航空物探测量数据共享技术研究与应用

The study and application of sharing technology for aeromagnetic data

为了实现快速、有效地提供航空物探测量数据服务的目的,笔者针对航迹线数据的特点,研究道格拉斯-普克抽稀算法和地图优化配置技术,参照航空磁测技术规范对偏航距的要求,设定航迹上的坐标点抽稀阈值,在保证航迹基本保持不变的前提下,使坐标点数抽稀为原来的1%左右。并按测量比例尺对航迹线和测区进行分层,设定测区显示的最大比例尺和航迹线显示的最小比例尺,使大于一定测量比例尺显示时可以清晰地分辨航迹,而在小于一定测量比例尺时只显示测区图形。上述航迹线抽稀技术和地图优化配置技术的应用,使航迹线数据不必全部加载到计算机内存,大大加快了航迹线的浏览、检索速度,实现了快速、有效地提供数据服务的目的。

In order to realize aerogeophysical data service quickly and effectively,the authors studied the Douglas Peucker pumping dilute algorithm and map optimization configuration technology according to characteristics of the track line data. On the basis of the requirements of aeromagnetic survey technical specifications to the yaw pitch,the authors diluted the coordinates to about 1% of the original under the premise of ensuring the basic remain unchanged by setting the thinning thresholds. After the stratification of track line and test area by the measurement scale,the maximum scale of the test area and the minimum scale of the track line were set up,so that the tracks can be clearly distinguished when the scale is larger than a certain scale,and area graphics can be shown only when the scale is smaller than a certain measure. The application of the technology of the thin line extraction and map optimization makes it possible that track line data do not have to be loaded into the computer memory,which accelerates the search speed of the track line and can achieve a fast and effective way to provide flight route data services.