{"id":809,"date":"2015-03-18T12:12:20","date_gmt":"2015-03-18T12:12:20","guid":{"rendered":"http:\/\/www.cardiff.ac.uk\/sdna\/?p=809"},"modified":"2015-03-18T12:12:20","modified_gmt":"2015-03-18T12:12:20","slug":"ironing-out-the-kinks-in-angular-network-analysis","status":"publish","type":"post","link":"https:\/\/research-sites.cardiff.ac.uk\/spatial-design-network-analysis-sdna\/ironing-out-the-kinks-in-angular-network-analysis\/","title":{"rendered":"Ironing out the kinks in angular network analysis"},"content":{"rendered":"<p><em>New research published on theoretical network analysis<\/em><\/p>\n<p>Spatially localized closeness and betweenness are the bread and butter of modern spatial network analysis, and in particular, spatially localized angular analysis has become something of a <em>de facto<\/em> standard. \u00a0But did you know this standard contains a fundamental contradiction?<\/p>\n<p>Cooper, C. H. V. (2015)\u00a0<a href=\"http:\/\/www.tropic.org.uk\/~crispin\/research\/spatial%20localization%20of%20closeness%20and%20betweenness%20contradictions%20accepted.pdf\">Spatial localisation of closeness and betweenness measures: a self-contradictory but useful form of network analysis<\/a>. \u00a0International Journal of GIS (accepted, in press).<\/p>\n<p>This paper arose out of an issue we discovered during the design of sDNA. \u00a0Spatial localization usually implies restricting analysis to a certain (Euclidean) scale, but angular shortest paths are by definition no shorter than Euclidean ones, and are longer at least some of the time. \u00a0Thus angular shortest paths break the specification of spatial locality.<\/p>\n<p>Does this matter? \u00a0Usually no, but sometimes yes. \u00a0In particular, weighted angular analysis can suffer from some serious errors if the wrong algorithm is used to handle the contradiction. \u00a0sDNA+ allows a choice of algorithms for just this purpose.<\/p>\n","protected":false},"excerpt":{"rendered":"New research published on theoretical network analysis Spatially localized closeness and betweenness are the bread and butter of modern spatial [&hellip;]","protected":false},"author":99,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,19],"tags":[],"cu_profile":[],"class_list":["post-809","post","type-post","status-publish","format-standard","hentry","category-research","category-all-sdna"],"meta_box":[],"_links":{"self":[{"href":"https:\/\/research-sites.cardiff.ac.uk\/spatial-design-network-analysis-sdna\/wp-json\/wp\/v2\/posts\/809","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/research-sites.cardiff.ac.uk\/spatial-design-network-analysis-sdna\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/research-sites.cardiff.ac.uk\/spatial-design-network-analysis-sdna\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/research-sites.cardiff.ac.uk\/spatial-design-network-analysis-sdna\/wp-json\/wp\/v2\/users\/99"}],"replies":[{"embeddable":true,"href":"https:\/\/research-sites.cardiff.ac.uk\/spatial-design-network-analysis-sdna\/wp-json\/wp\/v2\/comments?post=809"}],"version-history":[{"count":0,"href":"https:\/\/research-sites.cardiff.ac.uk\/spatial-design-network-analysis-sdna\/wp-json\/wp\/v2\/posts\/809\/revisions"}],"wp:attachment":[{"href":"https:\/\/research-sites.cardiff.ac.uk\/spatial-design-network-analysis-sdna\/wp-json\/wp\/v2\/media?parent=809"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/research-sites.cardiff.ac.uk\/spatial-design-network-analysis-sdna\/wp-json\/wp\/v2\/categories?post=809"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/research-sites.cardiff.ac.uk\/spatial-design-network-analysis-sdna\/wp-json\/wp\/v2\/tags?post=809"},{"taxonomy":"cu_profile","embeddable":true,"href":"https:\/\/research-sites.cardiff.ac.uk\/spatial-design-network-analysis-sdna\/wp-json\/wp\/v2\/cu_profile?post=809"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}