Pengumuman: Semua project nonkomersial yang terdaftar untuk menggunakan Earth Engine sebelum
15 April 2025 harus
memverifikasi kelayakan nonkomersial untuk mempertahankan akses Earth Engine.
ui.Map.getScale
Tetap teratur dengan koleksi
Simpan dan kategorikan konten berdasarkan preferensi Anda.
Menampilkan skala piksel perkiraan tampilan peta saat ini, dalam meter.
Penggunaan | Hasil |
---|
Map.getScale() | Number|String |
Argumen | Jenis | Detail |
---|
ini: ui.map | ui.Map | Instance ui.Map. |
Contoh
Code Editor (JavaScript)
// The default map in the Code Editor is a built-in ui.Map object called "Map".
// Let's refer to it as "defaultMap" for clarity.
var defaultMap = Map;
// ui.Map objects can be constructed. Here, a new map is declared.
var newMap = ui.Map({
center: {lat: 0, lon: 0, zoom: 1},
style: {position: 'bottom-right', width: '400px'}
});
// Add the newMap to the defaultMap.
defaultMap.add(newMap);
// You can set the viewport of a ui.Map to be centered on an object.
// Here, the defaultMap is centered on a point with a selected zoom level.
var geom = ee.Geometry.Point(-122.0841, 37.4223);
defaultMap.centerObject(geom, 18);
defaultMap.addLayer(geom, {color: 'orange'}, 'Googleplex');
// Map extent can be fetched using the ui.Map.getBounds method.
print('defaultMap bounds as a list',
defaultMap.getBounds());
print('defaultMap bounds as a dictionary',
ee.Dictionary.fromLists(['w', 's', 'e', 'n'], defaultMap.getBounds()));
print('defaultMap bounds as GeoJSON',
defaultMap.getBounds({asGeoJSON: true}));
// Map center point can be fetched using the ui.Map.getCenter method.
print('defaultMap center as a Point geometry', defaultMap.getCenter());
// Map zoom level can be fetched using the ui.Map.getZoom method.
print('defaultMap zoom level', defaultMap.getZoom());
// Map scale can be fetched using the ui.Map.getScale method.
print('defaultMap approximate pixel scale', defaultMap.getScale());
Kecuali dinyatakan lain, konten di halaman ini dilisensikan berdasarkan Lisensi Creative Commons Attribution 4.0, sedangkan contoh kode dilisensikan berdasarkan Lisensi Apache 2.0. Untuk mengetahui informasi selengkapnya, lihat Kebijakan Situs Google Developers. Java adalah merek dagang terdaftar dari Oracle dan/atau afiliasinya.
Terakhir diperbarui pada 2025-07-26 UTC.
[null,null,["Terakhir diperbarui pada 2025-07-26 UTC."],[[["\u003cp\u003e\u003ccode\u003eMap.getScale()\u003c/code\u003e returns the approximate pixel scale of the current map view in meters.\u003c/p\u003e\n"],["\u003cp\u003eThe scale represents the ground distance in meters that corresponds to one pixel on the map at the current zoom level.\u003c/p\u003e\n"],["\u003cp\u003eThis function can be used to estimate distances or sizes of features displayed on the map.\u003c/p\u003e\n"],["\u003cp\u003eIt's called on a \u003ccode\u003eui.Map\u003c/code\u003e object, such as the default \u003ccode\u003eMap\u003c/code\u003e in the Code Editor or a custom \u003ccode\u003eui.Map\u003c/code\u003e you create.\u003c/p\u003e\n"]]],["The core content describes retrieving the approximate pixel scale of a map view using `Map.getScale()`, which returns a number or string. The code demonstrates using this method on a `ui.Map` instance, named \"defaultMap\". It also showcases other map functionalities like creating a new map, centering it on a point, adding a layer, and fetching bounds, center, and zoom level. `Map.getScale()` is used to print the pixel scale.\n"],null,["# ui.Map.getScale\n\n\u003cbr /\u003e\n\nReturns the approximate pixel scale of the current map view, in meters.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|------------------|----------------|\n| Map.getScale`()` | Number\\|String |\n\n| Argument | Type | Details |\n|----------------|--------|----------------------|\n| this: `ui.map` | ui.Map | The ui.Map instance. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// The default map in the Code Editor is a built-in ui.Map object called \"Map\".\n// Let's refer to it as \"defaultMap\" for clarity.\nvar defaultMap = Map;\n\n// ui.Map objects can be constructed. Here, a new map is declared.\nvar newMap = ui.Map({\n center: {lat: 0, lon: 0, zoom: 1},\n style: {position: 'bottom-right', width: '400px'}\n});\n\n// Add the newMap to the defaultMap.\ndefaultMap.add(newMap);\n\n// You can set the viewport of a ui.Map to be centered on an object.\n// Here, the defaultMap is centered on a point with a selected zoom level.\nvar geom = ee.Geometry.Point(-122.0841, 37.4223);\ndefaultMap.centerObject(geom, 18);\ndefaultMap.addLayer(geom, {color: 'orange'}, 'Googleplex');\n\n// Map extent can be fetched using the ui.Map.getBounds method.\nprint('defaultMap bounds as a list',\n defaultMap.getBounds());\nprint('defaultMap bounds as a dictionary',\n ee.Dictionary.fromLists(['w', 's', 'e', 'n'], defaultMap.getBounds()));\nprint('defaultMap bounds as GeoJSON',\n defaultMap.getBounds({asGeoJSON: true}));\n\n// Map center point can be fetched using the ui.Map.getCenter method.\nprint('defaultMap center as a Point geometry', defaultMap.getCenter());\n\n// Map zoom level can be fetched using the ui.Map.getZoom method.\nprint('defaultMap zoom level', defaultMap.getZoom());\n\n// Map scale can be fetched using the ui.Map.getScale method.\nprint('defaultMap approximate pixel scale', defaultMap.getScale());\n```"]]