{"action":"created","issue":{"url":"https://api.github.com/repos/proj4js/proj4js/issues/148","labels_url":"https://api.github.com/repos/proj4js/proj4js/issues/148/labels{/name}","comments_url":"https://api.github.com/repos/proj4js/proj4js/issues/148/comments","events_url":"https://api.github.com/repos/proj4js/proj4js/issues/148/events","html_url":"https://github.com/proj4js/proj4js/issues/148","id":97378011,"number":148,"title":"Problem with some zone convertion","user":{"login":"federicolucca","id":2663616,"avatar_url":"https://avatars.githubusercontent.com/u/2663616?v=3","gravatar_id":"","url":"https://api.github.com/users/federicolucca","html_url":"https://github.com/federicolucca","followers_url":"https://api.github.com/users/federicolucca/followers","following_url":"https://api.github.com/users/federicolucca/following{/other_user}","gists_url":"https://api.github.com/users/federicolucca/gists{/gist_id}","starred_url":"https://api.github.com/users/federicolucca/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/federicolucca/subscriptions","organizations_url":"https://api.github.com/users/federicolucca/orgs","repos_url":"https://api.github.com/users/federicolucca/repos","events_url":"https://api.github.com/users/federicolucca/events{/privacy}","received_events_url":"https://api.github.com/users/federicolucca/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2015-07-27T03:27:36Z","updated_at":"2015-07-27T07:07:43Z","closed_at":"2015-07-27T07:07:43Z","body":"var degrees2meters = function(lon, lat) {\r\n\r\n        return proj4(proj4.defs('WGS84'), proj4.defs('EPSG:3857')).forward([lat, lon]);\r\n    }\r\n\r\n    var meters2degrees = function(lon, lat) {\r\n\r\n        return proj4(proj4.defs('EPSG:3857'),proj4.defs('WGS84')).inverse([lat, lon]);\r\n    }\r\n\r\n\r\ni wrote this code ,that takes the lat long from a google map plugin(wgs84) and converts to EPSG:3857,and the inverse.\r\n\r\nWorks fine,but there are some problems on some zone.\r\n\r\nEurope,US,Australia works fine,but i find errors in China and Tibet. I am not a Gis expert someone can help me? \r\n\r\nExample:Nagqu, Tibet, Cina\r\nFrom google(WGS84): [long: 31.476202,lat: 92.05123900000001]\r\nEPSG:3857 after convertion [3503914.7787462194, NaN]  \r\n\r\n\r\n"},"comment":{"url":"https://api.github.com/repos/proj4js/proj4js/issues/comments/125107709","html_url":"https://github.com/proj4js/proj4js/issues/148#issuecomment-125107709","issue_url":"https://api.github.com/repos/proj4js/proj4js/issues/148","id":125107709,"user":{"login":"ahocevar","id":211514,"avatar_url":"https://avatars.githubusercontent.com/u/211514?v=3","gravatar_id":"","url":"https://api.github.com/users/ahocevar","html_url":"https://github.com/ahocevar","followers_url":"https://api.github.com/users/ahocevar/followers","following_url":"https://api.github.com/users/ahocevar/following{/other_user}","gists_url":"https://api.github.com/users/ahocevar/gists{/gist_id}","starred_url":"https://api.github.com/users/ahocevar/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ahocevar/subscriptions","organizations_url":"https://api.github.com/users/ahocevar/orgs","repos_url":"https://api.github.com/users/ahocevar/repos","events_url":"https://api.github.com/users/ahocevar/events{/privacy}","received_events_url":"https://api.github.com/users/ahocevar/received_events","type":"User","site_admin":false},"created_at":"2015-07-27T07:07:43Z","updated_at":"2015-07-27T07:07:43Z","body":"The latitude you are trying to convert cannot be expressed in EPSG:3857. It exceeds the projection bounds. EPSG:3857 is not suitable for polar regions."}}