【摘要】：科研工作者在野外考察中經(jīng)常使用移動智能終端進行數(shù)據(jù)采集、人員活動跟蹤等工作。由于野外網(wǎng)絡信號差,且地處偏遠,部分區(qū)域會出現(xiàn)地圖缺失和地圖精度低的問題。為了補充低精度地區(qū)的地圖數(shù)據(jù),滿足缺失地圖區(qū)域的移動端離線使用需求,本文對自定義地圖的數(shù)據(jù)獲取、圖庫構建、離線存儲等相關技術進行了研究,提出了移動終端自定義地圖離線加載的解決方案。該方案首先使用開源軟件Mobile Atlas Creator下載缺失區(qū)域地圖,其次通過瓦片金字塔和瓦片系統(tǒng)規(guī)則構建地圖瓦片圖庫,最后依據(jù)MBTiles規(guī)范進行離線地圖瓦片存儲和展示。基于該方案生成的系統(tǒng)可獲取地圖資源,創(chuàng)建自定義地圖并提供離線功能,該系統(tǒng)不僅為地圖缺失地區(qū)提供了高清地圖,而且克服了海量數(shù)據(jù)在移動終端的存儲難關,大幅提高了離線地圖讀取速度,為科考工作順利開展提供重要地理信息。
[Abstract]:Researchers often use mobile intelligent terminals to collect data and track activities in the field. Because of the poor signal of field network and remote location, some areas will have the problems of missing map and low map precision. In order to supplement the map data of low-precision area and meet the need of mobile end off-line use in the missing map area, this paper studies some related technologies, such as data acquisition, map library construction, off-line storage and so on. The solution of mobile terminal custom map off-line loading is put forward. Firstly, the open source software Mobile Atlas Creator is used to download the missing area map. Secondly, the map tile library is constructed through the tile pyramid and the rules of tile system. Finally, the off-line map tile is stored and displayed according to the MBTiles specification. Based on this scheme, the system can obtain map resources, create custom map and provide off-line functions. The system not only provides high-definition map for map missing areas, but also overcomes the storage difficulties of mass data in mobile terminal. The speed of off-line map reading is greatly improved and important geographic information is provided for the smooth development of scientific research.
【作者單位】： 中國科學院大學;中國科學院計算機網(wǎng)絡信息中心;
【基金】：國家自然科學基金(61361126011)
【分類號】：N8;TP311.56
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本文編號：2322657