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RSS订阅转载 抛物线插值法
抛物线插值法(parabolic interpolation method)亦称二次插值法，是一种多项式插值法，逐次以拟合的二次曲线的极小点，逼近原寻求函数极小点的一种方法。具体做法是：设f(t)在t1<t2<t3处的函数值依次为f(t1)，f(t2)和f(t3)，用抛物线φ(t)=a0+a1t+a2t²拟合f(t)，使满足φ(ti)=a0+a1ti+a2ti²(i=1,2,3)组...
2019-03-14 09:52:25
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关于gis几何变化的文章
Geometric conflation is the process undertaken to modify the coordinates of features in dataset A in order to match corresponding ones in dataset B. The overwhelming majorityof the literature considers the use of points as features to define the transformation. In this article we present a procedure to consider one-dimensional curves also, which
are commonly available as Global Navigation Satellite System (GNSS) tracks, routes,coastlines, and so on, in order to define the estimate of the displacements to be applied to each object in A. The procedure involves three steps, including the partial matching of corresponding curves, the computation of some analytical expression, and the
addition of a correction term in order to satisfy basic cartographic rules. A numerical example is presented.
2015-06-08
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