ee.Image.changeProj

Ajuste la projection de l'image d'entrée, en déplaçant chaque pixel de son emplacement dans srcProj vers les mêmes coordonnées dans dstProj.

Utilisation	Renvoie
Image.changeProj(srcProj, dstProj)	Image

Argument	Type	Détails
ceci : input	Image
srcProj	Projection	Projection d'origine.
dstProj	Projection	La nouvelle projection.

Exemples

Éditeur de code (JavaScript)

// A DEM image object.
var img = ee.Image('MERIT/DEM/v1_0_3');

// Construct a projection object from a WKT string or EPSG code, for example,
// the Robinson projection (https://epsg.io/54030).
var proj = ee.Projection(
  'PROJCS["World_Robinson",' +
      'GEOGCS["GCS_WGS_1984",' +
          'DATUM["WGS_1984",' +
              'SPHEROID["WGS_1984",6378137,298.257223563]],' +
          'PRIMEM["Greenwich",0],' +
          'UNIT["Degree",0.017453292519943295]],' +
      'PROJECTION["Robinson"],' +
      'UNIT["Meter",1]]'
)
// Optionally adjust projection scale; stretch layer larger in this case.
.scale(0.9, 0.9);

// "Paint" the image in the desired projection onto the projection of
// the map canvas ('EPSG:3857').
var imgProj = img.changeProj(proj, 'EPSG:3857');

// Add an overlay image to the map to cover the default base layers.
Map.setCenter(0, 0, 2);
Map.addLayer(ee.Image(1), {palette: 'grey'}, 'Grey background', false);

// Add the projection-tweaked image to the map.
Map.addLayer(imgProj, {min: 0, max: 3000}, 'DEM in Robinson projection');

Configuration de Python

Consultez la page Environnement Python pour en savoir plus sur l'API Python et sur l'utilisation de geemap pour le développement interactif.

import ee
import geemap.core as geemap

Colab (Python)

# A DEM image object.
img = ee.Image('MERIT/DEM/v1_0_3')

# Construct a projection object from a WKT string or EPSG code, for example,
# the Robinson projection (https://epsg.io/54030).
proj = (
    ee.Projection(
        'PROJCS["World_Robinson",'
        + 'GEOGCS["GCS_WGS_1984",'
        + 'DATUM["WGS_1984",'
        + 'SPHEROID["WGS_1984",6378137,298.257223563]],'
        + 'PRIMEM["Greenwich",0],'
        + 'UNIT["Degree",0.017453292519943295]],'
        + 'PROJECTION["Robinson"],'
        + 'UNIT["Meter",1]]'
    )
    # Optionally adjust projection scale stretch layer larger in this case.
    .scale(0.9, 0.9)
)

# "Paint" the image in the desired projection onto the projection of
# the map canvas ('EPSG:3857').
img_proj = img.changeProj(proj, 'EPSG:3857')

# Add an overlay image to the map to cover the default base layers.
m = geemap.Map()
m.set_center(0, 0, 2)
m.add_layer(ee.Image(1), {'palette': 'grey'}, 'Grey background', False)

# Add the projection-tweaked image to the map.
m.add_layer(
    img_proj,
    {'min': 0, 'max': 3000},
    'DEM in Robinson projection',
)
m