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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

loadRecordsfunction

Reads a record source once, when it is added: the list is frozen, a record with a non-finite number (a NaN or an infinity in any number finite names) is skipped and counted, and a list over MAX_RECORDS is refused whole (bigger data must be tiles). It never throws: a source that throws or rejects is a failed read, and a read the signal aborted is aborted.

Import it

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

Definition

function loadRecords<R>(source: RecordSource<R>, signal: AbortSignal, finite?: (record: R) => readonly number[]): Promise<RecordsRead<R>>

Parameters

NameTypeDescription
sourceRecordSource<R>

The record source.

signalAbortSignal

Aborts the read (the source is removed or switched off).

finite (optional)((record: R) => readonly number[]) | undefined

The numbers of one record that must be finite, if any: (star) => [star.ra, star.dec, star.mag].

Returns

Promise<RecordsRead<R>>

What was found: the status, the frozen records, how many were skipped and, for a failed read, why.

Examples

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

const read = await loadRecords(source, controller.signal, (star) => [star.ra, star.dec]); // read.records is frozen; read.skipped counts the NaNs

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