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2024-04-14 - Added Chattahoochee Bend results
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2024-03-31 - Added Lake Brantley results
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2024-03-24 - Added Red Top results
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2024-03-17 - Added Joe Kurz results
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2024-03-10 - Added Don Carter results
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2024-03-03 - Added FDR State Park results
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2024-02-11 - Added Sweetwater results
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2024-02-04 - Added Bert Adams results
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2023-12-06 - Added Don Carter results.
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2023-12-03 - Added Sweetwater results
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2023-10-24 - Added Moores Bridge results
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2023-10-15 - Added FDR results
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2023-10-08 - Added Don Carter results
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2023-09-19 - Added Sweetwater results
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2023-09-10 - Added Lake Rutledge Beach results
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2023-05-28 - Added Oconee State Park and McIntosh AGM results
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2023-04-30 - Added Lake Rutledge and Moore's Bridge results
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2023-04-16 - Added Sweetwater and Cattahoochee Bend results
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2023-03-19 - Added Don Carter results
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2023-03-11 - Added Red Top and Joe Kurtz results
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2023-02-26 - Added FDR State Park results
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2023-02-19 - Added Sweetwater West results
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2023-02-05 - Added Don Carter results
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2023-01-01 - Added Chattahooche Bend results
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2022-12-04 - Added McIntosh Reserve results
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2022-11-21 - Added Dauset Trails results
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2022-11-13 - Added Sweetwater East results
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2022-10-23 - Added Mistletoe State Park results
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2022-10-09 - Added Don Carter results
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2022-09-25 - Added Sweetwater State Park results
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2022-09-17 - Added Hard Labor Creek results
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2022-09-08 - Added Red Top Mountain results
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2022-06-04 - Added McIntosh Reserve results
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2022-05-08 - Added Tugaloo State Park results
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2022-05-01 - Added FDR results
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2022-04-18 - Added Dauset Trails results
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2022-04-03 - Added Chattahoochee Bend and Sweetwater State Park results
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2022-03-19 - Added Hard Labor Creak results.
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2022-03-12 - Added Joe Kurz results
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2022-03-06 - Added Red Top Mountain Saturday results.
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2022-02-27 - Added FDR results.
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2022-02-20 - Added Bert Adams results
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2022-02-13 - Added Sweetwater results
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2022-02-05 - Added Mistletoe results
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2021-12-20 - Added McIntosh Reserve and Sweetwater State Park results
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2021-12-12 - Added Don Carter results.
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2021-12-04 - Added Redtop State Park results.
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2021-11-26 - Added Chattahoochee Bend results.
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2021-11-10 - Added Fort Yargo results.
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2021-10-31 - Added Sweetwater results
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2021-10-14 - Added Pflueger Trails results.
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2021-10-03 - Added Don Carter results.
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2021-09-19 - Added Dauset Trails results.
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2021-09-07 - Added Red Top State Park results
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2021-05-24 - Added Tugaloo and McIntosh Reserve results.
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2021-05-03 - Added Chattahoochee Bend, Moore's Bridge and Sweetwater Creek results
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2021-04-04 - Added Hard Labor Creek results.
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2021-03-15 - Added Red Top State Park results
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2021-03-09 - Added Joe Kurtz results.
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2021-02-22 - Added West Palisades results.
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2021-02-21 - Added Bert Adams results
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2021-02-07 - Added Lake Brantley results.
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2021-01-03 - Added McIntosh Reserve (12/20) results.
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2020-12-12 - Added Red Top (11/29) and Hard Labor Creek(12/6) results.
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2020-11-24 - Added Fort Yargo(11/1), FDR(11/15) and Chattahooche Bend(11/22) results.
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2020-10-25 - Added Dauset Trails results.
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2020-10-07 - Added Hard Labor Creek State Park (9/27) and FDR Start Park(10/4) results.
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2020-09-27 - Added results for the Red Top Mountain meet. If a runner ran multiple courses over the course of the weekend, only their first race is included.
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2020-09-19 - Added results for the Sweetwater meet. If a runner ran multiple courses, only their first race was included.
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2020-09-07 - Added Dauset Trails results, updated rankings.
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2020-03-08 - Added results from the Red Top 2 Day meet.
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2020-02-27 - Added Palisades West (2/16) and Hard Labor Creek State Park (2/23) results to the rankings.
