ID:913255
 
Keywords: isometric, map, problem
Code:
http://www.2shared.com/file/qbEVcHlq/Worldcraft.html

Problem description:

I started to work on Isometric this weekend and came across a few problems as I was trying to do a few systems. Was wondering if anyone would like to chip in and help? I recorded a video showing some problems I've had.
http://screencast.com/t/vdmPb8BgPqkG
Also, sorry for low voice on video. Mic sucks o.o
I think this image shows you what you want pretty simply.

Image and video hosting by TinyPic

Your blocks edge is the red mark so even though through isometric it looks like you are are elevated you are still limited to the original blocks square. So with this you can see the edge of the blue blocks base turf is met prior to it's icon.