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2 votes

Is EGM2008 different to WGS84 ellipsoid?

In short I have a DEM dataset which describes the vertical reference used as "height above the WGS84 ellipsoid". As I understand it this assumes vertical values to have MSL as a reference ...
mins's user avatar
  • 207
1 vote

Transforming from NAD83(2011) or from WGS84 gives the same result (pyproj)

You get that result because for Proj NAD83(2011) and WGS 84 mean the same. You can get a full report by testing the transformation with Projinfo. projinfo -s epsg:6318 -t epsg:4326 Candidate ...
user30184's user avatar
  • 63.3k
0 votes

Convert WGS84 to Local Point

You could convert WGS84 to ECEF coordinates, then choose a ref point (should get a matrix 4x4) to convert to ENU coordinates. But WGS84->ECEF is costly, you may directly use mapbox/cheap-ruler to ...
dvorak4tzx's user avatar
0 votes

How to convert wgs84 from ellipsoidal height to mean sea level i.e. height above goid, with pyproj?

The solution (derived from Scott Staniewicz's answer to this question) is to use a composite transformation: from pyproj import Transformer t=Transformer.from_crs("epsg:4979", "epsg:...
Robert Calhoun's user avatar
5 votes

How can I determine point coordinate sysystem?

On the IPUMS NHGIS website they say: "We project the data into Esri's USA Contiguous Albers Equal Area Conic Projected Coordinate System" So that would be ESRI:102003 NAD 1983 Albers ...
Pointdump's user avatar
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