Good idea Mike. If somebody want to look at this. A follow-up is coming where I give instructions for the Validation step where we will enhance the map. Pierre
De : Mikel Maron <mikel.ma...@gmail.com> À : "bgirar...@gmail.com" <bgirar...@gmail.com>; spatialbits <spatialb...@posteo.net>; "hot@openstreetmap.org" <hot@openstreetmap.org> Envoyé le : Dimanche 15 mars 2015 9h12 Objet : Re: [HOT] Identification of Communication towers We could make a quick tracing guide for these towers. Just need a few clipped screenshots of the imagery, and help text. Would put it together in something like this: http://hotosm.github.io/tracing-guides/guide/kulna.htmlhttp://hotosm.github.io/tracing-guides/ -Mikel * Mikel Maron * +14152835207 @mikel s:mikelmaron On Sunday, March 15, 2015 9:03 AM, Blake Girardot <bgirar...@gmail.com> wrote: Hi Martin, These are challenging to spot and hard to tag correctly without local knowledge I just discovered. http://wiki.openstreetmap.org/wiki/Tag:man_made%3Dcommunications_tower I usually find towers by seeing the shadow they cast, that is the big indicator to me. Here are a few examples in the region: https://www.openstreetmap.org/#map=19/-21.90198/166.072485 If you look very carefully at the shadow you can see the microwave transceiver drums in the shadow. I would guess that is what helped the person identify this one as a "communications" tower specifically. ---------------------------- https://www.openstreetmap.org/#map=19/-20.748846/167.262194 That one again, shows the shadow being a pretty big factor. And it also show a typical service road and pad. I do not know how the mapper knew it was a communications tower. ------------------------------ https://www.openstreetmap.org/#map=19/14.977132/120.52743 Shadow and microwave drums visible ----------------------------------- https://www.openstreetmap.org/#map=20/15.011183/120.532604 Shadow and service area fenced off. ---------------------------------- https://www.openstreetmap.org/#map=19/15.097711/120.611481 A nice big TV transmission tower. I hope those help! Cheers, Blake On 3/15/2015 11:37 AM, spatialbits wrote: > Hi hotties, > > as part of tasks #944/943 (Vanuatu) mapping of Communication towers is > requested. > Could someone point me to an example in the imagery (e.g. lat/lon), so I > get an idea on what to look for. > > Thanks. > > Martin > > _______________________________________________ > HOT mailing list > HOT@openstreetmap.org > https://lists.openstreetmap.org/listinfo/hot > _______________________________________________ HOT mailing list HOT@openstreetmap.org https://lists.openstreetmap.org/listinfo/hot _______________________________________________ HOT mailing list HOT@openstreetmap.org https://lists.openstreetmap.org/listinfo/hot
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