Landsat GLS Pansharpened

This layer includes Landsat GLS pansharpened imagery rendered on-the-fly as Natural Color with DRA for use in visualization and analysis. This layer is time enabled and includes a number of pansharpened renderings on demand. The layer includes 30m natural color Landsat 7 ETM+, Landsat 5 TM, and Landsat 4 imagery, enhanced with 15m panchromatic imagery. Geographic Coverage * World-wide imagery coverage. Temporal Coverage * This imagery layer includes data from epochs 2010, 2005 and 2000. Analysis Ready * This imagery layer is analysis ready with Top of Atmosphere (TOA) correction applied. * The TOA reflectance values (ranging 0 – 1 by default) are scaled using a range of 0 – 10,000. * The scale is equivalent to other TOA reflectance products, including those provided by the USGS. Image Selection/Filtering * Newer images are displayed by default on top. * The entire archive is accessible via custom filtering. * A number of fields are available for filtering, including Acquisition Date, Estimated Cloud Cover, and Product ID. * By setting the filter to Best is lesser than QQQQ one can control to see the best N scenes, where QQQQ=N*1million. NOTE: Turning off all filters, and loading the entire archive, may affect performance. Visual Rendering * Default layer is Pansharpened Enhanced with Dynamic Range Adjustment (DRA), which is a band combination (original bands 4,3,2) that displays natural colors. * 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. Other Layer Usage Notes... * Overviews exist with a spatial resolution of 300m and are updated weekly based on the best and latest imagery available at that time. * To work with individual source images at all scales, either use the ‘Lock Raster’ functionality or add a query filter to restrict the display to a specified image or group of images. * NOTE: ‘Lock Raster’ should only be used on the layer for short periods of time, as the imagery and associated record Object IDs may change daily. * Images can be exported up to a maximum of 2,000 columns x 2,000 rows per request. * This ArcGIS Server dynamic Imagery Layer can be used in Web Maps and ArcGIS Desktop as well as Web and Mobile applications using the REST based Image Services API. * WCS and WMS compatibility means this imagery can be consumed as WCS or WMS services. * Landsat Web App via [Unlock Earth's Secrets]. Data Source Landsat imagery is sourced from the U.S. Geological Survey (USGS) and the National Aeronautics and Space Administration (NASA). Data is hosted by the Amazon Web Services as part of their [Public Data Sets program]. Users can access full scenes from [Landsat on AWS], or alternatively access [LandsatLook] to review and download full scenes from the complete USGS archive. 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].