My aim is to classify vegetation types, using areal/ satellite imagery, in a small (4km^2) area of the North York Moors (UK). This area contains two small rivers and their catchment areas; one of the rivers is in an area of planted forestry and the other open heather moorland. I plan is to classify the image to better discriminate between the vegetation types to teach students about the effect vegetation has on rivers.
I have an area in mind and have done this kind of classification exercise before, however only when following tutorials and using Landsat data in ArcGIS. I now need help locating multi spectral imagery of high enough quality for my 4km area (so not Landsat) and help to classify it using QGIS.
My question is therefore two fold:
a) where can I purchase/ acquire such high quality data?
b) how do I preform classification on a multi spectral image which is not Landsat in QGIS (or is it even possible)?