and what not just click one time and type on the numeric keyboard length wished? Very easy if it's integer meters

@unknownuser said: here the French Tut of Vectorisation's tool inside Inkscape Else link for Inkscape Load an Image then SHIFT + ALT + B (On my old version) you are right. Thats it! Now I have Lines they look much better. But it are still 2 parallel Lines. Why? Because a raster/pixel- Line has a thickness about some pixels. So Inkscape make 2 outline. But I need a middleline. May I feel it will come and work fine. See my pictures please [image: u1iu_vectorize.jpg]