Numbers on maps perform a similar role to proportional symbols, i.e., in each unit, they present the individual value of the phenomenon at a given point or in a given area. If the numbers presented in the same way throughout the map do not diffffer from each other in their graphic ...
salam50in@yahoo.co.in 3 Department of Mathematics, Midnapore College (Autonomous), Midnapore, West Midnapore 721101, India; sankar.res07@gmail.com 4 Laboratory of Computational Sciences and Mathematical Physics, Institute for Mathematical Research, University Putra Malaysia, Serdang 43400 UPM, Malaysi...