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 http://www.openstreetmap.org/way/277899879 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.
12016-07-16 03:36:26 UTCbdiscoe Hi there, many of the ways in this changeset are EXTREMELY overnoded. When you upload, you need to check the data FIRST for this problem and solve it before uploading. Otherwise it creates 26903 nodes in the OSM database, then someone has to come along afterwards and clean it up by deleting ~90% o...
22016-07-16 03:45:46 UTCbdiscoe Example: before: http://i.imgur.com/HuJTxvi.png
After: http://i.imgur.com/VDAa6uE.png

Notice how the nodes for the selected are reduced from 1832 to 241, without affecting the accuracy of the data at all.
12016-05-03 16:47:42 UTCbdiscoe Yes, it's NHD. Welcome to my world, Jeopardy. I've spent much of the last 6 months of my life cleaning up North Carolina's NHD (outdated wetlands just like these here in Florida). It's just a huge task, thanks for helping!
22016-05-03 16:57:16 UTCHarry Wood The messiness of the data seems to be echoed by the messiness of the wiki page which is supposed to describe the dataset and the import process/status http://wiki.openstreetmap.org/wiki/National_Hydrography_Dataset
32016-05-04 01:54:36 UTCJeopardyTempest Good to know :-)

Though it seems the wetlands are at least proximate... we also seem to have a messy import of a church dataset with scattered nonexistent churches that seems more problematic.

So what do you guys do to clean them up? If there's development over what used to be wetlands, I'll ...
42016-05-13 06:17:52 UTCbdiscoe To answer your last question, Yes.
12016-04-26 18:15:45 UTCbdiscoe Rps, there are some serious issues with this import. For example, consider way http://www.openstreetmap.org/way/413668789 It is "water", but unclosed. It is also duplicated, as is all the other sections of water which should have been joined here. PLEASE stop importing millions of featu...
22016-04-26 20:28:16 UTCRps333 Hi, thanks for pointing it out. The JOSM validation did not pick that out. I will clean them up. cheers
32016-04-26 21:52:47 UTCbdiscoe When I load a small area around this feature, the JOSM validator reports "Errors: Duplicated ways (98), Duplicated nodes (s), Warning: natural type water - Unclosed way (46)"
42016-04-26 22:01:51 UTCbdiscoe Rather than import huge amounts (>500K changed features on the day of this changeset!), I'd strongly recommend doing smaller sections (like ~10K features/day) so you can check it for errors _before_ uploading, thanks.
52016-04-28 19:08:07 UTCbdiscoe It's two days later, and JOSM in this area still reports errors unclosed ways. Please fix your import before importing any more, thanks.
62016-04-28 19:13:33 UTCRps333 Hi I have been checking the JOSM again and for what ever reason JOSM is not finding the errors. I am pretty sure most of the errors are on the edge of the AOI that I downloaded from NRCan. I will try checking with another version of JOSM and a different PC.
12016-01-22 23:08:26 UTCbdiscoe Hello Davaadulam, I see you changed the english name (name:en) of this street from "Olympic Avenue" to "Олимпийн өргөн чөлөө". The English name is actually "Olympic Avenue, correct? Why did you change it?
12015-12-16 19:43:47 UTCbdiscoe Kendall, you added ways which should be paths or service roads, but you tagged them as "motorway" with names like "I-40 West" which is very odd and confusing. I will attempt to fix the tagging, but what did you intend here?
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: 👍🏻👍🏼👍🏽👍🏾👍🏿😊😄😊
22015-10-24 15:54:42 UTCbdiscoe 👍
12015-06-08 20:48:33 UTCbdiscoe Maykel, you used "service" incorrectly for the roads in the village. They are "residential" roads.
22015-06-08 20:50:25 UTCbdiscoe Also, where two roads cross, they need to share a node. Please learn about connectivity.
12015-06-08 20:26:20 UTCbdiscoe Albert, you damaged the main Pinrang-Rappang highway by incorrectly changing the secondary to a service road. I will fix it now, but please be careful in the future.
22015-06-08 20:27:19 UTCbdiscoe Also, never name roads just "jalan". The name tag is only for the actual name of the road, e.g. "Jln Poror Pinrang-Rappang"
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.
12015-04-27 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...
12015-05-12 11:26:51 UTCmaraf24 With over 30000 deleted nodes this is certainly a mechanical edit.
http://wiki.openstreetmap.org/wiki/Automated_Edits_code_of_conduct
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.
12015-05-05 20:42:08 UTCbdiscoe This looks like a building import, but there were already buildings there. Was there no attempt to integrate and check for overlaps? Is there a plan to clean this up, or should I go ahead and clean it up manually?
22015-05-07 20:00:05 UTCbdiscoe I've proceeded to clean it up now.
bdiscoe has contributed to 14 changeset discussions(s) with a total of 39 comment(s)