Freezing Saddles Got A County Board Shout Out!

[peterw_diy]

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]

Awesome. If only he’d connect that to clearing the trails…

[rcannon100]

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)

[Tim Kelley]

@peterw_diy 76162 wrote:

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]

@rcannon100 76165 wrote:

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]

Long shot but… any chance there’s a way to pull how many of the FS miles are in Arlington County?

[dbb]

@Tim Kelley 76167 wrote:

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]

@dasgeh 76169 wrote:

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]

He complains about my inability to spell….. but not that picture :confused:

[dkel]

@Tim Kelley 76167 wrote:

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]

@rcannon100 76173 wrote:

He complains about my inability to spell….. but not that picture :confused:

Dem quads.

[jrenaut]

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]

@jrenaut 76179 wrote:

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]

@dasgeh 76169 wrote:

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]

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…

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