Printed map measurement is different than measurement in arcmap

Discussion created by rndieu on Feb 13, 2013
Latest reply on Feb 13, 2013 by dtumberg2012
Hi, I really appreciate who can help me answer/fix this problem.

I'm making an aerial map for an engineer to measure the lengt of a street. I used the measurement tool to measure segment of the map in ArcMap 10. The measurement was precise and I double checked with Google Map. However, after exported the map to PDF and printed it out,  I took another measurement on paper and the result was off. The measurement was longer than the one I measured in Arcmap and Google map. ( I used the engineering scale 1 inch = 100 ft).

Please let me know what I have done wrong and how to fix it.

Thank you very much.