Changeset No. Date Contributor Comment
12017-03-30 11:09:53 UTCde vries Hi bdiscoe,
I need to ask you to be more careful with edits like these. In this changeset you seem to have targeted BAG buildings for mass simplification. The methods and software used for importing and actualization of the BAG data has been discussed in great length. So doing mechanical edits to t...
22017-04-20 15:27:35 UTCbdiscoe Hi, if you take a close look, you will see that no "details" were removed. As part of other cleanup (maproullette farm->farmland), I've been run the JOSM validator on some of the nearby buildings and landuse, and tidying up the results. The BAG buildings have numerous issues (including...
32017-04-20 15:45:32 UTCbdiscoe For what it's worth, I recognize unlike other mass imports I'd had to clean up (Canvec, NHD, Tiger...) this data is much better in precision as well as accuracy. That's why i use thresholds not of 70-110 cm as with NHD, but as little as 6 cm for BAG, guaranteeing that cleanup stays within the accur...
42017-04-27 21:36:15 UTCbdiscoe For an example of BAG problems, see buildings like which has a "sliver" which is 18cm wide and 3m long; it is clearly a mechanical error. I have manually fixed hundreds of these problems.
52017-04-28 20:32:31 UTCCommodoortje Hi bdiscoe,

Thank you for fixing the JOSM validation errors on BAG import here.
The person who did the BAG import is responsable for fixing duplicated nodes/crossing buildings/building inside building self-intersecting ways etc...
12017-01-18 17:27:29 UTCSomeoneElse Hi, used to extend from but was deleted in . Does that make sense to you? An attempt to communicate with the author of that changeset didn't get anywher...
12016-07-12 16:29:39 UTCmaxerickson There was some kind of selection error in this changeset that moved quite a few nodes that were connected to powerlines. For example, a node that I've just fixed:

And a shot of the spot:

I noticed the same effect with ...
12016-05-25 21:54:29 UTCSunfishtommy A lot of these relations seem to be piled up on top of one another. I just found two natural=wood relations that were duplicated on top of one another
12016-02-13 22:04:39 UTCmaraf24 Do you know the difference between source and source:building?
The former is ambiguous. This is the tag you should remove, not source:building.
12015-11-24 22:02:17 UTCgileri Thank you, this looks like a good thing to do !

May I ask how did you do it with JOSM ?
22015-11-25 07:15:19 UTCbdiscoe In the preferences, under "advanced", there is a setting called "simplify-way.max-error". It is important to set this to a low number appropriate for the specific geometry; in the case of a very clear lake like this, sub-meter precision can be maintained, hence a value of 0.4
32015-11-25 16:22:13 UTCgileri Thank you !
12015-10-24 15:52:53 UTCbdiscoe Testing ability to put emojis in chageset comments: πŸ‘πŸ»πŸ‘πŸΌπŸ‘πŸ½πŸ‘πŸΎπŸ‘πŸΏπŸ˜ŠπŸ˜„πŸ˜Š
22015-10-24 15:54:42 UTCbdiscoe πŸ‘
12015-04-27 18:50:03 UTCtrigpoint Hi
I have spotted that you have edited the River Severn in Shropshire.
The river forms parts of Montford/Ford parish boundaries and in moving the river flow you have moved the boundaries so that they no longer follow the official lines.
I am not sure what source you used to determine the main flo...
22015-05-01 16:48:35 UTCbdiscoe Hi tngpoint, mostly this changeset was fixing the riverbanks and adding the islands. The centerline moved only very slightly; it had a few places where it did not appear to correspond to the river flow. I did the best I could using the aerial, but if you have better local knowledge, please feel fre...
32015-05-01 16:52:47 UTCbdiscoe Also, I notice that it isn't quite consistent; in some places the parish boundaries share a way with the river, in other places they use two separate ways; perhaps someone determined that on that stretch the "official" boundary differed significantly enough from the river. Some boundaries...
42015-05-01 19:30:41 UTCSomeoneElse I've always wondered (where boundaries follow rivers) exactly how those boundaries are defined, given that rivers move? In this case is there a text description that says something like "follows the centreline of the river from blah to blah", or is it defined in terms of exact coordinates...
52015-05-25 02:01:45 UTCbdiscoe @SomeoneElse, it depends :) In some places the legal boundary is defined as the river, in other places the river was surveyed and that description of the course defined as legal boundary. It takes local knowledge to know the difference in different parts of the world.
62015-05-25 11:40:22 UTCtrigpoint The boundaries are taken from the latest OS Boundaryline, so can be assumed to indicate the official boundaries.
I part way through a project to add the Shropshire parish boundaries, some sections of the Severn have yet to be joined to the parish boundaries.
I am not sure how "the main flow&q...
12015-05-09 20:42:32 UTCmaraf24 Is this tag removal and transformation discussed with polish community?
22015-05-25 02:04:55 UTCbdiscoe Hi maraf24, I believe I only removed a few tags, which were uncontroversially incorrect or extraneous. If there is a page that describes the Wroclaw building import, please direct me to it.
12015-05-12 11:26:51 UTCmaraf24 With over 30000 deleted nodes this is certainly a mechanical edit.
22015-05-22 06:44:57 UTCbdiscoe I reviewed it personally. There is decimation to remove noise and redundancy, but I also go over what remains manually to compare it to the aerial; many of these wetlands are no longer here and are adjusted accordingly.
12015-04-07 05:59:30 UTC51114u9 Thanks for contributing in Bolivia. We don't have many local contributors and what you did helps a lot :)

You say "desert", no is "altiplano" ;-)
12014-11-29 02:48:19 UTCbdhurkett Hi, although you presumably fixed several other errors, you did a bit of damage to a local bus route relation (V2 of with this changeset. It's nothing that can't be fixed, but you might want to keep an eye on that kind of thing in future.
12 changeset(s) created by bdiscoe have been discussed with a total of 26 comment(s)