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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 | import { ArkErrors, type } from 'arktype';
const NominatimResponseSchemas = {
Reverse: type({
name: 'string',
display_name: 'string'
}),
Forward: type({
name: 'string',
display_name: 'string',
lat: 'string.numeric.parse',
lon: 'string.numeric.parse'
}).array()
};
/**
* @see https://nominatim.org/release-docs/develop/api/Reverse/
* @param param0 coordinates
*/
export async function coordinatesToAddress({
latitude,
longitude
}: {
latitude: number;
longitude: number;
}): Promise<string | null> {
const response = await fetch(
`https://nominatim.openstreetmap.org/reverse?${new URLSearchParams({
format: 'jsonv2',
lat: latitude.toString(),
lon: longitude.toString(),
addressdetails: '0'
})}`
);
const data = NominatimResponseSchemas.Reverse(await response.json());
if (data instanceof ArkErrors) {
console.warn(
`Failed to reverse-geocode lon=${longitude}, lat=${latitude} with Nominatim:`,
response
);
return null;
}
return data.display_name;
}
let coordinatesSuggestionAbortController = new AbortController();
/**
*
* @see https://nominatim.org/release-docs/develop/api/Search/
*/
export async function suggestCoordinates(query: string): Promise<
Array<{
latitude: number;
longitude: number;
label: string;
key: string;
}>
> {
coordinatesSuggestionAbortController.abort();
coordinatesSuggestionAbortController = new AbortController();
const response = await fetch(
`https://nominatim.openstreetmap.org/search?${new URLSearchParams({
format: 'jsonv2',
q: query,
limit: '5'
})}`,
{
signal: coordinatesSuggestionAbortController.signal
}
);
const data = NominatimResponseSchemas.Forward(await response.json());
if (data instanceof ArkErrors) {
console.warn(`Failed to geocoe "${query}" with Nominatim:`, response);
return [];
}
return data.map(({ display_name, lat, lon }) => ({
key: `${lon};${lat}`,
label: display_name,
latitude: lat,
longitude: lon
}));
}
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