{"id":630,"date":"2024-03-19T16:52:21","date_gmt":"2024-03-19T16:52:21","guid":{"rendered":"https:\/\/ubwp.buffalo.edu\/glyremotesensinglab\/?p=630"},"modified":"2024-03-19T17:33:18","modified_gmt":"2024-03-19T17:33:18","slug":"dem-generation-from-airborne-lidar-data-mcmurdo-dry-valleys-antarctica","status":"publish","type":"post","link":"https:\/\/ubwp.buffalo.edu\/glyremotesensinglab\/2024\/03\/19\/dem-generation-from-airborne-lidar-data-mcmurdo-dry-valleys-antarctica\/","title":{"rendered":"DEM generation from airborne LIDAR data, McMurdo Dry Valleys, Antarctica"},"content":{"rendered":"\n<p>The McMurdo Dry Valleys, covering about 4,800 km\u00b2, at 76\u00b030&#8217;78\u00b030&#8217;S, 160-164\u00b0E, constitute the largest continuous ice-free ground in Antarctica. It is a hyper-arid, cold polar desert, containing a variety of landscapes, including perennially ice-covered lakes, ephemeral streams, glaciers, and extensive areas of soils and exposed bedrock. Geomorphologic mapping and landscape interpretation provide key information toward understanding the climate evolution of the Dry Valley region, which has important implications for the stability of the east Antarctic ice sheet. (see<a href=\"https:\/\/ubwp.buffalo.edu\/glyremotesensinglab\/wp-content\/uploads\/sites\/201\/2024\/03\/Sitemap.jpg\" target=\"_blank\" rel=\"noreferrer noopener\">&nbsp;site map&nbsp;<\/a>for orientation).<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" width=\"170\" height=\"127\" src=\"https:\/\/ubwp.buffalo.edu\/glyremotesensinglab\/wp-content\/uploads\/sites\/201\/2024\/02\/Bild1_small.jpg\" alt=\"Beacon Valley\" class=\"wp-image-631\" style=\"width:258px;height:auto\" \/><figcaption class=\"wp-element-caption\">Beacon Valley<\/figcaption><\/figure><\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img decoding=\"async\" width=\"170\" height=\"115\" src=\"https:\/\/ubwp.buffalo.edu\/glyremotesensinglab\/wp-content\/uploads\/sites\/201\/2024\/03\/Bild2_small.jpg\" alt=\"Mount Erebus\" class=\"wp-image-633\" style=\"width:260px;height:auto\" \/><figcaption class=\"wp-element-caption\">Looking east across Eastern Taylor Valley, in the background you can see Mount Erebus<\/figcaption><\/figure><\/div>\n\n\n<p>During the 2001-02 Austral summer,\u00a0<a href=\"http:\/\/www.nasa.gov\/centers\/goddard\/home\/index.html\" target=\"_blank\" rel=\"noreferrer noopener\">NASA\/GSFC<\/a>,\u00a0<a href=\"http:\/\/www.nsf.gov\/dir\/index.jsp?org=OPP\" target=\"_blank\" rel=\"noreferrer noopener\">NSF Polar Program<\/a>,\u00a0and\u00a0<a href=\"http:\/\/www.usgs.gov\/\" target=\"_blank\" rel=\"noreferrer noopener\">USGS<\/a>\u00a0joined forces to collect high-resolution ALS data over several sites in the McMurdo Dry Valleys area of southern Victoria Land, Antarctica, using NASA\u2019s Airborne Topographic Mapper (ATM) laser altimetry system. The prime motivation was to evaluate the potential of ALS topographic mapping in Antarctica and to establish calibration\/validation sites for NASA\u2019s ICESat (Ice, Cloud, and land Elevation Satellite) altimeter mission. Data were collected and processed by\u00a0<a href=\"http:\/\/aol.wff.nasa.gov\/aoltm.html\" target=\"_blank\" rel=\"noreferrer noopener\">NASA\u2019s ATM group<\/a>. The second data processing phase, called as laser point post-processing, was carried out at the Ohio State University.