Reference · Markers on the globe
groupCellfunction
The size, in degrees, of the ground's cells that crowded places are gathered in, for an Earth drawn radius CSS pixels across: about PLACE_GROUP_PX on the screen, rounded up to a power of two so the
groups change at only a few zooms and stay put while the Earth turns. 0 (gather none) when a cell would be under 1/64 of a degree, about 1.7 km.
Import it
import { groupCell } from "@johnmorrisdotca/chikyu-earth/markers";
Definition
function groupCell(radius: number): number
Parameters
| Name | Type | Description |
|---|---|---|
radius | number | The Earth's radius on the screen, in CSS pixels. |
Returns
number
The cell's size in degrees, from 1/64 to 32, or 0.
Examples
import { groupCell } from "@johnmorrisdotca/chikyu-earth/markers";
console.log(groupCell(200), groupCell(1_000_000)); // 8 08 0What it prints (run when this page was built)