rsaga.inverse.distance(RSAGA)
rsaga.inverse.distance()所属R语言包:RSAGA
Spatial Interpolation Methods
空间插值方法
译者:生物统计家园网 机器人LoveR
描述----------Description----------
Spatial interpolation of point data using inverse distance to a power (inverse distance weighting,
空间插值点数据使用到电源逆距离(距离倒数加权,
用法----------Usage----------
rsaga.inverse.distance(in.shapefile, out.grid, field,
power = 1, maxdist = 100, nmax = 10,
target = rsaga.target(), env = rsaga.env(), ...)
rsaga.nearest.neighbour(in.shapefile, out.grid, field,
target = rsaga.target(), env = rsaga.env(), ...)
rsaga.modified.quadratic.shephard(in.shapefile, out.grid, field,
quadratic.neighbors = 13, weighting.neighbors = 19,
target = rsaga.target(), env = rsaga.env(), ...)
参数----------Arguments----------
参数:in.shapefile
Input: point shapefile (default extension: .shp).
输入点坐标(默认扩展名:.shp)。
参数:out.grid
Output: filename for interpolated grid (SAGA grid file). Existing files will be overwritten!
输出:插值网格(SAGA的网格文件)的文件名。现有的文件将被覆盖!
参数:field
numeric(!): number (not name!) of attribute in the shapefile's attribute table to be interpolated; the first attribute is represented by a zero.
数值(!):为要插补的shapefile的属性表中的属性的数目(未名字!)的第一个属性表示的一个零。
参数:power
numeric (>0): exponent used in inverse distance weighting (usually 1 or 2)
数值(> 0):指数中使用的反距离加权(通常为1或2)
参数:maxdist
numeric: maximum distance of points to be used for inverse distance interpolation (search radius)
数值:最大的点的距离要用于距离倒数插值(搜索半径)
参数:nmax
Maximum number of nearest points to be used for interpolation
最近点的最大数目,用于内插
参数:quadratic.neighbors
integer >=5; ??
整数> = 5;?
参数:weighting.neighbors
integer >=3; ??
整数> = 3;?
参数:target
list: parameters identifying the target area, e.g. the lower left corner and size of grid, or name of a reference grid; see rsaga.target.
列表:识别该目标区域的参数,例如左下角和网格的大小,或名称的基准格见rsaga.target。
参数:env
RSAGA geoprocessing environment created by rsaga.env, required because module(s) depend(s) on SAGA version
RSAGA rsaga.env,需要创建的GEO处理环境,因为模块(S)依赖()SAGA版本的
参数:...
Optional arguments to be passed to rsaga.geoprocessor, including the env RSAGA geoprocessing environment.
可选参数被传递给rsaga.geoprocessor,包括env RSAGAGEO处理环境。
Details
详细信息----------Details----------
Inverse distance weighting (IDW) uses module 0 in the SAGA library grid_gridding. Nearest neighbour interpolation uses module 1, and triangulation
反距离权重法(IDW)使用模块0在SAGA库grid_gridding中。最近邻插值采用模块1,和三角
注意----------Note----------
The 'Inverse Distance Weighted' module of SAGA GIS (library 'grid_gridding') has changed from SAGA GIS 2.0.4 to 2.0.5. The module now not only support inverse-distance weighted interpolation, but also exponential and other weighting schemes (command line argument WEIGHTING); these are however not accessible through this function, but only through the rsaga.geoprocessor. See rsaga.get.usage("grid_gridding","Inverse Distance Weighted") for details. This R function furthermore only interfaces the local version of IDW, which uses a local search radius (argument 'radius'); the SAGA module now (2.0.5) also supports global IDW.
的“反距离加权”模块的SAGA GIS(库grid_gridding“)已经从SAGA GIS 2.0.4到2.0.5。现在该模块不仅支持反距离权重插值,但也加权指数和其他计划(命令行参数的权重);然而,这些都是可以通过此功能,但只能通过rsaga.geoprocessor。见rsaga.get.usage("grid_gridding","Inverse Distance Weighted")的详细信息。这个R的功能,而且只有接口IDW的本地版本,它采用了本地搜索半径(半径“参数”); SAGA模块(2.0.5)也支持全球IDW。
See the example section in the help file for write.shapefile in package shapefiles to learn how to apply these interpolation functions to a shapefile exported from a data.frame.
在帮助文件中的示例部分write.shapefile在包shapefiles学习如何应用这些插值函数到shapefile出口数据框。
Modified Quadratic Shephard method: based on module 660 in TOMS (see references).
改进二次谢泼德方法:根据模块660中TOMS(请参阅参考资料)。
(作者)----------Author(s)----------
Alexander Brenning (R interface), Andre Ringeler and Olaf Conrad (SAGA modules)
参考文献----------References----------
method for bivariate interpolation of scattered data (see R. J. Renka, ACM TOMS 14 (1988) pp.149-150). Classes: E2b. Interpolation of scattered, non-gridded
参见----------See Also----------
rsaga.ordinary.kriging, and idw in package
rsaga.ordinary.kriging和idw的包
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注:
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