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View Full Version : Freezing Saddles Got A County Board Shout Out!



Tim Kelley
01-31-2014, 08:29 AM
This past Tuesday, County Board Chair Jay Fisette gave a shoutout to Freezing Saddles during a County Board Recessed Meeting:

http://arlington.granicus.com/MediaPlayer.php?view_id=2&clip_id=2716

The relevant section starts around 33:50.

Good job everyone!!

peterw_diy
01-31-2014, 09:06 AM
Cool. Nerdy question -- iirc the board member said this forum was sponsored by waba & Arl but the logos suggest Arl, Alex, and ddot. Who in fact sponsors this forum?

dasgeh
01-31-2014, 09:08 AM
Awesome. If only he'd connect that to clearing the trails...

rcannon100
01-31-2014, 09:09 AM
I could answer it this way: Tim Kelley (Bike Arlington) is single-handedly responsible for more wasted work hours in Washington D.C. than just about anyone else

(Tim Kelley is our admin extraordinaire)

http://i1209.photobucket.com/albums/cc399/vng2327/diamond%20derby%202013/20130928_170715_zpsec2bf7f2.jpg

Tim Kelley
01-31-2014, 09:12 AM
Cool. Nerdy question -- iirc the board member said this forum was sponsored by waba & Arl but the logos suggest Arl, Alex, and ddot. Who in fact sponsors this forum?

The organizations who have their logos on the page are the official sponsors.

Tim Kelley
01-31-2014, 09:14 AM
I could answer it this way: Tim Kelly (Bike Arlington) is single-handedly responsible for more wasted work hours in Washington D.C. than just about anyone else

(Tim Kelly is our admin extraordinaire)

:-)

Bob, I'm going to start spelling your last name with only two "N's" until you start putting in the second "E" in my last name.

dasgeh
01-31-2014, 09:17 AM
Long shot but... any chance there's a way to pull how many of the FS miles are in Arlington County?

dbb
01-31-2014, 09:20 AM
:-)

Bob, I'm going to start spelling your last name with only two "N's" until you start putting in the second "E" in my last name.

I recommend you use the superhuman powers of the admin to provide a reminder on Bob's forum status

peterw_diy
01-31-2014, 09:22 AM
Long shot but... any chance there's a way to pull how many of the FS miles are in Arlington County?

If I had to guess, I expect hozn will see that as a fun challenge. Hozn, if you can get a polygon for arl's shape I can give you pointers for point-in-poly algorithms. Sorry I haven't tested any line-in-poly algorithms, you might want to break down & use a real GIS suite for that...

rcannon100
01-31-2014, 09:22 AM
He complains about my inability to spell..... but not that picture :confused:

dkel
01-31-2014, 09:24 AM
:-)

Bob, I'm going to start spelling your last name with only two "N's" until you start putting in the second "E" in my last name.

Kelleys of the world, unite!

Tim Kelley
01-31-2014, 09:34 AM
He complains about my inability to spell..... but not that picture :confused:

Dem quads.

jrenaut
01-31-2014, 09:34 AM
Hozn has done much more mucking around with the Strava data than I have, so he may know of a way, but I think to figure out how many miles were in Arlington would be really, really difficult. It's possible, but unless the forum has an intern with a CS degree who can work on it for the next month or two, it's not likely to happen.

hozn
01-31-2014, 10:47 AM
Hozn has done much more mucking around with the Strava data than I have, so he may know of a way, but I think to figure out how many miles were in Arlington would be really, really difficult. It's possible, but unless the forum has an intern with a CS degree who can work on it for the next month or two, it's not likely to happen.

Yes, there are a few challenges here. It would be a fun project, but I don't have the time to do it. We do have ability to fetch the GPS stream (though we do not currently). We'd then need get a geospatial polygon of the county and find the intersection with all the GPS streams. Probably the naive way I'd do it, without giving it much thought, is "play back" each stream and for every point check to see if it is in the county if it is then add the current distance to some counter; once the activity leaves the counting stop adding to counter; if they re-enter then start adding again. I am sure there is a more elegant way to do this with geospatial intersections; I'd have to learn more about that.

Update: Looks like these boundary databases might works as the basis for the shapefile/polygon construction: http://cta.ornl.gov/transnet/Boundaries.html

Steve O
02-02-2014, 01:29 PM
Long shot but... any chance there's a way to pull how many of the FS miles are in Arlington County?

An easier way--since the Arlingtonians are the coolest--would be to just appropriate all the miles for ourselves. No calculations necessary.

peterw_diy
02-02-2014, 06:17 PM
Yeah, I'd go with the naive approach, too, especially if the segments are as short as I expect. It wouldn't be correct but should be close enough. Use something like an associative array of MD5 hashes to cache each activity's Arl distance. It'd be fun to extend slightly by computing the distance in a number of local jurisdictions. And tally stuff like miles ridden beginning or ending in Arlington.

Ooh, imagine if you had polygons describing common MUPs, cycletracks, etc...

dkel
02-02-2014, 06:31 PM
Ooh, imagine if you had polygons describing common MUPs, cycletracks, etc...

Mmm...polygons...

mstone
02-03-2014, 07:32 AM
Give the right database app, there are simple gis operators for things like "within boundary"

dasgeh
02-03-2014, 09:28 AM
On a more macro level (as in not just our competition), is Strava interested in using its data for good, and by "good" I mean "advocacy"? If so, I could give them a list that would help with Arlington...

