[Talk-us] More on TIGER: Where it's likely safe to import

Fri Jan 25 07:26:44 GMT 2013

Okay, so I didn't do the density thing yet, but I've made some other additions to the TIGER green map that I think are worth mentioning.

I squashed the greens and inverted the blacks so that the map is more legible, potentially easier to print, and less confusing in the difference between the no-editors and yes-editors areas. The URLs are all still the same and the map is here:
	http://www.openstreetmap.us/~migurski/green-means-go/

If you see any black tiles, clear your cache. The old version is now here:
	http://www.openstreetmap.us/~migurski/green-means-go-2013-01-03/

I'm starting to add SEO-friendly, single-geography views. I'm just getting started, using counties at first. Every county in the lower 48 will be accessible via a URL like one of these:
	http://www.openstreetmap.us/~migurski/green-means-go/Iowa/O'Brien-County.html
	http://www.openstreetmap.us/~migurski/green-means-go/California/Alameda-County.html
	http://www.openstreetmap.us/~migurski/green-means-go/Illinois/Cook-County.html
	http://www.openstreetmap.us/~migurski/green-means-go/California/San-Bernardino-County.html
	http://www.openstreetmap.us/~migurski/green-means-go/California/Riverside-County.html
	http://www.openstreetmap.us/~migurski/green-means-go/Arizona/Coconino-County.html
	http://www.openstreetmap.us/~migurski/green-means-go/Louisiana/East-Baton-Rouge-Parish.html
	http://www.openstreetmap.us/~migurski/green-means-go/New-York/New-York-County.html
	http://www.openstreetmap.us/~migurski/green-means-go/Virginia/Falls-Church-city.html

The county views are open to suggestions, and quite low on detail for the moment. What should go on there?

-mike.

On Jan 6, 2013, at 5:51 PM, Michal Migurski wrote:

> Thanks Steve!
> 
> I think that would be possible, yeah. I already use object density as one of the inputs here, and could use it to tweak the greens somewhat. The colors need a second pass.
> 
> -mike.
> 
> On Jan 4, 2013, at 3:00 PM, Steve Coast wrote:
> 
>> Mike
>> 
>> Nice.
>> 
>> Could you use relative object density per little square as a proxy for population density?
>> 
>> I ask because all the bright green areas near me are forests or old milk farms. I don’t care. I want to see high density areas and attack those as a priority since that’s where people are and where they go...
>> 
>> Steve
>> 
>> From: Michal Migurski <mike at teczno.com>
>> Sent: January 3, 2013 7:03 PM
>> To: OpenStreetMap US Talk <talk-us at openstreetmap.org>
>> Subject: Re: [Talk-us] More on TIGER: Where it's likely safe to import
>> 
>> On Dec 17, 2012, at 12:40 PM, Michal Migurski wrote:
>> 
>>> On Dec 16, 2012, at 8:32 PM, Martijn van Exel wrote:
>>> 
>>>> Have you looked into full history planet parsing to get a fuller
>>>> picture of editing history? I took a stab at full history user metrics
>>>> some time ago using osmjs;
>>>> https://github.com/mvexel/OSMQualityMetrics/blob/master/UserStats.js -
>>>> this produces one set of metrics for the entire .osh file you feed it
>>>> but it may prove useful for future work. I haven't touched this in a
>>>> while but it should still work :/
>>> 
>>> I have downloaded a copy and given it a beginning look. I'm new to parsing things of that magnitude; my first thought was to use the full history file for creations/modifications/deletions on nodes and add that to what I'm doing already for ways on the osm2pgsql tables. Does that sound reasonable?
>> 
>> Over the holiday break, I've been grinding through the full history file. I'll write more about the process and publish some raw data, but the short version is that I've replaced the Green Means Go tiles with new versions that incorporate edits to the underlying nodes, address some of the feedback I've received, and show a slightly different map of the US.
>> 
>> New map:
>>        http://www.openstreetmap.us/~migurski/green-means-go/
>> 
>> Old map:
>>        http://www.openstreetmap.us/~migurski/green-means-go-2012-12-16/
>> 
>> Charlotte Wolter and NE2 both pointed out that Florida should see a lot more post-import editing that I had originally shown, and in fact that's what the map now shows:
>>        http://www.openstreetmap.us/~migurski/green-means-go/#9/28.3213/-81.6257
>>        http://www.openstreetmap.us/~migurski/green-means-go-2012-12-16/#9/28.3213/-81.6257
>> 
>> Urban fringe areas also show more edits, making them less attractive targets for blind imports:
>>        http://www.openstreetmap.us/~migurski/green-means-go/#10/37.7707/-122.3451
>>        http://www.openstreetmap.us/~migurski/green-means-go-2012-12-16/#10/37.7707/-122.3451
>> 
>> I've also stripped away the US coastal territory based on NLCD water designation, per SteveC's suggestion.
>> 
>> These massive edits to counties in Pennsylvania are interesting to me:
>>        http://www.openstreetmap.us/~migurski/green-means-go/#8/40.918/-77.146
>> 
>> -mike.
>> 
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>> 
>> 
>> 
>> 
>> 
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