🔍 图像搜索和排序

“图像搜索”允许 Mapflow 用户搜索其分析区域内的可用卫星图像。它由 Mapflow API 提供支持，通过我们的合作伙伴集成提供对全球卫星数据提供商的访问。

可用于搜索和（新！）订购的图像提供商：

• 历史图像（汇总并提供来自领先卫星运营商的卫星图像）

支持基于帐户的集成和搜索的图像提供商：

• ArcGIS 世界影像

参见

阅读有关如何将图像提供程序与 Mapflow 结合使用的更多信息。

重要

❗️ 您需要订阅“Mapflow Premium <https://mapflow.ai/pricing>”_才能订购商业数据提供商并运行分析。

在 Mapflow WEB 中使用图像搜索

要使用图像搜索数据开始处理，您必须：

1. 选择日期范围或特定日期；

2. 设置搜索参数（云、离最低点、AOI/场景交叉点）；

3. 应用提供商过滤器：

   • “马赛克”

   • “图像”

   • “对我可用”- 搜索结果将仅显示与您的帐户相关联的提供商。

图像提供商类型：

马赛克 - 图像底图（例如 ArcGIS 或全局马赛克）允许按日期和 AOI/场景交集搜索图像。

图像 - 卫星图像档案允许按多种标准搜索历史图像，包括云、离最低点和分辨率。

👉 对我可用 - 按连接到您帐户的提供商过滤结果，以使用 Mapflow 运行分析。

4. 单击“搜索图像”后，将出现一个包含搜索结果和图像足迹的表格：

5. 您可以对地图上的图像进行排序、启用或禁用，如果提供商支持此功能，还可以预览它们（在表格中选择图像后，预览将自动显示在地图上）；

6. 在最后一步，您需要通过在表中单击所需的图像来选择它，然后单击“保存”。现在您可以开始处理了！

警告

👆️️️️️️ 您只能使用可用的提供商（“对我可用”）开始处理。如果您尝试使用未连接到您的帐户的提供商提供的图像，您将看到相应的警告*“该提供商不适用于您的帐户，您需要更改计划”*。您需要订阅 Mapflow Premium 才能订购商业数据提供商。

NEW! Search your own imagery (My Imagery)

In addition to the global satellite data providers, the Imagery Search also looks through your own imagery: the images and mosaics you uploaded to My Imagery. You don't need to switch anywhere - your own data is searched automatically along with the external providers every time you click Search Imagery.

Your imagery → right in the search results!

To use it:

1. Draw or upload the AOI that covers your imagery (see 2.1.选择兴趣区).

2. Set the search parameters as usual and click Search Imagery.

3. In the results table, your own data is marked in the Source column:

   • 🖼️ My Image - a single image uploaded to a mosaic;

   • 🧩 My Mosaic - a whole mosaic (collection of images).

注解

Your uploaded imagery usually has no acquisition metadata (date, cloud cover, off-nadir angle, resolution). Such cells are shown as "-" in the table, and the Clouds / Off-Nadir / AOI/Scene intersection filters do not hide your own imagery even if you tighten them.

注解

Only the imagery with the Ready status is searchable. Images that are still uploading (In progress) or failed are not shown in the search results.

You can select a "My Image" / "My Mosaic" result, preview it on the map and start the processing from it exactly like from any other search result:

1. Click the row in the results table to select the image.

2. Click Save and proceed to the processing settings - the selected imagery will be used as the source for the processing.

