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ee.Projection
使用集合让一切井井有条
根据您的偏好保存内容并对其进行分类。
返回具有给定基本坐标系和投影坐标与基本坐标之间给定转换的投影。如果未指定任何转换，则假定为恒等转换。
| 用法 | 返回 |
|---|
ee.Projection(crs, transform, transformWkt) | 投影 |
| 参数 | 类型 | 详细信息 |
|---|
crs | 对象 | 相应投影的基本坐标参考系，以知名权威机构代码（例如 'EPSG:4326') 或 WKT 字符串。 |
transform | 列表，默认值：null | 投影坐标与基本坐标系之间的转换，以行优先顺序指定为 2x3 仿射转换矩阵：[xScale, xShearing, xTranslation, yShearing, yScale, yTranslation]。不得同时指定此参数和“transformWkt”。 |
transformWkt | 字符串，默认值：null | 投影坐标与基本坐标系之间的转换，以 WKT 字符串形式指定。不得同时指定此属性和“transform”属性。 |
示例
代码编辑器 (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 设置
如需了解 Python API 和如何使用 geemap 进行交互式开发，请参阅
Python 环境页面。
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
如未另行说明，那么本页面中的内容已根据知识共享署名 4.0 许可获得了许可，并且代码示例已根据 Apache 2.0 许可获得了许可。有关详情，请参阅 Google 开发者网站政策。Java 是 Oracle 和/或其关联公司的注册商标。
最后更新时间 (UTC)：2025-07-26。
[null,null,["最后更新时间 (UTC)：2025-07-26。"],[[["\u003cp\u003e\u003ccode\u003eee.Projection\u003c/code\u003e returns a Projection object with a defined base coordinate system and an optional transform.\u003c/p\u003e\n"],["\u003cp\u003eThe base coordinate system (\u003ccode\u003ecrs\u003c/code\u003e) can be specified using an authority code (e.g., 'EPSG:4326') or a WKT string.\u003c/p\u003e\n"],["\u003cp\u003eThe transform between projected and base coordinates can be defined by a 2x3 affine transform matrix (\u003ccode\u003etransform\u003c/code\u003e) or a WKT string (\u003ccode\u003etransformWkt\u003c/code\u003e).\u003c/p\u003e\n"],["\u003cp\u003eIf no transform is provided, the identity transform is used, implying a direct mapping between projected and base coordinates.\u003c/p\u003e\n"]]],[],null,["# ee.Projection\n\nReturns a Projection with the given base coordinate system and the given transform between projected coordinates and the base. If no transform is specified, the identity transform is assumed.\n\n\u003cbr /\u003e\n\n| Usage | Returns |\n|--------------------------------------------------------|------------|\n| `ee.Projection(crs, `*transform* `, `*transformWkt*`)` | Projection |\n\n| Argument | Type | Details |\n|----------------|-----------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `crs` | Object | The base coordinate reference system of this Projection, given as a well-known authority code (e.g., 'EPSG:4326') or a WKT string. |\n| `transform` | List, default: null | The transform between projected coordinates and the base coordinate system, specified as a 2x3 affine transform matrix in row-major order: \\[xScale, xShearing, xTranslation, yShearing, yScale, yTranslation\\]. May not specify both this and 'transformWkt'. |\n| `transformWkt` | String, default: null | The transform between projected coordinates and the base coordinate system, specified as a WKT string. May not specify both this and 'transform'. |\n\nExamples\n--------\n\n### Code Editor (JavaScript)\n\n```javascript\n// Construct projections.\n// Printing the projection will show the EPSG code if it is a direct match.