While libertarians are quite familiar with the Nolan Political Science Chart, it isn't the only attempt to more accurately graph the political map. Moreover, as shown in Conservatives Versus the Nolan Chart it doesn't depict the political landscape as accurately as it could, given that modern American conservatism isn't synonymous with Nolan conservatism.
Another chart that is slowly making waves is the Pournelle Chart, another two dimensional representation. He starts his essay with the standard attack on the inconsistencies of the standard one-dimensional spectrum, but proceeds from there to describe his own alternative model.
The first axis of his chart is "liberty", which could be considered the cross-axis of the Nolan chart ranging from statist to libertarian. That is common to many attempts to rectify the political spectrum, but Jerry Pournelle felt that was inadequate. The reason is that it groups fascists and communists on one end as if they are the same, and it groups anarchists and libertarians at the other end as if they are the same. He felt a second axist was necessary to separate out these ideologies.
The axis he came up with is called "attitude towards planned social progress" or "rationalism", the belief that society's problems can be solved by reasoned solutions. After adding this axis he was able to differentiat the communist from the fascist and the libertarian from the anarchist.
On the corner of statist and rationalist one finds Communists and Socialists. The corner of statist and irrationalist one finds Fascists and Theocrats. The corner of rationalist and anti-statist is occupied by the libertarians and objectivists. Finally the corner of irrationalist and anti-statist is Anarcism and counter-culturalism. Conservatives and Liberals are both near the center by having midway opinions of both the state and the ability of planning to achieve social goals.