Contour Lines from Grid

Author: O.Conrad (c) 2001
Menu: Shapes | Grid | Vectorization

Description

Derive contour lines (isolines) from a grid.

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Grid	grid, input	`GRID`	-	-
Output	Contour	shapes, output	`CONTOUR`	-	-
Output	Polygons	shapes, output, optional	`POLYGONS`	-	-
Options	Grid system	grid system	`GRID_GRIDSYSTEM`	-	-
	Vertex Type	choice	`VERTEX`	-	Available Choices: [0] x, y [1] x, y, z Default: 0
	Parallel Processing	boolean	`LINE_OMP`	-	Default: 1
	Split Line Parts	boolean	`LINE_PARTS`	-	Default: 1
	Parallel Processing	boolean	`POLY_OMP`	-	Default: 1
	Split Polygon Parts	boolean	`POLY_PARTS`	-	Default: 1
	Coordinate Precision Fix	boolean	`PRECISION`	Check to avoid coordinate precision issues with polygon construction, particularly helpful with geographic coordinates or in general with comparatively small cell sizes.	Default: 0
	Interpolation Scale	floating point number	`SCALE`	set greater one for line smoothing	Minimum: 0.000000 Default: 1.000000
	Boundary Extension	boolean	`BOUNDARY`	Extend contours beyond boundary. Internally input grid is extrapolated by one cell size in each direction (top, down, left, right).	Default: 0
	Minimum Length	floating point number	`MINLENGTH`	Contour line segments with minimum length [map units] or less will be removed from resulting data set.	Minimum: 0.000000 Default: 0.000000
	Interval Definition	choice	`INTERVALS`	-	Available Choices: [0] single value [1] equal intervals [2] from list Default: 1
	Base Contour Value	floating point number	`ZMIN`	-	Default: 0.000000
	Maximum Contour Value	floating point number	`ZMAX`	-	Default: 1000.000000
	Contour Interval	floating point number	`ZSTEP`	-	Minimum: 0.000000 Default: 100.000000
	Contour Values	text	`ZLIST`	List of comma separated values.	Default: 0, 10, 20, 50, 100, 200, 500, 1000

Command Line


Usage: saga_cmd shapes_grid 5 [-GRID ] [-CONTOUR ] [-VERTEX ] [-LINE_OMP ] [-LINE_PARTS ] [-POLYGONS ] [-POLY_OMP ] [-POLY_PARTS ] [-PRECISION ] [-SCALE ] [-BOUNDARY ] [-MINLENGTH ] [-INTERVALS ] [-ZMIN ] [-ZMAX ] [-ZSTEP ] [-ZLIST ]
  -GRID:           Grid
	grid, input
  -CONTOUR:        Contour
	shapes, output
  -VERTEX:         Vertex Type
	choice
	Available Choices:
	[0] x, y
	[1] x, y, z
	Default: 0
  -LINE_OMP:       Parallel Processing
	boolean
	Default: 1
  -LINE_PARTS:     Split Line Parts
	boolean
	Default: 1
  -POLYGONS:       Polygons
	shapes, output, optional
  -POLY_OMP:       Parallel Processing
	boolean
	Default: 1
  -POLY_PARTS:     Split Polygon Parts
	boolean
	Default: 1
  -PRECISION:      Coordinate Precision Fix
	boolean
	Default: 0
  -SCALE:       Interpolation Scale
	floating point number
	Minimum: 0.000000
	Default: 1.000000
  -BOUNDARY:       Boundary Extension
	boolean
	Default: 0
  -MINLENGTH:   Minimum Length
	floating point number
	Minimum: 0.000000
	Default: 0.000000
  -INTERVALS:
                        Interval Definition
                        	choice
                        	Available Choices:
                        	[0] single value
                        	[1] equal intervals
                        	[2] from list
                        	Default: 1
  -ZMIN:        Base Contour Value
	floating point number
	Default: 0.000000
  -ZMAX:        Maximum Contour Value
	floating point number
	Default: 1000.000000
  -ZSTEP:       Contour Interval
	floating point number
	Minimum: 0.000000
	Default: 100.000000
  -ZLIST:          Contour Values
	text
	Default: 0, 10, 20, 50, 100, 200, 500, 1000