- 1 grade=1..5
- 2 non-tracks
- 3 How to tag mixed tracks?
- 4 What is the meaning of a grade list?
- 5 Rendering
- 6 Classification of 'heavily compacted hardcore'
- 7 Increasing flexibility
- 8 Rendering and grades
- 9 Rendering when its not a track
- 10 Surface from taginfo today
- 11 Remove "subtle on the landscape" for grade5
- 12 Dirt roads in arid mountains
Why is 'track' in the key and 'grade' in the value? Wouldn't it be more logical to use: grade=1..5. For me that makes much more sense. We already know it is about a track.
- Indeed! What about paths? Also there grade=2 would be usefull. I vote for changing that! --Derstefan 18:03, 9 April 2011 (BST)
- I guess, it's hard, given the name to apply it on unclassified or path or anything else than track. Other proposals are on their ways to enhance this one Sletuffe 16:37, 12 December 2008 (UTC)
- The problem is: Highways as on the photo are widely used as interconnections between towns/villages/hamlets. So they are both tertiary roads (function) and tracks (quality). -- Smial 09:01, 16 December 2008 (UTC)
- tracktype is definitely allowed on any form of highway, although obviously it makes sense more on some (e.g. bridleway) than others (motorway)! There are lots of occurrences of tracktype with footway and bridleway in the database, please don't try and redefine this via the wiki. --Richard 10:34, 16 December 2008 (UTC)
- Sounds reasonable, thx. .oO(smoothness=axle_breaking..... :-)) -- Smial 13:17, 16 December 2008 (UTC)
- No it's not allowed on any form of highway, such as a bridleway or footway. It's for tracks. Tracktype states 2 things. 1. it's a track. 2. the phisical charactoritics of that track. The whole point (which was stated in the original proposal, as well as being accompanied with a diagram) is that it replaces the need for highway=track. If it states thigns about the 'track' we know its a highway=track so that isn't needed. This then frees up the highway key for adding things such as highway=footway with tracktype=grade3. rows and phisical routes can then both be added, rather than the compramise of only putting 'some' data into osm, which in relation to the UK becomes near meaninless. The reason it is still currently used with highway=track is simply because thats what the 2 rendering programs used, not becasue of proposals/discussions/agreements, which is what this should be, and I wish OSM would be all about. pathtype seems to have been used on occasion (looking at tagwatch). Maybe the combining of 2 into 1 is just too hard to grasp in OSM? in which case tracktype may as well be surface=grade1-5 and route=track/path added with it. It would be exactly the same, but just take twice as long to map it..but at least it would stop the same question over and over. Ultimate simplicity rather than any efficiency. Ben 00:57, 27 January 2009 (UTC)
- Sounds reasonable, thx. .oO(smoothness=axle_breaking..... :-)) -- Smial 13:17, 16 December 2008 (UTC)
- If you look at the original Proposal, it is clearly only intended for tracks. I also noted that many renderers and editors will assume that anything with a tracktype is a track and not evaluate the highway tag in this case. This implies that the authors of those tools believe that tracktype occurs only for tracks which is in agreement with the tracktype proposal.
- The English version of this page states nothing about highway, but the German version correctly states that it is only for tracks. --Nop 10:24, 20 August 2009 (UTC)
. ways track path foot cycle bridl servic residen steps unclas ford road grade1 179873 168996 1069 1058 1437 2 2107 2361 63 2350 7 71 grade2 206410 199222 1817 1369 666 27 1165 1118 51 572 26 54 grade3 190677 185317 2412 927 202 75 628 525 86 222 29 19 grade4 127257 123000 2644 763 63 86 213 158 60 76 18 11 grade5 96200 91805 3248 650 35 70 72 80 37 34 26 8 Sum 800417 768340 11190 4767 2403 260 4185 4242 297 3254 106 163 of 911076 238601 458375 81760 2639 398567 1159538 59142 200069 306 24043 in % 84% 5% 1% 3% 10% 1% 0% 1% 2% 35% 1%
32047x tracktype at non-tracks, nearly 4% of tracktypes. At bridleways and paths (a lot of paths might be cycleways using path/designated-modell) it is used in a large number.
