P—56 · Geometric comparison, not a site allocation
The supplied model uses a population baseline of 69,483,900, circular settlement envelopes of 25 km² and a gross density of 2,000 people per km². Compare what changes when the edge-to-edge gap changes.
Strict ten-mile edge gap
The illustrated layout has capacity for 27 million people, leaving approximately 42.48 million outside it. This is a trial output, not a proven maximum. Under the stated geometry, the model’s generous upper bound is still below the whole-population requirement.
Whole-population comparison
This illustration changes the spacing to 13.4 km between centres, giving an edge gap of about 7.76 km, or 4.82 miles. It does not preserve the original ten-mile green gap and does not prove the largest feasible alternative gap.
