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Add MN crop history by county layer

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Chandler Swift 2024-11-11 23:04:36 -06:00
parent 5859795b3e
commit 6e28990290
Signed by: chandlerswift
GPG key ID: A851D929D52FB93F
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layers/crop-history/index.js Normal file
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import VectorLayer from 'ol/layer/Vector';
import {Vector as VectorSource} from 'ol/source.js';
import GeoJSON from 'ol/format/GeoJSON.js';
import {Style} from 'ol/style.js';
import counties from './data/counties.js';
// from https://www.nass.usda.gov/Research_and_Science/Crop-Sequence-Boundaries/metadata_Crop-Sequence-Boundaries-2023.htm
const crops = {
"1": "Corn",
"2": "Cotton",
"3": "Rice",
"4": "Sorghum",
"5": "Soybeans",
"6": "Sunflower",
"10": "Peanuts",
"11": "Tobacco",
"12": "Sweet Corn",
"13": "Pop or Orn Corn",
"14": "Mint",
"21": "Barley",
"22": "Durum Wheat",
"23": "Spring Wheat",
"24": "Winter Wheat",
"25": "Other Small Grains",
"26": "Dbl Crop WinWht/Soybeans",
"27": "Rye",
"28": "Oats",
"29": "Millet",
"30": "Speltz",
"31": "Canola",
"32": "Flaxseed",
"33": "Safflower",
"34": "Rape Seed",
"35": "Mustard",
"36": "Alfalfa",
"37": "Other Hay/Non Alfalfa",
"38": "Camelina",
"39": "Buckwheat",
"41": "Sugarbeets",
"42": "Dry Beans",
"43": "Potatoes",
"44": "Other Crops",
"45": "Sugarcane",
"46": "Sweet Potatoes",
"47": "Misc Vegs & Fruits",
"48": "Watermelons",
"49": "Onions",
"50": "Cucumbers",
"51": "Chick Peas",
"52": "Lentils",
"53": "Peas",
"54": "Tomatoes",
"55": "Caneberries",
"56": "Hops",
"57": "Herbs",
"58": "Clover/Wildflowers",
"59": "Sod/Grass Seed",
"60": "Switchgrass",
}
const category = {
name: "County Crop History",
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>`,
layers: [],
};
for (let [county, url] of Object.entries(counties)) {
const geojsonSource = new VectorSource({
url: url,
format: new GeoJSON,
});
geojsonSource.on('featuresloadend', function(event) {
event.features.forEach(feature => {
for (let year = 2016; year <= 2023; year++) {
const cropid = feature.get(`CDL${year}`);
// Check if the value exists in the key, then replace it
if (cropid in crops) {
feature.set(String(year), crops[cropid]);
} else {
feature.set(String(year), cropid);
}
feature.unset(`CDL${year}`);
}
});
});
const vectorLayer = new VectorLayer({
source: geojsonSource,
});
category.layers.push({
name: county,
layer: vectorLayer,
});
}
category.layers.sort(function (a, b) {
const a_state = a.name.substr(a.length - 2);
const b_state = a.name.substr(b.length - 2);
// Sort by state...
if (a_state != b_state) {
return a_state > b_state ? 1 : -1;
}
// ...then by county
return a.name > b.name ? 1 : -1;
});
export default category;