[sean0407]

Summary

- cm.get_cmap(...)
+ pl.get_cmap(...)

Replace removed matplotlib.cm.get_cmap calls in the three OpenSfM plotting/import scripts with matplotlib.pyplot.get_cmap. This preserves named and default colormap behavior. Closes #1116.

Evidence

• Before: In Matplotlib 3.11.2, hasattr(matplotlib.cm, "get_cmap") returned False.
• After: A credential-free, network-denied smoke check imported all three changed scripts against minimal OpenSfM stubs; both depth_colormap paths and the plot_graph path completed. The named/default pyplot.get_cmap paths and ScalarMappable color conversion passed.
• git diff --check, Python AST parsing of all three changed files, and patch_policy.py passed (3 files, 7 changed lines, no binary changes).

Merge Danger

Door: two-way

Blast Radius: narrow

Only colormap lookup calls in three scripts change; reverting restores the previous behavior.

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