Sentinel 2 Imagery from USGS

• Getting data
  • If you are going to download data, create an account and log in before searching
  • If you know where you want the data, look at the 1:100K MGRS squares to find the ones you want, and filter for just that tile.
  • If a scene does not fully cover the 1:100K square, much of the square can be missing, so check the completeness before downloading
  • From earthexplorer web site  and directions
    • Additional criteria lets you specify the tile (e.g. T53HPA, include the leading "T")
    • Preview image from dowload shows how much coverage there is in the tile
    • Two choices
      •  L1C tile in JPEG2000 format, with all the bands (about 1 GB per tile, and double that after uncompressing and turning the JPEG2000 files into Geotiffs)
      •  Full scene Geotiff browse image (no ability to change the bands or contrast), but < 10 MB
  • From USGS Landsat Look. 
    • This is not the recommended download site
    • You want to get the Sentinel-2 Look Product and not the standard product.
  • Unzip and place images in a directory. 
  • Work around for early Sentinel-2 images with really long path names (2016 files, available from USGS in 2020; I have not seen this issue recently) which Windows will not extract
    • If  you get a "Path too long message"  when using Windows to unzip
    • Place the zip somewhere with a very short path  (like c:\mapdata\aa)
    • Do not use the Windows extract, but use that in MICRODEM under File, Tools
  • If the program does not recognize a Sentinel-2 image, put the data in a directory with the word "SENTINEL" somewhere in the path.
  • Insure you have GDAL to convert the JPEG2000 files
  • If you have a lot of scenes, you can do a batch conversion and take a walk while they process.  File, Tools, Sentinel 2 data prep.  Pick a directory, and all images in the first level of subdirectories  will be extracted.
• File, Open submenu, Open Landsat/Sentinel-2 multiband image: particularly good for Sentinel-2 which buries the image files many directories deep.  Will let you pick the high level directory, GDAL convert the bands from JP2 to Geotiff.   This will take some time for the conversion.

Working with Sentinel-2 in MICRODEM

• Two ways to use in MICRODEM so you can combine bands and do analysis.

Last revision 10/22/2021