<div dir="ltr">Markus, take a look at the TIGER Battlegrid! It highlights areas where there have not been a lot of edits made to the original street data import.<div><br></div><div><a href="https://wiki.openstreetmap.org/wiki/TIGER_Battlegrid">https://wiki.openstreetmap.org/wiki/TIGER_Battlegrid</a><br></div><div><br></div><div>Another fun tool for finding things to fix is Improve OSM. </div><div><br></div><div><a href="http://improveosm.org/#background=Bing&map=2.00/0.0/0.0">http://improveosm.org/#background=Bing&map=2.00/0.0/0.0</a><br></div><div><br></div><div>Both of tools highlight areas of the highest priority, so you're focusing your energy where it matters most.</div><div><br></div><div>Best,</div><div><br></div><div>Elliott</div></div><br><div class="gmail_quote"><div dir="ltr">On Mon, Nov 14, 2016 at 1:06 AM Mark Wagner <<a href="mailto:mark%2Bosm@carnildo.com">mark+osm@carnildo.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On Sun, 13 Nov 2016 22:22:06 -0500<br class="gmail_msg">
Russ Nelson <<a href="mailto:nelson@crynwr.com" class="gmail_msg" target="_blank">nelson@crynwr.com</a>> wrote:<br class="gmail_msg">
<br class="gmail_msg">
> Markus Fischer writes:<br class="gmail_msg">
> > I am new to this and the area where I live is very well mapped<br class="gmail_msg">
> > (probably due to high density of tech workers). Where do I go to<br class="gmail_msg">
> > start mapping areas that are less well mapped (me aimlessly poking<br class="gmail_msg">
> > at this does not sound like a good approach)?<br class="gmail_msg">
><br class="gmail_msg">
> Oh, and you can always do some work in Pennsylvania. Here, let's pick<br class="gmail_msg">
> a place at random, Thompson,<br class="gmail_msg">
> <a href="https://www.openstreetmap.org/#map=12/41.8666/-75.5154" rel="noreferrer" class="gmail_msg" target="_blank">https://www.openstreetmap.org/#map=12/41.8666/-75.5154</a><br class="gmail_msg">
><br class="gmail_msg">
> Look at Willow Street against Bing aerial imagery. It's badly aligned.<br class="gmail_msg">
> Look at Main Street. Also badly aligned.<br class="gmail_msg">
> Look at the cemetery west of Main. It's not on the map.<br class="gmail_msg">
> Jefferson, East Jackson, Water, all badly aligned.<br class="gmail_msg">
> Four bodies of water north of the village, all missing.<br class="gmail_msg">
> A little creek coming in from the west and going into a mill pond.<br class="gmail_msg">
><br class="gmail_msg">
> There's LOTS to do, and you don't need to have ever gone to the<br class="gmail_msg">
> place. You can just see it from the air. You can even see where an<br class="gmail_msg">
> intersection has traffic lights -- the aerials are that good.<br class="gmail_msg">
<br class="gmail_msg">
I wouldn't recommend pure armchair mapping as a starting point for<br class="gmail_msg">
someone just getting in to OSM. There are too many "gotchas": to take<br class="gmail_msg">
your traffic light example, there are patterns of street lights that<br class="gmail_msg">
look similar to traffic lights if you're just judging from the shadows<br class="gmail_msg">
they cast. Or looking at Thompson, you missed the fact that Starrucca<br class="gmail_msg">
Creek proceeds to exit the millpond, flow west through Thompson, and<br class="gmail_msg">
loop around to the north and east, to join with the Susquehanna River<br class="gmail_msg">
about ten miles away. Or to take an example in my area, most of the<br class="gmail_msg">
small bodies of water are seasonal and turn into patches of<br class="gmail_msg">
dried mud in the late summer, something you'd never figure out from<br class="gmail_msg">
looking at Bing.<br class="gmail_msg">
<br class="gmail_msg">
I'd recommend starting by simply verifying things in your immediate<br class="gmail_msg">
area. It will give you a feel for how things on the ground match up to<br class="gmail_msg">
what you see from the air, and you'll probably find some businesses or<br class="gmail_msg">
roads that need updating.<br class="gmail_msg">
<br class="gmail_msg">
--<br class="gmail_msg">
Mark<br class="gmail_msg">
<br class="gmail_msg">
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</blockquote></div><div dir="ltr">-- <br></div><div data-smartmail="gmail_signature"><div dir="ltr">Elliott Plack<br><a href="http://elliottplack.me">http://elliottplack.me</a></div></div>