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2020-02-23 - Added Don Carter (2/1) and Bert Adams(2/9) results to the rankings.
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2019-12-14 - Added Mistletoe State Park results. The next ranking event will be after the Georgia O-Fest.
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2019-11-24 - Added Sweetwater (11/17) results. Ranking have been updated, virtual badges awarded
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2019-11-10 - Lake Brantley splits have been added, badges awarded and rankings updated.
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2019-11-04 - Red Top splits have been added, badges awarded and rankings updated.
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2019-10-21 - Dauset Trails splits have been added, badges awarded and rankings updated.
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2019-10-14 - Richard Booth was awarded our first "Pathfinder" badge for the 2019/2020 season. Splits for the Chattahoochee Bend meet have been calculated, medals award, and rankings updated.
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2019-10-09 - Hard Labor Creek splits have been added, ranking have been updated and badges awarded.
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2019-09-30 - Wow, 239 starts for the Red Top meet. Splits have calculated, rankings updated and badges awarded.
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2019-09-24 - Added results for Don Carter. Rankings have been updated, badges have been awarded.
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2019-09-22 - Added results for McIntosh Reserve. Updated rankings.
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2019-05-22 - Playing catch up. Added results for West Palisades and Chattahoochee Bend.
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2019-05-05 - Added splits for Tugaloo. Rankings and badges have been updated.
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2019-03-27 - Added results for Sweetwater. Rankings and badges have been updated
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2019-03-18 - Added results for Joe Kurz and Moore's Bridge. Rankings and badges have been updated.
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2019-03-09 - Added splits for the Mistletoe results. GAOC rankings have been updated. Virtual badges have been awarded. Please note that we do not include 'Blue' course results at this time.
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2019-03-02 - Added splits for the Red Top 2 day meet. GAOC ranking and badges have been updated
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2019-02-17 - Added splits for Bert Adams (2/10/2019). GAOC rankings have been updated, vertual badges awarded.
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2019-02-03 - Added splits for Don Carter. GAOC rankings have been updated. Vertual badges have been awarded.
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2018-12-18 - Added splits for Moore's Bridge. Virtual badges have been awarded. GAOC rankings have been updated.
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2018-12-09 - Added splits for the Red Top State Park meet. Virtual badges have been awarded. GAOC rankings have been updated.
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2018-12-03 - Added Splits for Island Ford. Virtual badges have been awarded. GAOC rankings have been updated.
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2018-11-19 - Added splits for FDR State Park. Virtual badges and medals have been awarded. The GAOC Rankings have been updated.
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2018-11-11 - Added splits for Hard Labor Creek. Virtual badges and medals have been awarded. The rankings have been updated.
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2018-11-04 - Added the Gold Branch results. The Gold Branch meet had a number of runners run the same course twice. In those cases, we only included their first run. Rankings have been updated, virtual badges and medals have been awarded.
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2018-10-17 - Added splits for Hard Labor Creek. Virtual badges and medals awarded and rankings have been updated.
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2018-10-01 - Added splits for Dauset Trails. Rankings have been updated, badges and medals have been awarded.
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2018-09-23 - Added splits for Fort Yargo, updated ranking and awarded badges.
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2018-09-22 - We had some data issues with the Sweetwater meet. After cleaning up the file, we reimported and reran the ranking calculation.
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2018-09-19 - Added splits for Sweetwater, updated rankings and badges
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2018-09-12 - Added splits for Don Carter, updated rankings and badges.
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2018-04-15 - Added splits for Chattahoochee Bend. Updated rankings and badges.
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2018-03-21 - Added splits for Red Top days 1 and 2. Updated rankings and badges.
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2018-03-13 - Added splits for Dauset Trails. Rankings and badges have been updated
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2018-03-05 - Added splits for Joe Kurz WMA. Rankings and badges have been updated.
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2018-03-03 - Added splits for West Palisades. Rankings and badges have been updated.
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2018-02-19 - Added splits for Bert Adams. Rankings and badges have been updated.
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2018-02-10 - Added splits for Island Ford. Rankings and badges have been updated.
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2018-02-07 - Added splits for Gold Branch. Rankings and badges have been updated.
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2018-01-28 - Added splits for Don Carter. Rankings and badges have been update.
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2017-12-11 - Gold Branch splits have been added, rankings recalculated and virtual medals awarded.
