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mergeNamedShapefilesToGeoJSON
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| //MAP THROUGH ALL FILES TO GET AN ARRAY OF SHAPEFILES TO CONVERT | |
| //MAP THROUGH EACH FILE TO GET FEATURES AND PUSH TO MASTER, ADD FILENAME AS TYPE AND COLLECT FIELDS | |
| //MAP THROUGH MASTER AND ADD MISSING FIELDS | |
| var fs = require("fs"); | |
| var shapefile = require("shapefile"); | |
| var converted = { | |
| type: "FeatureCollection", | |
| features: [] | |
| } | |
| var allFiles = fs.readdirSync("../Street Signs"); | |
| var shapeFiles = allFiles.filter(f => { | |
| return f.split(".")[1] === "shp" | |
| }) | |
| console.log("total shapefiles to convert", shapeFiles.length) | |
| //TESTING | |
| // var test = []; | |
| // test.push(shapeFiles[0]) | |
| // test.push(shapeFiles[1]) | |
| // console.log(test) | |
| // test.map(file => { | |
| // convert(file) | |
| // }) | |
| shapeFiles.map((file,i) => { | |
| var index = i + 1 | |
| convert(file, index, shapeFiles.length) | |
| }) | |
| var convertedCount = 0; | |
| function convert(file,index,length) { | |
| var signType = file.split(".")[0]; | |
| var propertiesArray = []; | |
| shapefile.open(file) | |
| .then(source => source.read() | |
| .then(function toGeoJSON(result) { | |
| if (result.done) { | |
| convertedCount = convertedCount + 1; | |
| console.log("converting", file, convertedCount, "of", length); | |
| var newProps = getProps(converted); | |
| newProps.map(p => { | |
| if (propertiesArray.indexOf(p) < 0) propertiesArray.push(p) | |
| }) | |
| converted.features.map(f => { | |
| propertiesArray.map(p => { | |
| if (!f.properties[p]) { | |
| f.properties[p] = null | |
| } | |
| }) | |
| }); | |
| if (convertedCount === length) { | |
| //APPLY ANY FINAL CONVERSIONS ON THE ENTIRE DATASET | |
| // converted.features.map(f => { | |
| // DO SOMETHING | |
| // }) | |
| fs.writeFileSync("_convertedGeoJSON.json", JSON.stringify(converted, 0, 2)) | |
| console.log("done!!") | |
| } | |
| return | |
| }; | |
| result.value.properties.signtype = signType; | |
| converted.features.push(result.value) | |
| // console.log(converted.features) | |
| return source.read().then(toGeoJSON); | |
| })) | |
| .catch(error => console.error(error.stack)); | |
| } | |
| function getProps(geojson) { | |
| var props = []; | |
| geojson.features.map(f => { | |
| for (var p in f.properties) { | |
| props.push(p) | |
| } | |
| }) | |
| return props | |
| } |
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