I am trying to create a figure in Python containing subplots with a gnomview map inside and data points overplotted. I am using this code: import healpy as hp import matplotlib.pyplot as plt import numpy as np nside = 32 npix = hp.nside2npix(nside) rot = [0, 0] xsize = 500 reso = 1.0 fig, axs = plt.subplots(1, 3, figsize=(15, 5)) data = np.random.randn(npix) num_points = 100 ra = np.random.uniform(0, 360, num_points) dec = np.random.uniform(-90, 90, num_points) for i, ax in enumerate(axs): hp.gnomview(data, rot=rot, xsize=xsize, reso=reso, sub=(1, 3, i + 1), fig=fig, notext=True, cbar=False) hp.projscatter(ra, dec, lonlat=True, coord='G') plt.tight_layout() plt.show() This creates the figure with subplots showing the gnomview in each of them, but the scattered data points are not displayed. I also tried substituting the line hp.projscatter(...) with ax.scatter(ra, dec, marker='o', color='red', s=10), but again no points are being shown. What am I doing wrong? Is there an alternative way to plot data points on top of healpy gnomview subplots? Continue reading...