Calculating Area in Earth Engine

We try to learn to calculate area in #earthengine. We follow the blog from spatial thoughts. Please follow the links for more.
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earth engine tutorial: developers.goo...
blog: spatialthought...
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some practice:
checking the crop area and urban area in Nepal
/ 1569781629115322368
( codes in the pinned comment )

[@ksabmagar7]

// Some practice here:
var mod = ee.ImageCollection("MODIS/006/MCD12Q1")
var filtered = mod.map(function(img){
return img.select('LC_Type1').eq(12)
}).toBands()
// var arearesult = filtered.map(function(img){
var areaImage = filtered.multiply(ee.Image.pixelArea()).divide(1e6)
var areaAgri = areaImage.reduceRegion({
reducer: ee.Reducer.sum(),
geometry: npl.geometry(), //npl = nepal shape file
scale: 500,
maxPixels: 1e10
})
// print(areaAgri)
var chart = ui.Chart.array.values({
array: areaAgri.values(),
axis: 0,
xLabels: areaAgri.keys()
}).setChartType('LineChart')
.setOptions({
title: 'Crop Lands are rapidly decreasing in Nepal.',
// hAxis: {title: 'Years (2001-2020'},
vAxis: {title: 'Area (sq. km.)'},
legend: { position: "none" },
lineWidth: 1,
pointSize: 3
});
print(chart);
///////////////
///////////////////
var filtered = mod.map(function(img){
return img.select('LC_Type1').eq(13)
}).toBands()
// var arearesult = filtered.map(function(img){
var areaImage = filtered.multiply(ee.Image.pixelArea()).divide(1e6)
var areaUrban = areaImage.reduceRegion({
reducer: ee.Reducer.sum(),
geometry: npl.geometry(),
scale: 500,
maxPixels: 1e10
})
//print(areaUrban)

var chart = ui.Chart.array.values({
array: areaUrban.values(),
axis: 0,
xLabels: areaUrban.keys()
}).setChartType('LineChart')
.setOptions({
title: 'Urban Areas are in increasing trends in Nepal.',
//hAxis: {format:'short'},
vAxis: {title: 'Area (sq. km.)'},
legend: { position: "none" },
lineWidth: 1,
pointSize: 3
});
print(chart);

[@andersoncardoso8722]

Thank you very much!

[@21.harimadhavan17]

Thank very my for your explanation. Helpful to do my project. From India.

[@ksabmagar7]

Hello, thankyou for checking. Please follow the related blog for more. :)

[@21.harimadhavan17]

@@ksabmagar7 for sure 😃

[@JorgeRodriguez-mp1mt]

Thanks for sharing, by any chance have you already worked with Random forest trees and how to graph their importance variables?, Gretings from Mexico

[@zmshashmi420]

Can you plot random forest?

[@ksabmagar7]

There was one content earlier, hyperparameter tuning. You sure have checked that. One way is that. I have some basic knowledge I should say. We can check some books in R doing such things.

[@mrityunjoykumbhakar9661]

Thanks for uploading this.
Please upload Machine learning Approachs and gis many types models created in python

[@ksabmagar7]

Hope to learn more. Thanks for the comments.