{"id":32,"date":"2020-12-14T19:29:09","date_gmt":"2020-12-15T02:29:09","guid":{"rendered":"https:\/\/blogs.ubc.ca\/geob370wolfcorridormapping\/?page_id=32"},"modified":"2020-12-14T22:42:14","modified_gmt":"2020-12-15T05:42:14","slug":"corridor-mapping","status":"publish","type":"page","link":"https:\/\/blogs.ubc.ca\/geob370wolfcorridormapping\/methods\/corridor-mapping\/","title":{"rendered":"Corridor mapping"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Each run of the \u2018Linkage Pathways\u2019 tool from the Linkage Mapper toolbox required a new folder, containing only the resistance GRID and the core habitat shapefile. After manually inputting these two inputs, the main steps of the tool are as follows (McRae &amp; Kavanagh, 2011):<\/span><\/p>\n<ol>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">Identify Adjacent (neighbouring) Core Areas<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">Construct a Network of Core Areas<\/span>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">We chose \u2018Connect ALL Core Areas\u2019 as our Network Adjacency Method, as opposed to Euclidean or Cost-Weighted methods<\/span><\/li>\n<\/ul>\n<\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">Calculate Cost-Weighted Distances and Least-Cost Paths<\/span>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">We unchecked \u2018Drop corridors that Intersect Core Areas\u2019<\/span><\/li>\n<\/ul>\n<\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">Prune Network (Optional)<\/span>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">We did not check this option<\/span><\/li>\n<\/ul>\n<\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">Calculate, Normalize, and Mosaic Corridors<\/span>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 <\/span><span style=\"font-weight: 400;\">We also chose to truncate corridors to 200km<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p><span style=\"font-weight: 400;\">\u00a0<\/span><span style=\"font-weight: 400;\">The outputs of the tool include vectors as well as raster maps of the corridors. Initially, we worked with only four of the core habitat areas until we had perfected our resistance raster and use of the tool. Using the tool for our entire project area with all core areas resulted in 28 individual corridors and a run time of 4 minutes and 22 seconds. Learning to use the Linkage Mapper tool took a lot of trial and error, but its outputs are truly more elaborate than ArcGIS Pro\u2019s \u2018Corridors\u2019 tool (which only produces vector line least-cost paths, Step 3 of this tool) (Figure 6) and we highly recommend it for future projects. <\/span><\/p>\n<p>&nbsp;<\/p>\n<div id=\"attachment_59\" style=\"width: 625px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/blogs.ubc.ca\/geob370wolfcorridormapping\/files\/2020\/12\/Screen-Shot-2020-12-14-at-9.01.08-PM.png\" rel=\"attachment wp-att-59\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-59\" class=\"wp-image-59 size-full\" src=\"https:\/\/blogs.ubc.ca\/geob370wolfcorridormapping\/files\/2020\/12\/Screen-Shot-2020-12-14-at-9.01.08-PM.png\" alt=\"\" width=\"615\" height=\"270\" srcset=\"https:\/\/blogs.ubc.ca\/geob370wolfcorridormapping\/files\/2020\/12\/Screen-Shot-2020-12-14-at-9.01.08-PM.png 615w, https:\/\/blogs.ubc.ca\/geob370wolfcorridormapping\/files\/2020\/12\/Screen-Shot-2020-12-14-at-9.01.08-PM-300x132.png 300w\" sizes=\"auto, (max-width: 615px) 100vw, 615px\" \/><\/a><p id=\"caption-attachment-59\" class=\"wp-caption-text\">Figure 6. (a) Least-cost paths between core habitat areas, mapped as line vectors. Resistance raster below. (b) Normalized and mosaicked corridors of the Vancouver Island wolf between core habitat areas, with lighter-coloured corridor cells indicating each cell\u2019s relative value of connectivity.<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Each run of the \u2018Linkage Pathways\u2019 tool from the Linkage Mapper toolbox required a new folder, containing only the resistance GRID and the core habitat shapefile. After manually inputting these two inputs, the main steps of the tool are as &hellip; <a href=\"https:\/\/blogs.ubc.ca\/geob370wolfcorridormapping\/methods\/corridor-mapping\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":69387,"featured_media":0,"parent":16,"menu_order":5,"comment_status":"closed","ping_status":"closed","template":"full-width-page.php","meta":{"footnotes":""},"class_list":["post-32","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/blogs.ubc.ca\/geob370wolfcorridormapping\/wp-json\/wp\/v2\/pages\/32","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.ubc.ca\/geob370wolfcorridormapping\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/blogs.ubc.ca\/geob370wolfcorridormapping\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.ubc.ca\/geob370wolfcorridormapping\/wp-json\/wp\/v2\/users\/69387"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.ubc.ca\/geob370wolfcorridormapping\/wp-json\/wp\/v2\/comments?post=32"}],"version-history":[{"count":5,"href":"https:\/\/blogs.ubc.ca\/geob370wolfcorridormapping\/wp-json\/wp\/v2\/pages\/32\/revisions"}],"predecessor-version":[{"id":91,"href":"https:\/\/blogs.ubc.ca\/geob370wolfcorridormapping\/wp-json\/wp\/v2\/pages\/32\/revisions\/91"}],"up":[{"embeddable":true,"href":"https:\/\/blogs.ubc.ca\/geob370wolfcorridormapping\/wp-json\/wp\/v2\/pages\/16"}],"wp:attachment":[{"href":"https:\/\/blogs.ubc.ca\/geob370wolfcorridormapping\/wp-json\/wp\/v2\/media?parent=32"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}