GGU-GEO-GRAPH: "Coloured contours" button

Using this button contour lines can be drawn with a colour fill.

• "Contour data" group box
  The "Determine extreme values…" button computes the minimum and maximum values and enters them into the appropriate input boxes. However, you need not retain these values, but can also define your own. In the example shown in the dialog box above it would make sense to define the minimum value as 69.50 and the maximum as 70.50. If you then enter 11 for the "No. of colours", the colour of the contour fill will change every 10 cm. If 21 colours are entered the colour changes for every 5 cm potential differential.

No smoothing of the contour lines can be performed here.

• "Colour fill" group box
  You can control the colour subdivisions of the contour diagram using "No. of colours". In the example above, 16 colours will be displayed between "Colour 1" and "Colour 2". The default setting is a colour course from red to blue. These colours can be edited as required after selecting the "Colour 1" and "Colour 2" buttons, or simply reverse the choice by selecting the "Change colour series" check box.

• "Further preferences" group box
  In addition to the colour presentation you can also have the triangle mesh and/or the outline displayed. Additional contour lines can also be drawn. Line labelling preferences can be defined by means of the "Labelling preferences" button.

• "OK"
  The colours will be drawn after confirmation.

A colour bar at the right edge of the sheet allows correlation between the colour and the corresponding value. If this colour bar is drawn in the right page margin, specify a larger value for the right plotting margin (e.g. 25 mm) in the "Page size + margins/Page size and margins" menu item.