GEE Tutorials

Mapping Center-pivot Irrigation using Google Earth Engine

Over 22 million hectares (ha) of U.S. croplands are irrigated. Irrigation is an intensified agricultural land use that increases crop yields and the practice affects water and energy cycles at, above, and below the land surface. Until recently, there has been a scarcity of geospatially detailed information about irrigation that is comprehensive, consistent, and timely …

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NLCD: USGS National Land Cover Database in Google Earth Engine

NLCD is the National Land Cover Database produced, managed, and distributed by Earth Resources Observation and Science (EROS) Center, Sioux Falls in cooperation with the Multi-Resolution Land Characteristics Consortium (MRLC). These land cover product are for all 50 states and Puerto Rico. These are available for the following years: 2001, 2003, 2006, 2008, 2011, 2013, 2016, …

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Calculate NDVI for a Single Month over 36 years (1985-2019)

The Normalized Difference Vegetation Index (NDVI) is a simple graphical indicator that can be used to analyze remote sensing measurements, typically, but not necessarily, from a space platform, and assess whether the target being observed contains live green vegetation or not. The NDVI is calculated from these individual measurements as follows: NDVI= (NIR-Red) \ (NIR+Red) In this tutorial, we will …

Calculate NDVI for a Single Month over 36 years (1985-2019) Read More »

Use Reducer to Observe the difference between weighted and unweighted mean of the NDVI image clipped to the region.

The Normalized Difference Vegetation Index (NDVI) is a simple graphical indicator that can be used to analyze remote sensing measurements, typically, but not necessarily, from a space platform, and assess whether the target being observed contains live green vegetation or not. The NDVI is calculated from these individual measurements as follows: NDVI= (NIR-Red) \ (NIR+Red) The following code is available …

Use Reducer to Observe the difference between weighted and unweighted mean of the NDVI image clipped to the region. Read More »

Use Normalized Difference Vegetation Index (NDVI) to Determine Bare-Land

The Normalized Difference Vegetation Index (NDVI) is a simple graphical indicator that can be used to analyze remote sensing measurements, typically, but not necessarily, from a space platform, and assess whether the target being observed contains live green vegetation or not. The NDVI is calculated from these individual measurements as follows: NDVI= (NIR-Red) \ (NIR+Red) The following code is available …

Use Normalized Difference Vegetation Index (NDVI) to Determine Bare-Land Read More »

Create a chart of NDVI over time using Widgets

The Normalized Difference Vegetation Index (NDVI) is a simple graphical indicator that can be used to analyze remote sensing measurements, typically, but not necessarily, from a space platform, and assess whether the target being observed contains live green vegetation or not. The NDVI is calculated from these individual measurements as follows: NDVI= (NIR-Red) \ (NIR+Red) The following code is available …

Create a chart of NDVI over time using Widgets Read More »

Create a Time-series to Display NDVI Mean Day of Year for Multiple Years using MODIS Data

The Normalized Difference Vegetation Index (NDVI) is a simple graphical indicator that can be used to analyze remote sensing measurements, typically, but not necessarily, from a space platform, and assess whether the target being observed contains live green vegetation or not. The NDVI is calculated from these individual measurements as follows: NDVI= (NIR-Red) \ (NIR+Red) In this tutorial we will …

Create a Time-series to Display NDVI Mean Day of Year for Multiple Years using MODIS Data Read More »

Create a Time-series to Display NDVI Values in Different Regions Across Images

The Normalized Difference Vegetation Index (NDVI) is a simple graphical indicator that can be used to analyze remote sensing measurements, typically, but not necessarily, from a space platform, and assess whether the target being observed contains live green vegetation or not. The NDVI is calculated from these individual measurements as follows: NDVI= (NIR-Red) \ (NIR+Red) In this tutorial we will …

Create a Time-series to Display NDVI Values in Different Regions Across Images Read More »

Develop an App to Calculate Mean NDVI at Any Point.

The Normalized Difference Vegetation Index (NDVI) is a simple graphical indicator that can be used to analyze remote sensing measurements, typically, but not necessarily, from a space platform, and assess whether the target being observed contains live green vegetation or not. The NDVI is calculated from these individual measurements as follows: NDVI= (NIR-Red) \ (NIR+Red) In this tutorial we will …

Develop an App to Calculate Mean NDVI at Any Point. Read More »