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EOS Land Viewer Provides Up-To-Date Images Of Farm Fields

EOS Land Viewer is a user-friendly online tool that equips you with up-to-date images of farm fields from Sentinel-2, Landsat 8, Landsat 7, Terra/Aqua operative satellites as well as Landsat 4 and Landsat 5 archive images. 

You can get data on a regional (full scenes with a total area up to 1,200 km) as well as a local level (individual farms and field groups) anywhere in the world. 

Users can retrieve images directly from the web access interface or through the WMS interface in existing GIS packages. The second option allows you to use satellite images as a raster base map in your applications.

EOS Land Viewer provides a variety of multi-temporal satellite imagery and products that can be used in the following tasks.

Phenological observations

Users can observe the state of crops during major phenophases. The coordinates of target areas are permanently stored in the My AOI list, and users can quickly return to a specific location.

Each band of a multispectral image contains individual information about properties of an underlying surface. For example, the maximum absorption of solar radiation by the chlorophyll is in the red range of electromagnetic spectrum. Data in the near infrared range is sensitive to a moisture content in soils and vegetation. Blue range data can be used for soil and vegetation differentiation. Different combinations of satellite image bands highlight areas with various photosynthetic activity (i.e. dense, rarefied, and damaged vegetation, etc). 

The Band Combination tool allows you to visualize images in the different band syntheses, emphasize the location of agricultural land, analyze its structure, identify areas of healthy and damaged vegetation, and build maps of fields heterogeneity.

Monitoring

The repeat interval of satellite imagery varies from one day to 16 days. EOS Land Viewer data allows you to build a regular time series of satellite images and calculate vegetation indices on their basis.

Vegetation indices (VI) are quantitative indicators of the amount of photosynthetically active biomass. The EOS Land Viewer provides tools to calculate the Normalized Difference Vegetation Index (NDVI), Normalized Difference Water Index (NDWI), Normalized Difference Snow Index (NDSI), as well as a tool for custom VI calculating.

Pseudo-colored maps of VI allow users to detect areas of healthy and damaged vegetation in order to identify arid, waterlogged, and saline territories. The Comparison Slider tool is used to build different-time maps of VI, which provide continuous monitoring of a crop’s development during the growing season and help detect changes quickly.

Rapid Response

Satellite survey data is a mean of identifying crop damages, which are a result of hurricanes, floods, droughts, fires, or technology issues. EOS Land Viewer allows you to view damaged fields and calculate how extensive the damage is in that area.

Satellite images provided via the EOS Land Viewer web interface can be used as input data to detect agricultural land boundaries, classify crops, forecast yields, and control the targeted use of ag lands. 

To learn more, visit eos.com/agriculture/.

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