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METROPOLITAN AREA
PHILADELPHIA
ROE MCTROROLTAN AREA oor
POPULATION LIMITS T———
COMMUTING AREA — ——
SUSURBAN, EWEPMPER. CIRCULATION mm me
METROPOLITAN TELEPHONE, SERUCE sreevseneerss
PHESI uses process ASSCCTON
Master Map used in final determination of Metropolitan Area. On this map
were drawn the boundary lines expressing the extent of influence of the various
 determinant factors, such as population density limits, commuting area,
etc. The true Metropolitan Area line was developed as a composite of all
these. Then, since township divisions are the smallest within which public
and other agencies customarily compile statistical information, the true
Metropolitan Area line (shown as light solid line on this map) was adjusted
to conform to nearest existing township lines, the final Metropolitan Area
line (heavy solid line) expressing this adjustment.
Five