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Hello Brad,<br><br>
<x-tab> </x-tab>Sorry to
be slow on this, lots to keep up with.<br><br>
<x-tab> </x-tab>In terms
of helicopter flight hazards, it wouldn't really be necessary to map all
the power lines, end to end. The hazards are primarily where the
power lines cross valleys or gorges. Marking only those types of
sites may save a lot of time.<br><br>
<x-tab> </x-tab>In
addition, if the pilot has to scan the whole powerline map to assess for
hazards, that is not much help overall. Our aviation charts do show
power lines but also show the crossings with tower symbols.<br><br>
<x-tab> </x-tab>Also worth
mapping are communication towers. These can prove quite a threat in
poor weather, especially if not lighted or marked.<br><br>
<x-tab> </x-tab><x-tab>
</x-tab>Thanks, Cheers .
. . . . . . . Spring Harrison<br><br>
<br><br>
<br>
At 14-05-2015 08:23 Thursday, Brad Neuhauser wrote:<br>
<blockquote type=cite class=cite cite="">Fyi, user GautamPratik already
started entering some hydro sites using the tag hydropower_project:name.
Here's a search for that:
<a href="http://overpass-turbo.eu/s/9lJ">
http://overpass-turbo.eu/s/9lJ</a> <br><br>
And one for power=generator generally in Nepal:
<a href="http://overpass-turbo.eu/s/9lN">
http://overpass-turbo.eu/s/9lN</a><br><br>
Cheers, Brad<br><br>
On Thu, May 14, 2015 at 9:03 AM, Steve Bower
<<a href="mailto:sbower@gmavt.net">sbower@gmavt.net</a>>
wrote:<br>
<dl>
<dd>The Nepal Electric Authority would likely already have such a map, or
relevant data:<br>
<dd><a href="http://www.nea.org.np/">http://www.nea.org.np/</a><br><br>
<dd>Page 106 of their annual plan has a transmission line map:<br>
<dd>
<a href="http://www.nea.org.np/images/supportive_docs/Annual%20Report-2014.pdf">
http://www.nea.org.np/images/supportive_docs/Annual%20Report-2014.pdf</a>
<br><br>
<dd>I did not find anything better in a quick search of their web site,
but they could probably provide something.<br>
<font color="#888888"><br>
<dd>Steve<br><br>
</font><br>
<dd>On Thu, May 14, 2015 at 7:26 AM, Jean-Guilhem Cailton
<<a href="mailto:jgc@arkemie.com">jgc@arkemie.com</a>> wrote:<br>
<dl>
<dd>Hi,<br><br>
<dd>As you may know, helicopters play a critical role in bringing help
to<br>
<dd>Nepalese people affected by April 25 7.8 earthquake, and May 12
7.4<br>
<dd>aftershock, with roads blocked or made dangerous by landslides
and<br>
<dd>unstable terrain.<br><br>
<dd>A USMC helicopter that was taking part in this effort is missing
since<br>
<dd>May 12. Other helicopters involved in the search and rescue
mission<br>
<dd>report that: "A primary concern for ongoing search and rescue
efforts is<br>
<dd>unmarked high tension power lines, which have been reported and
bisect<br>
<dd>many of the valleys in the search area".<br><br>
<dd>Some high tension power lines have already been mapped<br>
<dd>(<a href="http://overpass-turbo.eu/s/9lx">
http://overpass-turbo.eu/s/9lx</a> , passed along to those conducting
the<br>
<dd>searches). Starting from electrical dams makes it easier to spot
them.<br><br>
<dd>If mappers experienced at mapping power lines could give a hand,
this<br>
<dd>would be great. (Or others willing to learn, like me :) ).<br><br>
<dd>Bing is available for large parts of Nepal. A focus for current
search<br>
<dd>and rescue effort is around Ghorthali (27.7517 NĀ 86.0342 E) from
where<br>
<dd>a Nepalese local reported seeing a helicopter crash. But of course
high<br>
<dd>tension power lines would also be nice to have for
Sindhupalchowk,<br>
<dd>Dolakha and other affected districts (see<br>
<dd><a href="http://kathmandulivinglabs.github.io/quake-maps/">
http://kathmandulivinglabs.github.io/quake-maps/</a>).<br><br>
<dd>(Please download and upload OSM data often, in case other mappers
work<br>
<dd>on the same theme).<br><br>
<dd>Thanks,<br><br>
<dd>Jean-Guilhem<br><br>
<br>
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