Querying Features: Understanding Feature Information

To query a feature in 2D or 3D view mode, click the Select tool, then click on a location in theView窗口。To select more than one feature, click and hold the left mouse button, then drag the cursor around the desired area.

Note:Selecting features in 3D mode works in a slightly different way: when you click on a feature in 3D, the tool will select all the features along an imaginary line that goes straight through the View window. In other words, it will also select all the features located directly behind the one that you click on.

Information about the feature(s) displays in theFeature Information窗口。

If multiple features are selected, the feature whose information is currently displayed in the Feature Information window is highlighted.

Clicking the arrow beside a section name expands/collapses the information in that section.

Raster datasetsdisplay additional information that includes row/column, location, band and palette properties, and palette keys and values.

Mousing-over grayed-out text provides summary information without having to expand a section.

Viewing Large Values

Some attribute values may be truncated because they are too large to display in the Feature Information window. Double-click on any value to display it in full in a separate window. There are several display and search options at the bottom of the Value window. Mouse over each option to display its description.

选择功能（右上角）

Displays the number of features that have been queried in the View window.

You can use the arrows to scroll through these features or enter a number into the text box to view information for a particular feature. You can also use the Up arrow key on the keyboard to increase the text box number, and the Down arrow key to decrease the text box number.

Saving Data

You can use standard operating system functions to select any entries in the Feature Information window, contiguous or non-contiguous. After selecting, right-click and selectCopy TextorCopy Text With Indentation. Copied text can then be pasted into a separate application.

Copy Text：复制所选文本，不包括任何空格字符。

Copy Text With Indentation: Copies selected text, including any whitespace characters. Use this option when you want to attempt to preserve indentations or columns when pasting into a spreadsheet.

Alternatively, you can output all the data about a feature in the Feature Information window to theLogwindow, then save to a text file. Click anywhere in the Feature Information window, and selectLog This Feature.

Property

功能类型：显示当前所选功能的功能类型。

Coordinate System: Displays the coordinate system of the selected feature, orUnknownif the format does not support coordinate systems. Click the link to display detailed information about the coordinate system:

This area also contains information about whether the feature is 2D or 3D, the number of vertices in the feature, and minimum and maximum bounding box values of the selected area.

Attributes

This section displays all the attributes and attribute values of the currently selected feature.

此窗口中显示的属性类型是：

• 用户属性 - 属于特征的用户创建的信息

• FME attributes – these attributes start withfme_and define the feature within FME
• Format attributes – these attributes define the feature within the source format

For more information on attribute types, open FME Workbench help, and see the topicAbout Feature Types.

筛选

This can be used to filter the attributes displayed in the Attributes window by the search terms you enter in the text box. This is very useful when searching for a particular attribute in a dataset that contains many of them.

几何学

This section of the Feature Information window displays all the geometry information for the currently selected feature. It is headed with the name of the FME Geometry Type to which the feature belongs.

Shown here are:

• The local coordinates of the bounding box (or cube in a 3D dataset) of the currently selected feature
• A full listing of all geometric information for the feature (coordinates for all geometry types, information about measures, transformation matrixes, raster bands, and so on).

Tip:If you click on the coordinates of a point listed in the geometry section of the Information window, the point is marked in the View window. You can also choose todisplay coordinates and text insertion pointsin the View window.