alfie hope Posted November 9, 2011 Share Posted November 9, 2011 Up until this week i'd never realised the power of OS maps in CAD - i didn't know it was possible to effectively locate your building in the correct place on the globe so that it can be set out on site with theodolites etc.. How do i even begin organising such drawings so that they are correct?? I'm working on a large project with vast building sizes and 400+ space car parking areas so i need to know how when i get an OS map to make sure it's in the correct location - so that referenced drawings from road engineers etc come in at the correct point on the page etc.. Am i missing the point?? Can anybody help!? Thanks, Alfie Quote Link to comment
Bryan G. Posted November 10, 2011 Share Posted November 10, 2011 check with Jonathan Pickup, he has great training vids and books and I believe I saw that he covered this issue. Also try VW help and the PDF book. they can walk you through this. Also I just noticed your from the UK, Tamsin Slater is a fantastic trainer in your area(over the pond that is). Quote Link to comment
Bryan G. Posted November 10, 2011 Share Posted November 10, 2011 side note. You mention OS what does that stand for. here in the US its Operating System, but I gather it refers to something else. just curious. Quote Link to comment
IanH Posted November 10, 2011 Share Posted November 10, 2011 (edited) OS in this context is Ordinance Survey. Been around far longer than computers - 1791. http://www.ordnancesurvey.co.uk/oswebsite/ Edited November 10, 2011 by IanH Quote Link to comment
Bryan G. Posted November 10, 2011 Share Posted November 10, 2011 Oh yes! not often referred to in my local area. Thanks Quote Link to comment
Chris D Posted November 10, 2011 Share Posted November 10, 2011 We use Eastings and Northings at OS coordinates to set out our buildings, so it's important to have the building at the correct coordinates. HOWEVER, I wouldn't necessarily advise that you draw the objects at the correct coordinates, as they will be so far away from the Vectorworks origin you will have issues (literally millions of millimetres away from the origin). Hatch patterns are a good example....even a decimal point aberration in the pattern means that by the time the pattern is calculated all the way from the origin to your site, the lines won't meet at all. INSTEAD, draw at the origin and DLVP the building (or building site) to the correct location. Then you can calculate your Eastings and Northings from there. Quote Link to comment
Art V Posted November 13, 2011 Share Posted November 13, 2011 ... INSTEAD, draw at the origin and DLVP the building (or building site) to the correct location. Then you can calculate your Eastings and Northings from there. Chris, How will this affect VW performance if a DLVP is used as you suggest? Think of a location of approx. 10km x 10km, with 300k-500k+ objects, in an UTM grid with metres as unit. And then I have to start putting my stuff on top of that. Would you suggest to put everyting at origin and DLVP the whole thing to coordinates, or put the location at coordinates, my stuff at origin and DLVP it on top of the location? I know, I can try myself, but if you say there will be a noticable decrease performance in your case, even if it is not very big, then I can probably save myself the trouble (unless you have similar drawings regarding size and number of objects where you are doing this). Quote Link to comment
alfie hope Posted November 29, 2011 Author Share Posted November 29, 2011 What is DLVP? And how does one set eastings and northings? Quote Link to comment
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