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utils/plot: handle empty data in auto_adjust_colormap_lut_and_disp_limit #1419

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utils/plot: handle empty data in auto_adjust_colormap_lut_and_disp_limit #1419

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7 changes: 6 additions & 1 deletion src/mintpy/utils/plot.py
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Original file line number Diff line number Diff line change
Expand Up @@ -388,9 +388,14 @@ def auto_colormap_name(metadata, cmap_name=None, datasetName=None, print_msg=Tru


def auto_adjust_colormap_lut_and_disp_limit(data, num_multilook=1, max_discrete_num_step=20, print_msg=True):
finite_values = np.ma.masked_invalid(data).compressed()
if finite_values.size == 0:
if print_msg:
print('WARNING: no finite pixels found; using neutral display limits.')
return 256, [0.0, 0.0], None

# max step size / min step number for a uniform colormap
unique_values = np.unique(data[~np.isnan(data) * np.isfinite(data)])
unique_values = np.unique(finite_values)
min_val = np.min(unique_values).astype(float)
max_val = np.max(unique_values).astype(float)

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