Editing Talk:2920: Survey Marker
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"datums." [[User:JohnHawkinson|JohnHawkinson]] ([[User talk:JohnHawkinson|talk]]) 14:38, 16 April 2024 (UTC) | "datums." [[User:JohnHawkinson|JohnHawkinson]] ([[User talk:JohnHawkinson|talk]]) 14:38, 16 April 2024 (UTC) | ||
− | FWIW, there is a marker at the end of my street, and I have seen others. I know "in the ground" is a figure of speech; all I have seen | + | FWIW, there is a marker at the end of my street, and I have seen others. I know "in the ground" is a figure of speech; all I have seen were set in rock (often with molten Lead/Zinc) so they didn't travel. My road we have boulders nobody is likely to move. Other places like Appalachian Trail, set in the mountain stone. In sandy South Jersey they set a couple tons of concrete and set the marker in that. --[[User:PRR|PRR]] ([[User talk:PRR|talk]]) 23:41, 16 April 2024 (UTC) |
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::"Help defend our timeline, make the switch to Swatch time 'today'!" | ::"Help defend our timeline, make the switch to Swatch time 'today'!" | ||
:: [[User:ProphetZarquon|ProphetZarquon]] ([[User talk:ProphetZarquon|talk]]) 13:50, 17 April 2024 (UTC) | :: [[User:ProphetZarquon|ProphetZarquon]] ([[User talk:ProphetZarquon|talk]]) 13:50, 17 April 2024 (UTC) | ||
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This reminds me of the prime meridian that's laid out on the ground at the Greenwich Royal Observatory for tourists to stand on. Unfortunately, it uses an old datum and the actual prime meridian under WGS84 is about 100 metres to the East. Fortunately, the British Isles are moving slowly North East so the two meridians will coincide at some point. [[User:Jeremyp|Jeremyp]] ([[User talk:Jeremyp|talk]]) 09:09, 17 April 2024 (UTC) | This reminds me of the prime meridian that's laid out on the ground at the Greenwich Royal Observatory for tourists to stand on. Unfortunately, it uses an old datum and the actual prime meridian under WGS84 is about 100 metres to the East. Fortunately, the British Isles are moving slowly North East so the two meridians will coincide at some point. [[User:Jeremyp|Jeremyp]] ([[User talk:Jeremyp|talk]]) 09:09, 17 April 2024 (UTC) | ||
::I use to live in a flat about a mile south of the Greenwich observatory and there was a marker for the meridian in the pavement (sidewalk) outside the flat.--[[Special:Contributions/172.70.85.13|172.70.85.13]] 07:54, 18 April 2024 (UTC) | ::I use to live in a flat about a mile south of the Greenwich observatory and there was a marker for the meridian in the pavement (sidewalk) outside the flat.--[[Special:Contributions/172.70.85.13|172.70.85.13]] 07:54, 18 April 2024 (UTC) | ||
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