利用3S技术更新山东1∶25万地形数据库

Renew Landform Database with the Scale of 1∶250000 by Us ing 3S Technology

摘要:

国家1∶25万地形数据库的更新是一项十分复杂的系统工程,本文就如何利用3S技术更新山东1∶25万地形数据库的作业方法和技术流程进行了简要论述。其目的是采用3S技术快速有效地更新1∶25万地形数据库。通过对1∶25万地形数据库的要素更新需求和数据源更新分析,提出利用卫星影像既可以保证现势性、又能保证精度。如果选用地面分辨率更高的卫星影像,就可以采用此方法更新1∶5万、1∶1万地形图。随着GPS的应用普及和精度的提高,动态GPS和手持GPS将广泛应用于各种比例尺地形图的更新。事实证明广泛的利用3S技术挖掘地理信息发展的成果,能以更快的速度和更高的精度保证各种比例尺地形图的现势性,满足经济发展的需要。

Abstract:

Through analysis on element renew demand and data sou rc e renew of landform database with the scale of 1∶250000, it is put forward that present condition and precision can be issurred if satellite image is used. If satellite image with high ground discernibility is selected, landform maps with the scale of 1∶50000 and 1∶10000 will be renewed by using this method. It is p roved that present condition of all scales of maps will be issurred with rapid s peed and high precision by using 3S achievements, which can meet the demand of r apid developments of economy.