Modified Quadratic Shepard

Author: A.Ringeler (c) 2003
Menu: Grid | Gridding | Interpolation

Description

Modified Quadratic Shepard method for grid interpolation from irregular distributed points. This tool is based on Tool 660 in TOMS.

References

Renka, R.J. (1988): QSHEP2D: Fortran routines implementing the Quadratic Shepard method for bivariate interpolation of scattered data. ACM TOMS 14, Classes E2b, Interpolation of scattered, non-gridded multivariate data, 149-150.

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Points	shapes, input	`POINTS`	-	-
Input	Target System	grid, input, optional	`TARGET_TEMPLATE`	use this grid's system for output grids	-
Output	Cross Validation Summary	table, output, optional	`CV_SUMMARY`	-	-
	Cross Validation Residuals	shapes, output, optional	`CV_RESIDUALS`	-	-
	Target Grid	grid, output	`TARGET_OUT_GRID`	-	-
Options	Attribute	table field	`FIELD`	-	-
	Cross Validation	choice	`CV_METHOD`	-	Available Choices: [0] none [1] leave one out [2] 2-fold [3] k-fold Default: 0
	Cross Validation Subsamples	integer number	`CV_SAMPLES`	number of subsamples for k-fold cross validation	Minimum: 2 Default: 10
	Target Grid System	choice	`TARGET_DEFINITION`	-	Available Choices: [0] user defined [1] grid or grid system Default: 0
	Cellsize	floating point number	`TARGET_USER_SIZE`	-	Minimum: 0.000000 Default: 1.000000
	West	floating point number	`TARGET_USER_XMIN`	-	Default: 0.000000
	East	floating point number	`TARGET_USER_XMAX`	-	Default: 100.000000
	South	floating point number	`TARGET_USER_YMIN`	-	Default: 0.000000
	North	floating point number	`TARGET_USER_YMAX`	-	Default: 100.000000
	Columns	integer number	`TARGET_USER_COLS`	Number of cells in East-West direction.	Minimum: 1 Default: 101
	Rows	integer number	`TARGET_USER_ROWS`	Number of cells in North-South direction.	Minimum: 1 Default: 101
	Rounding	boolean	`TARGET_USER_FLAT`	Round bounding coordinates to multiples of cell size. Ignored if cell size has decimal places.	Default: 1
	Fit	choice	`TARGET_USER_FITS`	-	Available Choices: [0] nodes [1] cells Default: 0
	Grid System	grid system	`TARGET_SYSTEM`	-	-
	Quadratic Neighbors	integer number	`QUADRATIC_NEIGHBORS`	-	Minimum: 5 Default: 13
	Weighting Neighbors	integer number	`WEIGHTING_NEIGHBORS`	-	Minimum: 3 Default: 19

Command Line


Usage: saga_cmd grid_gridding 4 [-POINTS ] [-FIELD ] [-CV_METHOD ] [-CV_SUMMARY ] [-CV_RESIDUALS ] [-CV_SAMPLES ] [-TARGET_DEFINITION ] [-TARGET_USER_SIZE ] [-TARGET_USER_XMIN ] [-TARGET_USER_XMAX ] [-TARGET_USER_YMIN ] [-TARGET_USER_YMAX ] [-TARGET_USER_COLS ] [-TARGET_USER_ROWS ] [-TARGET_USER_FLAT ] [-TARGET_USER_FITS ] [-TARGET_TEMPLATE ] [-TARGET_OUT_GRID ] [-QUADRATIC_NEIGHBORS ] [-WEIGHTING_NEIGHBORS ]
  -POINTS:                Points
	shapes, input
  -FIELD:                 Attribute
	table field
  -CV_METHOD:
                               Cross Validation
                               	choice
                               	Available Choices:
                               	[0] none
                               	[1] leave one out
                               	[2] 2-fold
                               	[3] k-fold
                               	Default: 0
  -CV_SUMMARY:            Cross Validation Summary
	table, output, optional
  -CV_RESIDUALS:          Cross Validation Residuals
	shapes, output, optional
  -CV_SAMPLES:            Cross Validation Subsamples
	integer number
	Minimum: 2
	Default: 10
  -TARGET_DEFINITION:
                               Target Grid System
                               	choice
                               	Available Choices:
                               	[0] user defined
                               	[1] grid or grid system
                               	Default: 0
  -TARGET_USER_SIZE:   Cellsize
	floating point number
	Minimum: 0.000000
	Default: 1.000000
  -TARGET_USER_XMIN:   West
	floating point number
	Default: 0.000000
  -TARGET_USER_XMAX:   East
	floating point number
	Default: 100.000000
  -TARGET_USER_YMIN:   South
	floating point number
	Default: 0.000000
  -TARGET_USER_YMAX:   North
	floating point number
	Default: 100.000000
  -TARGET_USER_COLS:      Columns
	integer number
	Minimum: 1
	Default: 101
  -TARGET_USER_ROWS:      Rows
	integer number
	Minimum: 1
	Default: 101
  -TARGET_USER_FLAT:      Rounding
	boolean
	Default: 1
  -TARGET_USER_FITS:      Fit
	choice
	Available Choices:
	[0] nodes
	[1] cells
	Default: 0
  -TARGET_TEMPLATE:       Target System
	grid, input, optional
  -TARGET_OUT_GRID:       Target Grid
	grid, output
  -QUADRATIC_NEIGHBORS:   Quadratic Neighbors
	integer number
	Minimum: 5
	Default: 13
  -WEIGHTING_NEIGHBORS:   Weighting Neighbors
	integer number
	Minimum: 3
	Default: 19