For practical mapping tracktype is used in a relevant number for non-tracks, too. This use can't be ignored or called as not allowed. A rough classfication of possibly mostly ways outside residential areas seems to be necessary for a lot of mappers. --Mueck 11:45, 8 August 2010 (BST)
- In the UK a footway is a right to tread foot..on that way! So a track is a footway. so Tracktype=grade1 highway=footway is normal, and the whole point of this tag. Physically however a footway is not a track. So unless it's a legal right it's a contradiction, and therefore it can be called as not allowed, just as me saying highway=footway footway=no isn't allowed, becuase it's a contradiction. It's not allowed by 'logic'..not by OSM. In most countries footways are just paths. The tag has a different usage, and this isn't an issue, but...tracktype does then clash with it, becuase they are 2 contradicting physical descriptions...and NOT 1 physical and 1 access description as in the UK. Ben 01:18, 5 October 2010 (BST)
How to tag mixed tracks?
How do you tag a track where the tracks themselves are built with concrete, tarmac or pavement but the center is of a softer quality? I always tag them as grade1 by the hard material you drive on, but it seems there are other philosophies. --Nop 10:20, 20 August 2009 (UTC)
- grade 1. Can't be anything else and not contradict the descriptions. Ben 13:54, 6 January 2010 (UTC)
What is the meaning of a grade list?
In TagWatch there are many mixed tracktypes like "grade3;grade5" or "grade3; grade1; grade2". I have no idea what this is supposed to mean. Except that it is ignored by the renderers. Any ideas what the intention of these is? --Nop 10:20, 20 August 2009 (UTC)
- It means the person who mapped it, either doesn't now, or the track varies, and they havn't split up the data accordingly. It should really be one grade with additional notes=. Ben 13:55, 6 January 2010 (UTC)
- If two tracks are joined, then such values may appear ... --Mueck 01:22, 8 August 2010 (BST)
grade4 and grade5 are rendered with a slightly thicker line than grade3. This makes them more visible on the map, especially grade4 looks much stronger than grade3. Could you make lines thinner for grade4 and grade5? Also grade4 should rather be rendered with only short dashes (of length between grade3 and grade5) and not as dot-dash. And for grade5 the dashes should be even shorter - dot-like. Possible? Thanks in advance. -- *Martin* 7 November 2010
Classification of 'heavily compacted hardcore'
Today a track wirh a surface of 'heavily compacted hardcore' is classified as 'grade1'. Tracks with 'grade2' have a surface of gravel, which can also be heavily compacted. Then a heavily compacted gravel means 'grade1' and a loosely compacted gravel means 'grade2'? I think this difference is very difficult to determine. I suggest to remove the terminus 'heavily compacted hardcore' from 'grade1' and replace it with 'smooth surface' or something like that. --Rudolf 07:03, 12 July 2012 (BST)
Hi, I am interested in some feed back from people who consider they have some "ownership" of the tracktype tag. There has been some discussion in the Australian mailing list about how to deal with 4x4 tracks and even rougher roads. Prompted, to some degree by the excellent routing software now appearing and using OSM. Potential for some nasty situations exist. http://wiki.openstreetmap.org/wiki/Australian_Tagging_Guidelines actually says that tracktype is not suited to Australian conditions, I am not so sure and think it could be easily extended to meet our needs as well.
So, if you have an interest in tracktype, and may well have a watch set on this page, would you support the following -
- extending the existing five grades, adding grade6 and grade7 (or better still, 4wd_recommended and 4wd_only) to cover more extreme roads than tracktype currently addresses. At present the preferred way to render such a tag would be by appending, eg, "(4x4 only)" to the road name. This is consistent with how many maps are printed and is familiar to map users.
- encouraging render engines to understand that tracktype applies to roads other than highway=track. In Australia, and many other parts of the world, there are quite important roads, connection population centers that need to be marked in a way to warn (eg) visitors to the region that they are not suitable for a conventional car. The highway= tag tells us the purpose of a road, tracktype needs to warn us about its likely condition.
- Important ! Encourage people making routing engines to tread very carefully when sending unsuspecting motorists down every road in OSM.
