GIS/RS
at 4M-Analytics
Whoaaaaa . . . here's NDVI change 2008-2014 at Highgate, #VT - using what I think is @HarelDan's composite method. cc @TheMapSmithpic.twitter.com/qcHSERNEgZ
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Absolutely! http://apps.sentinel-hub.com/sentinel-playground-temporal/?baseWmsUrl=services.sentinel-hub.com&instanceID=7bd7e1c0-4574-45b3-9d73-4f320e1c2e4f&source=S2&lat=30.614942215265618&lng=31.935195922851562&zoom=13&preset=CUSTOM&layers=B04,B03,B02&maxcc=20&gain=1&gamma=1&temporal=true&time=2015-01-01|2017-08-31&cloudCorrection=none&atmFilter=&showDates=false&evalscript=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%2BPShpbnB1dE1ldGFkYXRhLnRvLmdldFRpbWUoKS0zKjMxKjI0KjM2MDAqMTAwMCkgOwogICAgfSk7Cn0K …pic.twitter.com/nJRd8swrwA
Tip: Blue field growing, Green fields maturing, Yellow Fields ripe, Red fields reaped/drying. Same place, 3 days ago http://apps.sentinel-hub.com/sentinel-playground-temporal/?baseWmsUrl=services.sentinel-hub.com&instanceID=7bd7e1c0-4574-45b3-9d73-4f320e1c2e4f&source=S2&lat=30.614942215265618&lng=31.935195922851562&zoom=13&preset=CUSTOM&layers=B04,B03,B02&maxcc=20&gain=1&gamma=1&temporal=true&time=2015-01-01|2017-10-21&cloudCorrection=none&atmFilter=&showDates=false&evalscript=ZnVuY3Rpb24gICAgc2V0dXAgKGRzcykgewogIHNldElucHV0Q29tcG9uZW50cyhbZHNzLkIwNCxkc3MuQjA4XSk7CiAgc2V0T3V0cHV0Q29tcG9uZW50Q291bnQoMyk7Cn0KCmZ1bmN0aW9uIGNhbGNORFZJKHNhbXBsZSkgewogIHZhciBkZW5vbSA9IHNhbXBsZS5CMDQrc2FtcGxlLkIwODsKICByZXR1cm4gKChkZW5vbSE9MCkgPyAoc2FtcGxlLkIwOC1zYW1wbGUuQjA0KSAvIGRlbm9tIDogMC4wKTsKfQpmdW5jdGlvbiAgc3RyZXRjaCh2YWwsIG1pbiwgbWF4KSAgewogcmV0dXJuICh2YWwtbWluKS8obWF4LW1pbik7Cn0KCmZ1bmN0aW9uIGV2YWwoc2FtcGxlcyxzY2VuZXMpIHsgIAogIHZhciBhdmcxID0gMDsKICB2YXIgY291bnQxID0gMDsKICB2YXIgYXZnMiA9IDA7CiAgdmFyIGNvdW50MiA9IDA7CiAgdmFyIGF2ZzMgPSAwOwogIHZhciBjb3VudDMgPSAwOwogIHZhciBlbmRNb250aCA9IHNjZW5lc1swXS5kYXRlLmdldE1vbnRoKCk7CiAgCiAgZm9yICh2YXIgaT0wO2k8c2FtcGxlcy5sZW5ndGg7aSsrKSB7CiAgICAgIHZhciBuZHZpID0gY2FsY05EVkkoc2FtcGxlc1tpXSk7CiAgICAgIGlmIChzY2VuZXNbaV0uZGF0ZS5nZXRNb250aCgpPT1lbmRNb250aCkKICAgICAgewoJCWF2ZzMgPSBhdmczICsgbmR2aTsKICAgICAgICBjb3VudDMrKzsKICAgICAgfQogICAgICBlbHNlIGlmIChzY2VuZXNbaV0uZGF0ZS5nZXRNb250aCgpPT0oZW5kTW9udGgtMSkpCiAgICAgIHsKCQlhdmcyID0gYXZnMiArIG5kdmk7CiAgICAgICAgY291bnQyKys7CiAgICAgIH0KICAgICAgZWxzZQogICAgICB7ICAgICAgCgkJYXZnMT0gYXZnMSArIG5kdmk7CiAgICAgICAgY291bnQxKys7CiAgICAgIH0KICAgICAgCiAgfQogIGF2ZzEgPSBhdmcxL2NvdW50MTsKICBhdmcyID0gYXZnMi9jb3VudDI7CiAgYXZnMyA9IGF2ZzMvY291bnQzOwogIGF2ZzEgPSBzdHJldGNoKGF2ZzEsIDAuMSwgMC43KTsKICBhdmcyID0gc3RyZXRjaChhdmcyLCAwLjEsIDAuNyk7CiAgYXZnMyA9IHN0cmV0Y2goYXZnMywgMC4xLCAwLjcpOwogIAogIHJldHVybiBbYXZnMSxhdmcyLGF2ZzNdOwoKCn0KZnVuY3Rpb24gZmlsdGVyU2NlbmVzIChzY2VuZXMsIGlucHV0TWV0YWRhdGEpIHsKICAgIHJldHVybiBzY2VuZXMuZmlsdGVyKGZ1bmN0aW9uIChzY2VuZSkgewoJICByZXR1cm4gc2NlbmUuZGF0ZS5nZXRUaW1lKCk%2BPShpbnB1dE1ldGFkYXRhLnRvLmdldFRpbWUoKS0zKjMxKjI0KjM2MDAqMTAwMCkgOwogICAgfSk7Cn0K …pic.twitter.com/cfEuxcwKGO
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Would that be different for different crops? And do you adjust the used time span of comparison if you know the crop?
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Yes, crop type as well as climate will undoubtedly change the color scheme. It works best for grains in semi-arid regions.
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Wow! The moment even my mom can classify petabytes in seconds on her very old computer is getting closer. Just need to teach her Javascript
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90's - Grandmas can use a PC. 00's - Grandmas can use the internet. 10's - Grandmas can perform complex remote sensing analyses.
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These are fascinating! Can I clarify: These are NDVI composites ? Where in your
@sentinel_hub script (or process) do you set the dates? ThxThanks. Twitter will use this to make your timeline better. UndoUndo
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Ok, how did you do it?
Thanks. Twitter will use this to make your timeline better. UndoUndo
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