Bugs: images & colormaps

Chips converts NaN pixel values to the minimum data value (and +Inf values to the maximum data value). This may make it difficult to differentiate those values from finite pixel values.

Some minor ticks may not be rendered when an image is zoomed out and tickformat=%ra or %dec. This only appears to happen when the axis covers a large range (e.g. 10 degrees) and is relatively close to one of the poles.

As an example, there are no minor tick marks South of -60 in

which was created with the following code

chips> add_image('broad_flux.img', ['depth', 50, 'threshold', [0, 1e-6]])
chips> set_xaxis(['tickformat', '%ra'])
chips> set_yaxis(['tickformat', '%dec'])
chips> set_axis('all', ['tickstyle', 'outside'])
chips> zoom(0.9)
chips> set_plot_aspect_ratio('fit')

This will default to being a pseudo-color image.