@seasketch/geoprocessing/dist/src/dataproviders/flatgeobuf.js

Geoprocessing and reporting framework for SeaSketch 2.0

import { readFileSync } from "node:fs";
import { geojson } from "flatgeobuf";
import { takeAsync } from "flatgeobuf/lib/mjs/streams/utils.js";
import { deserialize } from "flatgeobuf/lib/mjs/geojson.js";
import { callWithRetry } from "../helpers/callWithRetry.js";
import "./fetchPolyfill.js";
export function fgBoundingBox(box) {
    return {
        minX: box[0],
        maxX: box[2],
        minY: box[1],
        maxY: box[3],
    };
}
/**
 * Fetch features from flatgeobuf at url that intersect with bounding box
 * Retries up to 3 times if fetch fails in error
 * @param url url of flatgeobuf file
 * @param bbox optional bounding box to fetch features that intersect with
 * @returns feature array
 * @deprecated Use `loadFgb` instead.
 */
export async function fgbFetchAll(url, box) {
    return loadFgb(url, box);
}
/**
 * Fetch features from flatgeobuf at url that intersect with bounding box
 * Retries up to 3 times if fetch fails in error
 * @param url url of flatgeobuf file
 * @param bbox optional bounding box to fetch features that intersect with
 * @returns feature array
 */
export async function loadFgb(url, bbox) {
    const fgBox = (() => {
        if (!bbox && !Array.isArray(bbox)) {
            return fgBoundingBox([-180, -90, 180, 90]); // fallback to entire world
        }
        else {
            return fgBoundingBox(bbox);
        }
    })();
    if (process.env.NODE_ENV !== "test")
        console.log("loadFgb", `url: ${url}`, `box: ${JSON.stringify(fgBox)}`);
    // deserialize + takeAsync will await all features to be fetched
    const takeFeatures = (url, fgBox) => takeAsync(deserialize(url, fgBox));
    // retry up to 3 times if SocketError
    const features = (await callWithRetry(takeFeatures, [url, fgBox], {
        ifErrorMsgContains: "fetch failed",
    }));
    if (!Array.isArray(features))
        throw new Error("Unexpected result from loadFgb");
    return features;
}
/**
 * Synchronously load a flatgeobuf file from disk.  Assumed to be in WGS84 EPSG:4326 projection
 * @param path path to flatgeobuf file
 * @returns feature collection of features from disk
 */
export function loadFgbFromDisk(path) {
    // Fetch all reef features and calculate total area
    const buffer = readFileSync(path);
    return geojson.deserialize(new Uint8Array(buffer));
}
//# sourceMappingURL=flatgeobuf.js.map