\n//\n// e.g. You will see this for the string 'EPSG:3857'\n// type: Projection\n// crs: EPSG:3857\n// transform: [1,0,0,0,1,0]\n\nprint(ee.Projection('EPSG:3857')); // https://epsg.io/3857\nprint(ee.Projection('EPSG:4326')); // https://epsg.io/4326\n\n// WKT projection description for https://epsg.io/27572\nvar proj = ee.Projection(\n 'PROJCS[\"NTF (Paris) / Lambert zone II\", ' +\n ' GEOGCS[\"NTF (Paris)\", ' +\n ' DATUM[\"Nouvelle Triangulation Francaise (Paris)\", ' +\n ' SPHEROID[\"Clarke 1880 (IGN)\", 6378249.2, 293.4660212936269,'+\n ' AUTHORITY[\"EPSG\",\"7011\"]], ' +\n ' AUTHORITY[\"EPSG\",\"6807\"]], ' +\n ' PRIMEM[\"Paris\", 2.5969213, AUTHORITY[\"EPSG\",\"8903\"]], ' +\n ' UNIT[\"grade\", 0.015707963267948967], ' +\n ' AXIS[\"Geodetic longitude\", EAST], ' +\n ' AXIS[\"Geodetic latitude\", NORTH], ' +\n ' AUTHORITY[\"EPSG\",\"4807\"]], ' +\n ' PROJECTION[\"Lambert_Conformal_Conic_1SP\", AUTHORITY[\"EPSG\",\"9801\"]], ' +\n ' PARAMETER[\"central_meridian\", 0.0], ' +\n ' PARAMETER[\"latitude_of_origin\", 52.0], ' +\n ' PARAMETER[\"scale_factor\", 0.99987742], ' +\n ' PARAMETER[\"false_easting\", 600000.0], ' +\n ' PARAMETER[\"false_northing\", 2200000.0], ' +\n ' UNIT[\"m\", 1.0], ' +\n ' AXIS[\"Easting\", EAST], ' +\n ' AXIS[\"Northing\", NORTH], ' +\n ' AUTHORITY[\"EPSG\",\"27572\"]]');\nprint(proj); // crs: EPSG:27572\n```\nPython setup\n\nSee the [Python Environment](/earth-engine/guides/python_install) page for information on the Python API and using\n`geemap` for interactive development. \n\n```python\nimport ee\nimport geemap.core as geemap\n```\n\n### Colab (Python)\n\n```python\n# Construct projections.\n# Printing the projection will show the EPSG code if it is a direct match.\n#\n# e.g. You will see this for the string 'EPSG:3857'\n# type: Projection\n# crs: EPSG:3857\n# transform: [1,0,0,0,1,0]\n\nprint(ee.Projection('EPSG:3857').getInfo()) # https://epsg.io/3857\nprint(ee.Projection('EPSG:4326').getInfo()) # https://epsg.io/4326\n\n# WKT projection description for https://epsg.io/27572\nproj = ee.Projection(\n 'PROJCS[\"NTF (Paris) / Lambert zone II\", ' +\n ' GEOGCS[\"NTF (Paris)\", ' +\n ' DATUM[\"Nouvelle Triangulation Francaise (Paris)\", ' +\n ' SPHEROID[\"Clarke 1880 (IGN)\", 6378249.2, 293.4660212936269,'+\n ' AUTHORITY[\"EPSG\",\"7011\"]], ' +\n ' AUTHORITY[\"EPSG\",\"6807\"]], ' +\n ' PRIMEM[\"Paris\", 2.5969213, AUTHORITY[\"EPSG\",\"8903\"]], ' +\n ' UNIT[\"grade\", 0.015707963267948967], ' +\n ' AXIS[\"Geodetic longitude\", EAST], ' +\n ' AXIS[\"Geodetic latitude\", NORTH], ' +\n ' AUTHORITY[\"EPSG\",\"4807\"]], ' +\n ' PROJECTION[\"Lambert_Conformal_Conic_1SP\", AUTHORITY[\"EPSG\",\"9801\"]], ' +\n ' PARAMETER[\"central_meridian\", 0.0], ' +\n ' PARAMETER[\"latitude_of_origin\", 52.0], ' +\n ' PARAMETER[\"scale_factor\", 0.99987742], ' +\n ' PARAMETER[\"false_easting\", 600000.0], ' +\n ' PARAMETER[\"false_northing\", 2200000.0], ' +\n ' UNIT[\"m\", 1.0], ' +\n ' AXIS[\"Easting\", EAST], ' +\n ' AXIS[\"Northing\", NORTH], ' +\n ' AUTHORITY[\"EPSG\",\"27572\"]]')\nprint(proj.getInfo()) # crs: EPSG:27572\n```"]]