Planned Search in Mapflow WEB

如果您对当前的搜索结果不满意，或者您希望获得新的图像更新而无需手动重复搜索，则此服务可以完成这项工作。

How to create a planned search

1. 从 GeoJSON 文件中绘制或上传感兴趣的区域，选择表中的全部或仅必要的区域。如果您的 GeoJSON 要素包含属性“名称”，则 AOI 名称将自动加载到表中。您还可以在编辑模式下手动指定 aoi 名称（AOI 菜单中的“编辑”按钮）。

小技巧

您分配的 AOI 名称将出现在有关为此区域找到的新图像的通知中。要直接转到该区域的结果，只需单击应用程序中的通知或电子邮件中的“查看搜索结果”按钮即可。

2. 设置所需的搜索条件并单击“搜索图像”

注解

如果您的搜索区域总面积超过 700 平方公里，当您单击“搜索图像”而不是立即搜索时，系统会提示您创建推迟的后台搜索。

3. 之后，将出现搜索结果，并且“另存为计划”按钮将可用

4. 当您点击它时，系统将提示您选择此搜索计划的名称

5. 创建后，搜索将在一段时间后完成，您可以使用“在地图上查看”按钮查看搜索结果

查看后台搜索结果

现在，Mapflow 中将启动后台搜索，新图像到达时您将收到通知。

搜索卡显示标签 |alert|找到的**新图像**。单击结果表中的图像将删除标签。

注解

查看结果的两个关键点：

• 打开搜索时，您将看到给定区域找到的**所有**结果

• 如果您的搜索由多个 AOI 组成，并且您对特定的 AOI 感兴趣，则可以在“上传 GeoJSON 或 GeoTIFF 文件...”部分中选择它们 → 现在，将仅显示所选 AOI 的结果。另外，您可以通过单击地图来选择/取消选择 AOI，结果表将自动更新。

Processings <> Planned Search

处理的启动方式与即时搜索 <imagery-search-web>` 相同：

• Open a planned search

• 选择所需的图像并单击“保存”

• 选择必要的参数并开始加工！

从搜索启动的所有处理都与其链接。您可以在搜索的 AOI 表中找到它们。只需在地图上选择需要的，它们就会全部显示在一张地图上。

您可以通过搜索 AOI 表中的处理来执行一些操作：

• 在新选项卡中打开此处理

• 下载处理边界

• 将搜索 AOI 剪辑到其处理的边界（“停止此区域”按钮）

如果您已经对 AOI 的处理部分感到满意​​并且不想在搜索结果中看到它（修剪后的部分将不再在后台搜索中使用），那么最后一个可能会很有用。

Main operations with Planned Search

• 来源详细信息 - 在这里您可以查看和下载搜索的几何形状

• 全部标记为已查看 - 如果您有大量未读图像，您可以将它们一次性标记为已查看

• 设置活动直到 - 您可以更改后台搜索的生命周期（创建时默认为 6 个月）

过期后，搜索不会被删除，而是暂停

• 暂停/恢复搜索 - 暂停意味着它将停止后台搜索，但您仍然可以查看其结果

• 删除 - 永久删除搜索

修改 AOI 搜索

您可以将新的 AOI 添加到现有搜索、修改几何图形或删除已处理的区域。任何 AOI 更改后，您需要确认这些更改。搜索将更新，结果将相应同步。

您还可以更改现有搜索的搜索条件：

“在地图上查看”→调整搜索参数→“搜索图像”→“另存为计划”。现在后台搜索将根据新参数进行工作。

在 QGIS 中使用 Mapflow 图像搜索

1. 切换到“图像搜索”选项卡。要开始搜索，请设置日期和产品类型过滤器（“马赛克”- 影像底图，如 ArcGIS 或全球马赛克和/或“图像”- 卫星影像档案）

2. 设置额外的过滤器，例如与分析区域的最小交集。

3. 如果有非空响应，它将添加 🔎 Imagery Search 元数据 图层到您的 QGIS 项目。您可以在表中选择一个或多个结果 - 或使用图层的属性表开始使用 Mapflow 模型进行分析和处理。

提示

在 Arcgis 搜索结果中，您可以看到您所在区域的马赛克可用的缩放级别。您可以在“设置”中配置表格列。

参见

👉 有关如何在 Mapflow Web 和 QGIS 插件中使用图像搜索的更多信息，请参阅:ref:Mapflow <> QGIS。

Planned Search in QGIS

Planned Search is a recurring background search. You define the search area and parameters once, and Mapflow keeps looking for new imagery over that area - you will be notified when new images are found. The search runs in the background, so you can keep working with the plugin in the meantime, review the results at any time and start processing directly from them.

