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Method: projects.table.computeFeatures
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。
通过对一个或多个表中的特征应用任意计算来计算一组特征。结果将作为 GeoJSON 地图项对象的列表返回。
HTTP 请求
POST https://earthengine.googleapis.com/v1alpha/{project=projects/*}/table:computeFeatures
网址采用 gRPC 转码语法。
路径参数
| 参数 |
project |
string
应被视为此请求的服务使用方的 Google Cloud Platform 项目的项目 ID 或项目编号。格式为 projects/{project-id}。
必须对指定的资源 project 具有以下 IAM 权限才能进行授权：
earthengine.computations.create
|
请求正文
请求正文中包含结构如下的数据：
| JSON 表示法 |
{
"expression": {
object (Expression)
},
"pageSize": integer,
"pageToken": string,
"workloadTag": string
} |
| 字段 |
expression |
object (Expression)
要计算的表达式。
|
pageSize |
integer
每页的结果数上限。服务器返回的特征数量可能少于请求的数量。如果未指定，则默认每页显示 1, 000 条结果。
|
pageToken |
string
标识服务器应返回的结果页面的令牌。 通常，这是上次调用 table.computeFeatures 方法返回的 ComputeFeaturesResponse.next_page_token 值。
|
workloadTag |
string
用户提供的用于跟踪此计算的代码。
|
响应正文
EarthEngineService.ComputeFeatures 的响应消息。
如果成功，响应正文将包含结构如下的数据：
| JSON 表示法 |
{
"type": string,
"features": [
{
object (Feature)
}
],
"nextPageToken": string
} |
| 字段 |
type |
string
始终包含常量字符串“FeatureCollection”，将其标记为 GeoJSON FeatureCollection 对象。
|
features[] |
object (Feature)
与查询匹配的地图项列表，以 GeoJSON 地图项对象（请参阅 RFC 7946）的列表形式提供，其中名为“type”的字段包含字符串“Feature”，名为“geometry”的字段包含几何图形，名为“properties”的字段包含键值对属性。
|
nextPageToken |
string
用于检索下一页结果的令牌。在对 table.computeFeatures 方法的后续调用中，将此值传入 ComputeFeaturesRequest.page_token 字段，以检索下一页结果。
|
授权范围
需要以下 OAuth 范围之一：
https://www.googleapis.com/auth/earthengine
https://www.googleapis.com/auth/earthengine.readonly
https://www.googleapis.com/auth/cloud-platform
https://www.googleapis.com/auth/cloud-platform.read-only
如需了解详情，请参阅 OAuth 2.0 Overview。
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)：2025-07-25。
[null,null,["最后更新时间 (UTC)：2025-07-25。"],[[["\u003cp\u003eComputes a set of features by applying a computation to features in one or more tables, returning results as a list of GeoJSON feature objects.\u003c/p\u003e\n"],["\u003cp\u003eThe computation is defined by an expression provided in the request body, along with optional parameters for pagination and workload tracking.\u003c/p\u003e\n"],["\u003cp\u003eResults are returned as a GeoJSON FeatureCollection, containing a list of features with their geometry and properties.\u003c/p\u003e\n"],["\u003cp\u003eThe request requires appropriate authorization using OAuth scopes for Earth Engine or Google Cloud Platform.\u003c/p\u003e\n"]]],[],null,["# Method: projects.table.computeFeatures\n\nComputes a set of features by applying an arbitrary computation to features in one or more tables. Results are returned as a list of GeoJSON feature objects.\n\n### HTTP request\n\n`POST https://earthengine.googleapis.com/v1alpha/{project=projects/*}/table:computeFeatures`\n\nThe URL uses [gRPC Transcoding](https://google.aip.dev/127) syntax.\n\n### Path parameters\n\n| Parameters ||\n|-----------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `project` | `string` The project id or project number of the Google Cloud Platform project that should be treated as the service consumer for this request. Format is `projects/{project-id}`. Authorization requires the following [IAM](https://cloud.google.com/iam/docs/) permission on the specified resource `project`: - `earthengine.computations.create` |\n\n### Request body\n\nThe request body contains data with the following structure:\n\n| JSON representation |\n|---------------------------------------------------------------------------------------------------------------------------------------------------------|\n| ``` { \"expression\": { object (/earth-engine/reference/rest/v1alpha/Expression) }, \"pageSize\": integer, \"pageToken\": string, \"workloadTag\": string } ``` |\n\n| Fields ||\n|---------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `expression` | `object (`[Expression](/earth-engine/reference/rest/v1alpha/Expression)`)` The expression to compute. |\n| `pageSize` | `integer` The maximum number of results per page. The server may return fewer features than requested. If unspecified, the page size default is 1000 results per page. |\n| `pageToken` | `string` A token identifying a page of results the server should return. Typically, this is the value of [ComputeFeaturesResponse.next_page_token](/earth-engine/reference/rest/v1alpha/projects.table/computeFeatures#body.ComputeFeaturesResponse.FIELDS.next_page_token) returned from the previous call to the `table.computeFeatures` method. |\n| `workloadTag` | `string` User supplied tag to track this computation. |\n\n### Response body\n\nResponse message for EarthEngineService.ComputeFeatures.\n\nIf successful, the response body contains data with the following structure:\n\n| JSON representation |\n|--------------------------------------------------------------------------------------------------------------------------------|\n| ``` { \"type\": string, \"features\": [ { object (/earth-engine/reference/rest/v1alpha/Feature) } ], \"nextPageToken\": string } ``` |\n\n| Fields ||\n|-----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `type` | `string` Always contains the constant string \"FeatureCollection\", marking this as a GeoJSON FeatureCollection object. |\n| `features[]` | `object (`[Feature](/earth-engine/reference/rest/v1alpha/Feature)`)` The list of features matching the query, as a list of GeoJSON feature objects (see RFC 7946) containing the string \"Feature\" in a field named \"type\", the geometry in a field named \"geometry\", and key/value properties in a field named \"properties\". |\n| `nextPageToken` | `string` A token to retrieve the next page of results. Pass this value in the [ComputeFeaturesRequest.page_token](/earth-engine/reference/rest/v1alpha/projects.table/computeFeatures#body.request_body.FIELDS.page_token) field in the subsequent call to the `table.computeFeatures` method to retrieve the next page of results. |\n\n### Authorization scopes\n\nRequires one of the following OAuth scopes:\n\n- `https://www.googleapis.com/auth/earthengine`\n- `\n https://www.googleapis.com/auth/earthengine.readonly`\n- `\n https://www.googleapis.com/auth/cloud-platform`\n- `\n https://www.googleapis.com/auth/cloud-platform.read-only`\n\nFor more information, see the [OAuth 2.0 Overview](/identity/protocols/OAuth2)."]]
