Importing an ESRI ADF file lands in wrong location

[ouspensky]

OK here is the problem

I have a Civil3D file with Drawing Settings = WGS84 UTM-Zone44 North

Map3D coordinate system = WGS84 UTM-Zone44 North

a USGS DEM from HYDROsheds data set (tile = N40E80) also note  this DEM is a folder of multiple ADF files

when using FDO provider the DEM comes in just fine but it lands in the wrong location thousands of kilometers away.

When I load the same shape files into ArcMAP10 with spatial reference as WGS84 UTM-Zone44 North everything lines up perfectly.

The header prj.adf file is this:

PROJECTION GEOGRAPHIC
UNITS DD
DATUM WGS84
PARAMETERS

so how do I make it come into Map3D correctly???

[ouspensky]

Update: both point cloud and FDO provider raster generated from ADF land in the same location.  the Southwest corner point defined as N40E80 by the USGS is reported in civil3D as N0.0E76 HOWEVER the UTM grid is Northing=40m Easting=80m

somehow this file is being read the wrong way and the lat/long is being used as UTM grid meters causing the file to land in the wrong location, how to fix this ?????

[ouspensky]

And the answer was...

Change the Coordinate system from UTM to LL84

To be exact use ESPG code=4326

now the next question why?? why is this necessary?

[antoniovinci]

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ouspensky wrote:

why is this necessary?

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The answer is contained in your previous post:

The header prj.adf file is this:
PROJECTION GEOGRAPHIC
UNITS DD
DATUM WGS84

Sounds like Autocad doesn't understand that Decimal Degrees header, so you need to declare the lat/long CRS.