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Jul 27, 2017 · My root issue is that I have elevation values in NGVD 1929 that need to be related to a DEM which has elevation values in NAVD 1988. Is there a way that I can convert elevation from one data to another en masse?
Jul 1, 2020 · I want to convert the elevation data obtained from Google elevation API to NAVD 88. I understand that Google uses WGS84 with EGM96 Geoid. Do you know what I should do to convert the elevation data? Also, is there any python library that could help me with the conversion?
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How do I convert elevation data from NAVD 88 to NGVD 29?
How do you calculate the elevation in NAVD 88?
How do I know if NAVD88 or NGVD29 is ellipsoidal?
How to convert NAD83 to NAVD88 in ArcGIS?
To convert from NGVD29 to NAVD88 you'll need VERTCON or CORPSCON (or ArcGIS 10.5.1 or ArcGIS Pro 2.1, see disclosure at end of answer). Once you NAVD88 elevations, you can use the GEOID12B geoid model to convert to NAD 1983 (2011) (or another re-adjustment) ellipsoid heights.
Oct 31, 2019 · NAD83NDV88 = pyproj.Proj("+init=EPSG:5498") results = pyproj.transform(wgs84, NAD83NDV88, lng, lat, z) which returns : (43.70012234, -79.41629234, 100.0). My logic was to take a WGS84 coordinate with an ellipsoid elevation and try to convert that into NAD83 NADV88 (epsg:5498). But it seems like it is not that simple.
Jun 16, 2017 · There's not really a way to tell unless you can find some reference data to confirm what either the NAVD88 / approx MSL / height relative to geoid OR the ellipsoidal height is. One way is to find a topographic map with elevation contours for the area to get a general idea. That would give you NAVD88 or NGVD29 elevations.
Jun 15, 2020 · A) Convert WGS84 elevations to ellipsoid heights using the EGM2008 model. B) Convert from WGS84 to NAD83 (US feet) using transformation. C) Convert from NAD83 to NAVD88 by either GEOID12B or GEOID18.
May 10, 2020 · Good explanation. WGS84 (elipsoid) and EGM96 (geoid) are two different models, with different applications. When you see a height in a map, it is usually a height over the geoid (orthometric height), but when you get one from a GPS device, it is usually a height over the elipsoid.
