CoastWatch Data Analysis Tool Help: Shape and Text Annotations

In this section:

What are annotations?

Annotations are text, lines, polygons, and other shapes on the data view. You can choose the default color, line style, fill, and text font, and manipulate the annotations as layers, similar to data overlays and surveys.

Annotation tools

The following figure shows the annotation controls, with the annotation tool buttons and current list of annotation layers:

You can add shapes and text using the CDAT toolbar buttons as follows:

Line
Draws a line in the current color and style.
Polyline
Draws a series of connected line segments in the current color and style.
Curve
Uses a set of polyline control points to draw a Bezier curve in the current color and style.
Rectangle
Draws a rectangular box in the current color and style, and fills with the fill color.
Polygon
Draws an irregular polygon in the current color and style, and fills with the fill color.
Circle
Draws a circle from the center to radius point in the current color and style, and fills with the fill color.
Text
Places the specified text in the current font and color. The text font size remains constant if the data view zoom factor is modified. The text anchor point moves with the view.

Annotation list

Once added to the annotation layer list, annotations are similar to surveys and overlays, in that they can be modified, renamed, set visible or invisible, moved up or down in the list, and removed — see the overlays section for details.

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