ee.FeatureCollection.merge

Führt zwei Sammlungen in einer zusammen. Das Ergebnis enthält alle Elemente, die in einer der beiden Sammlungen enthalten waren.

Elemente aus der ersten Sammlung haben IDs mit dem Präfix „1“ und Elemente aus der zweiten Sammlung haben IDs mit dem Präfix „2“.

NutzungAusgabe
FeatureCollection.merge(collection2)FeatureCollection
ArgumentTypDetails
So gehts: collection1FeatureCollectionDie erste Sammlung, die zusammengeführt werden soll.
collection2FeatureCollectionDie zweite Sammlung, die zusammengeführt werden soll.

Beispiele

Code-Editor (JavaScript)

// FeatureCollection of points representing forest cover.
var fcForest = ee.FeatureCollection([
  ee.Feature(ee.Geometry.Point([-122.248, 37.238]),
             {'id': 0, 'cover_class': 'forest'}),
  ee.Feature(ee.Geometry.Point([-122.204, 37.222]),
             {'id': 1, 'cover_class': 'forest'}),
  ee.Feature(ee.Geometry.Point([-122.110, 37.199]),
             {'id': 2, 'cover_class': 'forest'})
]);

// FeatureCollection of points representing urban cover.
var fcUrban = ee.FeatureCollection([
  ee.Feature(ee.Geometry.Point([-121.953, 37.372]),
             {'id': 0, 'cover_class': 'urban'}),
  ee.Feature(ee.Geometry.Point([-121.861, 37.308]),
             {'id': 1, 'cover_class': 'urban'}),
  ee.Feature(ee.Geometry.Point([-121.984, 37.372]),
             {'id': 2, 'cover_class': 'urban'})
]);

// Merge the two FeatureCollections into one.
var fcMerged = fcForest.merge(fcUrban);

// Display FeatureCollections on the map.
Map.setCenter(-122.034, 37.296, 11);
Map.addLayer(fcForest, {color: 'green'}, 'Forest points');
Map.addLayer(fcUrban, {color: 'grey'}, 'Urban points');
Map.addLayer(fcMerged, {color: 'yellow'}, 'Protected areas merged');

Python einrichten

Informationen zur Python API und zur Verwendung von geemap für die interaktive Entwicklung finden Sie auf der Seite Python-Umgebung.

import ee
import geemap.core as geemap

Colab (Python)

# FeatureCollection of points representing forest cover.
fc_forest = ee.FeatureCollection([
    ee.Feature(
        ee.Geometry.Point([-122.248, 37.238]),
        {
            'id': 0,
            'cover_class': 'forest',
            'id': 0,
            'cover_class': 'forest',
        },
    ),
    ee.Feature(
        ee.Geometry.Point([-122.204, 37.222]),
        {
            'id': 1,
            'cover_class': 'forest',
            'id': 1,
            'cover_class': 'forest',
        },
    ),
    ee.Feature(
        ee.Geometry.Point([-122.110, 37.199]),
        {
            'id': 2,
            'cover_class': 'forest',
            'id': 2,
            'cover_class': 'forest',
        },
    ),
])

# FeatureCollection of points representing urban cover.
fc_urban = ee.FeatureCollection([
    ee.Feature(
        ee.Geometry.Point([-121.953, 37.372]),
        {'id': 0, 'cover_class': 'urban', 'id': 0, 'cover_class': 'urban'},
    ),
    ee.Feature(
        ee.Geometry.Point([-121.861, 37.308]),
        {'id': 1, 'cover_class': 'urban', 'id': 1, 'cover_class': 'urban'},
    ),
    ee.Feature(
        ee.Geometry.Point([-121.984, 37.372]),
        {'id': 2, 'cover_class': 'urban', 'id': 2, 'cover_class': 'urban'},
    ),
])

# Merge the two FeatureCollections into one.
fc_merged = fc_forest.merge(fc_urban)

# Display FeatureCollections on the map.
m = geemap.Map()
m.set_center(-122.034, 37.296, 11)
m.add_layer(fc_forest, {'color': 'green'}, 'Forest points')
m.add_layer(fc_urban, {'color': 'grey'}, 'Urban points')
m.add_layer(fc_merged, {'color': 'yellow'}, 'Protected areas merged')
m