{"action":"created","issue":{"url":"https://api.github.com/repos/Turfjs/turf/issues/1477","repository_url":"https://api.github.com/repos/Turfjs/turf","labels_url":"https://api.github.com/repos/Turfjs/turf/issues/1477/labels{/name}","comments_url":"https://api.github.com/repos/Turfjs/turf/issues/1477/comments","events_url":"https://api.github.com/repos/Turfjs/turf/issues/1477/events","html_url":"https://github.com/Turfjs/turf/issues/1477","id":357370751,"node_id":"MDU6SXNzdWUzNTczNzA3NTE=","number":1477,"title":"Marching Squares on curvilinear grid","user":{"login":"IMMSPgisgroup","id":33963849,"node_id":"MDQ6VXNlcjMzOTYzODQ5","avatar_url":"https://avatars2.githubusercontent.com/u/33963849?v=4","gravatar_id":"","url":"https://api.github.com/users/IMMSPgisgroup","html_url":"https://github.com/IMMSPgisgroup","followers_url":"https://api.github.com/users/IMMSPgisgroup/followers","following_url":"https://api.github.com/users/IMMSPgisgroup/following{/other_user}","gists_url":"https://api.github.com/users/IMMSPgisgroup/gists{/gist_id}","starred_url":"https://api.github.com/users/IMMSPgisgroup/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/IMMSPgisgroup/subscriptions","organizations_url":"https://api.github.com/users/IMMSPgisgroup/orgs","repos_url":"https://api.github.com/users/IMMSPgisgroup/repos","events_url":"https://api.github.com/users/IMMSPgisgroup/events{/privacy}","received_events_url":"https://api.github.com/users/IMMSPgisgroup/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":1,"created_at":"2018-09-05T19:28:32Z","updated_at":"2018-09-11T18:11:43Z","closed_at":null,"author_association":"NONE","body":"Hi,\r\nWe see in \"Isosurfaces geometry, topology, and algorithms\" Rephael Wenger page 45 that \r\n\r\n> Sections 2.2 and 2.3 describe the Marching Squares and Marching Cubes\r\nalgorithms for regular grids where each grid element is a geometric square or\r\ncube. These algorithms work equally well for curvilinear grids that have the\r\nsame combinatorial structure as regular grids but whose elements are convex\r\nquadrilaterals or hexahedra.\r\n> \r\nThat is Marching Squares may be used for curviliniar grid. Realization https://github.com/RaumZeit/MarchingSquares.js that included in TurfJS, in principle allow using curvilinear grid. But in TurfJS this feature not used. In https://github.com/Turfjs/turf/blob/master/packages/turf-isolines/index.js function rescaleIsolines(createdIsoLines, matrix, points) aceptable only for regular grid. "},"comment":{"url":"https://api.github.com/repos/Turfjs/turf/issues/comments/420368288","html_url":"https://github.com/Turfjs/turf/issues/1477#issuecomment-420368288","issue_url":"https://api.github.com/repos/Turfjs/turf/issues/1477","id":420368288,"node_id":"MDEyOklzc3VlQ29tbWVudDQyMDM2ODI4OA==","user":{"login":"IMMSPgisgroup","id":33963849,"node_id":"MDQ6VXNlcjMzOTYzODQ5","avatar_url":"https://avatars2.githubusercontent.com/u/33963849?v=4","gravatar_id":"","url":"https://api.github.com/users/IMMSPgisgroup","html_url":"https://github.com/IMMSPgisgroup","followers_url":"https://api.github.com/users/IMMSPgisgroup/followers","following_url":"https://api.github.com/users/IMMSPgisgroup/following{/other_user}","gists_url":"https://api.github.com/users/IMMSPgisgroup/gists{/gist_id}","starred_url":"https://api.github.com/users/IMMSPgisgroup/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/IMMSPgisgroup/subscriptions","organizations_url":"https://api.github.com/users/IMMSPgisgroup/orgs","repos_url":"https://api.github.com/users/IMMSPgisgroup/repos","events_url":"https://api.github.com/users/IMMSPgisgroup/events{/privacy}","received_events_url":"https://api.github.com/users/IMMSPgisgroup/received_events","type":"User","site_admin":false},"created_at":"2018-09-11T18:11:43Z","updated_at":"2018-09-11T18:11:43Z","author_association":"NONE","body":"Hi rowanwins\r\nWe use MarchingSquares.js directly (but in latest version something strange :( - [https://github.com/RaumZeit/MarchingSquares.js/issues/19](url),  [https://github.com/RaumZeit/MarchingSquares.js/issues/18](url) ). We made tool for transormation result MarchingSquares.js (MarchingSquares.js works for curvilinear grid, but coordinates not real) for curvilinear grid. We rely for most Turf-familiar tool, becose isoline for curvilinear grid need not only for us."}}
{"actor":{"display_login":"IMMSPgisgroup"}}