112 lines
3 KiB
JavaScript
112 lines
3 KiB
JavaScript
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import VectorLayer from 'ol/layer/Vector';
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import {Vector as VectorSource} from 'ol/source.js';
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import GeoJSON from 'ol/format/GeoJSON.js';
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import {Style} from 'ol/style.js';
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import counties from './data/counties.js';
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// from https://www.nass.usda.gov/Research_and_Science/Crop-Sequence-Boundaries/metadata_Crop-Sequence-Boundaries-2023.htm
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const crops = {
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"1": "Corn",
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"2": "Cotton",
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"3": "Rice",
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"4": "Sorghum",
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"5": "Soybeans",
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"6": "Sunflower",
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"10": "Peanuts",
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"11": "Tobacco",
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"12": "Sweet Corn",
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"13": "Pop or Orn Corn",
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"14": "Mint",
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"21": "Barley",
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"22": "Durum Wheat",
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"23": "Spring Wheat",
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"24": "Winter Wheat",
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"25": "Other Small Grains",
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"26": "Dbl Crop WinWht/Soybeans",
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"27": "Rye",
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"28": "Oats",
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"29": "Millet",
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"30": "Speltz",
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"31": "Canola",
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"32": "Flaxseed",
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"33": "Safflower",
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"34": "Rape Seed",
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"35": "Mustard",
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"36": "Alfalfa",
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"37": "Other Hay/Non Alfalfa",
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"38": "Camelina",
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"39": "Buckwheat",
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"41": "Sugarbeets",
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"42": "Dry Beans",
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"43": "Potatoes",
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"44": "Other Crops",
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"45": "Sugarcane",
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"46": "Sweet Potatoes",
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"47": "Misc Vegs & Fruits",
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"48": "Watermelons",
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"49": "Onions",
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"50": "Cucumbers",
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"51": "Chick Peas",
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"52": "Lentils",
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"53": "Peas",
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"54": "Tomatoes",
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"55": "Caneberries",
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"56": "Hops",
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"57": "Herbs",
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"58": "Clover/Wildflowers",
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"59": "Sod/Grass Seed",
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"60": "Switchgrass",
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}
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const category = {
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name: "County Crop History",
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details: `<a href="https://www.nass.usda.gov/Research_and_Science/Crop-Sequence-Boundaries/index.php">https://www.nass.usda.gov/Research_and_Science/Crop-Sequence-Boundaries/index.php</a>`,
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layers: [],
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};
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for (let [county, url] of Object.entries(counties)) {
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const geojsonSource = new VectorSource({
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url: url,
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format: new GeoJSON,
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});
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geojsonSource.on('featuresloadend', function(event) {
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event.features.forEach(feature => {
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for (let year = 2016; year <= 2023; year++) {
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const cropid = feature.get(`CDL${year}`);
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// Check if the value exists in the key, then replace it
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if (cropid in crops) {
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feature.set(String(year), crops[cropid]);
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} else {
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feature.set(String(year), cropid);
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}
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feature.unset(`CDL${year}`);
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}
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});
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});
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const vectorLayer = new VectorLayer({
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source: geojsonSource,
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});
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category.layers.push({
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name: county,
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layer: vectorLayer,
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});
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}
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category.layers.sort(function (a, b) {
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const a_state = a.name.substr(a.length - 2);
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const b_state = a.name.substr(b.length - 2);
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// Sort by state...
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if (a_state != b_state) {
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return a_state > b_state ? 1 : -1;
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}
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// ...then by county
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return a.name > b.name ? 1 : -1;
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});
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export default category;
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