Re: [Talk-ca] Problem with overpasses in NB??
Yeah, I've been looking into that. I'm no Overpass pro either, though, but should be able to come up with something. Bug me again in a couple days if I don't :-) Harald. On Mon, Dec 2, 2013 at 9:07 PM, Connors, Bernie (SNB) bernie.conn...@snb.ca wrote: Richard, What I would like to do is run a query with the Overpass API that would identify the locations of this error so we can all judge how large an issue this is. Unfortunately I have never written an Overpass API query and I would like some assistance. Recently this query ( http://goo.gl/AYJ0Nt) that identifies errors in Motorway links was shared on Talk-CA and I modified the bounding box to run it against New Brunswick. Can somebody help me out with a query that identifies unnecessary intersections in bridges? TIA, Bernie. -- Bernie Connors, P.Eng New maryland, NB bernie.conn...@unb.ca From: Richard Weait [rich...@weait.com] Sent: December 2, 2013 4:50 PM To: Connors, Bernie (SNB) Cc: Talk-CA OpenStreetMap Subject: Re: [Talk-ca] Problem with overpasses in NB?? On Mon, Dec 2, 2013 at 1:24 PM, Connors, Bernie (SNB) bernie.conn...@snb.ca wrote: Here is an example - http://osm.org/go/cgZ854R_8-- The problem is that there is an intersection node between McKinnon Road and Route 8 but there is an overpass bridge at this location. That does look like an error, I've fixed that one. The history on the involved objects is short, and suggests that it is an import. Do you want to contact the mapper and ask about the matter? ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca -- Please use encrypted communication whenever possible! Key-ID: 0x34cb93972f186565 ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Problem with overpasses in NB??
Here is another sample of the problem since Richard corrected my other example ;-) http://osm.org/go/cgOZhazjT?m= As I see it there are 2 problems with these bridges: 1) they intersect with the roads that pass beneath them 2) the layer value is not set so the default value of layer=0 (ground) is assumed. Typically a bridge should have layer=1. I would like to have an overpass api query that selects bridges that meet either of these conditions. Thanks, Bernie. Sent from Samsung Mobile___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Problem with overpasses in NB??
I think I saw an instance of the same problem when adding road names in Quebec Province recently. Tom Taylor On 03/12/2013 9:21 AM, berniejconnors wrote: Here is another sample of the problem since Richard corrected my other example ;-) http://osm.org/go/cgOZhazjT?m= As I see it there are 2 problems with these bridges: 1) they intersect with the roads that pass beneath them 2) the layer value is not set so the default value of layer=0 (ground) is assumed. Typically a bridge should have layer=1. I would like to have an overpass api query that selects bridges that meet either of these conditions. Thanks, Bernie. Sent from Samsung Mobile ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Problem with overpasses in NB??
Okay, so I've done some digging. Unfortunately, the Overpass API does not have a function to identify intersecting ways with a shared node. The only way to find those would be do do an Overpass query for all the bridges and then use javascript to identify the ways that share nodes. I lack the skills to do the latter. Identifying bridges which lack the layer tag, however, is easy: http://overpass-turbo.eu/s/1FZ Once all the missing layer tags will have been added, we can then use keepright's (http://keepright.ipax.at/) layer conflicts function. Based on the description of that function it actually seems like it should already be able to find the problematic junctions: Connected ways should be on the same layer. Crossings on intermediate nodes of ways on different layers are obviously wrong. Junctions on end-nodes of ways on different layers are also deprecated, but common practice. So you may ignore this part of the check and switch them off separately. Please note that bridges are set to layer +1, and tunnels to -1, anything else to layer 0 implicitly if no layer tag is present. Harald. On Tue, Dec 3, 2013 at 9:21 AM, berniejconnors berniejconn...@gmail.comwrote: Here is another sample of the problem since Richard corrected my other example ;-) http://osm.org/go/cgOZhazjT?m= As I see it there are 2 problems with these bridges: 1) they intersect with the roads that pass beneath them 2) the layer value is not set so the default value of layer=0 (ground) is assumed. Typically a bridge should have layer=1. I would like to have an overpass api query that selects bridges that meet either of these conditions. Thanks, Bernie. Sent from Samsung Mobile ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca -- Please use encrypted communication whenever possible! Key-ID: 0x34cb93972f186565 ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Problem with overpasses in NB??
Harald, That's great info and very helpful. Thanks, Bernie. Sent from Samsung Mobile Original message From: Harald Kliems kli...@gmail.com Date:12/03/2013 7:04 PM (GMT-04:00) To: berniejconnors berniejconn...@gmail.com Cc: talk-ca@openstreetmap.org Subject: Re: [Talk-ca] Problem with overpasses in NB?? Okay, so I've done some digging. Unfortunately, the Overpass API does not have a function to identify intersecting ways with a shared node. The only way to find those would be do do an Overpass query for all the bridges and then use javascript to identify the ways that share nodes. I lack the skills to do the latter. Identifying bridges which lack the layer tag, however, is easy: http://overpass-turbo.eu/s/1FZ Once all the missing layer tags will have been added, we can then use keepright's (http://keepright.ipax.at/) layer conflicts function. Based on the description of that function it actually seems like it should already be able to find the problematic junctions: Connected ways should be on the same layer. Crossings on intermediate nodes of ways on different layers are obviously wrong. Junctions on end-nodes of ways on different layers are also deprecated, but common practice. So you may ignore this part of the check and switch them off separately. Please note that bridges are set to layer +1, and tunnels to -1, anything else to layer 0 implicitly if no layer tag is present. Harald. On Tue, Dec 3, 2013 at 9:21 AM, berniejconnors berniejconn...@gmail.com wrote: Here is another sample of the problem since Richard corrected my other example ;-) http://osm.org/go/cgOZhazjT?m= As I see it there are 2 problems with these bridges: 1) they intersect with the roads that pass beneath them 2) the layer value is not set so the default value of layer=0 (ground) is assumed. Typically a bridge should have layer=1. I would like to have an overpass api query that selects bridges that meet either of these conditions. Thanks, Bernie. Sent from Samsung Mobile ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca -- Please use encrypted communication whenever possible! Key-ID: 0x34cb93972f186565___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca
[Talk-ca] Problem with overpasses in NB??
