Code Red > AutoLISP (Vanilla / Visual)

Help with lisp Import data between autocad and google earth

(1/2) > >>

anhquang1989:
I find that there are many programs that switch between autocad and google earth.
But I can not use them in Vietnam because Vietnam uses a separate coordinate system that is VN 2000

Article 1. Now use the system parameters to switch between international coordinate system
WGS-84 ( zone 48 and 49)coordinate system of national and VN-2000 is as follows:
1. Parameter shifts the origin:
-191.90441429 M; -39.30318279 m; -111.45032835 m.
2. The coordinate rotation:
-0.00928836 " ; 0.01975479" ; -0.00427372".
3. Scaling length:
k = 1.000000252906278

Article2: With each province using a separate axis

http://alophukien.net/kinh-tuyen-truc-he-toa-do-vn2000-cho-cac-tinh

Look forward to your help.Thank you very much!

VovKa:

--- Quote from: anhquang1989 on August 22, 2017, 01:35:12 AM ---I find that there are many programs that switch between autocad and google earth.

--- End quote ---
i believe you should contact the authors of those programs and ask for VN 2000 support

anhquang1989:
Hi. Vovka.
I've seen them but most of the programs are build with vba and I still have not contacted the author.
Especially I love lisp so I hope to see it and I believe that some other countries have similar problems, so when it is established it will help a lot.

VovKa:

--- Quote from: anhquang1989 on August 23, 2017, 09:44:42 AM ---some other countries have similar problems

--- End quote ---
i would not call them "problems"
it's a standard situation for coordinate systems that were realized before WGS84 era
and it could be worse
for example in Ukraine to covert old  soviet coordinates to the new WGS84 based system one must use not only axis shift and rotation but also affine transformations based on the TIN

anhquang1989:
Yes. I agree with you.

Navigation

[0] Message Index

[#] Next page