createListOfBboxes.js

const csvWriter = require('csv-write-stream')
const shapefile = require("shapefile");
const cover = require('@mapbox/tile-cover');
const fs = require('fs');

async function main() { 
    const shp = await shapefile.read('~/nz-imagery-surveys_wgs.shp');

    //console.log(shp)

    var limits = {
        min_zoom: 12,
        max_zoom: 13
    };

    const newShp = shp.features.find(feats => feats.properties.name == 'Gisborne 0.1m Urban Aerial Photos (2017-2018)')
    var tilesOut = cover.geojson(newShp.geometry, limits) //compare gizzy polygons to wgs poly options
    //console.log(tilesOut)

    tilesOut.features.forEach(function(wgsBbox){

        var name = newShp.properties.name
        var ulx = wgsBbox.geometry.coordinates[0][0][0]
        var uly = wgsBbox.geometry.coordinates[0][0][1]
        var lrx = wgsBbox.geometry.coordinates[0][2][0]
        var lry = wgsBbox.geometry.coordinates[0][2][1]

        console.log(newShp.properties.name)
        console.log(ulx)
        console.log(uly)
        console.log(lrx)
        console.log(lry)

        if (!fs.existsSync('out.csv')){
            writer = csvWriter({sendHeaders: false})
            writer.pipe(fs.createWriteStream('out.csv'))
            writer.write({filename: name, ulX: ulx, ulY: uly, lrX: lrx, lrY: lry})
            }
            else{
            writer = csvWriter({sendHeaders: false})
            writer.pipe(fs.createWriteStream('out.csv',{flags: 'a'}))
            writer.write({filename: name, ulX: ulx, ulY: uly, lrX: lrx, lrY: lry})   
            }
            writer.end()

    })
}

main().catch(e => console.error(e))