Hiya! Thanks for the speedy responses Dubravko & Rodrigo. I�??ve attached the code I am trying to get to work to this reply (I hope!). It was taken off one of the old forum subjects from 2002, so maybe the problem is that I�??m using a newer version of ArcGIS? This code has the proximity operator function in it. I just don�??t know if it won�??t run because of an issue with the code, or the way I�??m trying to run it. It does seem that the Macro function doesn�??t register any more than the first Sub. Could this be the issue? If so, how do I fix it? Rodrigo �?? thanks for your advice. I�??m not sure how Heron�??s formula works though. If it needs a triangle, where does it get the three points from? I�??m afraid my maths skills are almost as bad as my computer skills! 😮 Jo
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