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PostgreSQL\par\sect\sected\sbknone\cols2\colno1\colw6110\colsr10\colno2\colw5780\pard\plain\sl-200\par\pard\plain\sl-274\par\pard\plain\li2689\sl-236\f0\fs20\cf0\b0\i0\ul0\strike0 Cheng\f0\fs20\cf0\b0\i0\ul0\strike0 Jiehai\par\pard\plain\li1191\sl-261\f0\fs18\cf0\b0\i0\ul0\strike0 School\f0\fs18\cf0\b0\i0\ul0\strike0 of\f0\fs18\cf0\b0\i0\ul0\strike0 Survey\f0\fs18\cf0\b0\i0\ul0\strike0 and\f0\fs18\cf0\b0\i0\ul0\strike0 Land\f0\fs18\cf0\b0\i0\ul0\strike0 Information\f0\fs18\cf0\b0\i0\ul0\strike0 Engineering\par\pard\plain\li2071\sl-223\f0\fs18\cf0\b0\i0\ul0\strike0 Henan\f0\fs18\cf0\b0\i0\ul0\strike0 Polytechnic\f0\fs18\cf0\b0\i0\ul0\strike0 University\par\pard\plain\li2665\sl-224\f0\fs18\cf0\b0\i0\ul0\strike0 Jiaozuo,\f0\fs18\cf0\b0\i0\ul0\strike0 China\par\pard\plain\li2399\sl-224\f0\fs18\cf0\b0\i0\ul0\strike0 [email protected]\par\pard\plain\sl-231\par\pard\plain\li1047\sl-193\f0\fs16\cf0\b\i\ul0\strike0 Abstract--\f0\fs16\cf0\b\i0\ul0\strike0 In\f0\fs16\cf0\b\i0\ul0\strike0 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1).\par\pard\plain\sl-200\par\pard\plain\sl-200\par\pard\plain\sl-200\par\pard\plain\sl-200\par\pard\plain\sl-200\par\pard\plain\sl-200\par\pard\plain\sl-200\par\pard\plain\sl-200\par\pard\plain\sl-200\par\pard\plain\sl-200\par\pard\plain\sl-328\par\pard\plain\li2053\sl-171\f0\fs14\cf0\b0\i0\ul0\strike0 Fig.1\f0\fs14\cf0\b0\i0\ul0\strike0 The\f0\fs14\cf0\b0\i0\ul0\strike0 three\f0\fs14\cf0\b0\i0\ul0\strike0 factors\f0\fs14\cf0\b0\i0\ul0\strike0 of\f0\fs14\cf0\b0\i0\ul0\strike0 mine\f0\fs14\cf0\b0\i0\ul0\strike0 spatial\f0\fs14\cf0\b0\i0\ul0\strike0 data\par\pard\column\plain\sl-200\par\pard\plain\sl-274\par\pard\plain\li1909\sl-236\f0\fs20\cf0\b0\i0\ul0\strike0 Li\f0\fs20\cf0\b0\i0\ul0\strike0 Wei\par\pard\plain\li156\sl-261\f0\fs18\cf0\b0\i0\ul0\strike0 School\f0\fs18\cf0\b0\i0\ul0\strike0 of\f0\fs18\cf0\b0\i0\ul0\strike0 Survey\f0\fs18\cf0\b0\i0\ul0\strike0 and\f0\fs18\cf0\b0\i0\ul0\strike0 Land\f0\fs18\cf0\b0\i0\ul0\strike0 Information\f0\fs18\cf0\b0\i0\ul0\strike0 Engineering\par\pard\plain\li1035\sl-223\f0\fs18\cf0\b0\i0\ul0\strike0 Henan\f0\fs18\cf0\b0\i0\ul0\strike0 Polytechnic\f0\fs18\cf0\b0\i0\ul0\strike0 University\par\pard\plain\li1629\sl-224\f0\fs18\cf0\b0\i0\ul0\strike0 Jiaozuo,\f0\fs18\cf0\b0\i0\ul0\strike0 China\par\pard\plain\li1482\sl-224\f0\fs18\cf0\b0\i0\ul0\strike0 [email protected]\par\pard\plain\sl-222\par\pard\plain\li279\sl-215\f0\fs18\cf0\b0\i0\ul0\strike0 The\f0\fs18\cf0\b0\i0\ul0\strike0 data\f0\fs18\cf0\b0\i0\ul0\strike0 of\f0\fs18\cf0\b0\i0\ul0\strike0 spatial\f0\fs18\cf0\b0\i0\ul0\strike0 location\f0\fs18\cf0\b0\i0\ul0\strike0 are\f0\fs18\cf0\b0\i0\ul0\strike0 a\f0\fs18\cf0\b0\i0\ul0\strike0 kind\f0\fs18\cf0\b0\i0\ul0\strike0 of\f0\fs18\cf0\b0\i0\ul0\strike0 non-structural\par\pard\plain\li0\sl-212\f0\fs18\cf0\b0\i0\ul0\strike0 data\f0\fs18\cf0\b0\i0\ul0\strike0 which\f0\fs18\cf0\b0\i0\ul0\strike0 can\u8217?t\f0\fs18\cf0\b0\i0\ul0\strike0 been\f0\fs18\cf0\b0\i0\ul0\strike0 completely\f0\fs18\cf0\b0\i0\ul0\strike0 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