{"id":259,"date":"2019-01-03T20:47:24","date_gmt":"2019-01-04T04:47:24","guid":{"rendered":"https:\/\/blogs.ubc.ca\/dminney\/?p=259"},"modified":"2019-01-03T20:47:25","modified_gmt":"2019-01-04T04:47:25","slug":"digital-terrain-modelling-and-multi-criteria-analysis","status":"publish","type":"post","link":"https:\/\/blogs.ubc.ca\/dminney\/2019\/01\/03\/digital-terrain-modelling-and-multi-criteria-analysis\/","title":{"rendered":"Digital Terrain Modelling and Multi-Criteria Analysis"},"content":{"rendered":"\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"812\" src=\"https:\/\/blogs.ubc.ca\/dminney\/files\/2019\/01\/Osoyoos-TIN-1024x812.jpg\" alt=\"\" class=\"wp-image-260\" srcset=\"https:\/\/blogs.ubc.ca\/dminney\/files\/2019\/01\/Osoyoos-TIN-1024x812.jpg 1024w, https:\/\/blogs.ubc.ca\/dminney\/files\/2019\/01\/Osoyoos-TIN-300x238.jpg 300w, https:\/\/blogs.ubc.ca\/dminney\/files\/2019\/01\/Osoyoos-TIN-768x609.jpg 768w, https:\/\/blogs.ubc.ca\/dminney\/files\/2019\/01\/Osoyoos-TIN-1250x992.jpg 1250w, https:\/\/blogs.ubc.ca\/dminney\/files\/2019\/01\/Osoyoos-TIN-400x317.jpg 400w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Summary<\/h3>\n\n\n\n<p>A Triangulated Irregular Network (TIN) was created from an elevation dataset for the Osoyoos Lake region.<\/p>\n\n\n\n<p>The multi-criteria analysis map was created to meet the criteria set out by the botanist. The criteria focused on in this situation were for an area of 700 hectares,with an importance of aspect over elevation and slope. To create this map, the following steps were taken:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>A DEM was created from an\nelevation dataset, with the cell size (resolution) set to 50m x 50m (equivalent\nto 0.25 hectares). <\/li><li>From this DEM, I was able to\ncreate three files: Aspect, Elevation, and Slope. These were then normalized\nusing Fuzzy Membership. Using an AHP calculator (as seen below), Aspect,\nElevation, and Slope were weighted to create the multi-criteria evaluation\nlayer. <\/li><li>The layer was then\nclassified so that only 700 hectares were shown. <\/li><\/ul>\n\n\n\n<p>The final map includes three classes. The\nfirst includes MCE weighted results only, where the results from the AHP\ncalculator were used. Since aspect was determined to be slightly more important\nthan both elevation and slope in determining sensitive areas for the identified\nspecies, it\u2019s criteria of importance value was 0.6, whereas elevation and slope\nhave a value of 0.2 each. The second includes an alternative method, using a\nequal weights for each of the three criteria. The third class is an overlay of both\nthe MCE Weighted method and the MCE33 weighted method, producing the\nhighest-ranking cells. Each of the classes however contain a different area.\nThe first class includes 232 hectares. The second class also includes 232\nhectares. The third class contains 455 hectares. Overall, there are a small\namount of areas suitable for the rare species, however, through looking at this\nmap, it should be easily identifiable. <\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"3221\" height=\"2549\" src=\"https:\/\/blogs.ubc.ca\/dminney\/files\/2019\/01\/MCE-Map.jpg\" alt=\"\" class=\"wp-image-261\" srcset=\"https:\/\/blogs.ubc.ca\/dminney\/files\/2019\/01\/MCE-Map.jpg 3221w, https:\/\/blogs.ubc.ca\/dminney\/files\/2019\/01\/MCE-Map-300x237.jpg 300w, https:\/\/blogs.ubc.ca\/dminney\/files\/2019\/01\/MCE-Map-768x608.jpg 768w, https:\/\/blogs.ubc.ca\/dminney\/files\/2019\/01\/MCE-Map-1024x810.jpg 1024w, https:\/\/blogs.ubc.ca\/dminney\/files\/2019\/01\/MCE-Map-1250x989.jpg 1250w, https:\/\/blogs.ubc.ca\/dminney\/files\/2019\/01\/MCE-Map-400x317.jpg 400w\" sizes=\"auto, (max-width: 3221px) 100vw, 3221px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Accomplishments<\/h3>\n\n\n\n<p>Gained an understanding of how to create TINs. Created data from a DEM such as aspect and slope, and normalized the data using fuzzy memberships and the raster calculator in order to perform a multi-criteria analysis. <br><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Summary A Triangulated Irregular Network (TIN) was created from an elevation dataset for the Osoyoos Lake region. The multi-criteria analysis map was created to meet the criteria set out by the botanist. The criteria focused on in this situation were for an area of 700 hectares,with an importance of aspect over elevation and slope. To create this map, the following steps were taken: A DEM was created from an elevation dataset, with the cell size (resolution) set to 50m x 50m (equivalent to 0.25 hectares). From this DEM, I was&#8230;<a class=\"read-more\" href=\"https:\/\/blogs.ubc.ca\/dminney\/2019\/01\/03\/digital-terrain-modelling-and-multi-criteria-analysis\/\">read more<\/a><\/p>\n","protected":false},"author":44054,"featured_media":262,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[568557],"tags":[],"class_list":["post-259","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-geographic-information-systems","et-bg-layout-dark","et-white-bg"],"_links":{"self":[{"href":"https:\/\/blogs.ubc.ca\/dminney\/wp-json\/wp\/v2\/posts\/259","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.ubc.ca\/dminney\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.ubc.ca\/dminney\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.ubc.ca\/dminney\/wp-json\/wp\/v2\/users\/44054"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.ubc.ca\/dminney\/wp-json\/wp\/v2\/comments?post=259"}],"version-history":[{"count":1,"href":"https:\/\/blogs.ubc.ca\/dminney\/wp-json\/wp\/v2\/posts\/259\/revisions"}],"predecessor-version":[{"id":263,"href":"https:\/\/blogs.ubc.ca\/dminney\/wp-json\/wp\/v2\/posts\/259\/revisions\/263"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.ubc.ca\/dminney\/wp-json\/wp\/v2\/media\/262"}],"wp:attachment":[{"href":"https:\/\/blogs.ubc.ca\/dminney\/wp-json\/wp\/v2\/media?parent=259"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.ubc.ca\/dminney\/wp-json\/wp\/v2\/categories?post=259"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.ubc.ca\/dminney\/wp-json\/wp\/v2\/tags?post=259"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}