Tim Kelley
02-03-2014, 09:35 AM
On a more macro level (as in not just our competition), is Strava interested in using its data for good, and by "good" I mean "advocacy"? If so, I could give them a list that would help with Arlington...

What kind of list are you talking about?

We've been in discussion with folks at Strava to be one of their pioneering jurisdictions that uses their data for analysis and planning. We should have an official agreement in place very soon.

dasgeh
02-03-2014, 10:42 AM
What kind of list are you talking about?

We've been in discussion with folks at Strava to be one of their pioneering jurisdictions that uses their data for analysis and planning. We should have an official agreement in place very soon.

To start with, numbers of what people do when the trails are icy -- are they still taking trails? (are they falling?) are they taking streets instead? Are they not biking? Biking to metro? You could start basic with a heatmap on a non-icy day and a heatmap on an icy day.

And moving on to planning, it would be interesting to see heatmap-like routes focused on certain destinations. Like when a ride ends in Ballston, how are people riding there? Clarendon? Westover? The Drafthouse area of the Pike? 23rd St in CC?

When new infrastructure is introduced, looking at behavior before and after. Did those bike boxes on Veitch help? Etc.

Obviously, using the data, we'd have to recognize its limitations: it's not going to capture all cyclists, and in particular, it's least likely to capture the most-transportation oriented among us, but it's a start.

Thanks! I think it would be really exciting if we could get them on board.

rcannon100
02-03-2014, 10:47 AM
It is not Strava's data; it is your data.


Strava does not claim ownership of Content you may submit or make available for inclusion on the Site. However, with respect to Content you submit or make available for inclusion on the Site (other than User Data or Payment Method information), you grant Strava a worldwide, perpetual, irrevocable, royalty-free and non-exclusive license, as applicable, to use, distribute, reproduce, modify, adapt, publicly perform and publicly display and otherwise exploit such Content on the Site for the purposes of providing and promoting the Site and the features and services available on the Site.

Tim Kelley
02-03-2014, 11:05 AM
To start with, numbers of what people do when the trails are icy -- are they still taking trails? (are they falling?) are they taking streets instead? Are they not biking? Biking to metro? You could start basic with a heatmap on a non-icy day and a heatmap on an icy day.

And moving on to planning, it would be interesting to see heatmap-like routes focused on certain destinations. Like when a ride ends in Ballston, how are people riding there? Clarendon? Westover? The Drafthouse area of the Pike? 23rd St in CC?

When new infrastructure is introduced, looking at behavior before and after. Did those bike boxes on Veitch help? Etc.

Obviously, using the data, we'd have to recognize its limitations: it's not going to capture all cyclists, and in particular, it's least likely to capture the most-transportation oriented among us, but it's a start.

Thanks! I think it would be really exciting if we could get them on board.


Ah, that's more clear what you are getting at. No, Strava will not be doing that level of analysis--they'll just be providing a big database with ride details.

dasgeh
02-03-2014, 11:15 AM
Ah, that's more clear what you are getting at. No, Strava will not be doing that level of analysis--they'll just be providing a big database with ride details.

So you will get the data? In which case, have I got a list for you! :-)

americancyclo
02-03-2014, 12:43 PM
So you will get the data? In which case, have I got a list for you! :-)

I always thought this would be a cool way to evaluate bike lanes and look for new places to add infrastructure based on demand, but I bet that it tends towards the more adventurous experienced cyclist rather than the new commuter.

dasgeh
02-03-2014, 12:56 PM
I always thought this would be a cool way to evaluate bike lanes and look for new places to add infrastructure based on demand, but I bet that it tends towards the more adventurous experienced cyclist rather than the new commuter.

Probably. But you could probably tell from the data.

peterw_diy
02-03-2014, 01:04 PM
Strava will not be doing that level of analysis--they'll just be providing a big database with ride details.

Hmm, sounds very cool, but also a potential privacy minefield.

rcannon100
02-03-2014, 01:24 PM
Hmm, sounds very cool, but also a potential privacy minefield.

Handling Freezing Saddles registration, I can tell you that there are a good number of participants already uncomfortable with the use of Strava. If the data gets data-mined and turned over to Arlco or anyone else, I think, um, the discomfort level will increase.

peterw_diy
02-03-2014, 02:54 PM
Handling Freezing Saddles registration, I can tell you that there are a good number of participants already uncomfortable with the use of Strava. If the data gets data-mined and turned over to Arlco or anyone else, I think, um, the discomfort level will increase.

Yep. Strava's privacy policy seems to allow them to hand lots of stuff to ArlCo as long as there's no "personal" info included. But I imagine it would be quite difficult to effectively anonymize this stuff given how much info strava.com already provides on athletes, even those with "enhanced privacy mode" selected. If Strava gives ArlCo data including travel within Strava "hidden locations", then they'll really be setting themselves up for trouble if the wrong folks get hold of the data. And I'd note that in some folks' minds, "the wrong folks" might even include Arl Co police.

At least Freezing Saddles is thoroughly opt-in.

It'd be a lot safer for ArlCo to use something like CycleTracks (http://www.sfcta.org/modeling-and-travel-forecasting/cycletracks-iphone-and-android) that's specifically designed & intended to provide cycling geodata to municipalities.