ReprojectVector Task

This task reprojects the records in a vector from one coordinate system to another.

Example

This example reprojects a shapefile of U.S. counties to the same coordinate system as a raster so that they can be displayed in the same view.

; Start the application

e = ENVI()

; Open a shapefile of counties

VectorFile = Filepath('counties.shp', $

  Subdir=['classic', 'data', 'vector'], $

  Root_Dir=e.Root_Dir)

Vector = e.OpenVector(VectorFile)

; Open an input raster

RasterFile = Filepath('bhtmref.img', $

  Subdir=['classic', 'data'], $

  Root_Dir=e.Root_Dir)

Raster = e.OpenRaster(RasterFile)

; Get the coordinate system of the raster

CoordSys = ENVICoordSys( $

  COORD_SYS_CODE=Raster.SPATIALREF.COORD_SYS_CODE)

; Get the task from the catalog of ENVITasks

Task = ENVITask('ReprojectVector')

; Define inputs

Task.INPUT_VECTOR = Vector

Task.COORD_SYS = CoordSys

; Run the task

Task.Execute

; Display the reprojected vector over the raster

View = e.GetView()

RasterLayer = View.CreateLayer(Raster)

VectorLayer = View.CreateLayer(Task.OUTPUT_VECTOR)

View.Zoom, 0.14

Syntax

Result = ENVITask('ReprojectVector')

Input properties (Set, Get): INPUT_VECTOR, COORD_SYS, OUTPUT_VECTOR_URI

Output properties (Get only): OUTPUT_VECTOR

Properties marked as "Set" are those that you can set to specific values. You can also retrieve their current values any time. Properties marked as "Get" are those whose values you can retrieve but not set.

Methods

This task inherits the following methods from ENVITask:

Properties

This task inherits the following properties from ENVITask:

COMMUTE_ON_DOWNSAMPLE

INPUT_VECTOR (required)

Specify the input vector to be reprojected.

COORD_SYS (required)

Specify the output coordinate system.

OUTPUT_VECTOR

This is a reference to the output reprojected vector.

OUTPUT_VECTOR_URI (optional)

Specify a string with the fully qualified path and filename for OUTPUT_VECTOR.

Version History

ENVI 5.5. 3

Introduced

API Version

4.2