Help!!: Raster Image to Topo Map
Help!!: Raster Image to Topo Map
(OP)
Hi,
I don't know if it's a stupid question.
But i was longing to know, if its actually possible to convert a hardcopy of a topo. map to a digital map.
I've scanned a topo map & inserted it in CAD as a Raster Image.
Is it possible to draw polylines automatically along contour lines in the Raster Image??
Lets say we got the polylines along the contours as in Raster Image. Now can we assign elevation to these polylines & use them for the volume, watershed calculations??
Please feel free to post your ideas! Plz....
I don't know if it's a stupid question.
But i was longing to know, if its actually possible to convert a hardcopy of a topo. map to a digital map.
I've scanned a topo map & inserted it in CAD as a Raster Image.
Is it possible to draw polylines automatically along contour lines in the Raster Image??
Lets say we got the polylines along the contours as in Raster Image. Now can we assign elevation to these polylines & use them for the volume, watershed calculations??
Please feel free to post your ideas! Plz....





RE: Help!!: Raster Image to Topo Map
But if you can't do this already by hand with a planimeter on the original drawing, I don't know why you would bring this into the computer not knowing how to do this already.
To begin with, do you know how to check that your topo's scale is correct in the X and Y directions once scanned in?
B+W Engineering and Design
Los Angeles Civil and Structural Engineering
http://bwengr.com
RE: Help!!: Raster Image to Topo Map
http://3dfmaps.com/FaQ/convert.htm
TTFN
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RE: Help!!: Raster Image to Topo Map
Have you used that contouring program? It looks really good and appears to only cost U$99.00.
Dik
RE: Help!!: Raster Image to Topo Map
Alternately, I wonder if a digital elevation map might be easier to wrangle: htt
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RE: Help!!: Raster Image to Topo Map
The easy way to check that is by using LDD which might take another 3 minutes. LDD can also elevate quickly like this as well, and label the contours.
B+W Engineering and Design
Los Angeles Civil and Structural Engineering
http://bwengr.com
RE: Help!!: Raster Image to Topo Map
For intermediate contours not in the JPEG, do a search as there is a LISP program available.
RE: Help!!: Raster Image to Topo Map
Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com
RE: Help!!: Raster Image to Topo Map
B+W Engineering and Design
Los Angeles Civil and Structural Engineering
http://bwengr.com
RE: Help!!: Raster Image to Topo Map
Hell, when I was 16 years old and an intern, I was doing cut and fill calculations for landfills by the grid method by overlaying two vellums on a light board. Sometimes elbow grease is the best way to get something done.
Hydrology, Drainage Analysis, Flood Studies, and Complex Stormwater Litigation for Atlanta and the South East - http://www.campbellcivil.com
RE: Help!!: Raster Image to Topo Map