A vector or raster graphic program for Tatting lace?

edited...

Muskaan answered a question in the last post, she used templates, sometimes used Robin's free template, I guess the polar guide with 12 divisions for snowflakes.

That made me go to Robin's blog, tutorial page. 

Keeping on

Graph with TatHelper

Checking old tatting books in the Antique Pattern Library web site, looking for inspiration for my graphic challenge, found one that it's not very known, Mrs Warren Needlework designs from 1869.

Tatted Relations

There are questions that arise when tatters have a pattern that calls for a specific thread size, "What if I use another thread size?", "What is the equivalence of thread size X?", "If I use another thread size should I add or remove DS to get the same dimensions of the work?", ¨How many?"

Is there a direct relation between thread sizes and the tatted work?