Re: [Talk-ca] Amateur Radio Maps...
I am not sure if this will help but Natural Resources Canada provides some free online tools for converting lat, lon to UTM: http://www.geod.nrcan.gc.ca/tools-outils/index_e.php -- Bernie Connors, P.Eng Service New Brunswick (506) 444-2077 45°56'25.21N, 66°38'53.65W www.snb.ca/geonb/ -Original Message- From: Colin McGregor [mailto:colin.mc...@gmail.com] Sent: Tuesday, 2011-12-13 16:41 To: talk-ca Subject: Re: [Talk-ca] Amateur Radio Maps... On Mon, Dec 12, 2011 at 2:20 PM, Stewart C. Russell scr...@gmail.com wrote: If anyone's confused about what these maps would look like, I have some examples here: http://glaikit.org/2011/12/11/not-really-getting-the-azimuthal-equidistant-projection-right/ They were made with the not-exactly free AZ_PROJ, a utility written entirely in PostScript. Okay, I have a pert of the answer here, the May and June 1979 issues of Byte Magazine, with a two part article on map making. So, I have the source code (written in BASIC, sigh) that will take a latitude / longitude and turn that into an X / Y point to be plotted. In other words I can now look at the math and logic of what needs be be done in the transformation... For a great (but non-free) example of a grey line (day/night) map, see http://pskreporter.info Cheers Stewart On 2011-12-12, at 9:23, Colin McGregor colin.mc...@gmail.com wrote: Last Saturday I was at a party co-hosted by Richard Weait (thanks), where the topic of maps for amateur radio use came up. A topic that has been of interest to me is amateur radio and disaster response. So, I am looking for software that will generate two maps from Open Street Map data: - An azimuthal equidistant projection map for any arbitrary latitude / longitude - A day and night map (ie: what parts of the world are CURRENTLY in sunshine / darkness) So, what makes the requirement for the above a little tough? I want the software to be under the GPL (or some other open license) so it can be redistributed without issue. I want it for Linux (so the OS to support the application can also be redistributed without issue). I want the application to run stand-alone (so if there is a problem with the internet connection I don't want the application to suddenly become useless). The data for this can not be more than a few MB at most (but then this shouldn't be an issue, given that road, rail, land use data is irrelevant for these apps, all that is needed is continental outlines, MAJOR lakes, rivers, islands and cities). So, why the interest in these maps? Many amateur radio antenna are directional (doing a better job of receiving (or transmitting) a signal in one particular direction). With an azimuthal equidistant projection map done for your location, you can draw a line from the center of the map to the location you are interested in and that will instantly tell you the direction to adjust your directional antenna. This is static map, as in you generate the map once for a given latitude / longitude you are effectively done. High frequency radio signals can refract off the ionosphere allowing very long range communications with low power transmitters. What frequencies refract well depends on a number factors, including sunshine / darkness. So knowing that the place you want to talk to is in darkness is useful. So, a day night map would have to be dynamic, being updated say once per minute ... Anyone with ideas as to where I could / should turn for the above? Thanks. Colin McGregor VE3ZAA ___ 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 ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Amateur Radio Maps...
Colin Geoweb Guru at url http://www.equal-area-maps.com/howto.php shows how to create Equal Area maps. It shows various mapping projection with Openlayers. This might interest you. See also http://www.geowebguru.com/articles/242-polar-maps-and-projections-part-1-overview http://www.equal-area-maps.com/polar/index.php where there is a link to an example map with Azimuthal equidistant. Pierre Béland Colin McGregor , 2011-12-12 09:23:46 Last Saturday I was at a party co-hosted by Richard Weait (thanks), where the topic of maps for amateur radio use came up. A topic that has been of interest to me is amateur radio and disaster response. So, I am looking for software that will generate two maps from Open Street Map data: - An azimuthal equidistant projection map for any arbitrary latitude / longitude - A day and night map (ie: what parts of the world are CURRENTLY in sunshine / darkness) ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Amateur Radio Maps...
