NCL topo 15lev

Summary

NCL topo 15lev is a sequential colormap from ncar. Lightness spans 0.39–1.00, hue sweeps 271° from violet to orange, and order breaks under protan, deutan, and tritan simulation.

NCL discrete topographic ramp.

Perceptual profile (OKLCh)

• Lightness: 0.391 → 1.000 (range 0.610, min 0.391, max 1.000); non-monotonic; midpoint 0.699
• Chroma: min 0.000, max 0.232, mean 0.095
• Hue: 270.6° → 0.0° (span 270.6°), path folded; quadrants: violet, green, mint, chartreuse, yellow, orange
• Endpoint temperature: cool → null
• Perceptual ΔE: total 200.8, mean/step 0.787, max step 71.717, smoothness 0.000, speed 0.787

Colorblind safety (ΔE under simulated CVD)

• Protanopia: ΔE total 181.1; preserves order: no
• Deuteranopia: ΔE total 173.8; preserves order: no
• Tritanopia: ΔE total 183.0; preserves order: no

Related

• Family: ncar
• Source: NCL/NCAR — UCAR (via hhuangwx/cmaps MIT wrapper)
• Similar sequential maps: NCL CBR drywet, NCL CBR wet, GMT drywet, GMT topo, MPL terrain (NCL), NCL precip 15lev, NCL temp 19lev, NCL wind 17lev
• All colormaps