I am a fan of the political compass, but I don't think the dimensions they have picked are the most relevant to Canadians in our election. I made a modified compass today, keeping the left-right dimension intact, but substituting the "authoritarian" dimension for a "green" one. The economy and the environment are the two big issues in this election, so it makes more sense to me to see them plotted together.
I got the environmental scores from the Sierra Club's report card http://www.sierraclub.ca/national/vote-canada/2008/voters-guide-climate-crisis-election.pdf
I took those letter grades, and converted them into percentages. For A- I put 80%. A B is 73%. For F+ I picked 40%, since that was the point in my highschool where you could fail a course, but qualify for a shorter summer school session than someone with 39%. After I had those numbers, I wanted to shift the scores so that 50% would represent the middle of the graph. To do that, I subtracted 50 from each score, then multiplied by 2 and divided by 10 to make it fit into the political compass. This resulted in the Conservatives having a score of (-2), the Greens having +6, the liberals having +5.4, and the NDP and Bloc tied at +4.6.
Plotting them all on, I was shocked by just how far the Conservatives are from the rest of the parties. The progressive parties are all bunched together in the same little area near the top, while the Conservatives are way down in "Oil Friendly" territory and on the far right.
It is also pretty apparent on this graph that the claims about the Bloc being a shadow of the NDP, and the Greens being a shadow of the Liberals have a lot of truth to them. Their positions here are nearly identical. I still think that the Greens are a distinct party though. The Liberals' environmental score under Paul Martin was much lower, closer to the centre, and has been moving up toward the Green Party over the last couple of years. Meanwhile the Greens have slid down slightly. Their close proximity is temporary and somewhat coincidental. To say that they are the same party would be like claiming that two cars passing each other on the highway are the same car. They may be very close together, but they are definitely distinct.
The Greens have been spending a lot of time lately saying that the NDP and Liberal's environmental platforms are incredibly weak, and arguing that a strategic vote is a horrible idea because one would have to vote for a party they dislike. But all those arguments fall flat when I look at just how close these parties are to each other. Voting NDP instead of Green means supporting a party that has a score just 1.2 points below that of the Greens. Compare that to going from Green to Conservative, which would be an 8 point drop. A dip to the Liberals or NDP would not be very significant. If the difference was larger, I could understand the argument, but with these parties so close together, I see no harm in a strategic vote.
The NDP and Liberals are nearly tied environmentally, but there is significant difference between them on economics. For someone with left-wing views to do a strategic vote for the Liberals would not make sense, as they would actually be supporting a moderately right-wing party. If you don't care about economics though, and are only concerned about the environment, then a strategic vote might make sense. It depends on what you are basing your vote on, and the dynamics of your particular riding.