{"id":1906292,"date":"2023-04-17T15:00:31","date_gmt":"2023-04-17T22:00:31","guid":{"rendered":"https:\/\/www.esri.com\/arcgis-blog\/?post_type=blog&p=1906292"},"modified":"2024-05-15T12:51:03","modified_gmt":"2024-05-15T19:51:03","slug":"create-a-wildlife-corridor-with-the-new-least-cost-corridor-tool-in-arcgis-pro","status":"publish","type":"blog","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/analytics\/create-a-wildlife-corridor-with-the-new-least-cost-corridor-tool-in-arcgis-pro","title":{"rendered":"Create a wildlife corridor with the new Least Cost Corridor tool in ArcGIS Pro"},"author":337362,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_searchwp_excluded":""},"categories":[23341],"tags":[762832,762822,34121,349332,192732],"industry":[],"product":[36561],"class_list":["post-1906292","blog","type-blog","status-publish","format-standard","hentry","category-analytics","tag-connectivity","tag-corridor","tag-distance","tag-least-cost-path","tag-wildlife-corridors","product-arcgis-pro"],"acf":{"authors":[{"ID":337362,"user_firstname":"Sydney","user_lastname":"Walker","nickname":"Sydney Walker","user_nicename":"swalker","display_name":"Sydney Walker","user_email":"swalker@esri.com","user_url":"https:\/\/www.esri.com\/arcgis-blog\/?s=#&author=swalker","user_registered":"2023-04-17 17:02:07","user_description":"Sydney is a Product Engineer on the Spatial Analyst team at Esri, working on tools for hydrologic, terrain, and distance analyses. Her primary interest is in the application of GIS for solving problems in sustainable development, water resource management, and climate change impacts.","user_avatar":""}],"short_description":"This blog introduces the new Least Cost Corridor tool in the Distance toolset in ArcGIS Pro 3.1. Read to learn more about its functionality.","flexible_content":[{"acf_fc_layout":"content","content":"

When connecting <\/span>locations,<\/span> rather than a thin line<\/span>, you may want a wider area making the connection<\/span>.<\/span> Perhaps you<\/span> are designing a wildlife corridor between two areas of habitat, or a <\/span>powerline<\/span> that <\/span>will travel through a densely populated area<\/span>. Either situation is a perfect application for a corridor, a wider path connecting locations.<\/span> The new <\/span><\/span>Least Cost Corridor<\/span><\/span><\/a> tool<\/span> identifies<\/span> corridors where the total travel cost is less than a specified threshold.<\/span> This tool was developed <\/span>to take advantage of<\/span> the <\/span><\/span>distortion<\/span>–<\/span>free<\/span><\/span><\/a> algorithm <\/span>implemented<\/span> in the newer <\/span>d<\/span>istance tools<\/span> and <\/span>to <\/span>enhance <\/span>the<\/span> corridor <\/span>analysis <\/span>capabilities<\/span> of<\/span> the ArcGIS Spatial Analyst extension<\/a><\/span>.<\/span><\/span><\/p>\n"},{"acf_fc_layout":"image","image":{"ID":1909052,"id":1909052,"title":"LCC_Blog_CorridorFigure","filename":"LCC_Blog_CorridorFigure-2.jpg","filesize":6620,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_CorridorFigure-2.jpg","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/analytics\/create-a-wildlife-corridor-with-the-new-least-cost-corridor-tool-in-arcgis-pro\/lcc_blog_corridorfigure-3","alt":"","author":"337362","description":"","caption":"A corridor is an area that connects two locations and encompasses all possible cost paths below a specified accumulative cost. On the left is an example corridor (blue area) displayed with the optimal path (blue line). On the right is the corridor with all the possible cost paths whose values are less than the specified threshold. ","name":"lcc_blog_corridorfigure-3","status":"inherit","uploaded_to":1906292,"date":"2023-04-19 03:53:30","modified":"2023-04-19 03:53:50","menu_order":0,"mime_type":"image\/jpeg","type":"image","subtype":"jpeg","icon":"https:\/\/www.esri.com\/arcgis-blog\/wp-includes\/images\/media\/default.png","width":530,"height":150,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_CorridorFigure-2-213x150.jpg","thumbnail-width":213,"thumbnail-height":150,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_CorridorFigure-2.jpg","medium-width":464,"medium-height":131,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_CorridorFigure-2.jpg","medium_large-width":530,"medium_large-height":150,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_CorridorFigure-2.jpg","large-width":530,"large-height":150,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_CorridorFigure-2.jpg","1536x1536-width":530,"1536x1536-height":150,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_CorridorFigure-2.jpg","2048x2048-width":530,"2048x2048-height":150,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_CorridorFigure-2.jpg","card_image-width":530,"card_image-height":150,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_CorridorFigure-2.jpg","wide_image-width":530,"wide_image-height":150}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"

