Skip to the content

Chikyu Earth地球

A line-drawn globe of the world's countries that turns at the Earth's own rate, with an optional realistic Earth from space and markers for any place.

Chikyu is the Japanese word 地球 for the Earth. About the name

Contents

Reference · The data door: hand the package your own maps of the Earth or orbit data as a source with its own licence and credit, and see whose data is on the screen

TileSourcetype

Data cut by place and by detail. Place and Detail are the package's own types. *

Import it

import type { TileSource } from "@johnmorrisdotca/chikyu-earth/door";

Definition

interface TileSource<Place, Detail, Tile> {
    kind: "tiles";
    info: SourceInfo;
    need(place: Place, detail: Detail): readonly string[];
    load(key: string, signal: AbortSignal): Promise<Tile>;
    bytes(tile: Tile): number;
}

Members

NameTypeDescription
kind"tiles"
infoSourceInfo
need(place: Place, detail: Detail): readonly string[]

The keys of the tiles a place needs at a detail. Pure: no fetching.

load(key: string, signal: AbortSignal): Promise<Tile>

Loads one tile. The source may use the network or not; it must stop when the signal aborts.

bytes(tile: Tile): number

The tile's size in memory, in bytes, for the budget.

Examples

import type { TileSource } from "./data-door.ts";

declare const info: import("./data-door.ts").SourceInfo;
const source: TileSource<string, number, Uint8Array> = {
  kind: "tiles",
  info,
  need: (place, detail) => [`${place}/${detail}`],
  load: async () => new Uint8Array(16),
  bytes: (tile) => tile.byteLength,
};

View sourceEdit on GitHubMade from the source of @johnmorrisdotca/chikyu-earth 0.51.1.