[talk-au] How many points are too few to upload?
I recently modified an app I made which can be used to prove you weren't speeding if you get pinged incorrectly by cops. Long story short, if accepted/enabled by the user, an anonymised version of their GPX file ends up on OSM, another app someone else made does something similar. However if people only run the app for a short time you get very small, possibly useless data being uploaded to OSM, on the other hand you can get 10,000+ point files being uploaded as well and I need to run gpsbabel over the file before uploading it. Does anyone have an opinion on this? http://www.openstreetmap.org/traces/tag/automatic_upload 72 uploads in 12 hours, give or take... ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] How many points are too few to upload?
> the other hand you can get 10,000+ point files being > uploaded as well and I need to run gpsbabel over the file > before uploading it. Does anyone know if this is a good filter to use against gpx files? gpsbabel -i gpx -f test -x simplify,crosstrack,error=0.0001k -o gpx -F test.gpx Before: 9180 points After: 3207 points ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] How many points are too few to upload?
> >> the other hand you can get 10,000+ point files being >> uploaded as well and I need to run gpsbabel over the file >> before uploading it. > > Does anyone know if this is a good filter to use against gpx files? > > gpsbabel -i gpx -f test -x simplify,crosstrack,error=0.0001k -o gpx -F > test.gpx > > Before: 9180 points > After: 3207 points Have you loaded both into josm and seen how they compare? That would give you an idication on how the filter affects the data. -- Cheers Ross ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] How many points are too few to upload?
--- On Thu, 18/6/09, Peter Ross wrote: > In that case I can't help you whether it's a good idea or > not. > Generally I upload all my points to OSM and then let other > people > decide whether or not they want to filter them. I have no problem doing that, but I thought I was being, in a sense "responsible", by filtering out the redundant points recorded. ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] How many points are too few to upload?
--- On Thu, 18/6/09, Ross Scanlon wrote: > Have you loaded both into josm and seen how they compare? > > That would give you an idication on how the filter affects > the data. No I hadn't, but I'm in the process of doing it now. I was hoping for a common consensus, if there was one, on redundant information. Something interesting I did note, when I compressed both files, so I could download/test them, the before file was 35k, the file gpsbabel produced is 45k. ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] How many points are too few to upload?
> Have you loaded both into josm and seen how they > compare? For the most part they are almost identical, but there is a few small differences, although probably not enough that most people would worry about, but the bigger question is how OSM stores them, if they compress the files the original would be better as gpsbabel makes them bigger. ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
