Making use of the first unprojected London street network through the prior move, develop two new shapefiles in which the output data is 1st projected in UTM NAD 1927 and the other is projected in UTM NAD 1983. Detect the distinction between these two datums will rely on where http://zion948ou.targetblogs.com/16379965/new-step-by-step-map-for-论文代写