An earlier tool, <\/span>Corridor<\/span><\/a>, was used for creating corridors. This tool is based on calculating between cell centers and did not take advantage of the newer, more accurate distance algorithm. As a result, inconsistencies could occur, such as certain cells being disconnected from the corridor. By using the improved distance algorithm, the Least Cost Corridor tool resolves the possibility of creating disconnected cells in the output result. Additionally, the Least Cost Corridor tool has enhanced analysis capabilities.<\/span>\u00a0<\/span><\/p>\n

Creating a corridor with the <\/span>Corridor<\/span><\/a> tool required use of another geoprocessing tool to apply a threshold and obtain the final corridor result. With the Least Cost Corridor tool, you can create the corridor in a single step because it has parameters for applying an accumulative cost threshold or a percent of least cost threshold. The percent of least cost option allows you to create a corridor relative to the least cost without having to know the least cost value ahead of time. Whichever way it is specified, the threshold determines which cells are included in the corridor and allows for more streamlined and informative analyses.<\/span><\/p>\n

It\u2019s<\/span> easy to implement Least Cost Corridor in your Distance workflow as the inputs<\/span> come directly from the<\/span> outputs<\/span> of existing Distance tools<\/span>.<\/span> This workflow starts by<\/span> run<\/span>ning<\/span> either<\/span> the<\/span> <\/span>Distance Accumulation<\/span><\/span><\/a> or <\/span><\/span>Distance Allocation<\/span><\/span><\/a> tool<\/span> for each <\/span>of the two <\/span>region<\/span>s<\/span> you want to connect <\/span>with the same analysis settings.<\/span> From this <\/span>you<\/span> get<\/span> accumulative cost and <\/span>the <\/span>back direction raster<\/span>s<\/span> for each <\/span>region<\/span>;<\/span> a total of four rasters. <\/span>You then use these rasters as the inputs for Least Cost Corridor. The<\/span> Least Cost Corridor <\/span>tool <\/span>combines the <\/span>distance rasters and applies the threshold you define to create <\/span>the <\/span>final corridor result.<\/span><\/span><\/p>\n

As an example, <\/span>say you<\/span> need to <\/span>plan a wildlife corridor between two patches of bear habitat as part of a conservation effort<\/span>. <\/span>These bear habitats are <\/span>located<\/span> on either side of a developed <\/span>area<\/span>,<\/span> and <\/span>you<\/span> need<\/span> to design a safe corridor <\/span>for the bears to<\/span> travel<\/span> between <\/span>habitats<\/span>. <\/span>You want<\/span> to <\/span>select areas that are safe for bears to be in<\/span>, areas <\/span>that are <\/span>forested <\/span>with minimal development, and <\/span>located<\/span> away from roads and people. To capture these<\/span> preferences<\/span>,<\/span> you can<\/span> create<\/span> a<\/span> <\/span>cost<\/span> surface<\/span><\/span><\/a> based <\/span>on<\/span> land-use<\/span> as well as distance from<\/span> roads and human development<\/span>. <\/span>In this situation, developed<\/span> areas <\/span>and<\/span> land <\/span>very close<\/span> to development incurs <\/span>a <\/span>high cost<\/span>.<\/span> F<\/span>orested land <\/span>and areas farthest from development have low costs<\/span>.<\/span> Utilizing this cost surface<\/span> as input to<\/span> the <\/span><\/span>Distance Accumulation<\/span><\/span><\/a> tool<\/span>, you can then use<\/span> Least Cost Corridor <\/span>to create the corridor<\/span> between these regions<\/span>.<\/span><\/span><\/p>\n"},{"acf_fc_layout":"image","image":{"ID":1906482,"id":1906482,"title":"LCC_Blog_costsurface","filename":"LCC_Blog_costsurface.jpg","filesize":94504,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_costsurface.jpg","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/analytics\/create-a-wildlife-corridor-with-the-new-least-cost-corridor-tool-in-arcgis-pro\/lcc_blog_costsurface","alt":"cost surface between patches or bear habitat","author":"337362","description":"","caption":"The two regions (blue and pink) to be connected using the identified cost surface. The cost surface values range from lower cost (green) to higher cost (red).","name":"lcc_blog_costsurface","status":"inherit","uploaded_to":1906292,"date":"2023-04-17 18:39:29","modified":"2023-04-17 21:12:19","menu_order":0,"mime_type":"image\/jpeg","type":"image","subtype":"jpeg","icon":"https:\/\/www.esri.com\/arcgis-blog\/wp-includes\/images\/media\/default.png","width":702,"height":371,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_costsurface-213x200.jpg","thumbnail-width":213,"thumbnail-height":200,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_costsurface.jpg","medium-width":464,"medium-height":245,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_costsurface.jpg","medium_large-width":702,"medium_large-height":371,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_costsurface.jpg","large-width":702,"large-height":371,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_costsurface.jpg","1536x1536-width":702,"1536x1536-height":371,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_costsurface.jpg","2048x2048-width":702,"2048x2048-height":371,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_costsurface.jpg","card_image-width":702,"card_image-height":371,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_costsurface.jpg","wide_image-width":702,"wide_image-height":371}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"

