Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have program writing unknown (for me) plot format. Please help identifying.


ax 16 16
xr 0 3500
yr 0 3500
tc 7 5 7 5
ra -12    6.    5. 0.1 0.1  0.963
ra -12    9.    5. 0.1 0.1  0.219
ra -12   18.    5. 0.1 0.1  0.143
ra -12    6.    8. 0.1 0.1  0.175
ra -12    9.    8. 0.1 0.1  0.862
ra -12    9.    8. 0.1 0.1  0.318
[... and so on...]
share|improve this question
up vote 3 down vote accepted

That's an HP Graphics Language plotter file.

In the future, you might try googling ".extension format" or ".extension file". 99% of the time, you'll find the file format in the very first result.

There are plenty of FOSS HPGL and HPGL/2 interpreters and convertors:

In addition to these, a lot of CAD and vector graphics programs support HPGL. Though there seems to be a lack of standardization in file extensions used, including: .hpgl, .hpg, .hgl, .plt, .hp, etc.

Also, later versions of PCL seems to support HPGL as well, so this further adds to the hardware and software support for the format.

More info can be found here.

Edit: Thank you G Koe for initially appending my comment to this answer and prompting me to make a little more effort to expand it. I've community wikied this answer so other freeware and open source apps may be added, as I'm sure HPGL's support is more extensive than what's currently listed.

share|improve this answer

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .