Dynamique des superficies cultivées

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yacouba_diarra
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Acquisition et traitement de donnée

by yacouba_diarra » Tue Sep 20, 2022 1:09 pm America/New_York

J'aimerais savoir le type de landsat pour délimiter les bassins versants et le traitement. La carte d'occupation du sol. Inventaire des espaces agricoles.
Merci!

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LP DAAC - dgolon
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Re: Acquisition et traitement de donnée

by LP DAAC - dgolon » Tue Oct 04, 2022 4:55 pm America/New_York

Hello @yacouba_diarra I spoke with the Landsat team and they recommended you search google scholar for papers on how to delineate watersheds and treatment using Landsat data. They found quite a few there. As far as the 'type' of Landsat data - any sensor would work, it's the bands and RGB combinations you'll need to research. They recommended reading: https://www.usgs.gov/faqs/what-are-band-designations-landsat-satellites and said L8 and L9 have a coastal/aerosol band that may be useful.

For "Land Cover Map" and "Inventory of Agricultural Areas" that will depend on your area of interest. They recommended you search those terms with your county or region of interest. For users interested in data over the United States they recommended: https://www.usgs.gov/centers/eros/science/national-land-cover-database, or https://www.usgs.gov/special-topics/lcmap for Land Cover Maps and https://www.nass.usda.gov/AgCensus/ for an inventory of agricultural areas. Depending on your time frame of interest and spatial scale, you might also be interested in the various data products the LP DAAC has to offer. For cropland data please visit: https://lpdaac.usgs.gov/product_search/?keyword=Cropland&status=Operational&view=cards&sort=title for Land Cover Map please visit: https://lpdaac.usgs.gov/product_search/?keyword=Cropland&status=Operational&view=cards&sort=title

Thanks,
Danielle
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yacouba_diarra
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Re: Acquisition et traitement de donnée

by yacouba_diarra » Wed Oct 05, 2022 5:40 pm America/New_York

Merci d'avoir me répondre! C'est très gentil de ta part!

yacouba_diarra
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Dynamique des superficies cultivées

by yacouba_diarra » Thu Oct 06, 2022 5:17 am America/New_York

Bonjour!
J'aimerais avoir des information sur cette thématique.
"Dynamique des superficies cultivées entre 1990 et 2022 dans la commune rurale de Tioribougou".
Je souhaite voir au niveau de la légende: (Terre cultivée, sol nu, Habitat et si possible les zones humides).
Quels sont les types d'images satellitales convenable (Landsat, Sentinelle1,2, TM etc...?
Quelle est période la plus bonne à choisir lors du téléchargement des bandes?
Doit-on faire quel composition colorée pour mieux voir ces entités géographiques?
Merci bien!

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