ee.Terrain.aspect

Calcula el aspecto en grados a partir de un DEM de terreno.

El gradiente local se calcula con los vecinos conectados por 4 de cada píxel, por lo que los valores faltantes se producirán alrededor de los bordes de una imagen.

Uso	Muestra
ee.Terrain.aspect(input)	Imagen

Argumento	Tipo	Detalles
input	Imagen	Imagen de elevación, en metros.

Ejemplos

Editor de código (JavaScript)

// A digital elevation model.
var dem = ee.Image('NASA/NASADEM_HGT/001').select('elevation');

// Calculate slope. Units are degrees, range is [0,90).
var slope = ee.Terrain.slope(dem);

// Calculate aspect. Units are degrees where 0=N, 90=E, 180=S, 270=W.
var aspect = ee.Terrain.aspect(dem);

// Display slope and aspect layers on the map.
Map.setCenter(-123.457, 47.815, 11);
Map.addLayer(slope, {min: 0, max: 89.99}, 'Slope');
Map.addLayer(aspect, {min: 0, max: 359.99}, 'Aspect');

// Use the ee.Terrain.products function to calculate slope, aspect, and
// hillshade simultaneously. The output bands are appended to the input image.
// Hillshade is calculated based on illumination azimuth=270, elevation=45.
var terrain = ee.Terrain.products(dem);
print('ee.Terrain.products bands', terrain.bandNames());
Map.addLayer(terrain.select('hillshade'), {min: 0, max: 255}, 'Hillshade');;

Configuración de Python

Consulta la página Entorno de Python para obtener información sobre la API de Python y el uso de geemap para el desarrollo interactivo.

import ee
import geemap.core as geemap

Colab (Python)

# A digital elevation model.
dem = ee.Image('NASA/NASADEM_HGT/001').select('elevation')

# Calculate slope. Units are degrees, range is [0,90).
slope = ee.Terrain.slope(dem)

# Calculate aspect. Units are degrees where 0=N, 90=E, 180=S, 270=W.
aspect = ee.Terrain.aspect(dem)

# Display slope and aspect layers on the map.
m = geemap.Map()
m.set_center(-123.457, 47.815, 11)
m.add_layer(slope, {'min': 0, 'max': 89.99}, 'Slope')
m.add_layer(aspect, {'min': 0, 'max': 359.99}, 'Aspect')

# Use the ee.Terrain.products function to calculate slope, aspect, and
# hillshade simultaneously. The output bands are appended to the input image.
# Hillshade is calculated based on illumination azimuth=270, elevation=45.
terrain = ee.Terrain.products(dem)
display('ee.Terrain.products bands', terrain.bandNames())
m.add_layer(terrain.select('hillshade'), {'min': 0, 'max': 255}, 'Hillshade')
m