Drawing the ellipse in Baghpat

Data
Latitude : 28.881
Longitude : -77.249
Zone meridian : -82.50
Gnomon Height : 2m
E/W-SemiAxis : 2m
OA = 2.00 m ( E/W-SemiAxis )
OB = 0.97 m ( N/S-SemiAxis )
Focus c = OF = 1,75 m
String Length 2a+2c = 7,50 m