{"id":121561,"date":"2011-05-10T15:00:00","date_gmt":"2011-05-10T15:00:00","guid":{"rendered":"http:\/\/www.esri.com\/arcgis-blog\/products\/product\/uncategorized\/landsat-image-services-now-available-on-arcgis-online\/"},"modified":"2011-05-10T15:00:00","modified_gmt":"2011-05-10T15:00:00","slug":"landsat-image-services-now-available-on-arcgis-online","status":"publish","type":"blog","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/imagery\/imagery\/landsat-image-services-now-available-on-arcgis-online","title":{"rendered":"Landsat image services now available on ArcGIS Online"},"author":4961,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_searchwp_excluded":""},"categories":[22931,22941],"tags":[38721,38281,23211],"industry":[],"product":[36551],"class_list":["post-121561","blog","type-blog","status-publish","format-standard","hentry","category-imagery","category-mapping","tag-available","tag-general-information","tag-map-data","product-arcgis-online"],"acf":{"short_description":"By Natalie Feuerstein, Esri Cartographic Product Engineer\n\n\n\nLandsat data are multi-band moderate resolution satellite images of the Eart...","flexible_content":[{"acf_fc_layout":"content","content":"

By Natalie Feuerstein, Esri Cartographic Product Engineer<\/strong><\/p>\n

\"Image<\/p>\n

Landsat data<\/a> are multi-band moderate resolution satellite images of the Earth\u2019s surface that are often processed to enhance particular features through different band combinations. Scientists, academics, and remote sensing professionals have long used Landsat data to support global assessments of land cover, land cover change, and ecosystem dynamics, such as disturbance and vegetation health. Now, these data can be freely and easily accessed through ArcGIS Online<\/a> and used in ArcMap for your projects.<\/p>\n

<\/p>\n

The Landsat\u00a0archives date back to 1972. That’s more than 30 years of continuous global imagery coverage! To help increase exposure to and use of the data in these archives, the U.S. Geological Survey<\/a> (USGS) and the National Aeronautics and Space Administration<\/a> (NASA) came together to create a composition of Landsat data called the Global Land Survey<\/a> (GLS). The GLS data present the best-of-the-best images spanning almost four decades: GLS 2005, GLS 2000, GLS 1990, and GLS 1975.<\/p>\n

\"Image<\/p>\n

These data are not just “pretty pictures”. The Landsat image services<\/a> on ArcGIS Online provide dynamic access to all the spectral and temporal information in this massive collection of imagery. Landsat Image services do not rely on caching; instead, the imagery is delivered using on-the-fly processing which enables you to view different band combinations, different epochs of imagery, and\u00a0process multiple bands to derive new products.<\/p>\n

Landsat data are composed of seven different bands, each representing a different portion of the electromagnetic spectrum. Individual bands can be combined in a Red, Green, Blue (RGB) composite to highlight different properties of features in the image. Let’s take a look at some commonly used Landsat band combinations:<\/p>\n