Generative height maps created with Processing (Java) and P5js (JavaScript). The heightmaps are based on Perlin noise with manipulated Level Of Detail and fallof, towards a virtual map center so that there will be one broad area of higher values (mountainous region) amidst values of lower values (valleys/lakes). The colors denote height differences, with green around sea level and mostly flat areas and white being glaciers and are inspired by the Seattle Sectional Aeronautical Chart with a scale of 1:500000, with lines of latitude/longitude on Lambert Conformal Conic Projection.
The greyscale images reveal the underlying noise values.
The generative map below will take a few seconds to load.
