Re: MI Importing Autocad .dwg file to BNG

[Cliff Mugnier - University of New Orleans]

Andrew,

My guess is that you may have mixed up the order of the components of your
coordinates in some way.  For example,

Your BNG example for

X = 429362.55
Y = 414762.18

correctly corresponds to 

Lat = 53* 37' 41.9919" N
Lon = -1* 33' 21.4452" W.

If we swap Lat and Long components and compute an inverse we get:

X = 7889856.582 (not even close to your problem), and

Y = -5,833,524.920 which is suspiciously close to your problem.

The reason I point this out is that some software likes cartesian coordinates to
be entered Easting, Northing, some requires Northing, Easting.

Just a thought.

-- 
Clifford J. Mugnier ([EMAIL PROTECTED])
The Topographic Engineering Laboratory
Department of Civil and Environmental Engineering
UNIVERSITY OF NEW ORLEANS
New Orleans, Louisiana  70148

Voice and Facsimile: (504) 280-7095
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Hayes, Andrew wrote:
> 
> Hi all,
> 
> I am pretty naive when it comes to projections etc.
> 
> I have received an Autocad .dwg file and it is requested that I import this
> into MapInfo in British National Grid.
> 
> MapInfo only seems to allow the importing of autocad.dxf files, so I
> converted the file to MI.tab file using Geographic Explorer Quick
> Translator.  The resulting file comes in with Non-Earth Meters projection.
> Upon converting it to BNG projection when saving a new copy, the copy still
> loads in the same place (miles away from where I want it) with an example
> being x=1051925.36 y=-5112608.9 as compared to x=429362.55 and y=414762.18,
> as required.
> 
> I have tried to update the x & y centroids without success.
> 
> Does anyone have any suggestions??
> 
> Thanks in advance,
> 
> Andrew Hayes
> GIS Analyst/Programmer
> Wakefield MDC
> > Web:   http://www.wakefield.gov.uk/
> E-mail: [EMAIL PROTECTED]
> Tel: 01924-(30)5440
> Fax: 01924-(30)5424
>
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