[Talk-us] A new tracing layer for TIGER 2013

Mon Dec 9 00:26:10 UTC 2013

Thanks for the feedback!

There are only a few colors involved: streets are yellow and railroads are
blue, and both are a little brighter if they have changed since the 2006
data. Service roads are drawn a little thinner than the rest, following the
example of the 2012 TIGER layer.

I actually already have the name expansion ready (thanks to Paul Norman and
Toby Murray) and just need to generate and upload the new tiles.

The code for this one is part of
https://github.com/ericfischer/tiger-deltaand in particular
https://github.com/ericfischer/tiger-delta/blob/master/get-county-delta2

In the screenshot you posted, my intent was not to say that the OSM streets
shown were outdated, but instead to show that the good parts of the TIGER
data are already in OSM. At zoom level 16 and beyond, like the TIGER 2012
layer, this layer shows all the streets in TIGER, whether or not they are
also mapped in OSM. It's only if you zoom out to
http://www.openstreetmap.org/edit#map=15/47.8945/-122.2455 or lower that
streets that are already in OSM will be masked out from those in TIGER.

Would you find it useful to have TIGER-minus-OSM available even when zoomed
all the way in? I thought since all the OSM streets are already visible in
the editor's own display that it would be distracting to draw them twice.
But I am biased because iD shows the live street data at z16+ and doesn't
at zooms <16, and maybe the transition looks weird in JOSM.

Eric

On Sun, Dec 8, 2013 at 6:32 PM, Clifford Snow <clifford at snowandsnow.us>wrote:

> Eric,
> One other issue. Here is a link,
> https://www.dropbox.com/s/v1je9m490c0yns4/Why%20Flagged.png, to an area,
> http://osm.org/go/WJIDU~lZs-- near me. You can ignore the crazy tiger
> data on the right! However, notice the streets, 114th St SW, 115th St SW,
> 8th Pl W and 8 Ave W. There all all existing, but were flagged as being
> outdated. Is it because they are not exactly the same as the tiger data?
>
> BTW, I really appreciate the work you are putting into helping us fix
> streets along with Martijn's Battlegrid.
>
> Clifford
>
>
> On Sun, Dec 8, 2013 at 11:04 AM, Clifford Snow <clifford at snowandsnow.us>wrote:
>
>> Eric,
>> A big help would be to have an understanding of how ways are displayed on
>> the overlay. I see different shapes and colors. What do they represent?
>>
>> I can help with the name expansion. I have a fair number of abbreviations
>> that I've used in Washington State.
>>
>> BTW is your code at https://github.com/ericfischer/osm-tiger-update?
>>
>> Clifford
>>
>>
>> On Sun, Dec 8, 2013 at 10:42 AM, Eric Fischer <enf at pobox.com> wrote:
>>
>>>  As was just announced on the MapBox blog (
>>> https://www.mapbox.com/blog/openstreetmap-tiger/) there is a new
>>> OpenStreetMap tracing layer for 2013 Census Bureau TIGER map data in the US.
>>>
>>> The main reason for it, aside from incorporating this year's TIGER
>>> changes, is to provide different features at different zoom levels:
>>>
>>> * At zoom 16 and up, like the TIGER 2012 layer, it shows all the current
>>> TIGER roads so that they can be compared with OpenStreetMap and the
>>> discrepancies corrected.
>>>
>>> * At zoom 12-15, it shows only the TIGER roads that have been changed
>>> since the import in 2006, with the current state of OpenStreetMap masked
>>> out, so you see only the places where TIGER has been changed (and
>>> presumably corrected) but OpenStreetMap hasn't. This should give an easier
>>> overview of what places need attention.
>>>
>>> * At zooms below 12, like the Battle Grid, it also shows discrepancies
>>> between OSM and TIGER, but simplified because the individual streets are
>>> too small to draw in detail. It's a static calculation that will get
>>> periodically refreshed, but not instantly, as OpenStreetMap changes.
>>>
>>> The tile URL is http://{switch:a,b,c}.
>>> tiles.mapbox.com/v3/enf.ho204tap,enf.ho20a3n1,enf.game1617/{zoom}/{x}/{y}.png<http://tiles.mapbox.com/v3/enf.ho204tap,enf.ho20a3n1,enf.game1617/%7Bzoom%7D/%7Bx%7D/%7By%7D.png>but as the comma-separated list in the URL suggests, it is actually a
>>> composite of three layers that work together:
>>>
>>> TIGER streets/changes:
>>> https://a.tiles.mapbox.com/v3/enf.ho204tap/page.html?secure=1#14/40.3648/-86.8654
>>> OpenStreetMap mask:
>>> https://a.tiles.mapbox.com/v3/enf.ho20a3n1/page.html?secure=1#14/40.3648/-86.8654
>>> Low zooms:
>>> https://a.tiles.mapbox.com/v3/enf.game1617/page.html?secure=1#11/40.3648/-86.8654
>>>
>>> In the pull request for iD (https://github.com/systemed/iD/pull/2010)
>>> Ian Dees pointed out that the abbreviations in street names should expanded
>>> and that it would be good to also include house numbers. I'll be updating
>>> the vector data with expanded names in the next few days and will add the
>>> house numbers as soon as I can. Please let me know if you see anything else
>>> that ought to be better.
>>>
>>> Eric
>>>
>>> _______________________________________________
>>> Talk-us mailing list
>>> Talk-us at openstreetmap.org
>>> https://lists.openstreetmap.org/listinfo/talk-us
>>>
>>>
>>
>>
>> --
>> Clifford
>>
>> OpenStreetMap: Maps with a human touch
>>
>
>
>
> --
> Clifford
>
> OpenStreetMap: Maps with a human touch
>
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