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ESRI streetmap data for distance calculation.

Question asked by jhansi131 on Jan 22, 2012
Latest reply on Mar 27, 2012 by

I am working with ESRI streetmap data i.e. SDC data is in GCS_North_American_1983. I am also using the streets network dataset provided with the streetmap data which is also in same geographic coordinate system.

I am performing network analysis(OD matrix) in an ArcEngine application and when testing smaller roads shapefile, I projected it to get right distances. 
My question is wouldn't the results be right if the network dataset was built from a projected streets layer. The results would definitely vary if a projected network dataset was used. So should I create a shapefile from the SDC streets file, project it to North America Lambert Conformal Conic and then generate a network dataset.

Or does the ESRI network dataset give right results as it is.

Correct me if my analysis is wrong?