Sundial for Giyani

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.

	Giyani
	
        Time       Xtime       Ytime        date         Xan         Yan        Teqn       XTeqn
       05h00       2.422      -0.245       Jan01      -0.040       0.978      -15.00      -0.164
       05h30       2.482      -0.118       Jan15      -0.101       0.892      -10.00      -0.109
       06h00       2.500       0.012       Feb01      -0.149       0.716       -5.00      -0.055
       06h30       2.475       0.141       Feb15      -0.154       0.526        0.00       0.000
       07h00       2.407       0.267       Mar01      -0.135       0.315        5.00       0.055
       07h30       2.298       0.390       Mar15      -0.099       0.096       10.00       0.109
       08h00       2.150       0.505       Apr01      -0.044      -0.173       15.00       0.164
       08h30       1.965       0.612       Apr15      -0.001      -0.385                        
       09h00       1.747       0.708       May01       0.033      -0.611                        
       09h30       1.499       0.793       May15       0.040      -0.777                        
       10h00       1.225       0.863       Jun01       0.025      -0.926                        
       10h30       0.930       0.919       Jun15      -0.004      -0.988                        
       11h00       0.619       0.959       Jul01      -0.039      -0.982                        
       11h30       0.297       0.983       Jul15      -0.065      -0.910                        
       12h00      -0.029       0.990       Aug01      -0.067      -0.753                        
       12h30      -0.355       0.980       Aug15      -0.050      -0.570                        
       13h00      -0.675       0.953       Sep01       0.000      -0.343                        
       13h30      -0.984       0.910       Sep15       0.051      -0.132                        
       14h00      -1.275       0.852       Oct01       0.112       0.118                        
       14h30      -1.545       0.778       Oct15       0.154       0.333                        
       15h00      -1.788       0.692       Nov01       0.179       0.582                        
       15h30      -2.001       0.594       Nov15       0.169       0.760                        
       16h00      -2.180       0.485       Dec01       0.119       0.914                        
       16h30      -2.321       0.368       Dec15       0.055       0.985                        
       17h00      -2.422       0.245                  -0.040       0.978                        
       17h30      -2.482       0.118                                                            
       18h00      -2.500      -0.012                                                            
       18h30      -2.475      -0.141                                                            
       19h00      -2.407      -0.267