Re: [OSM-talk-ie] Where's the coastline?
I'm in two minds about it myself, I guess I would lean towards the Ordinance Survey map since you could argue there is some vegetation there. I personally would mark it inside the coastline and as wetland=tidalflat. Dafo Date: Sat, 6 Jun 2015 17:13:33 +0200 From: molto...@gmail.com To: talk-ie@openstreetmap.org Subject: Re: [OSM-talk-ie] Where's the coastline? On 06/06/2015, Killian Driscoll killiandrisc...@gmail.com wrote: Hi, maybe I'm getting the wrong end of the stick, but why try and reinvent the wheel when you can just compare how the land or water is already interpreted It's more important to be self-consistent than to follow another project's lead, even a well-respected one. Or to phrase it differently, sticking with your decision is more important than what your actual decision is. That said, I think that the coastline is at mean high-water spring tide principle is the most common (sometimes using high-water mark instead, which is close enough). look at the EPA map http://gis.epa.ie/Envision / http://wiki.openstreetmap.org/wiki/Corine_Land_Cover and see what is land, transitional waterbody, coastline. AFAIU Corine doesn't have a notion of coastline the way OS does. It just deals with landcover, and categorizes those as salt marsh, which is an easy decision in OSM too. The OSi map on that website shows the north part of the wetland as land and the south part as water, which is really bogus and a nice example of the official government-funded maps not always being the best :p ___ Talk-ie mailing list Talk-ie@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ie ___ Talk-ie mailing list Talk-ie@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ie
[OSM-talk-ie] Overpass / relation issue
Hi, I am have a small issue with an overpass / relation issue, someone might be able to point me in the right direction... I have a geojson file containing the borders of all the counties in the republic. I extracted from OSM a few years back, I think I used XAPI to extract and did some conversion/flattening but I'm not 100% sure of the process. I now need all the counties in Ireland (the Island) and was trying to export these via Overpass Turbo, I thought I had it working but have hit a bit of an issue. My query and export go fine as does the conversion from json to geojson (using osmtogeojson), but I am ending up with a geojson file with ~9k features, where I was expecting 32. The overpass query returns 32 relations (as expected) and 9735 ways (which I presume make up the border), I know I am doing something wrong but I am not too sure if it is with my overpass query or my processing of the result set. Any pointers would be great, I have included the query below, it can also be viewed at http://overpass-turbo.eu/s/9N3 Thanks in advance, Keith [out:json][timeout:900]; ( area[name=Republic of Ireland]; area[name=Northern Ireland]; ); relation(area) [boundary~administrative|historic] [admin_level=6]; (._;;); out; ___ Talk-ie mailing list Talk-ie@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ie
Re: [OSM-talk-ie] Where's the coastline?
On 06/06/2015, Killian Driscoll killiandrisc...@gmail.com wrote: Hi, maybe I'm getting the wrong end of the stick, but why try and reinvent the wheel when you can just compare how the land or water is already interpreted It's more important to be self-consistent than to follow another project's lead, even a well-respected one. Or to phrase it differently, sticking with your decision is more important than what your actual decision is. That said, I think that the coastline is at mean high-water spring tide principle is the most common (sometimes using high-water mark instead, which is close enough). look at the EPA map http://gis.epa.ie/Envision / http://wiki.openstreetmap.org/wiki/Corine_Land_Cover and see what is land, transitional waterbody, coastline. AFAIU Corine doesn't have a notion of coastline the way OS does. It just deals with landcover, and categorizes those as salt marsh, which is an easy decision in OSM too. The OSi map on that website shows the north part of the wetland as land and the south part as water, which is really bogus and a nice example of the official government-funded maps not always being the best :p ___ Talk-ie mailing list Talk-ie@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ie
Re: [OSM-talk-ie] bridges
On 07/06/2015, Caroline Lewis carolinele...@eircom.net wrote: not sure how to add bridges correctly - i split at the two nodes that define the bridge , add bridge tag and then should i also tag as layer = 1? Yes that's basicly it. The layer tag says which way is above the other. You can add layer=* to either way (or both) but a rule of thumb is to add it to the shortest way (usually the bridge). http://wiki.openstreetmap.org/wiki/Bridge has some more info. The bridge and the underlying waterway/rail/etc shouldn't share a node, which can be annoying when maping townlands that follow both the bridge and the waterway. In those case, you should use an extra way just for the townland boundary. For example http://www.openstreetmap.org/way/273846258 or http://www.openstreetmap.org/way/344169613 ___ Talk-ie mailing list Talk-ie@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ie
Re: [OSM-talk-ie] bridges
To make it easier, go to preferences, and look for tag presets. Activate one click features or something named similar to that (sorry, afk so can't give you step by step guide on this bit). Once done, in the main josm screen, right click on the toolbar and edit it to add the one click bridge option. From now on just split the road, select the split piece and click the button and the tags for bridges that way. I have imagery layers, addressing plugins, often used tags etc all on the toolbar. Makes it much quicker rather than trying to remember tags or search through menus Dave On 7 Jun 2015 00:15, moltonel 3x Combo molto...@gmail.com wrote: On 07/06/2015, Caroline Lewis carolinele...@eircom.net wrote: not sure how to add bridges correctly - i split at the two nodes that define the bridge , add bridge tag and then should i also tag as layer = 1? Yes that's basicly it. The layer tag says which way is above the other. You can add layer=* to either way (or both) but a rule of thumb is to add it to the shortest way (usually the bridge). http://wiki.openstreetmap.org/wiki/Bridge has some more info. The bridge and the underlying waterway/rail/etc shouldn't share a node, which can be annoying when maping townlands that follow both the bridge and the waterway. In those case, you should use an extra way just for the townland boundary. For example http://www.openstreetmap.org/way/273846258 or http://www.openstreetmap.org/way/344169613 ___ Talk-ie mailing list Talk-ie@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ie ___ Talk-ie mailing list Talk-ie@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ie
[OSM-talk-ie] bridges
still at correcting a tile for cork co. [which is taking so long as roads etc are v misaligned and streams missing ] but not sure how to add bridges correctly - i split at the two nodes that define the bridge , add bridge tag and then should i also tag as layer = 1? hopefully will be able to map more cork townslands soon :) ___ Talk-ie mailing list Talk-ie@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-ie
