Leafleft-Web-Map：一种Web地图，该地图使用基于GeoJSON经度和纬度的传单可视化USGS地震数据和构造板块

# Visualizing Data with Leaflet https://kayannr.github.io/Leafleft-Web-Map/USGS/index.html ## Background  The USGS (United States Geological Survey) is responsible for providing scientific data about natural hazards, the health of our ecosystems and environment; and the impacts of climate and land-use change. They collect a massive amount of data from all over the world each day. This project creates a web map that displays the data gathered from the USGS website. ## Tasks Completed 1. **Gather data set**  The USGS provides earthquake data in a number of different formats, updated every 5 minutes. The [USGS GeoJSON Feed](http://earthquake.usgs.gov/earthquakes/feed/v1.0/geojson.php) page provides the URL of the JSON to pull in the data for the visualization.  2. **Import & Visualize the Data** The Leaflet maps that plot all of the earthquakes from the data set based on their longitude and latitude are displayed below. The features of the maps include: > * Data markers that reflect the magnitude of the earthquake in their size and color. Earthquakes with higher magnitudes appear larger and darker in color. > * Popups that provide additional information about the earthquake when a marker is clicked. > * A legend that provide context for the map data. * **Map 1**  * **Map 2**  * **Map 3**  * **Map 4**