Creating a planned search

1. Switch to the Imagery Search tab and set the area of interest: draw it on the map or select an existing polygon layer (for example, a GeoJSON file loaded into QGIS). If the layer has a name attribute, it will be used as the AOI name. AOI names can also be assigned or changed later.

2. Set the search parameters: date range, cloud cover, off-nadir angle, minimum intersection, product types and providers.

3. Specify the search name in the Processing name field.

4. Open the Search button menu and choose Plan search.

The planned search is created and starts running in the background. It will keep looking for new imagery over the selected areas, and you will be notified when results are ready.

The planned search appears in the Processing table with the workflow "Planned". Its status reflects the search state:

• Searching – the initial search is in progress;

• Created / Updated – the search is active and being checked for new imagery (the number of new images, e.g. Updated (3), is shown when there are any);

• Inactive – the search is paused;

• Failed – the search failed and can be restarted.

注解

If the area of interest is too large for an immediate search, clicking Search will prompt you to create a planned search instead - the search area would take too long to process synchronously. Confirm with Plan Search, and the planned search will be created and run in the background.

Opening a planned search

Select the planned search in the Processing table and click the navigation button (or double-click the row). The plugin enters the planned search view: the table now shows the search AOIs, each followed by the processings that were launched for it, and the "No AOI" group for processings not linked to any area.

The AOI rows show the aggregate status of their processings (OK (n), In progress, Failed). On the map, the planned search is displayed in a dedicated group in the Layers panel — each AOI and its processings are grouped together, and processings not tied to any AOI appear on the map when you click them.

Viewing the search results

Open the planned search and switch to the Imagery Search tab. The table shows the images found for all AOIs of the planned search. To display results only for specific areas, select the corresponding AOI rows in the processings table - the results are updated automatically.

New images are marked with the (!) sign. You can mark the selected new images as seen with the Seen button, or mark all of them with Seen all - the label will disappear.

You can also adjust the search criteria of the existing planned search: change the filters (dates, cloud cover, off-nadir angle, intersection, providers) on the Imagery Search tab and click Update search — the new parameters are saved to the planned search, and the results are re-fetched with them. The results can be sorted by clicking the column headers.

Running processing from the search results

Select one or several images in the results table and click Start planned processing - the processing will be launched from the selected imagery, linked to this planned search. The new processing appears in the processings table grouped under the AOI it intersects, and its footprint is displayed on the map.

Managing the search AOIs

Select an AOI row and open the options menu (the "..." button next to View results):

• Rename AOI – assign a new name to the area;

• Delete AOI – remove the area from the search;

• Add AOI from layer… – add new areas from polygon layers in your QGIS project (for example, a GeoJSON file);

• Draw AOI on the map – draw a new area with the QGIS add-feature tool and save it;

• Update selected AOI – edit the geometry of the area right on the map (move the vertices, then click Save AOI);

• Exclude from search – remove the already processed area from the search AOI (available on a processing row): the footprint of the processing is subtracted from every AOI it intersects, so this area will no longer be searched for new imagery.

After any AOI change the search is updated, and the search results are synchronized accordingly. Take a look at AOI management in action:

注解

Exclude from search is a convenient way to gradually free up the search from already processed areas whose search results you no longer need.

Pausing, resuming and restarting a planned search

Select the planned search in the Processing table and open the options menu:

• Pause – stops the background search: no more updates on newly found images, but the search results remain available and you can still run processing from them;

• Resume – activates the paused search again;

• Restart – re-runs the search that failed.

Planned search limits

• If the search area is too large for an immediate search, you will be prompted to create a planned search automatically (see above).

• On the free plan you cannot create a planned search larger than 1000 km².

• On the free plan you can have up to 2 active planned searches. If you exceed this limit, new searches can still be created, but they will be added in a paused state. Upgrade your plan to resume them and create new active searches.