![]() Inkscape CAN handle such a project, especially if you use layers. Well it's hard to describe, but I think it would be a really lot of work to break up the automatically traced image into it's components as shown on the original. If you had a straight line in your raster image, Trace Bitmap probably produced, not an open path with 2 nodes, but a closed path pending on the quality of the original, maybe up to 10 or 20 nodes. Trace Bitmap does something similar to that. If there's a little bit of a curve, you might have 8 nodes. But after stroke to path, you now have a very long, very skinny rectangle of 4 nodes. Have you ever used Stroke to Path? You could have a path with 2 nodes, just a straight line. I'll preview what you'll see, once you get started, if you decide to do that. But you're right, it will take some time and a lot of work! Oh ok, that's what you just said in your message, lol. If this is the case, it will take some time to break up the large object, and there will be a lot of node editing. And in reality, if you zoom into a sharp corner, you'll see that it is indeed rounded.Īnd now that I know it's a street map, and that you want to include buildings, and other things, I think you may quickly realize that your map might be one large object (of what you said comprises over 10,000 nodes!). And also, you'll start to see corners which appeared to be sharp, are becoming rounded. But what I think you will find is that the more you click it, the fewer nodes are removed each time. There IS a way to reduce the number of nodes - Path menu > Simplify. I am now thinking unless I can find a way of automatically reducing the number of nodes while preserving rendition quality, maybe the 'Carbon trace' method suggested before is more efficient ? As this is 2-black&white line-drawing, any suggestions for alternate settings in the Trace Bitmap dialog ? However, when I used Irfanview to reduce the default 16k colours in the 'black&white' greyscale source to 2 colours, sharp then blur, remove dithering Inkscape then produced 12.391 nodes - bigger than before, so that did nt help.Īnother thought: I used the Default Single scan parameters, and default option values. It also occured to me now, maybe I should have tried preprocessing the source JPG to present an easier task for Trace Bitmap to use. I am also thinking even if this also results in a perfect rendition, the possible 10,312 objects produced, may be too big a job to edit to reduce the 10,000 objects down the few hundred buildings shown on the Street Plan ? I was thinking the next step is a further conversion, from a single 10,312 node object down to a few hundred separate objects. convert text to the more efficient SVG Text object type, convert some buildings to simple rectangle objects, perhaps add fill colours to some buildings. However, as a step 2, I want to be able to edit the logical objects (5 streets containing a few hundred buildings) in the SVG version, eg. The SVG version is also black lines on white background and visually is near perfect reproduction of the 170KB JPG source. Over the weekend made progress using your suggested 'Trace bitmap' using the defaults (Single scan) which successfully converted my simple streetplan to a SVG that was a big 1.2MB file containing 1 object of 10312 nodes. My facilities are limited to source streetplan on paper and a digital camera I used to get a digital copy. ![]() I see since my logon last Friday some further input. ![]() Sorry, I am a long way from internet access, so prepared this reply at base and took it to a cybercafe for upload. Or Mediterranian.? (My brain seems to be much older than the rest of me, lol ) But if you search with "map" you should find it quickly.or.rats, I can't remember.I think it might have been a map of Tanzania, if the "map" search returns too many results. And there's another very recent one, but I can't remember the title. ![]() One recent topic is entitled "Carbon Paper". Usually folks who do this (again including me) prefer to reduce the opacity of the layer with the original, and so it's just like tracing the map on tracing paper (except the Inkscape pen takes some practice.however for me, much less than with Trace bitmap).Īnd as druban suggested, you can find more detailed tips by searching the forum. You would open Inkscape, import the map, add a new layer, and draw on the new layer, directly over the map. So if time is a factor, you might want to go with the other approachĪnd the other way is to trace it by hand. There is quite a learning curve, it seems, for most users, including me. One would be to use Path menu > Trace bitmap. In general, there are a couple of ways to approach it. ![]()
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