Timeline for What is the altitude difference between WGS84 and NAD27 Zone II?
Current License: CC BY-SA 3.0
14 events
| when toggle format | what | by | license | comment | |
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| Sep 24, 2015 at 16:02 | answer | added | AndreJ | timeline score: 1 | |
| Sep 23, 2015 at 21:46 | answer | added | Mintx | timeline score: 0 | |
| Sep 23, 2015 at 19:35 | comment | added | ed.hank | Well I would have guessed NGVD29 but I saw that another user said that he tried adjusting from NAVD88 to NGVD29 and there were still discrepencies. So just ignore me :) | |
| Sep 23, 2015 at 18:30 | comment | added | nickponline | @user3338197 I've added the coordinate description to the original post does this show what the vertical datum is? | |
| Sep 23, 2015 at 18:15 | history | edited | nickponline | CC BY-SA 3.0 |
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| Sep 23, 2015 at 17:59 | history | edited | nickponline | CC BY-SA 3.0 |
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| Sep 23, 2015 at 17:29 | comment | added | ed.hank | One is height above or below the ellipsoid and the other is not, check your vertical datum | |
| Sep 23, 2015 at 16:53 | history | edited | nickponline | CC BY-SA 3.0 |
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| Sep 22, 2015 at 21:56 | answer | added | mkennedy | timeline score: 5 | |
| Sep 22, 2015 at 20:49 | comment | added | nickponline | @mkennedy thanks for the response. I'm a bit of a newbie so I'm not sure. I exported the data from a program called Photoscan and it didn't give any options or settings regarding anything except coordinate system. | |
| Sep 22, 2015 at 20:45 | comment | added | mkennedy | For external checks, NGS website and look for NADCON (NAD83 to NAD27), GEOID12a (geoid undulation aka ellipsoidal height and NAVD88 difference) and VERTCON (NGVD29 and NAVD88). | |
| Sep 22, 2015 at 20:28 | history | edited | mkennedy | CC BY-SA 3.0 |
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| Sep 22, 2015 at 20:28 | comment | added | mkennedy | Can you expand on this a bit? Are the input values ellipsoidal heights? The output xy values are in US survey feet. What about the z/height values? What vertical coordinate system are they in? NGVD29, NAVD88, or...? I think I can match the values if I convert the input h to H using geoid12a, thus getting NAVD88, then converting to NGVD29. | |
| Sep 22, 2015 at 20:13 | history | asked | nickponline | CC BY-SA 3.0 |