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non zero reference point in coordinate Transformation

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Message 1 of 3
kbarnettza
1274 Views, 2 Replies

non zero reference point in coordinate Transformation

Civil 3D 2015.

Setting up a new Template.

(refer attached DWT)

 

When applying a 180 rotation Transform, the reference point in not 0 0 0 0

How/Where can I fix this?

 

Example:

Default Civil 3D, no datum:

 

nodatum.png

 

No datum, transform reference point is correct (0 0 0 0 0 0 0 0 0):

 

nodatum-transform.png

 

 

Then...

I change Datum to required system (South Africa Harte-Lo29):

 

hartlo29datum.png

 

 

I need to transform to keep North direction equal to WCS Y+ direction, check the reference point numbers (not zero):

 

hartlo29datum-transform.png

 

User will need to reset all values of reference point to zero before Apply...

(refer attached DWT)

How can I fix this?

 

Thanks a stack (a very big stack),

 

Kevin

 

 

2 REPLIES 2
Message 2 of 3
kbarnettza
in reply to: kbarnettza

This is not due to the template used.

It is a problem that has crept in with version 2015 of Civil 3D, users in South Africa will need to be very careful.

 

Message 3 of 3

Good Day Kevin

 

Thank you for your post.  I am having a similar problem and I am not able to solve it.  

 

Our company recently upgraded from the 2012 version to the 2015 version of Civil 3D.  I need to do a design by having a reference map in the background. Previously I was able to import from Google Earth and then just rotate the map 180deg. and manually swopping the negative value from X to Y

 

My Project falls within the Lo 29 Coordinate system, Mpumalanga, South Africa. As usual with Civil 3D, if the actual coordinate system is correct on your drawing the map reference is 180deg around the 0 point in the northern direction.  Since I am not able to rotate the map anymore and use the geolocation reference to obtain a bing map.  The map does not overlay over my surface created.  I have also transformed the coordinate system in the drawing setting but it didn't work. 

 

I will appreciate any assistance.  

 

Regards,

Christiaan 

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