I am sharing this small but important dataset on carbon emission of Indian states... but on one implicit condition: You must also share your clustering results.
Actually, I have used K-means on this; if you have some other algorithm, I would like to know the results, and compare between them... and of course share my results too with you !
the location coordinates of keypoints on images are two dimensional, some images can yield 1000 keypoints which should be enough for your analysis. if you have access to matlab, try the command "help detectsurffeatures"
Take the satellite images (it is two dimensional in nature) and process it. You group the pixels in to vegetation (one cluster), lake(another one cluster), households (another cluster), river, mountains etc.,