Hi! When JOSM saves OSM files it uses a particular order: First nodes, then ways, then relations as usual. For each object type it first writes out objects with negative IDs (ie objects that are not uploaded yet), then objects with positive IDs, both are ordered by absolute value.
Is this something I can rely on or is this just something that happened accidentally with my version of JOSM when I tried this? The reason I am asking: I sometimes get requests for Osmium features from people who want to do something with files saved from JOSM, like renumber them to have only small positive IDs, or convert them into other formats. Osmium can read JOSM files and handle negative IDs, so these things mostly work, but in some cases having a known order helps (or is even necessary for correct functioning). I am currently working on some things there but if JOSM would not keep to this order in the future they would break again. Jochen -- Jochen Topf [email protected] https://www.jochentopf.com/ +49-351-31778688
