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refactor: update colormap API for new versions of matplotlib #2825

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refactor: update colormap API for new versions of matplotlib #2825

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2d45033
refactor: update colormap API for new versions of matplotlib
alepr Jul 10, 2026
e43bc18
[pre-commit.ci] auto fixes from pre-commit.com hooks
pre-commit-ci[bot] Jul 10, 2026
609d1c5
Correction to mpl.colormaps
alepr Jul 11, 2026
97236a5
Merge branch 'master' into Fix/colormap-deprecation
alepr Jul 14, 2026
3d1171d
Merge branch 'master' into Fix/colormap-deprecation
alepr Jul 23, 2026
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13 changes: 13 additions & 0 deletions geemap/colormaps.py
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Original file line number Diff line number Diff line change
Expand Up @@ -239,6 +239,19 @@ def plot_colormaps(width: float = 8.0, height: float = 0.4) -> None:

plt.show()

def get_colormap(cmap_name: str, n_class: int | None = None)-> mpl.colors.Colormap:
"""Returns a matplotlib colormap object"""
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if hasattr(plt, "colormaps"):
cmap = plt.colormaps[cmap_name]
if n_class:
cmap = cmap.resampled(n_class)
return cmap
elif hasattr(plt, "get_cmap"):
cmap = plt.get_cmap(cmap_name, n_class)
return cmap
else:
cmap = plt.cm.get_cmap(cmap_name, n_class)
return cmap
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def get_palettes() -> box.Box:
"""Returns a dictionary of colormaps and their associated palettes."""
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19 changes: 9 additions & 10 deletions geemap/common.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3656,7 +3656,7 @@ def save_colorbar(
alpha = 1

if cmap is not None:
cmap = mpl.pyplot.get_cmap(cmap)
cmap = colormaps.get_colormap(cmap)
norm = mpl.colors.Normalize(vmin=vmin, vmax=vmax)

if "palette" in vis_params:
Expand All @@ -3673,7 +3673,7 @@ def save_colorbar(
norm = mpl.colors.Normalize(vmin=vmin, vmax=vmax)

elif cmap is not None:
cmap = mpl.pyplot.get_cmap(cmap)
cmap = colormaps.get_colormap(cmap)
norm = mpl.colors.Normalize(vmin=vmin, vmax=vmax)

else:
Expand Down Expand Up @@ -11919,10 +11919,9 @@ def classify(

if cmap is None:
cmap = "Blues"
try:
cmap = plt.get_cmap(cmap, k)
except:
cmap = plt.cm.get_cmap(cmap, k)

cmap = colormaps.get_colormap(cmap, k)

if colors is None:
colors = [mpl.colors.rgb2hex(cmap(i))[1:] for i in range(cmap.N)]
colors = ["#" + i for i in colors]
Expand Down Expand Up @@ -12676,10 +12675,10 @@ def get_palette_colors(
n_class: The number of colors. Defaults to None.
hashtag: Whether to return a list of hex colors. Defaults to False.
"""
try:
cmap = plt.get_cmap(cmap_name, n_class)
except:
cmap = plt.cm.get_cmap(cmap_name, n_class)
if cmap_name is None:
Comment on lines 12674 to +12678
cmap_name = "viridis"
cmap = colormaps.get_colormap(cmap_name, n_class)

colors = [mpl.colors.rgb2hex(cmap(i))[1:] for i in range(cmap.N)]
if hashtag:
colors = ["#" + i for i in colors]
Expand Down