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(sh)ϺgϢA(ch)(sh)(j)ƽ_(ti)O(sh)Ҏ(gu)о

r(sh)g2023-05-01 11:15:00 ͨՓ ҪͶ
  • P(gun)]

(sh)ϺgϢA(ch)(sh)(j)ƽ_(ti)O(sh)Ҏ(gu)о

һ(sh)ֳС䑪(yng)õĬF(xin)

1(gu)⡰(sh)ֳСA(ch)ƽ_(ti)O(sh)ĬF(xin)

(sh)ϺgϢA(ch)(sh)(j)ƽ_(ti)O(sh)Ҏ(gu)о

1 g(sh)(j)a(chn)ʹõąf(xi){(dio)͹

1994413գ(gu)C12906̖(ho)y(tng)(sh)ʩ(gu)ҿg(sh)(j)A(ch)O(sh)ʩNational Spatial Data Infrustructure NSDIӋ(j)ʽ(gu)ͷT(mn)_(ki)չֱӅf(xi){(dio)g(sh)(j)ռ͹Ļ(dng)

Ӣ(gu)J(rn)R(sh)ͷ(gu)NSDIɹ͆(wn)}ĻA(ch)ˇ(gu)ҵg(sh)(j)ܣNGDFl(f)չӋ(j)

Ĵ“(lin)g(sh)(j)ίT(hu)ƶ˿g(sh)(j)C(j)(gu)cI(lng)(do)C(j)(gu)ę(qun)c؟(z)“(lin)g(sh)(j)D(zhun)׌

2 g(sh)(j)ܽO(sh)

(gu)FGDC19954NDGDF(sh)ʩӋ(j)_(ki)ʼ؜y(c)(sh)Ӱ(sh)ָ߳ģͨ͡ˮԪԼõ؉Kؼ?dng)?sh)(j)ڃ(ni)Ĕ(sh)(j)ܡ

ôGeomatics Canadaؓ(f)؟(z)ȫô(gu)ҵΔ(sh)(j)(k)NTDBѽ(jng)125f(wn)Δ(sh)(j)(k)ϲ˿ڳܵ؅^(q)15f(wn)Δ(sh)(j)(k)

W޴(sh)(gu)ҰD^С(sh)ֵg(sh)(j)a(chn)A(ch)^áӢ(gu)܊y(c)֏1970_(ki)ʼ”(sh)ֻƈDʽ(hu)ṩ(sh)ֻ؈D

(gu)Ժ198515f(wn)ȫ(gu)Δ(sh)(j)(k)BDTOPOxyȞ2.5mzȞ1.0m

‡(gu)(ni)(w)ԭ؜y(c)оIFAGؓ(f)؟(z)ȫ(gu)120f(wn)DLM1100f(wn)DKMݜy(c)ؓ(f)؟(z)1:2.5f(wn)DLM1:2.5f(wn)DKMᆱҪ3m

m1990꽨˵ؼϢLjDΣ“(lin)W(wng)ԃ(xn)2500ע(c)Ñ(h)1997ȫ(gu)ؼD(sh)ֻ

ձǁ޵؅^(q)_(ki)չϢć(gu)Ŀǰ(hu)ṩDEM (sh)ֵ؈DϵЮa(chn)Ʒ

3 g(sh)(j)(bio)(zhn)O(sh)

l(f)_(d)(gu)ҵĵϢÇ(gu)Һ͵طɼ(j)wϵڡ(sh)ֳСg(sh)(j)A(ch)ƽ_(ti)ĽO(sh),ͨ϶µĽMʽMP(gun)C(j)(gu)ͬƄ(dng)ȫ(gu)y(tng)һ(sh)(j)ƽ_(ti)ĽO(sh)Ҫ𵽅f(xi){(dio)„(w)Mоl(f)չy(tng)һ(sh)(j)(bio)(zhn)ИI(y)Ҏ(gu)á

2(gu)(ni)(sh)ֳСA(ch)ƽ_(ti)O(sh)ĬF(xin)

҇(gu)ʮ塱Ӌ(j)_M(jn)(gu)(jng)(j)(hu)ϢǸwF(xin)O(sh)ȫֵđ(zhn)e롣Ϣ(dng)I(y)l(f)]l(f)(yu)(sh)(sh)F(xin)(hu)a(chn)ĿԽʽl(f)չM(jn)Ϣһ(g)Ҫ棬hĸ(j)I(lng)(do)(du)(sh)ֵ򡱽o˸߶ҕ

199911׌á(sh)ֵ򡱇(gu)H(hu)hϣL(zhng)ʽˆ(dng)(sh)ֱ̡2000Ϣkƶˡ?dng)?sh)ֱ

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