Extremes: Difference between revisions
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== General information == | == General information == | ||
This is an expression used by Profile stats module [[Finds_tab#Extremes_by_area|Extremes by area]] | This is an expression used by [[Profile stats]] module [[Finds_tab#Extremes_by_area|Extremes by area]] | ||
In simple terms "extremes" refers to attributes like most western, highest, most favorite points and so forth. | In simple terms "extremes" refers to attributes like most western, highest, most favorite points and so forth. | ||
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Which geocache is an extreme is determined by finding the current most extreme in its field. For example the most western one. Current meaning a none archived, but potentially disabled. Then that geocache, all geocaches that are on that coordinate, or further west, including archived, are counted as "most western". This means that there may be multiple geocaches counting as "the most western", both archived and none archived. | Which geocache is an extreme is determined by finding the current most extreme in its field. For example the most western one. Current meaning a none archived, but potentially disabled. Then that geocache, all geocaches that are on that coordinate, or further west, including archived, are counted as "most western". This means that there may be multiple geocaches counting as "the most western", both archived and none archived. | ||
Various event types are excluded since the events aren't meant to be "permanent". | |||
== Types == | == Types == | ||
Latest revision as of 15:13, 6 November 2025
General information
This is an expression used by Profile stats module Extremes by area
In simple terms "extremes" refers to attributes like most western, highest, most favorite points and so forth.
Some of the below are affected by the setting for Antipode caches.
Calculation
Which geocache is an extreme is determined by finding the current most extreme in its field. For example the most western one. Current meaning a none archived, but potentially disabled. Then that geocache, all geocaches that are on that coordinate, or further west, including archived, are counted as "most western". This means that there may be multiple geocaches counting as "the most western", both archived and none archived.
Various event types are excluded since the events aren't meant to be "permanent".
Types
Oldest
This is based on the hidden date fields, as opposed to the publish date field. There is also a hard-coded minimum month to minimize the risk of fabricated data.
Most northern
The geocache with the highest latitude number. Plotted coordinates is what counts, not any final solution. As always the country assigned to the geocache is also what counts, not where it's actually geographically located.
Most eastern
See most northern.
Most southern
See most northern.
Most western
See most northern.
Most central
The most central geocache in the area, based on geographical data (not demographical data). The central point of an area can be counted in several ways. With this fact in mind it is very likely that Project-GC's central point may not match what's commonly known. Project-GC has implemented what they believe is the most correct way to calculate it.
Project-GC uses its polygon data and then calculates a centroid using the GIS function ST_Centroid.
Various reasons why Project-GC's center might not match other definitions:
- Project-GC calculates a Centroid. Other methods might use the center of a bounding box for example.
- Project-GC uses the polygon data it has for the area. This data might not match the data used by others.
- Project-GC uses country definitions as Geocaching.com has them. In some cases it means that islands belonging to a country does not.
- Many commonly known centers are based on very old calculations, which are less precise than we can do with today's computers.
- Some commonly known centers has been calculated by compacting the areas by removing all sea water and "moving islands" onto mainland.
- Different handling of the fact that the Earth is a sphere, and not flat, and not perfectly round.
- Some have also used methods to divide the country into equal parts of lands (measured in area).
- Some methods include sea water, which Project-GC avoids.
External sources to better understand the issues:
Highest
The geocache with the highest elevation according to Project-GC's elevation data.
It's intentional that there isn't a "Lowest" type. The data isn't reliable enough.
Most finds
The geocache with the most number of Found it logs.
Most favorited
The geocache with the most Favorite points.
Example
