Skip to content

Prevent automatic scalar mapping when plotting RGB images #872

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
atedstone wants to merge 3 commits into
base: main
Choose a base branch
from
Open

Prevent automatic scalar mapping when plotting RGB images #872

Changes from all commits
Commits
Show all changes
3 commits
Select commit Hold shift + click to select a range
5c52b82
bugfix: prevent passing cmap=system default when RGB image is supplie…
atedstone Feb 18, 2026
8b77c31
change to isinstance()
atedstone Feb 18, 2026
f58384e
remove empty line
atedstone Feb 18, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
9 changes: 8 additions & 1 deletion geoutils/raster/raster.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2161,8 +2161,15 @@ def plot(

# Create colorbar
# Use rcParam default
if cmap is None:
if cmap is None and isinstance(bands, int):
# ONLY set a cmap arg for single band images
cmap = plt.get_cmap(plt.rcParams["image.cmap"])
elif cmap is None and isinstance(bands, tuple):
# Leave cmap as None for multi-band image, because if a cmap
# is passed then imshow treats this as an instruction to apply scalar
# mapping, which is not a desirable behaviour (it can result in color-casted
# RGB images for example).
pass
elif isinstance(cmap, str):
cmap = plt.get_cmap(cmap)
elif isinstance(cmap, matplotlib.colors.Colormap):
Expand Down
Loading