Next Previous Up Contents
Next: Pair Link Form
Up: Plot Forms
Previous: Error Bars Form

#### A.5.5.5 Ellipse Form

Ellipse form configuration panel

The Ellipse form () draws an ellipse (or rectangle, or other similar figure) defined by major and minor radii and an optional rotation angle.

The configuration options are:

Shading Mode
  See Appendix A.5.6.
Major Radius, Minor Radius
  Two radii for the ellipse, in the same units as the position coordinates (which is degrees for the sky plot). It doesn't matter whether the major one is larger than the minor one.
Orientation
  Position angle in degrees. For the plane plot it is the angle anticlockwise from the X axis to the major radius. For the sky plot it is the angle from the North pole to the major axis in the direction of positive RA. If the value is missing (either this field not filled in or blank in the data) it is considered to be zero.
Ellipse
  Ellipse shape, selected from a range of options (includes also rectangles, crosses etc).
Scale
  Changes the factor by which all ellipse sizes are scaled. If the ellipses are too small, slide it right, if they are too big, slide it left. The scale is logarithmic.
Auto Scale
  If selected, this option will determine the default ellipse scale size from the data - it will fix it so that the largest ellipses are a few tens of pixels long by default. That scaling can then be adjusted using the Scale slider. If unselected, then the default position of the Scale slider corresponds to the actual positions given by the submitted ellipse radii coordinates.

Next Previous Up Contents
Next: Pair Link Form
Up: Plot Forms
Previous: Error Bars Form

TOPCAT - Tool for OPerations on Catalogues And Tables
Starlink User Note253
TOPCAT web page: http://www.starlink.ac.uk/topcat/
Author email: m.b.taylor@bristol.ac.uk
Mailing list: topcat-user@bristol.ac.uk