[talk-au] tagging the source of edits
I have some questions about using the source tag. If an existing way was marked as source:yahoo, but I made some minor alterations from nearmap imagery what should I do to the source? Should I leave it as source:yahoo and add source:nearmap to the changeset? Or should I change the source:yahoo to source:nearmap? Or should I add a source:nearmap resulting in two source tags? Also if I add a node to a way and tag that node as a highway:crossing positioned by nearmap imagery, should I just add source:nearmap to that new node? I ask because I came across I crossing node with no source tag, so I'm not sure if this implies the source was the same as the way that the node is on (survey) or was the source tag accidentally left off, or is the source tag not really needed for something minor like that? Sorry if this is not the place to ask these questions. ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] tagging the source of edits
On 27 July 2010 21:07, Andrew Harvey andrew.harv...@gmail.com wrote: If an existing way was marked as source:yahoo, but I made some minor alterations from nearmap imagery what should I do to the source? Should I leave it as source:yahoo and add source:nearmap to the changeset? Or should I change the source:yahoo to source:nearmap? Or should I add a source:nearmap resulting in two source tags? You can't add 2 source=* tags, you can do source=yahoo;nearmap, but in general it's best to do source=nearmap because the yahoo imagery isn't aligned in some places properly and is out of date in others. ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] tagging the source of edits
Also if I add a node to a way and tag that node as a highway:crossing positioned by nearmap imagery, should I just add source:nearmap to that new node? I ask because I came across I crossing node with no source tag, so I'm not sure if this implies the source was the same as the way that the node is on (survey) or was the source tag accidentally left off, or is the source tag not really needed for something minor like that? If you add a highway=crossing from nearmap then it should be source=nearmap. That's the source of the infomation. As you've suggested a node, as part of a way, with some sort of information without it's own source tag inherits the way's source tag. As John suggested if you modify a way that was tagged source=yahoo using nearmap then it should be changed to source=nearmap. It's no different to changing from source=yahoo to source=survey when updating to something that is now gps traced. I'd be cautious about changing anything that is source=survey (gps or otherwise) though to source=nearmap. I have done this in a couple of places but it's thing's like a road being made dual carriage way when it was originally a single carriageway, or the addition of a roundabout. -- Cheers Ross ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] tagging the source of edits
On 27 July 2010 22:54, Ross Scanlon i...@4x4falcon.com wrote: I'd be cautious about changing anything that is source=survey (gps or otherwise) though to source=nearmap. I have done this in a couple of places but it's thing's like a road being made dual carriage way when it was originally a single carriageway, or the addition of a roundabout. source=survey is slightly ambiguous, as that might refer to the source of the name, not the source of the location data, and you usually get better turn, intersection and curve data from Nearmap than any consumer grade gps... ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] tagging the source of edits
On Tue, 27 Jul 2010 23:27:19 +1000 John Smith deltafoxtrot...@gmail.com wrote: On 27 July 2010 22:54, Ross Scanlon i...@4x4falcon.com wrote: I'd be cautious about changing anything that is source=survey (gps or otherwise) though to source=nearmap. I have done this in a couple of places but it's thing's like a road being made dual carriage way when it was originally a single carriageway, or the addition of a roundabout. source=survey is slightly ambiguous, as that might refer to the source of the name, not the source of the location data, and you usually get better turn, intersection and curve data from Nearmap than any consumer grade gps... Yes. But I'd still be cautious about changing it without any other reference. -- Cheers Ross ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] tagging the source of edits
If there's a way tagged: highway=residential name=Leigh Street source=survey And the positioning is obviously sub-standard (such as a single node for a 90 degree turn, where the street actually curves with a radius of 10 to 20 metres), I would add, say, 4 more nodes to approximate the curve in the road, and change the tagging on the way to: highway=residential name=Leigh Street source:name=survey source=nearmap ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] tagging the source of edits
On Tue, 27 Jul 2010 06:52:01 -0700 (PDT) Simon Biber simonbi...@yahoo.com.au wrote: If there's a way tagged: highway=residential name=Leigh Street source=survey And the positioning is obviously sub-standard (such as a single node for a 90 degree turn, where the street actually curves with a radius of 10 to 20 metres), I would add, say, 4 more nodes to approximate the curve in the road, and change the tagging on the way to: highway=residential name=Leigh Street source:name=survey source=nearmap +1 -- Cheers Ross ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] tagging the source of edits
As John suggested if you modify a way that was tagged source=yahoo using nearmap then it should be changed to source=nearmap. It's no different to changing from source=yahoo to source=survey when updating to something that is now gps traced. Okay, the only reason I was unsure is because if you only change part of the way from nearmap imagery then you have part sourced from nearmap, and part sourced from yahoo or survey. ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] tagging the source of edits
On 28 July 2010 08:28, Andrew Harvey andrew.harv...@gmail.com wrote: Okay, the only reason I was unsure is because if you only change part of the way from nearmap imagery then you have part sourced from nearmap, and part sourced from yahoo or survey. In that case, while far from ideal, but more accurate, you could split the way you fixed and update the source tag for that section. ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
[talk-au] Direction of flow, rivers and streams
I note the wiki says that Direction of the way should be downstream. Most streams I look at on OSM have been drawn uphill, and I've been reversing the direction of ones I notice as wrong. Indeed, I find it more natural to draw streams that way myself, and then reverse them. This is just to point out the direction issue to those who may have missed it. John H ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] Direction of flow, rivers and streams
On 28 July 2010 13:39, John Henderson snow...@gmx.com wrote: Most streams I look at on OSM have been drawn uphill, and I've been reversing the direction of ones I notice as wrong. Indeed, I find it more natural to draw streams that way myself, and then reverse them. Sometimes it's hard to figure out which way the water flows in creeks etc, that is unless you are mapping them to the mouth of that water way etc... ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
Re: [talk-au] Direction of flow, rivers and streams
On Wed, Jul 28, 2010 at 1:39 PM, John Henderson snow...@gmx.com wrote: I note the wiki says that Direction of the way should be downstream. Most streams I look at on OSM have been drawn uphill, and I've been reversing the direction of ones I notice as wrong. Indeed, I find it more natural to draw streams that way myself, and then reverse them. Yep, the only way to draw them facing downstream is to start at the source, and that's pretty hard. I usually find them where they join another river, so am probably contributing to the backward mapping. Anyone know of any applications that use the direction of streams? Steve ___ Talk-au mailing list Talk-au@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-au
