http://wiki.xkcd.com/geohashing/Main_Page XKCD comic #426 contains an algorithm that generates random coordinates across the graticule every day. http://carabiner.peeron.com/xkcd/map/map.html?date=2025-05-19&lat=46&long=14&zoom=8&abs=-1 Latitude: 46.96076444923508 <br />Longitude: 14.88592330943491 46.96076444923508 14.88592330943491 Mon, May 19 2025 15:30:00 +0100 f5f4a8b09fc7910fe2cbdeb8c97a1dae http://carabiner.peeron.com/xkcd/map/map.html?date=2025-05-18&lat=46&long=14&zoom=8&abs=-1 Latitude: 46.89595913048336 <br />Longitude: 14.89209646369502 46.89595913048336 14.89209646369502 Sun, May 18 2025 15:30:00 +0100 e55d93dbfa877feee4606f10728769ed http://carabiner.peeron.com/xkcd/map/map.html?date=2025-05-17&lat=46&long=14&zoom=8&abs=-1 Latitude: 46.26750987433801 <br />Longitude: 14.14432082833148 46.26750987433801 14.14432082833148 Sat, May 17 2025 15:30:00 +0100 447b86f1a389331c24f235b5d0ba9cad http://carabiner.peeron.com/xkcd/map/map.html?date=2025-05-16&lat=46&long=14&zoom=8&abs=-1 Latitude: 46.49224323395079 <br />Longitude: 14.93175794552538 46.49224323395079 14.93175794552538 Fri, May 16 2025 15:30:00 +0100 7e03a70f7ef35f36ee87b04fd1d505d7