Sundial for Malelane

Note that the "squares" on the diagram must look square, ie one unit of length horizontally must equal one unit of length vertically.

The data used to create this sundial are listed below, if you want to make your own large "walk-on" sundial. The columns are:

• Time: time at each marker on the timeline.
• Xtime: X (horizontal) offset from 0.0 (centre of graph) of each time marker.
• Ytime: Y (vertical) offset from 0.0 (centre of graph) of each time marker.
• Date: Date of each marker on the date line and analemma ("8")
• Xan: X (horizontal) offset from 0.0 (centre of graph) of each date marker on the analemma.
• Yan: Y (vertical) offset from 0.0 (centre of graph) of each date marker on the analemma; this is equal to the Y offset for the dateline. The X values for the dateline are 0.0.
• Teqn: The offsets of time correction scale at the foot of the analemma, in minutes. -15 means the Sun is 15 minutes late (e.g. in February), so 15 minutes must be added to the time read from the shadow crossing the timeline when standing on the dateline. +15 means the Sun is 15 minutes early (e.g. in early November), so 15 minutes must be subtracted from the time read from the shadow crossing the timeline when standing on the dateline.
• XTeqn: X (horizontal) offset from 0.0 of the time correction at the foot of the analemma. The Y value is set to place it conveniently below the analemma.

	Malelane
	        Time       Xtime       Ytime        date         Xan         Yan        Teqn       XTeqn
       05h00       2.187      -0.227       Jan01      -0.036       0.865      -15.00      -0.164
       05h30       2.237      -0.102       Jan15      -0.091       0.789      -10.00      -0.109
       06h00       2.249       0.024       Feb01      -0.134       0.634       -5.00      -0.055
       06h30       2.223       0.150       Feb15      -0.139       0.465        0.00       0.000
       07h00       2.158       0.274       Mar01      -0.122       0.279        5.00       0.055
       07h30       2.057       0.393       Mar15      -0.089       0.085       10.00       0.109
       08h00       1.920       0.505       Apr01      -0.039      -0.153       15.00       0.164
       08h30       1.750       0.609       Apr15      -0.001      -0.341                        
       09h00       1.551       0.702       May01       0.029      -0.540                        
       09h30       1.325       0.783       May15       0.036      -0.688                        
       10h00       1.076       0.851       Jun01       0.023      -0.819                        
       10h30       0.809       0.904       Jun15      -0.004      -0.874                        
       11h00       0.528       0.942       Jul01      -0.035      -0.868                        
       11h30       0.238       0.964       Jul15      -0.058      -0.805                        
       12h00      -0.056       0.969       Aug01      -0.060      -0.666                        
       12h30      -0.349       0.957       Aug15      -0.045      -0.504                        
       13h00      -0.637       0.929       Sep01       0.000      -0.303                        
       13h30      -0.913       0.886       Sep15       0.046      -0.117                        
       14h00      -1.173       0.827       Oct01       0.101       0.105                        
       14h30      -1.414       0.754       Oct15       0.139       0.295                        
       15h00      -1.630       0.668       Nov01       0.161       0.515                        
       15h30      -1.819       0.570       Nov15       0.152       0.672                        
       16h00      -1.976       0.463       Dec01       0.107       0.809                        
       16h30      -2.100       0.348       Dec15       0.050       0.872                        
       17h00      -2.187       0.227                  -0.036       0.865                        
       17h30      -2.237       0.102                                                            
       18h00      -2.249      -0.024                                                            
       18h30      -2.223      -0.150                                                            
       19h00      -2.158      -0.274