226
15,2893104.259,472366.481,72.116
16,2893103.71,472365.98,70.847
17,2893103.377,472365.676,69.544
18,2893103.267,472365.576,68.188
19,2893103.305,472365.61,67.43
20,2893103.404,472365.7,66.637
21,2893103.538,472365.822,65.932
22,2893103.648,472365.924,65.35
0,2893120.53,472367.79,65.905,CHA-*
1,2893120.53,472367.79,65.905
2,2893120.572,472367.829,66.877
3,2893120.483,472367.748,68.961
4,2893120.222,472367.509,70.384
5,2893120.004,472367.311,71.087
6,2893119.628,472366.968,72.013
7,2893119.33,472366.696,72.575
8,2893118.961,472366.359,73.153
9,2893118.452,472365.895,73.731
10,2893117.715,472365.222,74.31
11,2893117.106,472364.666,74.655
12,2893116.441,472364.059,74.896
13,2893115.71,472363.393,75.02
14,2893115.108,472362.843,75.022
15,2893114.467,472362.258,74.908
16,2893113.782,472361.633,74.682
17,2893113.248,472361.145,74.415
18,2893112.743,472360.685,74.058
19,2893112.322,472360.301,73.68
20,2893111.877,472359.894,73.215
21,2893111.517,472359.566,72.691
22,2893111.148,472359.229,72.135
23,2893110.912,472359.014,71.661
24,2893110.679,472358.802,71.096
25,2893110.462,472358.604,70.385
26,2893110.32,472358.473,69.776
27,2893110.15,472358.318,68.933
28,2893110.1,472358.273,68.272
29,2893110.125,472358.296,67.737
30,2893110.251,472358.411,66.647
31,2893110.554,472358.687,66.013
0,2893126.977,472360.136,65.791,CHA-*
1,2893126.977,472360.136,65.791
2,2893127.072,472360.222,66.333
3,2893127.193,472360.333,66.841
4,2893127.216,472360.354,68.573
5,2893127.286,472360.418,69.536
6,2893126.902,472360.068,70.794
7,2893126.573,472359.767,71.802
8,2893125.995,472359.24,72.665
9,2893125.318,472358.622,73.542
10,2893124.758,472358.111,74.062
11,2893124.314,472357.706,74.576
12,2893123.622,472357.074,74.985
13,2893122.818,472356.34,75.273
14,2893121.78,472355.394,75.319
15,2893121.05,472354.727,75.157
16,2893119.864,472353.645,74.8
17,2893119.185,472353.025,74.224
18,2893118.17,472352.099,73.413
19,2893117.355,472351.356,72.001
20,2893116.803,472350.852,70.567
21,2893116.601,472350.667,69.027
22,2893116.848,472350.893,67.169
23,2893116.886,472350.928,66.013
