I'm modelling insect populations over time (1968 - present) in the UK at over 500 sites. I have detected a decline in sites that are mainly suburban (based on 500m radii using the CEH Land Cover Map 2015). I would like to know which of these sites were already suburban in 1968, and which had been developed at some point over the time series. Ideally, I would like something like a gdb file showing the urban/suburban land cover of 1968 so I could calculate exactly how much development has occurred at each site, but I know this probably does not exist. My best idea so far is to go on old-maps.co.uk and inspect each site manually, looking for the closest map to 1968 and judging on a yes/no basis whether development has occurred since then. Can anyone recommend a better method for measuring urban development since the 1960s?
I prefer you delineate your site from landsat images based on Year times let say map of 1960, 1980, which ever range you want and do image classification based on the different landcover layers you intend to. Thanks
Please visit the website of USGS u will find your data free of charch
regards
Sure, USGS is the best site to find landsat images for land cover trends, have used the same and it worked
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