Visualizing Data with Leaflet

Background

The 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.

Developed a new visualization based on earthquake data to provide a meaningful way of displaying the data.

Basic Visualization

Basic visualization an earthquake data set.

1. Get data set

   

   The USGS provides earthquake data in a number of different formats, updated every 5 minutes. Visit the USGS GeoJSON Feed page and pick a data set to visualize. When you click on a data set, for example 'All Earthquakes from the Past 7 Days', will be given a JSON representation of that data. Will be using the URL of this JSON to pull in the data for visualization.

   

2. Import & Visualize the Data

   Create a map using Leaflet that plots all of the earthquakes from the data set based on their longitude and latitude.

   • Your data markers should reflect the magnitude of the earthquake in their size and color. Earthquakes with higher magnitudes should appear larger and darker in color.

   • Include popups that provide additional information about the earthquake when a marker is clicked.

   • Create a legend that will provide context for your map data.

   • Visualization should look something like the map above.

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More Data

Plot a second data set on map to illustrate the relationship between tectonic plates and seismic activity. Pull in a second data set and visualize it along side of original set of data. Data on tectonic plates can be found at https://github.com/fraxen/tectonicplates.

In this step..

• Plot a second data set to map.

• Add a number of base maps to choose from as well as separate out from two different data sets into overlays that can be turned on and off independently.

• Add layer controls to our map.

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