Thanks for the quick reply :) That’s too bad, but it makes sense. The only thing I could think of is, if the header of a file would also include the total number of nodes, ways, etc… That would at least allow some rough estimates.
Greetings Rainer > On 02.03.2015, at 20:45, Jochen Topf <[email protected]> wrote: > > Hi! > > I have thought about how Osmium could supply that information, but it is > rather > difficult due to the way the reader works with several threads etc. And even > if > I implemented some way of accessing the byte count the best you'll get is an > estimate how far you are in the file, because the number of bytes read is a > poor predictor for the number of objects read. There are huge differences > between, say, a simple node without any tags, and a long way or complex > relation. And it will not work at all when reading from stdin or a pipe. So > I am not sure it is worth the effort. > > The best option you currently have is checking the file size, use some > estimate > for bytes-per-object to estimate the number of objects that are probably in > the > file and counting the objects being read yourself. And yes, thats ugly. > > Ideas and opinions welcome. > > Jochen > > On Mo, Mär 02, 2015 at 07:39:51 +0100, Rainer Schlönvoigt wrote: >> Date: Mon, 2 Mar 2015 19:39:51 +0100 >> From: Rainer Schlönvoigt <[email protected]> >> To: Paul Mahon <[email protected]> >> Cc: [email protected] >> Subject: Re: [OSM-dev] Progress information >> >> I forgot to add that I am using Osmium. >> >> The issue is that I don’t have access to exactly that information. >> The reader does not provide it and a buffers size is also not representative >> since the internal data representation is not the same as in the files… >> >> Greetings >> Rainer >> >>> On 01.03.2015, at 19:51, Paul Mahon <[email protected]> wrote: >>> >>> Couldn't you just count the number of bytes read and compare it to the >>> number of bytes in the file? >>> >>> On 15-03-01 08:24 AM, Rainer Schlönvoigt wrote: >>>> While iterating through an OSM file, is there a way to find out how much >>>> of the information has already been iterated through? >>>> >>>> When going through a planet file, it would be very helpful in order to >>>> show something to a user. >>>> >>>> Greetings >>>> Rainer >>>> _______________________________________________ >>>> dev mailing list >>>> [email protected] >>>> https://lists.openstreetmap.org/listinfo/dev >>> >>> >>> _______________________________________________ >>> dev mailing list >>> [email protected] >>> https://lists.openstreetmap.org/listinfo/dev >> >> >> _______________________________________________ >> dev mailing list >> [email protected] >> https://lists.openstreetmap.org/listinfo/dev > > -- > Jochen Topf [email protected] http://www.jochentopf.com/ +49-173-7019282 _______________________________________________ dev mailing list [email protected] https://lists.openstreetmap.org/listinfo/dev
