移动端地图离线状态下海量物探数据的存储检索与绘制方法

Storage,retrieval,and rendering method of massive geophysical data in a mobile map in the offline state

目前物探施工地点偏远、环境恶劣、区域复杂、设备众多,物探数据量大,而以往物探施工都是通过下发纸质文件结合GPS设备定位的方式来进行,施工效率低、管理不便。利用已有的第三方移动端地图软件导入离线业务数据存在软件不支持自有数据的离线导入,以及缺乏对海量数据进行优化处理致使移动端导入数据后彻底卡死、无法使用等问题。对此,提出移动端地图离线状态下海量物探数据的存储检索与绘制方法,利用嵌入式关系型数据库SQLite实现物探数据在移动端的离线存储;利用空间拓扑查询算法实现物探数据的高效检索;利用时间切片物探数据的高效绘制;利用缓存优化实现地图默认视角的优化。将此方法在东营某三维地震物探项目中进行实例应用,物探数据导入到移动端设备中进行地图的平移和缩放使用时,平均反应速度在1s以内,满足了项目中的使用要求。最终得到的移动端地图离线状态下海量物探数据的存储检索与绘制方法实现了物探施工现场海量数据离线存储与高效展示,具有非常重要的意义。

Presently,geophysical prospecting construction sites are remote,the environment is poor,the areas are complex,the equipment is numerous,and the amount of geophysical prospecting data is large.Previously,geophysical prospecting construction was being carried out by issuing paper documents combined with GPS equipment positioning,which was inefficient and inconvenient to manage.Using existing third-party mobile terminal map software to import offline business data has some problems,such as the software not supporting the offline import of its own data and a lack of optimization processing of massive data,which causes the mobile terminal to be completely blocked and become unusable after importing the data.In this regard,a method of storage,retrieval,and rendering of massive geophysical data in the offline state of the mobile terminal map was proposed here,and an embedded relational database SQLite was used to realize the offline storage of geophysical data in the mobile terminal.The efficient retrieval of geophysical data was realized by using a spatial topology query algorithm.Time slice geophysical data were efficiently rendered.Cache optimization was used to optimize the default view of the map.This method was applied in a 3D seismic geophysical exploration project in Dongying.When the geophysical data were imported into the mobile device for map translation and zooming,the average response speed was within 1 s,which met the requirements of the project.The storage,retrieval,and rendering method of massive geophysical data in the offline state of the mobile terminal map finally achieved offline storage and efficient display of massive geophysical data in the construction site,which has great significance.