Timeline for Why do different USGS Topo maps show different elevations for the same control point?
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
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| Oct 5, 2014 at 22:39 | answer | added | Martin F | timeline score: 2 | |
| Oct 5, 2014 at 22:21 | comment | added | Martin F | @Wes - On a topographic map it would only be orthometric height (ie, height above sea level). The other two are important in geodesy, though. | |
| Oct 3, 2014 at 18:07 | comment | added | Wes | Heights are also measured with different metrics: orthometric height, geoidal height, ellipsoidal height, etc. | |
| Oct 3, 2014 at 17:58 | comment | added | mkennedy | You can also see if there are NGS survey mark datasheets for the points. The data sheets often include Superseded coordinates so you can track changes over time. | |
| Oct 3, 2014 at 17:56 | history | edited | mkennedy | CC BY-SA 3.0 |
fixed some confusing grammar errors
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| Oct 3, 2014 at 17:36 | comment | added | mkennedy | What do the maps list for the vertical datum? They could have switched between NGVD29 and NAVD88. | |
| Oct 3, 2014 at 17:35 | review | First posts | |||
| Oct 3, 2014 at 17:37 | |||||
| Oct 3, 2014 at 17:33 | history | edited | Devdatta Tengshe | CC BY-SA 3.0 |
improved tittle, formatting & tags
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| Oct 3, 2014 at 17:31 | history | asked | brasshat | CC BY-SA 3.0 |