Re: [Talk-ca] Callsigns...
On Sun, Mar 10, 2013 at 8:41 PM, James Ewen ve6...@gmail.com wrote: On Sun, Mar 10, 2013 at 5:28 PM, Colin McGregor colin.mc...@gmail.com wrote: This past weekend I did add the tag tower:type communications to the CN Tower, but I want to add the station transmitter information... Probably the only real issue is finding an unencumbered source of station transmitter information. Wikipedia says that the text is available under Creative Commons Attribution-ShareAlike License, but was the information included there derived from an open source? Broadcaster data is part of the public record, Industry Canada has downloadable data here: http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/h_sf09484.html (at the moment I don't have a machine that can deal with MapInfo files so I 'm not sure what data is included and I'm not sure what sort of license the data is released under...). -- James VE6SRV ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Callsigns...
On Mon, Mar 11, 2013 at 5:49 AM, Colin McGregor colin.mc...@gmail.com wrote: Broadcaster data is part of the public record, Industry Canada has downloadable data here: http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/h_sf09484.html (at the moment I don't have a machine that can deal with MapInfo files so I 'm not sure what data is included and I'm not sure what sort of license the data is released under...). As there already is a database available with the relevant information, I'd voice my usual objections towards importing this data into OSM. The data is not verifiable on the ground (well, I guess it theoretically is if you had appropriate measuring equipment, but still...) and probably changes somewhat frequently, making the data in OSM difficult to maintain properly. So I don't see the added benefit of having the data in OSM. Cheers, Harald. -- Please use encrypted communication whenever possible! Key-ID: 0x34cb93972f186565 ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Callsigns...
On 11-03-13 05:49 , Colin McGregor wrote: Broadcaster data is part of the public record, Industry Canada has downloadable data here: http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/h_sf09484.html (at the moment I don't have a machine that can deal with MapInfo files so I 'm not sure what data is included and I'm not sure what sort of license the data is released under...). In the absence of any statement to the contrary, it will be Crown Copyright. I got a hearty No! when I asked about Spectrum Direct data, at http://www.ic.gc.ca/eic/site/sd-sd.nsf/eng/home (which is okay by me, since the Spectrum Direct data is in such a vile format that I'd never want to be responsible for converting it to anything really useful.) cheers, Stewart ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Callsigns...
On Mon, Mar 11, 2013 at 5:15 AM, Harald Kliems kli...@gmail.com wrote: As there already is a database available with the relevant information, I'd voice my usual objections towards importing this data into OSM. The data is not verifiable on the ground (well, I guess it theoretically is if you had appropriate measuring equipment, but still...) Since Colin is talking about the broadcasters, it is pretty easy to have appropriate equipment to verify the frequency... a TV or radio will do that. You can locate the source with a little more equipment, like a directional antenna, and some attenuation. You can get the owner and callsign from listening to the broadcast. Power levels are a little harder to determine remotely though. and probably changes somewhat frequently, making the data in OSM difficult to maintain properly. The local TV and radio stations in my area don't change frequency very often. Many of the radio stations have been on the same frequency and callsign for decades. TV frequencies changed recently due to new regulations, but before that they too were static for many decades. Even when you get into commercial radio the frequencies and callsigns don't change often. Changing a frequency on a radio repeater means changing all the users on that system, a task that isn't undertaken on a whim. Industry Canada assigns the frequencies to the users, and it is a bit of a bear to change frequency assignments. So I don't see the added benefit of having the data in OSM. It's one of those things where the data is of interest to some people and not others. I work in commercial radio, and I have thought about adding radio towers to the database, with frequency assignments etc. It would be very handy for my purposes. My employer might not like me posting all of our frequencies and tower locations though... Not really sure since Spectrum Direct allows people to look up the information anyway. It is always difficult to know what information is of benefit to the OSM database as that is a subjective judgement call. Addresses might be of little use to some users, yet they still are being added to the database. Does their inclusion benefit the database? What percentage of potential users need to require the data before it becomes a benefit? If the data is not included in the database, then potential users of the data won't look at the OSM dataset as a source. If however the data is included in the database, potential new users may be drawn to the dataset. It's the old chicken vs. the egg situation, a catch-22. -- James VE6SRV ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Callsigns...
On Sun, Mar 10, 2013 at 5:28 PM, Colin McGregor colin.mc...@gmail.com wrote: This past weekend I did add the tag tower:type communications to the CN Tower, but I want to add the station transmitter information... Probably the only real issue is finding an unencumbered source of station transmitter information. Wikipedia says that the text is available under Creative Commons Attribution-ShareAlike License, but was the information included there derived from an open source? -- James VE6SRV ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Callsigns...
Well the first challenge would be putting multiple tags on the same way. Personally I would create multiple relations using the same way, each relation having one call-sign. I have heard other people suggest separating values with commas but I don't like that idea because if for example you want to put the frequency and the name, if the values are separated by commas there is no way to match the frequency to the specific name. A relation would allow you to do this. (Obviously this is my own opinion up for argument) In terms of a tagging scheme http://wiki.openstreetmap.org/wiki/Key:frequency for the frequency name:xxx for the name of the station http://wiki.openstreetmap.org/wiki/Operator for the operator Might have to propose some tags for the others On Sun, Mar 10, 2013 at 8:28 PM, Colin McGregor colin.mc...@gmail.comwrote: For various reasons I've taken an interest in the locations of TV (and to a lesser degree radio) station transmitter sites (the studios often being a number of km. from the transmitter location(s)). Is there a standard way to enter this into Open Street Map? A specific example that I am interested in is the CN Tower, which I would gather from Wikipedia (http://en.wikipedia.org/wiki/CN_Tower#Television_broadcasters) is home to 7 different TV station transmitters, 10 FM broadcast transmitters, plus several utility broadcasters (cell phone, pager services, among others). This past weekend I did add the tag tower:type communications to the CN Tower, but I want to add the station transmitter information... Thanks. Colin McGregor ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
