Hi
Q1. The total length of 53N parallels of latitude on a direct Mercator chart is 133cm.what is approximate scale at latitude 30S?
1:25 000 000-----ANs{ I did this by first finding scale of equator from 53degree N parallel...then using it to calculate scale at 30S...............but not able to get the correct ans....please guide with this Q.}
thanks
wat i would do is to find the scale @ 53N first.
When i get dat i would use the ABBA formula to find the scale @ 30S
i.e. sc= 133/ 360*60*cos53*185300
sc=1/18110921
Now using the ABBA formula
18110921*cos30= X*cos53
X= 26062025~25000000.