RAS2LINE

Description

RAS2LINE converts a raster layer to a line layer.

Parameters

Name	Type	Caption	Length	Value range
FILI *	String	Input file name	1 - 192
DBIC *	Integer	Input raster channel	1 - 1
FILO *	String	Output file name	1 - 192
REMEDGE	String	Remove outside perimeter edges from the raster	0 - 3	YES | NO Default: NO
SMOOTHV	String	Smooth vectors	0 - 3	YES | NO Default: YES
DBSD	String	Output segment description	0 - 64
FTYPE	String	Output file type	0 - 4	Default: PIX
FOPTIONS	String	Output file options	0 - 64
MONITOR	String	Monitor mode	0 - 3	ON, OFF Default: ON

* Required parameter

Parameter descriptions

FILI

Specifies the file that contains the input raster channel to be processed.

DBIC

Specifies the input raster channel to be processed.

Ranges of channels or segments can be specified with negative values. For example, {1,-4,10} is internally expanded to {1,2,3,4,10}. When you are not specifying a range in this way, only 48 numbers can be specified explicitly.

FILO

Specifies the name of the file to which the new line layer will be saved. This file is created if it does not already exist.

REMEDGE

Specifies whether remove the outside edges (bounds) of the raster.

If YES (selected), lines are removed from the bounds of the raster when converting to lines. If NO (cleared), lines are created for the entire extents of the raster; this is the default value.

SMOOTHV

Specifies whether or not the vector data will be smoothed (corners rounded).

If SMOOTHV is set to YES, the vector lines will be smoothed. If this parameter is set to NO, the created vector lines will follow the pixel edges exactly.

DBSD

Describes (in up to 64 characters) the contents or origins of the output data.

If this parameter is not specified, a default description is generated.

FTYPE

Optionally specifies the output file format type, represented by a three- or four-letter code. The format type must be a GDB-recognized file type. If FILO specifies an existing file, FTYPE should not be specified since the existing file will be updated and its type won't be changed.

For a complete list of GDB-recognized file types and their codes, see GDB file formats in the Technical Reference section of the CATALYST Professional online Help.

FOPTIONS

Optionally specifies the file creation options to be applied when creating the output file. These are specific to the file format; in each case, the default of no options is allowed. FOPTIONS can be used to specify the compression schemes, file format subtypes, and other information.

Different options are available for different file types (see the FTYPE parameter). The options are described in GDB file formats in the Technical Reference section of the CATALYST Professional online Help.

MONITOR

The program progress can be monitored by printing the percentage of processing completed. A system parameter, MONITOR, controls this activity.

Available options are:

• ON: Turns the monitor ON (default)
• OFF: Turns the monitor OFF (recommended if running in batch or background mode)

Details

RAS2LINE creates a line layer from an input raster channel. Each contiguous region of equal-valued pixels will be grouped together with lines being created around its edge. The function also provides the option of removing lines from the input raster's bounding box.

Example

Create a line layer based on channel 6 in irvine.pix and save the output vector to a new file, irv6lines.shp. The output layer has a description of "Created From Raster".

EASI> FILI     = "Irvine.pix"       ! input raster file
EASI> DBIC     = 6                  ! input raster layer
EASI> FILO     = "irv6lines.shp"    ! output file to be created
EASI> REMEDGE  =                    ! default, NO lines on the edge not removed 
EASI> SMOOTHV  =                    ! default, YES lines are smoothed
EASI> DBSD     =                    ! output segment description
EASI> FTYPE    = "SHP"              ! output format type
EASI> FOPTIONS =                    ! output format options

EASI> run ras2line