GMT-Surfer函数

葡萄

surface -adjustable tension continuous curvature surface gridding algorithm。
表面曲率连续的可调整的曲面网格插值算法


surface [ xyzfile ] -Goutputfile.grd -Ixinc[unit][=|+][/yinc[unit][=|+]] -Rwest/east/south/north[r] [ -Aaspect_ratio ] [ -Cconvergence_limit ] [ -H[nrec] ] [ -Lllower ] [ -Luupper ] [ -Nmax_iterations ] [ -Q ] [ -Ssearch_radius[m] ] [ -Ttension_factor[i|b] ] [ -V[l] ] [ -Zover-relaxation_factor ] [ -:[i|o] ] [ -bi[s|S|d|D[ncol]|c[var1/...]] ] [ -fcolinfo ]


-G 输出文件名
-xinc/yinc: 给出插值后的网格间隔
-R：指定坐标范围
-A：
-Z：是插值的收敛标准
-L：强行指定解的范围
without any modifiers indicate that x is longitude and periodic in 360:
       -L constrain the range of output values:
       -Ll<limit> specifies lower limit; forces solution to be >= <limit>.
       -Lu<limit> specifies upper limit; forces solution to be <= <limit>.
        <limit> can be any number, or the letter d for min (or max) input data value, or the filename of a grdfile with bounding values. [Default solution unconstrained].
        Example: -Ll0 gives a non-negative solution.
-N sets max <n_iterations> in each cycle; default = 250.
设置每个圆的最大迭代数
-S 除非网格是病态的
sets <search_radius> to initialize grid; default = 0 will skip this step.
            This step is slow and not needed unless grid dimensions are pathological;
            i.e., have few or no common factors.Append m to give <search_radius> in minutes.


-T adds Tension to the gridding equation; use a value between 0 and 1.
           default = 0 gives minimum curvature (smoothest; bicubic) solution.
                     1 gives a harmonic spline solution (local max/min occur only at data points).
                     typically 0.25 or more is good for potential field (smooth) data;0.75 or so for topography. Experiment.
           Append B or b to set tension in boundary conditions only;
           Append I or i to set tension in interior equations only;
关系到插值的结果？详情见cookboo 6.16图
-Z sets <over_relaxation parameter>. Default = 1.4
      Use a value between 1 and 2. Larger number accelerates convergence but can be unstable.
      Use 1 if you want to be sure to have (slow) stable convergence.
控制收敛速度