On Mon, Dec 12, 2011 at 2:20 PM, Stewart C. Russell scr...@gmail.com wrote: If anyone's confused about what these maps would look like, I have some examples here: http://glaikit.org/2011/12/11/not-really-getting-the-azimuthal-equidistant-projection-right/ They were made with the not-exactly free AZ_PROJ, a utility written entirely in PostScript. Okay, I have a pert of the answer here, the May and June 1979 issues of Byte Magazine, with a two part article on map making. So, I have the source code (written in BASIC, sigh) that will take a latitude / longitude and turn that into an X / Y point to be plotted. In other words I can now look at the math and logic of what needs be be done in the transformation... For a great (but non-free) example of a grey line (day/night) map, see http://pskreporter.info Cheers Stewart On 2011-12-12, at 9:23, Colin McGregor colin.mc...@gmail.com wrote: Last Saturday I was at a party co-hosted by Richard Weait (thanks), where the topic of maps for amateur radio use came up. A topic that has been of interest to me is amateur radio and disaster response. So, I am looking for software that will generate two maps from Open Street Map data: - An azimuthal equidistant projection map for any arbitrary latitude / longitude - A day and night map (ie: what parts of the world are CURRENTLY in sunshine / darkness) So, what makes the requirement for the above a little tough? I want the software to be under the GPL (or some other open license) so it can be redistributed without issue. I want it for Linux (so the OS to support the application can also be redistributed without issue). I want the application to run stand-alone (so if there is a problem with the internet connection I don't want the application to suddenly become useless). The data for this can not be more than a few MB at most (but then this shouldn't be an issue, given that road, rail, land use data is irrelevant for these apps, all that is needed is continental outlines, MAJOR lakes, rivers, islands and cities). So, why the interest in these maps? Many amateur radio antenna are directional (doing a better job of receiving (or transmitting) a signal in one particular direction). With an azimuthal equidistant projection map done for your location, you can draw a line from the center of the map to the location you are interested in and that will instantly tell you the direction to adjust your directional antenna. This is static map, as in you generate the map once for a given latitude / longitude you are effectively done. High frequency radio signals can refract off the ionosphere allowing very long range communications with low power transmitters. What frequencies refract well depends on a number factors, including sunshine / darkness. So knowing that the place you want to talk to is in darkness is useful. So, a day night map would have to be dynamic, being updated say once per minute ... Anyone with ideas as to where I could / should turn for the above? Thanks. Colin McGregor VE3ZAA ___ 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
[Talk-ca] Amateur Radio Maps...
Last Saturday I was at a party co-hosted by Richard Weait (thanks), where the topic of maps for amateur radio use came up. A topic that has been of interest to me is amateur radio and disaster response. So, I am looking for software that will generate two maps from Open Street Map data: - An azimuthal equidistant projection map for any arbitrary latitude / longitude - A day and night map (ie: what parts of the world are CURRENTLY in sunshine / darkness) So, what makes the requirement for the above a little tough? I want the software to be under the GPL (or some other open license) so it can be redistributed without issue. I want it for Linux (so the OS to support the application can also be redistributed without issue). I want the application to run stand-alone (so if there is a problem with the internet connection I don't want the application to suddenly become useless). The data for this can not be more than a few MB at most (but then this shouldn't be an issue, given that road, rail, land use data is irrelevant for these apps, all that is needed is continental outlines, MAJOR lakes, rivers, islands and cities). So, why the interest in these maps? Many amateur radio antenna are directional (doing a better job of receiving (or transmitting) a signal in one particular direction). With an azimuthal equidistant projection map done for your location, you can draw a line from the center of the map to the location you are interested in and that will instantly tell you the direction to adjust your directional antenna. This is static map, as in you generate the map once for a given latitude / longitude you are effectively done. High frequency radio signals can refract off the ionosphere allowing very long range communications with low power transmitters. What frequencies refract well depends on a number factors, including sunshine / darkness. So knowing that the place you want to talk to is in darkness is useful. So, a day night map would have to be dynamic, being updated say once per minute ... Anyone with ideas as to where I could / should turn for the above? Thanks. Colin McGregor VE3ZAA ___ Talk-ca mailing list Talk-ca@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-ca
Re: [Talk-ca] Amateur Radio Maps...
If anyone's confused about what these maps would look like, I have some examples here: http://glaikit.org/2011/12/11/not-really-getting-the-azimuthal-equidistant-projection-right/ They were made with the not-exactly free AZ_PROJ, a utility written entirely in PostScript. For a great (but non-free) example of a grey line (day/night) map, see http://pskreporter.info Cheers Stewart On 2011-12-12, at 9:23, Colin McGregor colin.mc...@gmail.com wrote: Last Saturday I was at a party co-hosted by Richard Weait (thanks), where the topic of maps for amateur radio use came up. A topic that has been of interest to me is amateur radio and disaster response. So, I am looking for software that will generate two maps from Open Street Map data: - An azimuthal equidistant projection map for any arbitrary latitude / longitude - A day and night map (ie: what parts of the world are CURRENTLY in sunshine / darkness) So, what makes the requirement for the above a little tough? I want the software to be under the GPL (or some other open license) so it can be redistributed without issue. I want it for Linux (so the OS to support the application can also be redistributed without issue). I want the application to run stand-alone (so if there is a problem with the internet connection I don't want the application to suddenly become useless). The data for this can not be more than a few MB at most (but then this shouldn't be an issue, given that road, rail, land use data is irrelevant for these apps, all that is needed is continental outlines, MAJOR lakes, rivers, islands and cities). So, why the interest in these maps? Many amateur radio antenna are directional (doing a better job of receiving (or transmitting) a signal in one particular direction). With an azimuthal equidistant projection map done for your location, you can draw a line from the center of the map to the location you are interested in and that will instantly tell you the direction to adjust your directional antenna. This is static map, as in you generate the map once for a given latitude / longitude you are effectively done. High frequency radio signals can refract off the ionosphere allowing very long range communications with low power transmitters. What frequencies refract well depends on a number factors, including sunshine / darkness. So knowing that the place you want to talk to is in darkness is useful. So, a day night map would have to be dynamic, being updated say once per minute ... Anyone with ideas as to where I could / should turn for the above? Thanks. Colin McGregor VE3ZAA ___ 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