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2017-11-20 - FDR splits have been added, rankings recalculated and virtual medals awarded.
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2017-11-19 - Badges and Virtual Medals!
We have added badges and virtual medals to the runner's profile page. The runner’s profile can be found by clicking on the calculation run (top date on the right column). In the ranking listing, click on the runner to see the runner’s profile page.
Virtual medals
Virtual medals are awarded for 1st - 3rd for each course. The virtual medals are gender neutral (at least for now).
Badges
We have added two types of badges. The first is performance based, the second is activity based:
Performance badges
There are three levels of performance badges: Expert; Navigator; Pathfinder. To earn the badge, the runner would have to have at least two races on advanced courses (Red, Green, Brown) that exceed the performance standards:
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Expert (expert badge shown above)
- 10 min per k - Males
- 11:15 min per k - Females
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Navigator
- 12 min per k - Males
- 13:30 min per k - Females
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Pathfinder
- 15 min per k - Males
- 17 min per k - Females
Activity Badges
An activity badge will be awarded based on the number of courses run. Badges are by class. A runner would need at least two races in the same class. Badges are awarded at 2+, 5+, 10+, 15+.
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2017-11-05 - Added splits for Sope Creek. Updated club rankings.
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2017-10-23 - Added splits for Chattahoochee Bend State Park. Updated club rankings.
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2017-07-29 - Added Split Analysis
Added split analysis calculation and reporting to the ranking system.
The calculations are experimental and subject to change.
Split Caclulation:
- Create baseline (Batman)
- For each split, calculation batman’s time as the harmonic mean of the runners split times.
- Calculate runner’s speed
- For each split, calculate the runner’s performance as a ratio of batman’s split (batman’s time / runner’s time)
- Get the harmonic mean for each of the runners scores
- Remove outliers - any score 20% below their initial harmonic mean
- Recalculate runners speed with the remaining scores
- Calculate time lost
- Calculates runners expected time ( batman’s split / speed)
- If the runners actual time is more that 10% slower that the expected time. The delta is considered time lost.
Note: All reporting of time on the calculations is in whole minutes.
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2017-06-24 - Welcome to version 2.0 of the GAOC Ranking System
Version two is a complete rewrite. Previously, we had a calculation module written in Java and a Ruby on Rails system to display the results. It is now one system. Major changes in the new ranking system:
- Adding results files can be done from anywhere with an internet connection.
- Updates to the calculations:
- Runners initial values were previously set at 50. They are now based on their first race score.
- If a runner runs Yellow and an advanced course, their Yellow result is moved into a sprint result.
- Can now import both OE (OE0014) and OR files without modification.
- News can be remotely added and published.
- Some news is auto generated.
- Data store moved to SQLite from MySQL
- Added the ability to filter rankings by club or school.
- Added a ‘Pace’ tracking chart to the runner’s detail page.
High School Power Rankings
A school’s “Power” ranking is the combined score of the school’s top 5 runners in each category: Varsity, Junior Varsity, Intermediate
High School ranking scores are normalized by course and gender. The average of the top 10% (minimum of 2) of the runners is set to 100. The runners scores are then normalized to the calculated 100 score.
Varsity
A school's top 5 ranking scores on Red, Green or Brown. If a runner has ranking scores on multiple courses, only their highest score is included.
Junior Varsity
A school's top 5 ranking scores on Orange. A runner cannot be included in Junior Varsity if they are included in the Varsity rankings.
Intermediate
A school’s top 5 ranking scores on Yellow. A runner cannot be included in Intermediate if they are included in the Varsity or Junior Varsity rankings.
Ranking Methodology
The ranking methodology is derived from Orienteering USA’s methodology. Daily Ranking points earned by competition are calculated as follows: The Course Difficulty is calculated from the average of the Personal Course Difficulty of each competitor, which is the competitor’s ranking points for that race multiplied by their time in minutes.
- This calculation is circular, so the Iteration Method is used to determine each competitor’s ranking points.
- Competitors initial start points are based on the relative performace of their first race in the calculation period.
- The calculations are repeatedly performed until the results converge.
- The average Personal Course Difficulty is a harmonic mean, which is the reciprocal of the arithmetic mean of the reciprocals. This causes the results in (a) to converge and results in non-drifting (i.e., significant) results.
- Daily Ranking scores of zero are excluded from this iterative calculation process.
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