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Crop Agriculture

Free Courses (Follow to Use Free GIS Software & Satellite Imagery)

About Free Courses

Featured Course: 3A) - Fundamentals of Remote Sensing of Crops; Includes Steps to Acquire & Use FREE Satellite Imagery for Crops/Vegetation in FREE GIS Software

NO EXPERIENCE NECESSARY. The courses guide you step-by-step through the process of downloading and installing free QGIS software, as well as free satellite imagery, then progress to converting the imagery to surface reflectance and analyzing imagery. QGIS is the recommended free GIS software because it is quite capable and user-friendly. If you have other GIS software, such as ArcGIS, you can follow along with the concepts (however, the Landsat 8 Surface Reflectance Tutorial and Sentinel-2 Surface Reflectance Tutorial are designed for ArcGIS).

Courses are to be added on an ongoing basis in proper order. The goal of the courses is to make users proficient (at no cost and on their own schedule) applying free GIS software and data (including imagery, elevation data & more). The About Courses page has more background information.

1) Downloading and Installing Free GIS Software & Downloading Imagery.

A) Downloading and Installing Free QGIS software (Go to QGIS User Manual on this Website)

B) Downloading Free Landsat 8 & Sentinel-2 Imagery from this Website and Opening in QGIS

C) Downloading Free High-Resolution Imagery from The National Map (USA) for a Base Layer in GIS (You can add base map imagery in QGIS through the "Open Layers" plugin if you have a sufficient internet speed, bypassing the need to download imagery).

D) Downloading Landsat 8 and Sentinel-2 from GloVIS Next and Opening in QGIS (nearly world coverage)

 

2) Processing Imagery in QGIS / Atmospheric Correction (converting to surface reflectance).

A) Converting Landsat 8 Imagery to Surface Reflectance in QGIS; necessary to calculate indices, such as NDVI, MSAVI2, and NDWI (Landsat 8 SR Tutorial is customized for ArcGIS users).

B) Converting Sentinel-2 Imagery to Surface Reflectance in QGIS; necessary to calculate indices, such as NDVI, MSAVI2, and NDWI (Sentinel-2 SR Tutorial is customized for ArcGIS users).

C) Calculating Spectral Indices from Satellite Imagery; WDRI, NDVI (plant biomass and vigor), Red-Edge Ratio (grass chlorophyll and nitrogen content), NDWI (for plant water content), dNBR (burn area mapping), NDSI (snow mapping). It is important to complete Course 3A if applying imagery to vegetation.

D) Extracting Imagery or Elevation Data to the Extent of a Field (or other area of interest).

 

3) Crop Condition Analysis and Yield Prediction with Free Software and Imagery. 

A) - Fundamentals of Remote Sensing of Crops; Includes Steps to Acquire & Use FREE Satellite Imagery for Crops/Vegetation in FREE GIS Software

 

4) Click Here for Wildfire Mapping Information. Click Here for Snow Mapping Information. Contact us or search independently for other mapping topics.

 

5) Downloading and Using LiDAR-Based Elevation Rasters.

Course to be included, for now contact us if you have a question about downloading elevation data.