Disc Golf Course Review Most Isolated Course
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#31
07-13-2013, 06:25 PM
 c_a_miller Birdie Member Join Date: May 2012 Location: Houston Years Playing: 5.6 Courses Played: 213 Throwing Style: RHBH Posts: 307 Niced 1 Time in 1 Post

Quote:
 Originally Posted by Steve West Simply computed all 22,302,006 distances from each course to every other course (using the haversine formula a = sin²(Δφ/2) + cos(φ1).cos(φ2).sin²(Δλ/2): c = 2.atan2(√a, √(1−a)): d = R.c: where φ is latitude, λ is longitude, R is earth’s radius) choosing the minimum distance to any other course for each course then sorting by country/state and distance. Why? Isn't that how you would do it?
I guess a better question would be how did you get all the latitudes and longitudes into a data base? Because you obviously did not manually click on each page to pull them out.
#32
07-13-2013, 06:53 PM
 Craig639 Par Member Join Date: Apr 2010 Location: Twin Cities Years Playing: 18.6 Courses Played: 254 Throwing Style: RHBH Posts: 208 Niced 2 Times in 2 Posts

Quote:
 Originally Posted by Steve West Simply computed all 22,302,006 distances from each course to every other course (using the haversine formula a = sin²(Δφ/2) + cos(φ1).cos(φ2).sin²(Δλ/2): c = 2.atan2(√a, √(1−a)): d = R.c: where φ is latitude, λ is longitude, R is earth’s radius) choosing the minimum distance to any other course for each course then sorting by country/state and distance. Why? Isn't that how you would do it?
Highfive!!
#33
07-13-2013, 07:11 PM
 BogeyNoMore * Ace Member * Join Date: Jul 2009 Location: Walled Lake, MI Years Playing: 13.5 Courses Played: 249 Throwing Style: RHBH Posts: 8,365 Niced 514 Times in 313 Posts

Quote:
 Originally Posted by Steve West Simply computed all 22,302,006 distances from each course to every other course (using the haversine formula a = sin²(Δφ/2) + cos(φ1).cos(φ2).sin²(Δλ/2): c = 2.atan2(√a, √(1−a)): d = R.c: where φ is latitude, λ is longitude, R is earth’s radius) choosing the minimum distance to any other course for each course then sorting by country/state and distance. Why? Isn't that how you would do it?
superlulz!

FYI :
University of MT - Northern (48.542175,-109.685130) and Warden Park (47.491935,-111.302720) are 113 miles apart (driving distance) according to Google maps. Looks like a fairly straight shot down US 87, probably not much closer "as a bird flies."

Has anyone actually verified a more remote course than UM Northern?

That one on the Tex-Mex border looks pretty lonely...
#34
07-13-2013, 07:26 PM
 lion * Ace Member * Join Date: Sep 2009 Location: SOCAL Years Playing: 15.1 Courses Played: 811 Throwing Style: RHBH Posts: 2,394 Niced 18 Times in 10 Posts

I don't agree with the one in Arizona because there is a listed practice course a few mikes away. The one in California is also not the furthest. I have a course I need to listed near that one. Also have another in mind for Cali. I have played all the courses in Nevada and Arizona. Nevada was pretty tough to play, also Arizona's most northern course is really tough to get to.
#35
07-13-2013, 07:27 PM
 BogeyNoMore * Ace Member * Join Date: Jul 2009 Location: Walled Lake, MI Years Playing: 13.5 Courses Played: 249 Throwing Style: RHBH Posts: 8,365 Niced 514 Times in 313 Posts

Steve's data says Buena Vista Park in Del Rio, TX (29.398459,-100.920450) is 102 miles removed, but I don't know from what.

Closest course I found to Buena Vista was Bandera DGC in Bandera TX (29.714900,-99.080100)... a 145 mile drive per Google maps. That's got MT beat.
#36
07-13-2013, 07:52 PM
 BogeyNoMore * Ace Member * Join Date: Jul 2009 Location: Walled Lake, MI Years Playing: 13.5 Courses Played: 249 Throwing Style: RHBH Posts: 8,365 Niced 514 Times in 313 Posts

Steve, are the distances you posted (i.e. 102 miles for Buena Vista in TX) straight line distances? That could definitely explain the difference. And what is it 102 miles from?

I plugged the two sets of coordinates into this GPS Latitude and Longitude Distance Calculator, and it spit out ≃113 miles
#37
07-13-2013, 08:19 PM
 Steve West * Ace Member * Join Date: Dec 2009 Years Playing: 43.5 Courses Played: 293 Posts: 3,414 Niced 463 Times in 256 Posts

Quote:
 Originally Posted by lion I don't agree with the one in Arizona because there is a listed practice course a few mikes away....
It's not surprising that a new course was built (or listed) somewhere in the previously-empty 33,979 square miles around that course in the last year and a half.

I'd bet a lot of these courses have a new nearest neighbor. So, there's still fun to be had by all.

[QUOTE=BogeyNoMore;2080736]Steve, are the distances you posted (i.e. 102 miles for Buena Vista in TX) straight line distances? That could definitely explain the difference.

Great circle route, or shortest possible distance. There are no straight lines on the Earth's surface.

Quote:
 Originally Posted by BogeyNoMore And what is it 102 miles from?
Don't know. Didn't save that. Your guess is as good as mine.

Quote:
 Originally Posted by BogeyNoMore I plugged the two sets of coordinates into this GPS Latitude and Longitude Distance Calculator, and it spit out ≃113 miles
I don't know what's going on with that calculator.
#38
07-13-2013, 08:39 PM
 BogeyNoMore * Ace Member * Join Date: Jul 2009 Location: Walled Lake, MI Years Playing: 13.5 Courses Played: 249 Throwing Style: RHBH Posts: 8,365 Niced 514 Times in 313 Posts

Touché sir. While I do realize there are no straight lines on the surface of "not quite a sphere because it's flatter at the poles, but probably close enough to approximate one for our purposes," I was just trying to determine how much difference there was between the shortest distance and driving distance (which for all intents and purposes is more practical since most of us can't take a helicopter from course to course). So if you wanted to bag Buena Vista and another course, you have to drive at least 145 miles, because 102 wouldn't get you to another course. IMO, Buena Vista's more remote than UM Northern, because you have to drive 32 miles farther to get to the closest course. I'm just looking at the question from a practical standpoint.

As for the 113 miles I just googled "calculate distance between coordinates" or something to that effect, and it was one of several links provided. Plugged in the coords and it came back with 112.67xxxxx. I make no claim as to it's accuracy or lack thereof.

Last edited by BogeyNoMore; 07-13-2013 at 08:42 PM.
#39
07-13-2013, 10:38 PM
 DavidSauls * Ace Member * Join Date: Mar 2008 Location: Newberry, SC Years Playing: 22.4 Courses Played: 124 Posts: 12,916 Niced 683 Times in 366 Posts

Funny, it always seemed to me that the most isolated course was any course for which a general workday has been announced. Suddenly, no one can get to it.

#40
07-13-2013, 11:44 PM
 tomdizzlefizzle Birdie Member Join Date: Nov 2009 Years Playing: 14.5 Courses Played: 142 Throwing Style: RHBH Posts: 494 Niced 0 Times in 0 Posts

The course in Antarctica is pretty isolated

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