Editing 426: Geohashing
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The algorithm is built in a way that: | The algorithm is built in a way that: | ||
* Makes it impossible to plan a meeting in advance of more than a few days and usually not more than a day. | * Makes it impossible to plan a meeting in advance of more than a few days and usually not more than a day. | ||
β | ** This is due to incorporation of the Dow opening as seed - there isn't a new value of the seed | + | ** This is due to incorporation of the Dow opening as seed - there isn't a new value of the seed everyday since the Dow doesn't open on weekends or holidays, but there is for most days. The reason Saturday is mentioned in the title-text is that the coordinates for that day are generated using Friday's open, giving a greater number of hours to plan the 4 PM local time meetup (how many depends on the time zone(s) of the graticule, hence the '30W' rule). |
* Changes every day, due to the incorporation of the UTC date. | * Changes every day, due to the incorporation of the UTC date. | ||
* Has only a vanishingly small chance of generating a point in the same exact location twice via hash collision. Some of them have gotten closeish to each other, however. | * Has only a vanishingly small chance of generating a point in the same exact location twice via hash collision. Some of them have gotten closeish to each other, however. |