image_base = ../chatham50/
bg.jpg overlay= layer_type1_20260410_230353.png, fg.png, layer_track_20260410_230353.png, layer_hail_20260410_230353.png, layer_warn_20260410_230353.png, ../legends/legend_warnings_type.png
bg.jpg overlay= layer_type1_20260410_231056.png, fg.png, layer_track_20260410_231056.png, layer_hail_20260410_231056.png, layer_warn_20260410_231056.png, ../legends/legend_warnings_type.png
bg.jpg overlay= layer_type1_20260410_231758.png, fg.png, layer_track_20260410_231758.png, layer_hail_20260410_231758.png, layer_warn_20260410_231758.png, ../legends/legend_warnings_type.png
bg.jpg overlay= layer_type1_20260410_232456.png, fg.png, layer_track_20260410_232456.png, layer_hail_20260410_232456.png, layer_warn_20260410_232456.png, ../legends/legend_warnings_type.png
bg.jpg overlay= layer_type1_20260410_233153.png, fg.png, layer_track_20260410_233153.png, layer_hail_20260410_233153.png, layer_warn_20260410_233153.png, ../legends/legend_warnings_type.png