So let me see if I understand the data - you have a series of latitudes with a starting and ending longitudinal point that defines a region. I suppose one could plot all the points where longitude and latitude meet and then link up the points to define the region?

I'm not quite sure if the gis software will do this but it does seem familiar. If nothing else it would give me something to do!

Roger - how did you originally get this data? what format? Or can you output it to an ascii file?

Canie