[Talk-ca] Determining The Identity Of Features
Hi there, I've been doing a bit of mapping for the project in the UK, adding some roads and trails generally from my area of mid-Wales. We have a bit of a copyright problem with "naming" features in the UK that we have actually surveyed. You can see the question and the responses on this link: http://help.openstreetmap.org/questions/1286/determining-the-identity-of-features. The government is being a bit more open and has released some data but there seems to be some discussion about a possible conflict between its licence and the OSM licence. I'm in Canada for a while and thought I'd map some trails while I'm here per your WikiProject Canada page. I'm hiking in Provincial Parks and National Parks in BC at the moment. I guess there will also be Regional Parks. At the trailhead there are generally maps naming the trails and features. Having hiked and tracklogged the trail am I permitted to "name" the trail or feature in OSM from the information found at the trailheads? (Or do I ask somebody who looks at the sign at the trailhead and then tells me?!!!?) Also I'm aware that NRCan has released a huge amount of data for use. Can I similarly "name" features from information obtained from those sources, e.g. the Topo tiffs? The reason I ask here is that I know that you guys (authorities!) seem somewhat open about copyright licensing and the uses to which official cartographic data is put and some guidelines for me would be great. Thanks for your time... ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
[Talk-ca] Simplifying CanVec imports
Good Morning Everyone, For the past couple of weeks I have been importing CanVec data into an area southwest of Kamloops. There was very little (if any) existing OSM data in the area. I've gotten into a bit of a rhythm, merging and stitching all of 92I07 and about half of 92I10 but started becoming concerned about the high data density, particularly associated with streams in the area. Most import files at the level of 92 I 07.0.0 for example, are runnning 10-15k nodes. At that rate, that is somewhat near 200,000 nodes for an area at the level of 92I07. Yikes! I guess the question in my mind is just how many data do we want to import at this level and what are the practical implications for server processing and overload. I expect that this level would be fairly consistent across most of Western Canada. Even now, I haven't been able to call up a complete map in the openstreet.org view tab for the past 4 or 5 days... 25-50% of the map being covered with "... more OSM coming soon" tiles. I looked at the Simplify Way function in JOSM and applying it to just the water data, have been able to eliminate 5-8k nodes from each file, thereby cutting the data in nearly half. I really don't see any significant degradation in the map quality as a result. Without simplifying, the data nodes in some places are incredibly (and undeservedly ) dense. The only discussion I've been able to find on the simplify tool is some rather old discussion that took place during development. So just wondering if simplifying these data is a reasonable approach. Right now, I am going back to the imported areas, calling them up from OSM, simplifying the water, and re-uploading the simplified data. In the future, I will just simplify in JOSM before uploading the file in the first place. Anyway, does anyone have any issues with my approach here? Is it worth simplifying or am I being overly concerned about data density and its longer term implications? Thanks, Sam Longiaru Kamloops, BC ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
[Talk-ca] local OSM groups
Hi all, Matthias Meißer has made it easier to find a local OSM group. The German OSM community has had a map of local groups for quite a while. Matthias has extended that tool to work on a global scale. Here is how it works. 1) Local groups add a local group template to their wiki page. This should be a place wiki page for that area. Fill in the details on the template. 2) The local user group bot collects the template data from the wiki once a day or so. 3) User groups appear on the map with link information to their authoritative source. This works if you are organizing your local group on the OSM wiki, on Facebook or Meetup or elsewhere[1], but allows everybody to go to one source to find all local groups. That's good. But it only works if you have added a template for your local group. So go add a template for your group! ;-) The German map with all of the German local groups to envy, is here. http://www.openstreetmap.de/ The template information is here. http://wiki.openstreetmap.org/wiki/Template:User_group The new global OSM group map is here. http://ikaria.informatik.uni-rostock.de/mm337/osm/usergroups/ And a minimal page example using the local group template plus the place template, is here. http://wiki.openstreetmap.org/wiki/Waterloo_region [1] These external links are not yet displayed, but that bug has been reported and is being fixed Real Soon Now. ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
