Hy,
I'm building up my own iconography, a set of pictograms that represent ideas so that i can connect them to illustrate more complex systems. I would like some suggestions of which is the best manner to do that. How can I do a library of pictograms? how shall i add them to my schemes? which is best and easiest way to draw blocks like the ones shown in the example image (i.e. the protractor and the ruler)? would they scale properly?
I looked at the pigs example but is quite non-intuitive. Any reading suggestions?
Thanks for the guidance.

potraceto convert it to vector 40 goto 30 50 end – percusse Aug 29 '13 at 17:59tikzpictureenvironment. – Sik Aug 29 '13 at 18:25Using root user seems to go through but it saves nowhere, the file is not there
– Sik Aug 29 '13 at 22:23