Sundial for Polokwane / Pietersburg

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.

	Polokwane / Pietersburg

        Time       Xtime       Ytime        date         Xan         Yan        Teqn       XTeqn
       05h00       2.167      -0.245       Jan01      -0.036       0.876      -15.00      -0.164
       05h30       2.228      -0.128       Jan15      -0.091       0.800      -10.00      -0.109
       06h00       2.250      -0.009       Feb01      -0.134       0.642       -5.00      -0.055
       06h30       2.234       0.110       Feb15      -0.139       0.471        0.00       0.000
       07h00       2.179       0.227       Mar01      -0.122       0.282        5.00       0.055
       07h30       2.087       0.340       Mar15      -0.089       0.086       10.00       0.109
       08h00       1.960       0.447       Apr01      -0.039      -0.155       15.00       0.164
       08h30       1.799       0.547       Apr15      -0.001      -0.345                        
       09h00       1.607       0.637       May01       0.029      -0.547                        
       09h30       1.388       0.717       May15       0.036      -0.697                        
       10h00       1.145       0.784       Jun01       0.023      -0.830                        
       10h30       0.882       0.838       Jun15      -0.004      -0.885                        
       11h00       0.604       0.877       Jul01      -0.035      -0.880                        
       11h30       0.316       0.901       Jul15      -0.058      -0.816                        
       12h00       0.023       0.910       Aug01      -0.060      -0.675                        
       12h30      -0.271       0.904       Aug15      -0.045      -0.511                        
       13h00      -0.560       0.882       Sep01       0.000      -0.308                        
       13h30      -0.840       0.845       Sep15       0.046      -0.118                        
       14h00      -1.105       0.793       Oct01       0.101       0.106                        
       14h30      -1.351       0.728       Oct15       0.139       0.299                        
       15h00      -1.575       0.650       Nov01       0.161       0.522                        
       15h30      -1.771       0.562       Nov15       0.152       0.681                        
       16h00      -1.937       0.463       Dec01       0.107       0.819                        
       16h30      -2.070       0.357       Dec15       0.050       0.883                        
       17h00      -2.167       0.245                  -0.036       0.876                        
       17h30      -2.228       0.128                                                            
       18h00      -2.250       0.009                                                            
       18h30      -2.234      -0.110                                                            
       19h00      -2.179      -0.227