ENVIAnnotationLayer

This is a reference to an annotation layer object. Use ENVIView::CreateLayer to create a new annotation object.

Example

; Start the application

e = ENVI()

; Open an input file

file = FILEPATH('qb_boulder_msi', $

ROOT_DIR=e.ROOT_DIR, SUBDIRECTORY = ['data'])

raster = e.OpenRaster(file)

; Display the raster layer

View = e.GetView()

RasterLayer = View.CreateLayer(raster)

; Create an annotation set using Geographic Lat/Lon

; WGS-84 as the spatial reference

annotation = ENVIAnnotationSet(/GEOGRAPHIC)

; Label the community park

annotation.AddCircle, $

-105.22101050, 39.9917, $ ; X and Y coordinates

[300.0, 200.0], $ ; ellipse axes (m)

LINE_COLOR='lime green', NAME='Park polygon'

annotation.AddText, $

-105.22118409, 39.99424191, $ ; X and Y coordinates

'East Boulder!C Community Park', $

GLYPH_COLOR='lime green', NAME='Park label'

; Label the reservoir

annotation.AddText, $

-105.20407487, 39.99911740, $ ; X and Y coordinates

'Baseline!C Reservoir', $

GLYPH_COLOR='light sky blue', $

NAME='Reservoir label'

; Save the annotation set

outFile = e.GetTemporaryFilename()

annotation.Save, outFile

; Display the annotation layer

AnnLayer = View.CreateLayer(annotation)

Return Value

This function returns a reference to an ENVIAnnotationLayer object.

Methods

Properties

DATA (Get)

The ENVIAnnotationSet contained by the annotation layer.

HIDE (Get, Set)

Set this property to 1 to hide the layer, and to 0 to display it. The default value is 0.

TRANSPARENCY (Get, Set)

Specify a floating-point value between 0 (opaque) and 100 (invisible) that defines the transparency of the layer. The default value is 0.

VIEW (Get)

The ENVIView where the annotation layer resides.

Version History

ENVI 5.6.1

Introduced

API Version

4.2