To obtain the inputs for the Least Cost Corridor tool, you will run the <\/span>Distance Accumulation<\/span><\/a> tool twice. Once for the blue region and once for the pink region. Use the same cost surface and analysis settings. The resulting outputs are an accumulative cost distance and a back direction raster for each region.<\/span>\u00a0<\/span><\/p>\n

In the Least Cost Corridor tool, you input the four rasters and select an appropriate threshold for the situation. In this example, a 1% threshold is applied so that overall cost is minimized, and a sizeable area is still identified.<\/span><\/p>\n"},{"acf_fc_layout":"image","image":{"ID":1906492,"id":1906492,"title":"LCC_Blog_1pcorridor","filename":"LCC_Blog_1pcorridor.jpg","filesize":100514,"url":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_1pcorridor.jpg","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-pro\/analytics\/create-a-wildlife-corridor-with-the-new-least-cost-corridor-tool-in-arcgis-pro\/lcc_blog_1pcorridor","alt":"1% least cost corridor","author":"337362","description":"","caption":"The final corridor between two locations, created using the Least Cost Corridor tool. Lower costs within the corridor are a white or lighter purple while higher costs are a darker purple.","name":"lcc_blog_1pcorridor","status":"inherit","uploaded_to":1906292,"date":"2023-04-17 18:40:13","modified":"2023-04-17 21:11:49","menu_order":0,"mime_type":"image\/jpeg","type":"image","subtype":"jpeg","icon":"https:\/\/www.esri.com\/arcgis-blog\/wp-includes\/images\/media\/default.png","width":700,"height":366,"sizes":{"thumbnail":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_1pcorridor-213x200.jpg","thumbnail-width":213,"thumbnail-height":200,"medium":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_1pcorridor.jpg","medium-width":464,"medium-height":243,"medium_large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_1pcorridor.jpg","medium_large-width":700,"medium_large-height":366,"large":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_1pcorridor.jpg","large-width":700,"large-height":366,"1536x1536":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_1pcorridor.jpg","1536x1536-width":700,"1536x1536-height":366,"2048x2048":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_1pcorridor.jpg","2048x2048-width":700,"2048x2048-height":366,"card_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_1pcorridor.jpg","card_image-width":700,"card_image-height":366,"wide_image":"https:\/\/www.esri.com\/arcgis-blog\/app\/uploads\/2023\/04\/LCC_Blog_1pcorridor.jpg","wide_image-width":700,"wide_image-height":366}},"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"

\u00a0<\/span>In the final corridor raster, all cells with accumulative cost under the specified threshold are included. The cost is lowest towards the center of the corridor and increases as you move outward from the center. There are some thinner parts of the corridor that diverge from the main, thicker area of the corridor. These thinner parts are routing around higher cost areas and are included because they too are below the 1% threshold.<\/span><\/p>\n

Whether you are interested in creating wildlife corridors, proposing a new hiking trail, or siting a transmission line, the new Least Cost Corridor<\/a> tool is a powerful addition to distance analysis workflows.<\/p>\n

If you are interested in learning more about corridors, please see the following blog post and conceptual documentation:<\/p>\n