第一節(jié) 全國(guó)GPS一、二級(jí)網(wǎng)
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全國(guó)GPS一、二級(jí)網(wǎng)是由總參測(cè)繪局建立(圖4-1)。一級(jí)網(wǎng)由45個(gè)點(diǎn)組成,較均勻地覆蓋了我國(guó)大陸和南海島嶼。除南海島嶼外,其他點(diǎn)均為國(guó)家天文大地網(wǎng)點(diǎn),同時(shí)是水準(zhǔn)點(diǎn)或水準(zhǔn)直接聯(lián)測(cè)點(diǎn),相鄰點(diǎn)間距離最大1667km,最短86km,平均點(diǎn)距約68 （共 736 字） [閱讀本文] >>

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全國(guó)GPS一、二級(jí)網(wǎng)是由總參測(cè)繪局建立(圖4-1)。一級(jí)網(wǎng)由45個(gè)點(diǎn)組成,較均勻地覆蓋了我國(guó)大陸和南海島嶼。除南海島嶼外,其他點(diǎn)均為國(guó)家天文大地網(wǎng)點(diǎn),同時(shí)是水準(zhǔn)點(diǎn)或水準(zhǔn)直接聯(lián)測(cè)點(diǎn),相鄰點(diǎn)間距離最大1667km,最短86km,平均點(diǎn)距約68 （共 736 字） <a id="quanwen" data-recordid="9570739" data-title="第一節(jié) 全國(guó)GPS一、二級(jí)網(wǎng)" href="javascript:void(0)"> [閱讀本文] >></a> </p> </div>  <div id="cmocquc" class="vipbox"> <img src="https://statics.zsbeike.com/statics2024/images/vipimg.png" class="vipimg"><span>開通會(huì)員，享受整站包年服務(wù)</span><a href="http://m.zhongyuanpingtai60.cn/index.php?m=payapi&c=depositnlogin&a=jinbeipay" class="activate">立即開通 >></a> </div>  </div> <div id="oceiyew" class="page_l_tj"> <div id="gyyiuis" class="p_title"> 推薦內(nèi)容 </div> <div id="ogiwiiq" class="con_box"> <ul> <li id="wksmscu" class="con_item"><a href="/kepu/9570712.html" target="_blank">GPS系統(tǒng)</a></li><li id="icyuisc" class="con_item"><a href="/kepu/9570713.html" 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