Multispectral Landsat

This layer includes Landsat GLS, Landsat 8, and Landsat 9 imagery for use in visualization and analysis. This layer is time enabled and includes a number band combinations and indices rendered on demand. The Landsat 8 and 9 imagery includes nine multispectral bands from the Operational Land Imager (OLI) and two bands from the Thermal Infrared Sensor (TIRS). It is updated daily with new imagery directly sourced from the [USGS Landsat] collection on AWS. Geographic Coverage * Global Land Surface. * Polar regions are available in polar-projected Imagery Layers: [Landsat Arctic Views] and [Landsat Antarctic Views]. Temporal Coverage * This layer is updated daily with new imagery. * Working in tandem, Landsat 8 and 9 revisit each point on Earth's land surface every 8 days. * Most images collected from January 2015 to present are included. * Approximately 5 images for each path/row from 2013 and 2014 are also included. * This layer also includes imagery from the Global Land Survey* (circa 2010, 2005, 2000, 1990, 1975). Product Level * The Landsat 8 and 9 imagery in this layer is comprised of Collection 2 Level-1 data. * The imagery has Top of Atmosphere (TOA) correction applied. * TOA is applied using the radiometric rescaling coefficients provided the USGS. * The TOA reflectance values (ranging 0 – 1 by default) are scaled using a range of 0 – 10,000. Image Selection/Filtering * A number of fields are available for filtering, including Acquisition Date, Estimated Cloud Cover, and Product ID. * To isolate and work with specific images, either use the ‘Image Filter’ to create custom layers or add a ‘Layer Filter’ to restrict the default layer display to a specified image or group of images. * To isolate a specific mission, use the Layer Filter and the dataset_id or SensorName fields. Visual Rendering * The default rendering in this layer is Agriculture (bands 6,5,2) with Dynamic Range Adjustment (DRA). Brighter green indicates more vigorous vegetation. * The DRA version of each layer enables visualization of the full dynamic range of the images. * Rendering (or display) of band combinations and calculated indices is done on-the-fly from the source images via Raster Functions. * Various pre-defined Raster Functions can be selected or custom functions can be created. * Pre-defined functions: [Natural Color with DRA], [Agriculture with DRA], [Geology with DRA], [Color Infrared with DRA], [Bathymetric with DRA], [Short-wave Infrared with DRA], [Normalized Difference Moisture Index Colorized], [NDVI Raw], [NDVI Colorized], [NBR Raw] * 15 meter Landsat Imagery Layers are also available: [Panchromatic] and [Pansharpened]. Multispectral Bands ────┬──────────────────────────────────────┬───────────────┬────────────────────── Band│Description │Wavelength (µm)│Spatial Resolution (m) ────┼──────────────────────────────────────┼───────────────┼────────────────────── 1 │Coastal aerosol │0.43 - 0.45 │30 ────┼──────────────────────────────────────┼───────────────┼────────────────────── 2 │Blue │0.45 - 0.51 │30 ────┼──────────────────────────────────────┼───────────────┼────────────────────── 3 │Green │0.53 - 0.59 │30 ────┼──────────────────────────────────────┼───────────────┼────────────────────── 4 │Red │0.64 - 0.67 │30 ────┼──────────────────────────────────────┼───────────────┼────────────────────── 5 │Near Infrared (NIR) │0.85 - 0.88 │30 ────┼──────────────────────────────────────┼───────────────┼────────────────────── 6 │SWIR 1 │1.57 - 1.65 │30 ────┼──────────────────────────────────────┼───────────────┼────────────────────── 7 │SWIR 2 │2.11 - 2.29 │30 ────┼──────────────────────────────────────┼───────────────┼────────────────────── 8 │Cirrus (in OLI this is band 9) │1.36 - 1.38 │30 ────┼──────────────────────────────────────┼───────────────┼────────────────────── 9 │QA Band (available with Collection 1)*│NA │30 ────┴──────────────────────────────────────┴───────────────┴────────────────────── *More about the [Quality Assessment Band] TIRS Bands ────┬───────────┬───────────────┬────────────────────── Band│Description│Wavelength (µm)│Spatial Resolution (m) ────┼───────────┼───────────────┼────────────────────── 10 │TIRS1 │10.60 - 11.19 │100 * (30) ────┼───────────┼───────────────┼────────────────────── 11 │TIRS2 │11.50 - 12.51 │100 * (30) ────┴───────────┴───────────────┴────────────────────── *TIRS bands are acquired at 100 meter resolution, but are resampled to 30 meter in delivered data product. Additional Usage Notes * Image exports are limited to 4,000 columns x 4,000 rows per request. * This dynamic imagery layer can be used in Web Maps and ArcGIS Pro as well as web and mobile applications using the ArcGIS REST APIs. * WCS and WMS compatibility means this imagery layer can be consumed as WCS or WMS services. * The [Landsat Explorer App] is another way to access and explore the imagery. Data Source Landsat imagery is sourced from the U.S. Geological Survey (USGS) and the National Aeronautics and Space Administration (NASA). Data is hosted in Amazon Web Services as part of their [Public Data Sets program]. For information, see [Landsat 8 ] and [Landsat 9]. *The Global Land Survey includes images from Landsat 1 through Landsat 7. Band numbers and band combinations differ from those of Landsat 8, but have been mapped to the most appropriate band as in the above table. For more information about the Global Land Survey, visit [GLS].