Its worth noting that these matters really do potentially have life threatening aspects. Sadley this has been proven on many occasions and no one wants OSM mentioned in that sort of context.
--Davo 02:44, 28 October 2012 (UTC)
Sadly, noting no response to this message we have decided on a somewhat simpler and weaker solution. Suggest people mapping 4x4 tracks consider marking them as grade6, grade7 or grade8 (ie 4x4 recommended, 4x4 required, extreme 4x4). Maybe, if this becomes more widely used, we can formalize it. I will make a brief suggestion to that effect on the tracktype page if I hear no objections. --Davo 05:02, 29 December 2012 (UTC)
- Tracktype has been about the "softness" or "builtness" of the material, not about usability, even if there's a loose correlation between the two - for some road vehicles. Alv 09:05, 29 December 2012 (UTC)
- Thanks Alv, good to know someone is watching ! The main page says "Tracktype is a measure of how well-maintained a track or other minor road is", thats actually the most important information for someone considering using a particular road or a renderer considering sending some poor unsuspecting soul down it. There would be a pretty tight correlation between 'maintained' and 'usability' IMHO. Not perfect I agree but best we have. Especially important in those parts of the world where there are a lot of roads like we are talking about. --Davo 01:09, 2 January 2013 (UTC)
Rendering and grades
Grades... Single track and double track? Very useful, eg. double track, a car can use it - single track, a car can not. (Footpath, cycleway and bridleway by title would seem to exclude motorbikes!) Maybe this comment should go under highway rather than tracktype though...
Also agree with comments for further grades for 4x4... It's not just about how well the track is maintained/quality of surface, e.g. a part compacted mixed surface track on the flat may be fine for a 2wd car - but not if it's on a steep slope.
Just to add, re. the rendering comment above, yes - the rendering difference between the grades doesn't always help with the impression of a decrease in quality of track. This could be done better with dash width and spacing.
Rendering when its not a track
I note someone has removed referance to renders only observing this tag on tracks. The referance used to point out that is not the intention of this tag, it can be applied to any (minor ?) road AND should be so rendered. The fact that the OSM 'official' render does not use this tag on important roads is a serious omission and no amount of editing history will hide that fact. I raise this point because badly rendered maps put lives at risk. I can demonstrate many cases of people dying in the Australian Outback because they were using poor maps. Fortunatly, so far, an OSM map has not been so involved.
This may not be an issue in Western Europe or North America but the world is a bigger place than that. I will put that referance back if no one objects.
Following some prompting on the mailing list, I have put back the note about rendering on other than tracks.
Surface from taginfo today
Just a quick manual summary about grades and surfaces: (above 1%)
|grade1||asphalt 12%, paved 12%, concrete 3%, ground 1%, ...|
|grade2||gravel 19%, unpaved 7%, ground 4%, compacted 1.5%, paved 1%, ...|
|grade3||ground 11%, gravel 8%, unpaved 2%, grass 1%, dirt 1%, sand 1%, ...|
|grade4||ground 13%, grass 10%, dirt 3%, gravel 2%, unpaved 1%, sand 1%, ...|
|grade5||grass 17%, ground 8%, unpaved 4%, dirt 2%, sand 1%, ...|
Remove "subtle on the landscape" for grade5
- +1 - Haribo (talk) 16:08, 27 July 2015 (UTC)
- Yes, it makes sense Mateusz Konieczny (talk) 06:50, 28 July 2015 (UTC)
- done--Jojo4u (talk) 21:16, 14 April 2016 (UTC)
Dirt roads in arid mountainshere. Some may be usable by normal car, but most only by trucks (pickups, 4WD). The better ones are used several times a day und thus smoothened by use. During rain they may be damaged by erosion and have to be repaired (filled with gravel), the more important ones first of course. I guess its the same everywhere in remote Mediterranean areas.
Currently in OSM all tracktypes from grade2 to grade4 are used for these tracks. From a practical point of view I would use 3 (for the better ones) or 4 (the awful ones, trucks only), but grade2 IMHO is ridiculous. Any opinions? --GerdHH (talk) 09:19, 13 April 2016 (UTC)