<br>Researchers from the Byrd Polar Research Center and the Digital Photogrammetry Laboratory developed unique methods to analyze the raw laser points, to detect and eliminate outliers, and to interpolate a Digital Elevation Model (DEM) from the irregularly distributed laser points. Different visualization methods are used to represent the surface in a suitable fashion for researchers to analyze the different landscapes. For example, presenting the topography as shaded relief perspective view reveals how well the topographic details have been captured by the airborne laser scanning mission and encoded in the DEM (<a href=\"https:\/\/ubwp.buffalo.edu\/glyremotesensinglab\/wp-content\/uploads\/sites\/201\/2024\/03\/fig1b.jpg\">Canada glacier<\/a>). This website showcases a few geomorphologic applications that greatly benefit from the high-resolution topographic data. The full data set (that includes the DEMs, label files, and original laser points) is distributed by USGS through the\u00a0<a href=\"http:\/\/usarc.usgs.gov\/lidar_dload.shtml\" target=\"_blank\" rel=\"noreferrer noopener\">Antarctic Digital Atlas<\/a>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"482\" height=\"198\" src=\"https:\/\/ubwp.buffalo.edu\/glyremotesensinglab\/wp-content\/uploads\/sites\/201\/2024\/03\/fig1b.jpg\" alt=\"fig1b\" class=\"wp-image-649\" srcset=\"https:\/\/ubwp.buffalo.edu\/glyremotesensinglab\/wp-content\/uploads\/sites\/201\/2024\/03\/fig1b.jpg 482w, https:\/\/ubwp.buffalo.edu\/glyremotesensinglab\/wp-content\/uploads\/sites\/201\/2024\/03\/fig1b-300x123.jpg 300w\" sizes=\"(max-width: 482px) 100vw, 482px\" \/><\/figure><\/div>\n\n\n<p class=\"has-background\" style=\"background:linear-gradient(135deg,rgb(247,242,255) 0%,rgb(232,240,255) 100%)\">Download the DEM of Taylor valley data 1\u00a0<a href=\"http:\/\/rsl.geology.buffalo.edu\/data\/ICESAT-II\/taylorlower.tif\" target=\"_blank\" rel=\"noreferrer noopener\">here<\/a><br>Download the DEM of Taylor valley data 2\u00a0<a href=\"http:\/\/rsl.geology.buffalo.edu\/data\/ICESAT-II\/taylor_icefall_mask.tif\" target=\"_blank\" rel=\"noreferrer noopener\">here<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The McMurdo Dry Valleys, covering about 4,800 km\u00b2, at 76\u00b030&#8217;78\u00b030&#8217;S, 160-164\u00b0E, constitute the largest continuous ice-free ground in Antarctica. It is a hyper-arid, cold polar desert, containing a variety of &#8230; <a title=\"DEM generation from airborne LIDAR data, McMurdo Dry Valleys, Antarctica\" class=\"read-more\" href=\"https:\/\/ubwp.buffalo.edu\/glyremotesensinglab\/2024\/03\/19\/dem-generation-from-airborne-lidar-data-mcmurdo-dry-valleys-antarctica\/\" aria-label=\"Read more about DEM generation from airborne LIDAR data, McMurdo Dry Valleys, Antarctica\">Read more<\/a><\/p>\n","protected":false},"author":580,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[12],"class_list":["post-630","post","type-post","status-publish","format-standard","hentry","category-research","tag-data"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DEM generation from airborne LIDAR data, McMurdo Dry Valleys, Antarctica - Remote Sensing Lab<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ubwp.buffalo.edu\/glyremotesensinglab\/2024\/03\/19\/dem-generation-from-airborne-lidar-data-mcmurdo-dry-valleys-antarctica\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DEM generation from airborne LIDAR data, McMurdo Dry Valleys, Antarctica - Remote Sensing Lab\" \/>\n<meta property=\"og:description\" content=\"The McMurdo Dry Valleys, covering about 4,800 km\u00b2, at 76\u00b030&#8217;78\u00b030&#8217;S, 160-164\u00b0E, constitute the largest continuous ice-free ground in Antarctica. It is a hyper-arid, cold polar desert, containing a variety of ... 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