{"action":"created","issue":{"url":"https://api.github.com/repos/topojson/topojson/issues/248","repository_url":"https://api.github.com/repos/topojson/topojson","labels_url":"https://api.github.com/repos/topojson/topojson/issues/248/labels{/name}","comments_url":"https://api.github.com/repos/topojson/topojson/issues/248/comments","events_url":"https://api.github.com/repos/topojson/topojson/issues/248/events","html_url":"https://github.com/topojson/topojson/issues/248","id":87473474,"number":248,"title":"Very large shapefiles seem to crash topojson","user":{"login":"daniel-zillion","id":12394992,"avatar_url":"https://avatars.githubusercontent.com/u/12394992?v=3","gravatar_id":"","url":"https://api.github.com/users/daniel-zillion","html_url":"https://github.com/daniel-zillion","followers_url":"https://api.github.com/users/daniel-zillion/followers","following_url":"https://api.github.com/users/daniel-zillion/following{/other_user}","gists_url":"https://api.github.com/users/daniel-zillion/gists{/gist_id}","starred_url":"https://api.github.com/users/daniel-zillion/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/daniel-zillion/subscriptions","organizations_url":"https://api.github.com/users/daniel-zillion/orgs","repos_url":"https://api.github.com/users/daniel-zillion/repos","events_url":"https://api.github.com/users/daniel-zillion/events{/privacy}","received_events_url":"https://api.github.com/users/daniel-zillion/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":3,"created_at":"2015-06-11T19:43:31Z","updated_at":"2016-10-31T21:46:39Z","closed_at":"2016-10-31T21:45:57Z","body":"The command line topojson utility hangs indefinitely when trying to convert the US Census Tract data (~606 MB) shapefile to a topojson.  Because there is no error message, it's hard to tell what error is occurring, if any.  However, no amount of waiting seems to rectify the issue or produce an error message.  I suspect this behavior would be reproducible with other very large shapefiles, although I don't currently have any available to test.  \n\nThis occurs with any options specified (none, -p, -p and -s, etc..).\n"},"comment":{"url":"https://api.github.com/repos/topojson/topojson/issues/comments/257430285","html_url":"https://github.com/topojson/topojson/issues/248#issuecomment-257430285","issue_url":"https://api.github.com/repos/topojson/topojson/issues/248","id":257430285,"user":{"login":"mbostock","id":230541,"avatar_url":"https://avatars.githubusercontent.com/u/230541?v=3","gravatar_id":"","url":"https://api.github.com/users/mbostock","html_url":"https://github.com/mbostock","followers_url":"https://api.github.com/users/mbostock/followers","following_url":"https://api.github.com/users/mbostock/following{/other_user}","gists_url":"https://api.github.com/users/mbostock/gists{/gist_id}","starred_url":"https://api.github.com/users/mbostock/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mbostock/subscriptions","organizations_url":"https://api.github.com/users/mbostock/orgs","repos_url":"https://api.github.com/users/mbostock/repos","events_url":"https://api.github.com/users/mbostock/events{/privacy}","received_events_url":"https://api.github.com/users/mbostock/received_events","type":"User","site_admin":false},"created_at":"2016-10-31T21:46:39Z","updated_at":"2016-10-31T21:46:39Z","body":"Related #80. 2.0 should help with this quite a bit by allowing newline-delimited JSON streams as input (see [shp2json -n](https://github.com/mbostock/shapefile/blob/master/README.md#shp2json_newline_delimited) and [ndjson-cli](https://github.com/mbostock/ndjson-cli)).\r\n\r\nBut, there remain many potential performance improvements in TopoJSON conversion, most significantly of which would be to use a single typed array for coordinates, or one typed array per dimension, rather than GeoJSON’s inherently inefficient practice of using a separate array for each point. I’m not actively working on that, so I’m closing this issue, but maybe someone else will volunteer."}}
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