Plotting centroid coordinates
Because we can't plot whole bounding boxes, we summarize the bounding box location into a single point called a centroid. Plotting these on a Basemap map is straightforward. Once we calculate the centroids, we separate the longitudes and latitudes, then pass to the .scatter() method.
The Basemap object m has been created for you. The dataset tweets_sotu and function calculateCentroid() have also been loaded.
This exercise is part of the course
Analyzing Social Media Data in Python
Exercise instructions
- Calculate the centroids and store in
centroids. - Set the argument
zorderinfillcontinentssuch that the continents appear behind the points. - Plot the points. Remember to set the
latlonargument to the correct value.
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Calculate the centroids for the dataset
# and isolate longitudue and latitudes
centroids = ____[____].apply(____)
lon = [x[0] for x in centroids]
lat = [x[1] for x in centroids]
# Draw continents, coastlines, countries, and states
m.fillcontinents(color='white', ____ = ____)
m.drawcoastlines(color='gray')
m.drawcountries(color='gray')
m.drawstates(color='gray')
# Draw the points and show the plot
____.____(____, ____, ____ = True, alpha = 0.7)
plt.show()