Created
July 14, 2016 18:19
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| var cover = require('tile-cover') | |
| var tilebelt = require('tilebelt') | |
| var turf = require('@turf/turf') | |
| var features = [ | |
| { | |
| "type": "Feature", | |
| "properties": {}, | |
| "geometry": { | |
| "type": "Point", | |
| "coordinates": [ | |
| 76.640625, | |
| 23.241346102386135 | |
| ] | |
| } | |
| }, | |
| { | |
| "type": "Feature", | |
| "properties": {}, | |
| "geometry": { | |
| "type": "Polygon", | |
| "coordinates": [ | |
| [ | |
| [ | |
| 75.498046875, | |
| 29.611670115197406 | |
| ], | |
| [ | |
| 75.498046875, | |
| 31.728167146023935 | |
| ], | |
| [ | |
| 78.92578124999999, | |
| 31.728167146023935 | |
| ], | |
| [ | |
| 78.92578124999999, | |
| 29.611670115197406 | |
| ], | |
| [ | |
| 75.498046875, | |
| 29.611670115197406 | |
| ] | |
| ] | |
| ] | |
| } | |
| }, | |
| { | |
| "type": "Feature", | |
| "properties": {}, | |
| "geometry": { | |
| "type": "LineString", | |
| "coordinates": [ | |
| [ | |
| 52.64648437499999, | |
| 33.87041555094183 | |
| ], | |
| [ | |
| 47.63671875, | |
| 28.613459424004414 | |
| ] | |
| ] | |
| } | |
| } | |
| ] | |
| // use a hashmap to keep tiles unique | |
| var tiles = {} | |
| features.forEach(function(feature){ | |
| for(var z = 4; z <= 14; z++) { | |
| var tiles = cover.tiles(feature.geometry, {min_zoom: z, max_zoom: z}) | |
| tiles.forEach(function(tile){ | |
| // convert tile to a string to use as a key | |
| tiles[tile.join('/')] = 1 | |
| }) | |
| } | |
| }) | |
| Object.keys(tiles).forEach(function(key){ | |
| // convert key back to a tile array | |
| var tile = key.split('/').map(Number) | |
| // convert tile to geojson geometry, then wrap in a geojson polygon feature | |
| var box = turf.polygon(tilebelt.tileToGeoJSON(tile).coordinates) | |
| console.log(JSON.stringify(box)) | |
| }) |
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