dwg2svg - Example

[dmericksen]

Can you provide an example of the strings to pass to set drawing units to inches in the resulting SVG? I'm passing '-g' but the units in the resulting SVG file do not have the correct units.

The documentation does not make this very clear.
https://qcad.org/en/products/qcad-command-line-tools

[andrew]

The SVG output unit is the same as the drawing unit if possible (mm, cm, in).

If the input drawing is unitless or has the wrong unit, you can use the -u in switch to tell dwg2svg to interpret the units as Inches.

If the coordinates are wrong in the input drawing or you want to convert the unit, you can use the -s switch to scale the output.

Let's say you have a drawing in mm that you want to output in Inches, you could convert using:

Code: Select all

dwg2svg -u in -s 1/25.4 -o output.svg input.dxf

This means:
- interpret the coordinates as Inches (and output in Inches)
- scale output by factor 1/25.4

[dmericksen]

Thanks for the example. I'm still having trouble though. I think because the source file does not have drawing units specified. This output file does not open with the expected size in vector programs like Adobe Illustrator.

Input File:

12.dxf

(99.25 KiB) Downloaded 242 times

Code: Select all

dwg2svg -f -g -u in -s 1/71.94 -o output.svg input.dxf

Output File:

12.svg

(8.45 KiB) Downloaded 311 times

[andrew]

Which version of QCAD are you using?

If not the latest, does dwg2svg -h report the -u switch? If not, that was added in a later version.
The SVG files you've attached does not specify a unit which means that size would default to pixels (i.e. the SVG is 12 pixels wide).

[dmericksen]

I'm using qcadds-3.20.1.6-pro-linux-x86_64

[andrew]

I'm assuming the expected size is about 12 inches wide (11.5").

Since the drawing unit is also inches, you'd only have to specify the input being inches (i.e. no scale):

Code: Select all

dwg2svg -f -g -u in -o 12.svg 12.dxf

You can see if the SVG is correct by opening it in a text editor. Its header should look like this:

Code: Select all

<svg width="11.5472in" height="2.0409in" ...>

If an application displays it at a different scale or size, the error or configuration error would be with that application.