Interpolation of DTM using bi-directional third-degree parabolic equations, with FORTRAN subroutines

被引：10

作者：

Doytsher, Y ^{[1
]}

Hall, JK

机构：

[1] Technion Israel Inst Technol, Dept Civil Engn, IL-32000 Haifa, Israel

[2] Geol Survey Israel, Marine Geol Mapping & Tecton Div, IL-95501 Jerusalem, Israel

[3] Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, IL-84993 Sede Boqer, Israel

来源：

COMPUTERS & GEOSCIENCES | 1997年 / 23卷 / 09期

关键词：

digital terrain model (DTM); digital elevation model (DEM); interpolation; parabolic blending functions; surface normal; dip and strike; surface slope; FORTRAN;

D O I：

10.1016/S0098-3004(97)00061-7

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

An algorithm is developed for smooth interpolation within the square or rectangular-grid cells of a digital terrain model (DTM) using bi-directional third-degree parabolic blending functions. Two FORTRAN subroutines are given. The first performs integral subdivision of the DTM. The second interpolates a single point anywhere inside a DTM cell, also providing the slopes in the x and y direction as well as the dip and strike at that point. Provisions are made in all situations for interpolation within the outer cells of the DTM. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：1013 / 1020

页数：8

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