Burkina Faso ITRF2008 (EPSG 5332) assistance

[Caroline Hilton @ Pelican GeoGraphics]

Hi, does anyone know the coordinate system parameters for the above projection (Burkina Faso Transverse Mercator)?

From an online search the suggestion is that it's similar to WGS84, but the user is saying data has a 60km+ offset when they use the relevant WGS84 zone.

Many thanks in advance

Caroline Hilton

[Treichel, Kent (MDOR)]

Clifford Mugnier used to reply to all projection questions on the list.  He is on linkedin, on the faculty at Louisiana State.  I don’t know how else to get in touch with him.

This article may have the info you need.

https://www.asprs.org/wp-content/uploads/2022/08/09-22-GD-Burkina-Faso.pdf

 

 

From: mapi...@googlegroups.com <mapi...@googlegroups.com> On Behalf Of Caroline Hilton @ Pelican GeoGraphics
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Subject: [MI-L] Burkina Faso ITRF2008 (EPSG 5332) assistance

 

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[Peter Horsbøll Møller]

Hi

 

I came across this post on GIS StackExchange:

https://gis.stackexchange.com/questions/418289/burkina-faso-transverse-mercator-projection

 

It seems you need to included a shift when using the WGS89 datum for this projection.

Instead of using this projection string that uses GRS80:

"BFTM_TM_GRS80", 8, 33, 7, -1.5, 0, 0.9996, 600000, 0

 

you can try with this that uses a shifted WGS84

"BFTM TM ITRF2008", 8, 999,-118.0, -14.0, 218.0, 7, -1.5, 0, 0.9996, 600000, 0

 

I am however not entirely sure this is correct as it states the Burkina Faso TM projection is based on the GRS80 ellipsoid

 

Peter

 

—

Peter Horsbøll Møller

Principal Sales Engineer - Distinguished Engineer

Precisely.com

 

From: 'Treichel, Kent (MDOR)' via MapInfo-L <mapi...@googlegroups.com>
Sent: Tuesday, 31 January 2023 03.39
To: mapi...@googlegroups.com
Subject: RE: [MI-L] Burkina Faso ITRF2008 (EPSG 5332) assistance

 

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[Caroline Hilton]

Thanks a lot Peter, I'll get the client to have a go with this :)

[Caroline Hilton]

Thank you Kent, I will pass this on to the client and contact Clifford!

[Andrei]

You need to specify GRS 80 ellipsoid as part of PRJ string:

"BFTM TM ITRF2008", 8, 999, 0, -118.0, -14.0, 218.0, 7, -1.5, 0, 0.9996, 600000, 0

Andrei Veselov