This task performs raster calculations of topographic breaklines.
For additional details on topographic breaklines, see Topographic Breaklines.
Example
e = ENVI()
File = FILEPATH(bhdemsub.img', $
SUBDIRECTORY=['classic','data'], $
ROOT_DIR=e.ROOT_DIR)
Raster = e.OpenRaster(File)
Task = ENVITask('TopographicBreaklines')
Task.INPUT_RASTER = Raster
Task.Execute
DataColl = e.Data
DataColl.Add, Task.OUTPUT_RASTER
View = e.GetView()
Layer = View.CreateLayer(Task.OUTPUT_RASTER)
Syntax
Result = ENVITask('TopographicBreaklines')
Input parameters (Set, Get): INPUT_RASTER, KERNEL_SIZE, OUTPUT_URI
Output parameters (Get only): OUTPUT_RASTER
Parameters marked as "Set" are those that you can set to specific values. You can also retrieve their current values any time. Parameters marked as "Get" are those whose values you can retrieve but not set.
Input Parameters
INPUT_RASTER (required)
Specify a digital elevation model raster on which to calculate topographic breaklines.
KERNEL_SIZE (optional)
Specify the size of the kernel that will be used to calculate the breakline values. Permitted values are 5, 9, 17, and 33. The default value is 9.
OUTPUT_URI (optional)
Specify a string with the fully qualified filename and path of the associated OUTPUT_RASTER.
- If you do not specify this parameter, or set it to an exclamation symbol (!), ENVI creates a temporary file.
- If you set it to the hash symbol (#), ENVI creates a file in the temporary directory, but this file will not be deleted when ENVI closes.
Output Parameters
OUTPUT_RASTER
This is a reference to the output raster of filetype ENVI.
Methods
Execute
Parameter
ParameterNames
Properties
DESCRIPTION
DISPLAY_NAME
NAME
REVISION
TAGS
Version History
See Also
ENVITask, TopographicFeatures Task, Masking Support in ENVITasks