Planar analysis is a way of drawing with points and lines.  Although with many planar analysis artists you can hardly tell they are doing it in their work.  In Richard Diebenkorn’s painting above, when you look at the housing the streets and the grass you can tell that he is uses planar analysis base off the line work and the block like form of everything.  It is a little harder to see that he is using it in the background on the hill that is to the right of the painting.  If you look the hill somewhat rounds at the top, but the sides just goes straight down like a straight line.