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Supervised classification
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}),
ee.Feature(
ee.Geometry.Point([-109.9348565312851, 27.43423838634914]),
{
"TC": 4,
"system:index": "2"
}),
ee.Feature(
ee.Geometry.Point([-109.93592941489106, 27.435457230634636]),
{
"TC": 4,
"system:index": "3"
}),
ee.Feature(
ee.Geometry.Point([-109.93659460272676, 27.43631422246357]),
{
"TC": 4,
"system:index": "4"
}),
ee.Feature(
ee.Geometry.Point([-109.93695938315278, 27.436599884927748]),
{
"TC": 4,
"system:index": "5"
}),
ee.Feature(
ee.Geometry.Point([-109.93710958685762, 27.435857160982938]),
{
"TC": 4,
"system:index": "6"
}),
ee.Feature(
ee.Geometry.Point([-109.93620836462861, 27.435476274969787]),
{
"TC": 4,
"system:index": "7"
}),
ee.Feature(
ee.Geometry.Point([-109.93560754980928, 27.434657365590475]),
{
"TC": 4,
"system:index": "8"
}),
ee.Feature(
ee.Geometry.Point([-109.9346204968918, 27.435495319301683]),
{
"TC": 4,
"system:index": "9"
}),
ee.Feature(
ee.Geometry.Point([-109.93442737784272, 27.43621900147785]),
{
"TC": 4,
"system:index": "10"
}),
ee.Feature(
ee.Geometry.Point([-109.93453466620332, 27.436999811135372]),
{
"TC": 4,
"system:index": "11"
}),
ee.Feature(
ee.Geometry.Point([-109.93539297308809, 27.43694267890873]),
{
"TC": 4,
"system:index": "12"
}),
ee.Feature(
ee.Geometry.Point([-109.93580066885835, 27.436447531705536]),
{
"TC": 4,
"system:index": "13"
}),
ee.Feature(
ee.Geometry.Point([-109.93560754980928, 27.43612378040999]),
{
"TC": 4,
"system:index": "14"
}),
ee.Feature(
ee.Geometry.Point([-109.93569338049775, 27.434181252693]),
{
"TC": 4,
"system:index": "15"
}),
ee.Feature(
ee.Geometry.Point([-109.93489944662934, 27.433762271644348]),
{
"TC": 4,
"system:index": "16"
}),
ee.Feature(
ee.Geometry.Point([-109.93455612387544, 27.433457557155453]),
{
"TC": 4,
"system:index": "17"
}),
ee.Feature(
ee.Geometry.Point([-109.93580066885835, 27.433800360896303]),
{
"TC": 4,
"system:index": "18"
}),
ee.Feature(
ee.Geometry.Point([-109.91471711235242, 27.435960337853356]),
{
"TC": 4,
"system:index": "19"
}),
ee.Feature(
ee.Geometry.Point([-109.91412702636914, 27.435360442348287]),
{
"TC": 4,
"system:index": "20"
}),
ee.Feature(
ee.Geometry.Point([-109.91354766922193, 27.43599842634679]),
{
"TC": 4,
"system:index": "21"
}),
ee.Feature(
ee.Geometry.Point([-109.91324726181226, 27.435750850904643]),
{
"TC": 4,
"system:index": "22"
}),
ee.Feature(
ee.Geometry.Point([-109.91432014541822, 27.43457009884803]),
{
"TC": 4,
"system:index": "23"
}),
ee.Feature(
ee.Geometry.Point([-109.91532865600782, 27.434693887962837]),
{
"TC": 4,
"system:index": "24"
}),
ee.Feature(
ee.Geometry.Point([-109.91568270759778, 27.434798632490004]),
{
"TC": 4,
"system:index": "25"
}),
ee.Feature(
ee.Geometry.Point([-109.91468492584424, 27.43579846160973]),
{
"TC": 4,
"system:index": "26"
}),
ee.Feature(
ee.Geometry.Point([-109.91531792717176, 27.436046036945054]),
{
"TC": 4,
"system:index": "27"
}),
ee.Feature(
ee.Geometry.Point([-109.91354766922193, 27.435255698354304]),
{
"TC": 4,
"system:index": "28"
}),
ee.Feature(
ee.Geometry.Point([-109.91325799064832, 27.43457962109257]),
{
"TC": 4,
"system:index": "29"
}),
ee.Feature(
ee.Geometry.Point([-109.9138480766316, 27.43600794846808]),
{
"TC": 4,
"system:index": "30"
}),
ee.Feature(
ee.Geometry.Point([-109.9148029430409, 27.43557945219633]),
{
"TC": 4,
"system:index": "31"
})]),
Cajeme = ee.FeatureCollection("users/juanalexis0407/Cajeme");
/***** End of imports. If edited, may not auto-convert in the playground. *****/
// Clasificacion supervisada sitios RSU
// Importacion de area de estudio
var Cajeme = ee.FeatureCollection("users/juanalexis0407/Cajeme");
// Importacion de librerias de imagenes
var Sentinel_2 = ee.ImageCollection('COPERNICUS/S2')
.filterDate('2020-11-28', '2020-12-07')
.filterBounds(Cajeme)
.filterMetadata('CLOUDY_PIXEL_PERCENTAGE', 'Less_Than', 10);
// Impresion del resultado de busqueda
print(Sentinel_2);
// Crear un mosaico con los resultados obtenidos
var Sentinel_Cajeme = Sentinel_2.mean().clip(Cajeme);
// Mostrar la vista satelital RGB en el mapa
Map.addLayer(Sentinel_Cajeme, {
min: 0.0,
max: 3000.0,
gamma: 1.0,
bands: ['B4', 'B3', 'B2']},
'Vista Satelital RGB');
// Seleccion de bandas a utilizar en la supervision
var bandas = ['B2', 'B3', 'B4', 'B5', 'B6', 'B7', 'B8', 'B11', 'B12'];
// Crear las clases a partir de los puntos
var clases = Ciudad.merge(Cultivos).merge(Cuerpo_de_agua).merge(Basurero);
print(clases);
// Creacion de areas o zonas de entrenamiento
var entrenamiento = Sentinel_Cajeme.select(bandas).sampleRegions({
collection: clases,
properties: ['TC'],
scale: 10
});
print(entrenamiento);
// crear clasificador de puntos
var entrenador_cart = ee.Classifier.cart();
var clasificador = entrenador_cart.train({
features: entrenamiento,
classProperty: 'TC',
inputProperties: bandas
});
var classify = Sentinel_Cajeme.classify(clasificador);
print(classify);
// añadir imagen clasificada al mapa
Map.addLayer(classify, {
palette: ['d63000', '98ff00', '0b4a8b', 'ffc82d'],
min: 1,
max: 4},
'Clasificacion Supervisada'
);
// NOTAS:
// La clasificacion supervisada realizada no parece satisfacer
// los resultados. Lo que se observa es que la clase de basurero
// presenta un comportamiento espectral similar al grupo ciudad.
// Algunas sombras producidas por montañas presentan comportamiento
// espectral similar al agua (zonas al este de cajeme), esto viene
// dado por la imagen satelital.
// Probablemente, con un mayor numero de puntos por clase (N > 30),
// podria realizarse una mejor clasificacion.
// La existencia de otros modelos de clasificacion de pixeles
// podria arrojar otros resultados.
// https://developers.google.com/earth-engine/guides/classification