converting Distance Field values from a Spatial Join

Discussion created by DanBear on Jun 27, 2011
Latest reply on Jun 28, 2011 by DanBear

I recently used the Spatial Join tool to join 2 point files of X/Y, Lat/Long values, one being Weather Stations, the other Zip Code Centroids.  The files had an angular unit of Degree (decimal degree, I am guessing/hoping?)  The distance field was in a decimal format. 

I would like to be able to convert this 6 digit number into miles, but am in the dark as to what conversion factor do I use.   I can easily draw a line between a Weather Station and a Zip Code Centroid in miles, but how to convert the value in the Distance field is mystifying.

Please clear this up ASAP.

Thank you,

Dan Brenner