Hi John,
I don’t work directly in our Sign Planning department but I do work really closely with them when planning out large jobs. I know they usually print out large scale CAD maps that we get from Architects / Engineers to help them plan where certain types of sign go. We also must adhere to strict ADA guidelines. I’m not very familiar with your DDA guidelines and how strict they are in the UK. There’s a good bit of info for ADA guidelines that might be similar to the DDA rules.
Guide for copy sizes at prescribed distances:
http://www.geminisigns.com/signletters/ … -chart.htm
Usually after working directly on large floor plan plots they mark everything up directly in CAD. It will also be a major help for you to go ahead and see if you can get a message schedule from your customer (unless you are doing it yourself?). These are usually in excel format, but we do sometimes get them as word documents or even pdfs. Of course the larger the job the more organized you’ll have to be. I’ll attach a partial screenshot of one of our message schedules so you can get an idea of how we do it.
Sorry, I’m not familiar with the Vista system. Is that a sign manufacturer or is it a methodology for sign planning?
Hopefully I’ve been somewhat helpful If you have any specific problems though, just post again or IM me. I’ll try to be advise as best I can.