vectoralize grid in dwg

[u046]

Hello I hope not to be ot. use autocad 18.0. My problem, however, concerns how to import urban maps in autocad to be able to change them (heavyly) from raster images (obtained from a3 1200dpi scanner). Regardless of the software used to vectorize, the result I get is quite poor (the whole map in spline objects, irregular lines, multiple and fragmented), to the point that to "repair" I would first create it ex novo.

I would like if possible advice or opinions both on the program to be used for converting from raster graphics to vettroiale (and its settings) and for the best and fast process once the obtained file is opened in autocad. thanks in any case and in advance.

 

[PlannerRoad]

a presentation is always welcome before:
http://www.cad3d.it/forum1/showthread.php?t=187Moreover, the question has already been dealt with several times, and these are just a few links:
http://www.cad3d.it/forum1/showthread.php?t=11164http://www.cad3d.it/forum1/showthread.php?t=21451http://www.cad3d.it/forum1/showthread.php?t=9497http://www.cad3d.it/forum1/showthread.php?t=7502http://www.cad3d.it/forum1/showthread.php?t=4259http://www.cad3d.it/forum1/showthread.php?t=861as light, while spending money on a good program, there is no vectorizer that holds if you want a perfect result.

 

[u046]

Thank you: presentation made. I do not expect to have an optimal result (which I knew practically impossible) but if anything to find the best and quick way to treat the tide of curved lines once vectorization is accomplished. if this post is redundant I can intervene in the previous ones?

 

[Ezio Olivato]

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as light, while spending money on a good program, there is no vectorizer that holds if you want a perfect result.

How not to quote? !
be also the best program in the world in conversion, at most you could get a dxf from your starting image. but what dxf?! depends on the program you use.
if then the work that awaits you is of immanent proportions: whole cities, quarters or anything like this, you should use your image as an external reference, and then recalc on the image lines not to be changed. In this way you have the track on which to operate your case changes. a little like when you wonder if you can convert a pdf to a dwg????? Do it first!:finger:

 

[u046]

certainly to get a clean map starting from a raster image reference and recalculating manually is the best solution. However roving with maps formed by 2 (or 4) a3 with things like This is what o This is what without being able to find vector equivalents and having the need to change a consistent part and obtain a presentable file (and to present) in acceptable times (all with scale adherence, annotations and correspondence of the previous map) the recalco is a hardly considered option. I can't even override the raster referee's modifications while maintaining that (I'm not allowed). I would have wanted to understand, place that the illustrator settings in the dynamic recalc are the best, such as being able to become lines those that have become multiple spline with hundreds of points, eliminate overlapping objects or with small splines that should not be there and so on. I think, however, that I will have to resign and acknowledge that I cannot get something acceptable on this path. Thanks anyway.

 

[roberto 2011]

The polylines you can explode, I on a button I also have the command to explode them all on the flight, the double lines you can delete them with the special command, which is called overkiller (named 99%...), but the problem is that the lines that remain are still worthwhile.

It is decidedly done first to hand it back, unless tristan :wink: don't give us good news about the experiment proposed by emigrant....... :smile:

 

[Tristan]

have you tried to ask the agency that provided you rasters if you can have dwg?

 

[Tristan]

decidedly you do first to hand it back, unless tristan gives us good news about the experiment proposed by emigrant

I wouldn't think of it. . .

 

[u046]

have you tried to ask the agency that provided you rasters if you can have dwg?

Obviously I thought about it, but in some cases it is maps of "predigital era", in other cases they answered no. the third case is the most curious: the maps in dwg were there, but they were obtained directly from satellite photos in an automated way, with "incomprehensible" changes and the worst usability of what I got from the supplied images of raster type.

 

[Ezio Olivato]

if I do not remember badly on the net there is an online converter of pdf to dxf, if I find the link the place.
Here he is.http://www.pdftodxf.com/

 

[Fulvio Romano]

Hello I hope not to be ot. use autocad 18.0. My problem, however, concerns how to import urban maps in autocad to be able to change them (heavyly) from raster images (obtained from a3 1200dpi scanner). Regardless of the software used to vectorize, the result I get is quite poor (the whole map in spline objects, irregular lines, multiple and fragmented), to the point that to "repair" I would first create it ex novo.

I would like if possible advice or opinions both on the program to be used for converting from raster graphics to vettroiale (and its settings) and for the best and fast process once the obtained file is opened in autocad. thanks in any case and in advance.

once I used a "vettorializer" for a long, heavy and complicated work. the result was great, but there is to spend some money.

the "vettorializer" in question was a student of architecture who had a typizer, rounded the parent's loaf by bringing in autocad old drawings. . .

I don't know, maybe it can be a point.

 

[roberto 2011]

then, I tried to send 4 map extracts in pdf, which releases the catasto, but I returned an error message with apologies of s.h.

I downloaded the trial that is worth 7 days and I did not succeed, always gives error, to transmit the pdf above. He says there's no data...
I tried with a pdf of the ptpr of the region, very complex, and returned me a dxf with the only borders of the municipalities. seems to have well recalculated the original boundaries (with pl width 0.33), but it is a little bit small to talk about suitable usage. :frown:

Has anyone else done any more evidence?