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CSE 163

Geopandas

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Arpan Kapoor�Summer 2026��💭Icebreaker (discuss with neighbors): ‘

What’s the most difficult sport to play?

Add to our Slido!

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Announcements

  • Homework 4: Networks due Friday July 31st at 11:59pm
  • Project Part 2 (EDA) due Sunday August 2nd at 11:59pm
    • Group Projects: only one person needs to submit but add your teammates to your submission using these instructions

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zip

  • Helpful built-in function to help combine lists
  • zip does not return a list! zip returns a generator that you can iterate over once!

x = [1,2,3]

y = [4,5,6]

zip(x, y)

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Geospatial Data!: Map representation of data

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Shapes

  • These live in the geometry column

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Geopandas - pandas with geo data

  • GeoDataFrame and GeoSeries

import geopandas as gpd

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df = gpd.read_file('data_file.shp')

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df.plot(column='some_col', legend=True)

plt.savefig('plot.png')

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Matplotlib

  • Default plots gets plotted on a global figure (think like a painting canvas)
    • Plots would overwrite each other
    • Extra work to plot multiple graph information on the same set of axes

fig, ax = plt.subplots(1)

<plot1>(ax=ax)

<plot2>(ax=ax)

fig.savefig('plot_together.png')

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Matplotlib

  • Default plots gets plotted on a global figure (think like a painting canvas)
    • Plots would overwrite each other
    • Extra work to plot multiple graph information on the same set of axes

fig, ax = plt.subplots(1)

<plot1>(ax=ax)

<plot2>(ax=ax)

fig.savefig('plot_together.png')

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fig, [ax1, ax2] = plt.subplots(1, 2) # width, height

<plot1>(ax=ax1)

<plot2>(ax=ax2)

fig.savefig('plot_separate.png')

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Matplotlib

  • Default plots gets plotted on a global figure (think like a painting canvas)
    • Plots would overwrite each other
    • Extra work to plot multiple graph information on the same set of axes

fig

ax1

ax2

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10 of 13

Matplotlib

  • Default plots gets plotted on a global figure (think like a painting canvas)
    • Plots would overwrite each other
    • Extra work to plot multiple graph information on the same set of axes

fig

ax1

ax2

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11 of 13

Matplotlib

  • Default plots gets plotted on a global figure (think like a painting canvas)
    • Plots would overwrite each other
    • Extra work to plot multiple graph information on the same set of axes

fig

ax1

ax2

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Hurricane Florence

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Hurricane Florence

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