{"id":252,"date":"2001-11-01T12:50:03","date_gmt":"2001-11-01T10:50:03","guid":{"rendered":"http:\/\/www.mpateraki.org\/?p=252"},"modified":"2015-01-21T13:01:32","modified_gmt":"2015-01-21T11:01:32","slug":"digital-surface-modelling-by-airborne-laser-scanning-and-digital-photogrammetry-for-glacier-monitoring","status":"publish","type":"post","link":"https:\/\/mpateraki.org\/?p=252","title":{"rendered":"Digital surface modelling by airborne laser scanning and digital photogrammetry for glacier monitoring"},"content":{"rendered":"<p>Baltsavias E.P., Favey E., Bauder A., Boesch H., <strong>Pateraki M.<\/strong>, 2001. Digital surface modelling by airborne laser scanning and digital photogrammetry for glacier monitoring. Invited paper at Annual General Meeting of the Photogrammetric Society, UK. In: Photogrammetric Record, 17(98): 243-273.\u00a0 [<a href=\"http:\/\/dx.doi.org\/10.1111\/0031-868X.00182\" target=\"_blank\">doi<\/a>] [<a href=\"http:\/\/www.mpateraki.org\/wp-content\/uploads\/2014\/11\/ucl.pdf\" target=\"_blank\">pdf<\/a>] [<a href=\"http:\/\/www.mpateraki.org\/wp-content\/uploads\/2015\/01\/baltsavias01.txt\" target=\"_blank\">bib<\/a>]<\/p>\n<p>Abstract:<\/p>\n<p>This research is part of a Swiss National Science Foundation project on \u201cMass Balance Determination\u00a0of Glaciers with the Use of State-of-the-art Remote Sensing Methods and a Numerical Flow Model\u201d. Remote\u00a0sensing involves automated processing of aerial images and laser scanning and aims at producing glacier\u00a0surface models with an accuracy of about 0\u00b75-1 m in time periods of 1-5 years. The Unteraar glacier,\u00a0Switzerland, has been chosen to test both methods, as it has been extensively studied by glaciologists. The\u00a0results of laser and digital photogrammetry were evaluated using accurate manual measurements at an\u00a0analytical plotter. Regarding laser data processing, different aspects like system description, position and\u00a0attitude determination, transformation to the Swiss map co-ordinate system, fit of overlapping laser strips\u00a0and problems encountered are presented. Three digital photogrammetric systems (Match-T, LHS DPW770\u00a0and VirtuoZo) were used for surface model generation using image matching. The different matching\u00a0algorithms and strategies, occurred matching problems due to low texture, shadows, steep slopes etc. and a\u00a0quantitative and qualitative evaluation of the results are presented. Finally, a comparison between\u00a0photogrammetry and laser scanning regarding accuracy and point density is presented.<\/p>\n<table align=\"center\">\n<tbody align=\"center\">\n<tr align=\"center\">\n<td align=\"center\" width=\"30%\"><a href=\"http:\/\/www.mpateraki.org\/wp-content\/uploads\/2015\/01\/glacier.jpg.bmp\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-257 \" src=\"http:\/\/www.mpateraki.org\/wp-content\/uploads\/2015\/01\/glacier.jpg.bmp\" alt=\"\" width=\"183\" height=\"269\" \/><\/a><\/td>\n<td align=\"center\" width=\"70%\"><a href=\"http:\/\/www.mpateraki.org\/wp-content\/uploads\/2015\/01\/dtm.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft wp-image-256 \" src=\"http:\/\/www.mpateraki.org\/wp-content\/uploads\/2015\/01\/dtm.jpg\" alt=\"\" width=\"495\" height=\"299\" srcset=\"https:\/\/mpateraki.org\/wp-content\/uploads\/2015\/01\/dtm.jpg 795w, https:\/\/mpateraki.org\/wp-content\/uploads\/2015\/01\/dtm-300x181.jpg 300w\" sizes=\"auto, (max-width: 495px) 100vw, 495px\" \/><\/a><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>Baltsavias E.P., Favey E., Bauder A., Boesch H., Pateraki M., 2001. Digital surface modelling by airborne laser scanning and digital photogrammetry for glacier monitoring. Invited paper at Annual General Meeting of the Photogrammetric Society, UK. In: Photogrammetric Record, 17(98): 243-273.\u00a0 [doi] [pdf] [bib] Abstract: This research is part of a Swiss National Science Foundation project [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":256,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-252","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-publications"],"_links":{"self":[{"href":"https:\/\/mpateraki.org\/index.php?rest_route=\/wp\/v2\/posts\/252","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mpateraki.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mpateraki.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mpateraki.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mpateraki.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=252"}],"version-history":[{"count":3,"href":"https:\/\/mpateraki.org\/index.php?rest_route=\/wp\/v2\/posts\/252\/revisions"}],"predecessor-version":[{"id":259,"href":"https:\/\/mpateraki.org\/index.php?rest_route=\/wp\/v2\/posts\/252\/revisions\/259"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mpateraki.org\/index.php?rest_route=\/wp\/v2\/media\/256"}],"wp:attachment":[{"href":"https:\/\/mpateraki.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=252"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mpateraki.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=252"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mpateraki.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=252"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}