GIS数字曲线复杂性的度量与误差建模中趋势项的分离

基金项目: 测绘遥感信息工程国家重点实验室开放研究基金资助项目。

详细信息

On Measuring Complexity of Digital Curves and Separating Stochastic Part from Trend Movement of Digitizing Process

School of Geo-science and Surveying Engineering. WTUSM. 39 Luoyu Road. Wuhan. China, 430070

摘要: 引入了衡量GIS数字曲线复杂性的四种指标,提出了误差建模中趋势项分离的样条函数法,考察了分离一组具有不同复杂度模拟曲线的有效性,并与差分法进行了比较。
- 数字曲线 /
- 复杂性 /
- 趋势项 /
- 样条函数
Abstract: After tile digitizing process,cartographic curves become broken lines,which are called digital curves.The complexity of the digital curves could be measured by their curvature.Separation of stochastic part from trend movement of digitizing process could be realized by using the spline approximating approach.Validity check of this method has been conducted by employing several curves with different curvatures.
- digital curves /
- complexity /
- trend movement /
- spline function