Here is an example - http://osm.org/go/cgZ854R_8-- The problem is that there is an intersection node between McKinnon Road and Route 8 but there is an overpass bridge at this location. I presume there is not supposed to be an intersection where roads cross at a bridge. In Potlatch2 both ways are at the default layer=ground - one way needs to be adjusted to indicate the grade separation. I noticed this at several other locations and made the corrections. But I am wondering if this problem originates with the Canvec data or if a mapper has created these intersections? Can somebody provide some additional insight? Is this also a problem in other provinces? Thanks, Bernie. -- Bernie Connors New Maryland, NB bernie.conn...@unb.ca ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Problem with overpasses in NB??
On Mon, Dec 2, 2013 at 1:24 PM, Connors, Bernie (SNB) bernie.conn...@snb.ca wrote: Here is an example - http://osm.org/go/cgZ854R_8-- The problem is that there is an intersection node between McKinnon Road and Route 8 but there is an overpass bridge at this location. That does look like an error, I've fixed that one. The history on the involved objects is short, and suggests that it is an import. Do you want to contact the mapper and ask about the matter? ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Problem with overpasses in NB??
Provinces provide roads to NRCan that simply package it for GeoBase and Canvec. I might be wrong but I am on the impression that some provinces (not all) create vertices at intersections (2D) and do not consider the elevation (3D). When converting to OSM, duplicated vertices (one on each road) are merged in one node. That might explain what you found Same thing for double spaces in name Daniel -Original Message- From: Richard Weait [mailto:rich...@weait.com] Sent: December-02-13 15:51 To: Connors, Bernie (SNB) Cc: Talk-CA OpenStreetMap Subject: Re: [Talk-ca] Problem with overpasses in NB?? On Mon, Dec 2, 2013 at 1:24 PM, Connors, Bernie (SNB) bernie.conn...@snb.ca wrote: Here is an example - http://osm.org/go/cgZ854R_8-- The problem is that there is an intersection node between McKinnon Road and Route 8 but there is an overpass bridge at this location. That does look like an error, I've fixed that one. The history on the involved objects is short, and suggests that it is an import. Do you want to contact the mapper and ask about the matter? ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Problem with overpasses in NB??
From: Daniel Begin [mailto:jfd...@hotmail.com] Sent: Monday, December 02, 2013 1:34 PM To: 'Richard Weait'; 'Connors, Bernie (SNB)' Cc: 'Talk-CA OpenStreetMap' Subject: Re: [Talk-ca] Problem with overpasses in NB?? Provinces provide roads to NRCan that simply package it for GeoBase and Canvec. I might be wrong but I am on the impression that some provinces (not all) create vertices at intersections (2D) and do not consider the elevation (3D). When converting to OSM, duplicated vertices (one on each road) are merged in one node. The problem is often one of formats. Shapefiles are often used to interchange this data, but shapefiles do not have topology. A common toolchain used for getting data from an ESRI-based server to shapefiles results in files that say that wherever two features cross they join. This is the type of mistake that someone doing an import needs to catch and fix before uploading. The fastest fix I've found in JOSM is to merge the two bridge ways, merge the two under-bridge ways, and delete the node where they intersect. ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Problem with overpasses in NB??
Richard, What I would like to do is run a query with the Overpass API that would identify the locations of this error so we can all judge how large an issue this is. Unfortunately I have never written an Overpass API query and I would like some assistance. Recently this query (http://goo.gl/AYJ0Nt) that identifies errors in Motorway links was shared on Talk-CA and I modified the bounding box to run it against New Brunswick. Can somebody help me out with a query that identifies unnecessary intersections in bridges? TIA, Bernie. -- Bernie Connors, P.Eng New maryland, NB bernie.conn...@unb.ca From: Richard Weait [rich...@weait.com] Sent: December 2, 2013 4:50 PM To: Connors, Bernie (SNB) Cc: Talk-CA OpenStreetMap Subject: Re: [Talk-ca] Problem with overpasses in NB?? On Mon, Dec 2, 2013 at 1:24 PM, Connors, Bernie (SNB) bernie.conn...@snb.ca wrote: Here is an example - http://osm.org/go/cgZ854R_8-- The problem is that there is an intersection node between McKinnon Road and Route 8 but there is an overpass bridge at this location. That does look like an error, I've fixed that one. The history on the involved objects is short, and suggests that it is an import. Do you want to contact the mapper and ask about the matter? ___ Talk-ca mailing list Talk-ca@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ca
