I am looking to access satellite/aerial imagery for twenty sites in SE England taken during the month of April 2017 at a scale of 1:120,000 or higher. This is to identify fields in which oilseed rape is being grown. Is there a way of accessing this kind of information? Thanks in advance.
http://gisgeography.com/free-satellite-imagery-data-list/
or if you have the ArcGIS licence, you can visulize it adding a base map.
For the purpose you mentioned, I strongly recommend you to try Sentinel 2 Multispectral imagery. See for example
Immitzer (2016) First experience with sentinel-2 data for crop and tree species classification in central Europe. Remote sensing 2016 (8):166
DOI 10.3390/rs8030166
Hi Elizabeth,
try earth explorer system from NASA and USGS . There you will find several kinds of satellite data.
Hello, you can browse these 20 sites for image downloads: http://monde-geospatial.com/20-free-satellite-imagery-data-sources/1/.
Ash, there are 20+ Landsat 8 satellite images covering SE England for the month of April 2017. With Sentinel 2 satellites there are 100+ images covering parts of the region in the same time period. These satellite images have map scales as good as 1:60000 (30 m) and 1:20000 (10 m). Both satellites have vegetation sensitive wavelength bands which can be used for calculating various vegetation indices such as Normalized Difference Vegetation Index (NDVI). Most of all NASA, USGS and ESA are providing these data for free. You can access these datasets from https://earthexplorer.usgs.gov/ and https://cophub.copernicus.eu/
Now Sentinel 2 ESA satellite is freely available and ASTER datasets are now also free of cost.
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