June 2017
Intermediate to advanced
873 pages
18h 9m
English
Content preview from Dart: Scalable Application DevelopmentBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Exploring the GeoJSON format
GeoJSON is a format for recording geographic data structures, which includes support of geometric definitions, such as points and polygons. For example, the location of an earthquake's epicenter (point) and the area affected (polygon). Part of the GeoJSON can look as follows:
{
"type":"Point",
"coordinates":[122.3818333,45.0686667,12.9]
}
,
"id":"uw61022191"Note
The previous example is a small excerpt from the feed that reports all earthquakes in the past hour (http://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_hour.geojson). Take a moment to look at this feed and get a feel for the type of data this format contains.
To kick off this project, we will create a data-monitoring application that will record information ...
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