For 1px lines the only thing you have to remember is to put the points on half-pixels (annoying, but you can just wrap a <g transform='translate(0.5 0.5)> aroun

For 1px lines the only thing you have to remember is to put the points on half-pixels (annoying, but you can just wrap a <g transform='translate(0.5 0.5)> around your drawing if needed. The other thing would be shape-rendering='crispEdges' which also helps, but not everywhere.