I need to create land cover classifications for a couple countries in central/eastern Asia. The largest country is 50,000km^2 and the smallest is 10,000km^2. What are my options for recent imagery? At this stage resolution is not my primary concern, so Landsat would be acceptable, but the scan line errors in Landsat 7 prevent me from collecting useful imagery from 2003 onward.
Likewise, I am willing to pay for imagery, but very high resolution data may require too many images to feasibly process.
My goal is to create a land cover classification that can be compared with a previous classification (~1990) created from a composite of Landsat imagery and aerial photos.
It appears that Landsat 8 data is now available through Glovis - imagery goes back to about April 2013. Finding cloud-free imagery is a bit difficult given how few images there are.