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2025 年 4 月 15 日前註冊使用 Earth Engine 的非商業專案,都必須
驗證非商業用途資格,才能繼續存取 Earth Engine。
Expression
透過集合功能整理內容
你可以依據偏好儲存及分類內容。
指定任意類型的任意運算式。回應類型取決於使用該函式的環境。
JSON 表示法 |
{
"values": {
string: {
object (ValueNode )
},
...
},
"result": string
} |
欄位 |
values |
map (key: string, value: object (ValueNode ))
計算中的所有中間值。這些表單的有向圖必須是非循環圖。 這個物件中包含 "key": value 組合的清單,範例:{ "name": "wrench", "mass": "1.3kg", "count": "3" } 。
|
result |
string
「values」中的哪個 ValueNode 是運算的最終結果。
|
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上次更新時間:2025-07-26 (世界標準時間)。
[null,null,["上次更新時間:2025-07-26 (世界標準時間)。"],[[["\u003cp\u003eArbitrary expressions of any type are specified, with the context determining the response type.\u003c/p\u003e\n"],["\u003cp\u003eA JSON representation is used, including intermediate values within a directed acyclic graph and a final result.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003evalues\u003c/code\u003e field maps keys to ValueNodes, representing all intermediate values in the computation.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eresult\u003c/code\u003e field indicates which ValueNode in \u003ccode\u003evalues\u003c/code\u003e is the final result.\u003c/p\u003e\n"]]],["The core content describes a structure for representing arbitrary expressions and their computations. It uses a JSON format with two main components: `values` and `result`. `values` is a map of intermediate computations, where each key-value pair represents a step, and the graph formed by these computations must be acyclic. `result` specifies the `string` key within `values` that represents the final outcome of the computation. The type of the response is determined by the context.\n"],null,["# Expression\n\nSpecifies an arbitrary expression, of an arbitrary type. The context in which it is used determines the type of the response.\n\n| JSON representation |\n|--------------------------------------------------------------------------------------------------------------------------------------|\n| ``` { \"values\": { string: { object (/earth-engine/reference/rest/Shared.Types/ArrayValue#ValueNode) }, ... }, \"result\": string } ``` |\n\n| Fields ||\n|----------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|\n| `values` | `map (key: string, value: object (`[ValueNode](/earth-engine/reference/rest/Shared.Types/ArrayValue#ValueNode)`))` All intermediate values in the computation. The directed graph these form must be acyclic. An object containing a list of `\"key\": value` pairs. Example: `{ \"name\": \"wrench\", \"mass\": \"1.3kg\", \"count\": \"3\" }`. |\n| `result` | `string` Which of the ValueNodes in \"values\" is the final result of the computation. |"]]