GMT-Surfer函数
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[=|+][=|+]] -Rwest/east/south/north [ -Aaspect_ratio ] [ -Cconvergence_limit ] [ -H ] [ -Lllower ] [ -Luupper ] [ -Nmax_iterations ] [ -Q ] [ -Ssearch_radius ] [ -Ttension_factor ] [ -V ] [ -Zover-relaxation_factor ] [ -: ] [ -bi|c] ] [ -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. .
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
页:
[1]