ee.Projection

傳回 Projection，其中包含指定的基礎座標系統，以及投影座標與基礎之間的指定轉換。如未指定轉換，系統會假設您使用的是身分轉換。

用量傳回
ee.Projection(crs, transform, transformWkt)預測值
引數類型詳細資料
crs物件這個投影的基準座標參考系統，以知名授權單位代碼的形式提供 (例如 「EPSG:4326」) 或 WKT 字串。
transform清單，預設值為空值投影座標與基本座標系統之間的轉換，以資料列主要順序指定為 2x3 仿射轉換矩陣：[xScale、xShearing、xTranslation、yShearing、yScale、yTranslation]。不得同時指定這個屬性和「transformWkt」。
transformWkt字串，預設值為空值投影座標與基本座標系統之間的轉換，以 WKT 字串形式指定。不得同時指定這個屬性和「transform」。

範例

程式碼編輯器 (JavaScript)

// Construct projections.
// Printing the projection will show the EPSG code if it is a direct match.
//
// e.g. You will see this for the string 'EPSG:3857'
//   type: Projection
//   crs: EPSG:3857
//   transform: [1,0,0,0,1,0]

print(ee.Projection('EPSG:3857'));  // https://epsg.io/3857
print(ee.Projection('EPSG:4326'));  // https://epsg.io/4326

// WKT projection description for https://epsg.io/27572
var proj = ee.Projection(
    'PROJCS["NTF (Paris) / Lambert zone II", ' +
    '  GEOGCS["NTF (Paris)", ' +
    '    DATUM["Nouvelle Triangulation Francaise (Paris)", ' +
    '      SPHEROID["Clarke 1880 (IGN)", 6378249.2, 293.4660212936269,'+
    '               AUTHORITY["EPSG","7011"]], ' +
    '      AUTHORITY["EPSG","6807"]], ' +
    '    PRIMEM["Paris", 2.5969213, AUTHORITY["EPSG","8903"]], ' +
    '    UNIT["grade", 0.015707963267948967], ' +
    '    AXIS["Geodetic longitude", EAST], ' +
    '    AXIS["Geodetic latitude", NORTH], ' +
    '    AUTHORITY["EPSG","4807"]], ' +
    '  PROJECTION["Lambert_Conformal_Conic_1SP", AUTHORITY["EPSG","9801"]], ' +
    '  PARAMETER["central_meridian", 0.0], ' +
    '  PARAMETER["latitude_of_origin", 52.0], ' +
    '  PARAMETER["scale_factor", 0.99987742], ' +
    '  PARAMETER["false_easting", 600000.0], ' +
    '  PARAMETER["false_northing", 2200000.0], ' +
    '  UNIT["m", 1.0], ' +
    '  AXIS["Easting", EAST], ' +
    '  AXIS["Northing", NORTH], ' +
    '  AUTHORITY["EPSG","27572"]]');
print(proj);  // crs: EPSG:27572

Python 設定

請參閱 Python 環境頁面，瞭解 Python API 和如何使用 geemap 進行互動式開發。

import ee
import geemap.core as geemap

Colab (Python)

# Construct projections.
# Printing the projection will show the EPSG code if it is a direct match.
#
# e.g. You will see this for the string 'EPSG:3857'
#   type: Projection
#   crs: EPSG:3857
#   transform: [1,0,0,0,1,0]

print(ee.Projection('EPSG:3857').getInfo())  # https://epsg.io/3857
print(ee.Projection('EPSG:4326').getInfo())  # https://epsg.io/4326

# WKT projection description for https://epsg.io/27572
proj = ee.Projection(
    'PROJCS["NTF (Paris) / Lambert zone II", ' +
    '  GEOGCS["NTF (Paris)", ' +
    '    DATUM["Nouvelle Triangulation Francaise (Paris)", ' +
    '      SPHEROID["Clarke 1880 (IGN)", 6378249.2, 293.4660212936269,'+
    '               AUTHORITY["EPSG","7011"]], ' +
    '      AUTHORITY["EPSG","6807"]], ' +
    '    PRIMEM["Paris", 2.5969213, AUTHORITY["EPSG","8903"]], ' +
    '    UNIT["grade", 0.015707963267948967], ' +
    '    AXIS["Geodetic longitude", EAST], ' +
    '    AXIS["Geodetic latitude", NORTH], ' +
    '    AUTHORITY["EPSG","4807"]], ' +
    '  PROJECTION["Lambert_Conformal_Conic_1SP", AUTHORITY["EPSG","9801"]], ' +
    '  PARAMETER["central_meridian", 0.0], ' +
    '  PARAMETER["latitude_of_origin", 52.0], ' +
    '  PARAMETER["scale_factor", 0.99987742], ' +
    '  PARAMETER["false_easting", 600000.0], ' +
    '  PARAMETER["false_northing", 2200000.0], ' +
    '  UNIT["m", 1.0], ' +
    '  AXIS["Easting", EAST], ' +
    '  AXIS["Northing", NORTH], ' +
    '  AUTHORITY["EPSG","27572"]]')
print(proj.getInfo())  # crs: EPSG:27572