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# JOSM: Simplify way - simplify-way.max-error parameter meaning

 3 What does exactly simplify-way.max-error parameter mean? I found in a discussion from 2009 it was supposed to be mean an error counted in meters (m). But the function seems to run pretty high even with a parameter smaller than 1. I used 0.25 and it seemed to me the error was still counted in several meters... cound not find a real clue here myself. asked 11 Feb '12, 15:31 Kozuch 1.7k●58●72●85 accept rate: 8%

 4 It is the maximum deviation of old and new way in meters. I've extended the help page, hope this answers your questions. answered 12 Feb '12, 15:46 bastik 651●3●9●19 accept rate: 41% 2 Yes, it is worth noting that you should generally NOT APPLY this function to geometry other then what you entered yourself! This algorithm is harming the geometry seriously in some cases (narrow curves), because it is not aware of angles but only of differences in position in metres. Application of this function has to be considered a kind of automated edit and is therefor subject to the special rules we have for this kind of edits. Look at this for more info: http://wiki.openstreetmap.org/wiki/Automated_Edits (26 Feb '12, 12:27) dieterdreist Please stay calm, I am not touching data of others. I used this tool to simplify my import of CDDA by EEA (source=EEA:CDDA2009). (26 Feb '12, 13:05) Kozuch

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question asked: 11 Feb '12, 15:31

question was seen: 6,010 times

last updated: 26 Feb '12, 13:05

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