Finding contours of a map¶
This example shows how to find and plot contours on a map.
import matplotlib.pyplot as plt import astropy.units as u import sunpy.map from sunpy.data.sample import AIA_193_IMAGE
Start by loading the sample data.
aiamap = sunpy.map.Map(AIA_193_IMAGE)
In finding a set of contours, we have to provide the level to contour in the
same units as the map data. To find out the units we can inspect
We can see that the units of this map are
ct, or counts. We can now
chose a contour level, and use the
method to extract the contours.
Finally, we can plot the map, and add each of the contours in turn.
Total running time of the script: ( 0 minutes 2.288 seconds)