I agree with robert edwards
For vectorizing after scanning I am using Streamline 4.0 from Adobe. Usually
you still need some hand clening other wise you end up with a lot of non
existing object. I been able of only obtaining lines. To get closed
polylines of better polygons only work with veru simple drawing.
I understand that Corel Draw family have a vectorizing option.
Steve riese How did you do the "mask out color process"?
Juanse Barros
Referencia S.A.
Temuko - Chile
-----Mensaje original-----
De: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
Para: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
Fecha: Jueves, 06 de Enero de 2000 11:54 p.m.
Asunto: Re: MI Raster to Vector Conversion
>[EMAIL PROTECTED] wrote:
>
><< I have JPEG images of 1:50,000 topographic maps. From these, I need to
>extract feature objects (roads, rivers, buildings, etc.). I can mask out
>colors and save different copies (e.g., save a copy with only green to
>represent trees), but how do I proceed to convert these green areas into
>vector objects? I've looked through the MI/MB documentation, but couldn't
>find anything. The area I've got is about 40km x 50km so, naturally I'm
not
>looking forward to manually coding the points! Any help or suggestions? >>
>
>I my view you describe two different types of "raster-to-vector"
conversions:
>one for lineal features (roads, rivers, political boundaries, etc.) and
>another for areas (forested areas, lakes, etc.). And I believe different
>tools are needed for these two types of problems.
>
>For conversion of lineal features any standard raster-to-vector tool used
in
>drawing applications will do the trick. However, in converting areal
features
>you will want to make sure that adjacent areas in the raster image don't
>result in vector-based regions with a lot of slivers and overlaps along
>common boundaries. For this you want something specially designed for
>extracting regions from the raster image, such as the MapTools region
>extraction tool. Information about this tool can be found at the URL:
> http://members.aol.com/MapTools/
>
> Robert Edwards
> The MapTools Company
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