/**
* Override paint method to draw map
+ * @param g Graphics object
*/
public void paint(Graphics g)
{
int maxAltitude = altitudeRange.getMaximum();
// message if no altitudes in track
- if (minAltitude < 0 || maxAltitude < 0)
+ if (minAltitude < 0 || maxAltitude < 0
+ || minAltitude == maxAltitude)
{
g.setColor(COLOR_LINES);
g.drawString(I18nManager.getText("display.noaltitudes"), 50, height/2);