Instructions for use

"Spatial Index" button, used to manage the Spatial Index of the selected Dataset in the current Workspace Manager. Includes functions such as viewing the Spatial Index information of the Dataset and establishing the Spatial Index for the Dataset.

Operation steps

1. In Workspace Manager, select the Dataset for which you want to view the Spatial Index information or establish the Spatial Index. You can use the Shift key or Ctrl key to select multiple Datasets at the same time.
2. On the Home tab, in the Data Processing group, click the Spatial Index button. The Manage Spatial Index "dialog box appears, as shown in the following figure. Each record in the dialog box corresponds to the information of a Dataset.

The Original Index "field displays the Index Type of all selected Datasets. If the user wants to re-establish the Spatial Index for the Dataset, he can select to re-establish the Index Type for the corresponding Dataset through the "Index Type" column.

For instructions on how to use the Spatial Index Manager "dialog box, see Spa tial Index Manager" dialog box below.

3. If you want to rebuild the Spatial Index for the Dataset, you can set the Index Type to be rebuilt for the corresponding Dataset through the "Index Type" column, and then click the "OK" button in the dialog box. Application will rebuild the Spatial Index of all Datasets in the dialog box according to the value of the "Index Type" column in the dialog box.
4. After viewing or establishing the Spatial Index of the Dataset, click the Cancel button in the dialog box to exit the Spatial Index Manager "dialog box.

Figure: Spatial Index Manager "Dialog Box

Description of toolbar buttons
• Add: Click the "Add" button to pop up the "Select" dialog box, through which the Spatial Index information of other Dataset can be added to the "Spatial Index Manager" dialog box for display and further operation. After selecting the Dataset in the Select dialog box, click OK to complete the addition.
• Select All: Used to select all records in the table in the left area of the "Spatial Index Manager" dialog box.
• Invert: Used to reversely select the records in the table on the left side of the "Spatial Index Manager" dialog box, that is, the records that were not selected originally will become selected; the records that were selected originally will become unselected.
• Remove: Used to remove one or more records selected in the table in the left area of the "Spatial Index Manager" dialog box.
Spatial Index Manager "Dialog

The left area of the Spatial Index Manager "dialog box displays the information of all Vector Datasets currently selected in Workspace Manager in the form of a table, mainly displaying the Index Type information of the Dataset. Each record in the table corresponds to the information of a Dataset. The information represented by each column in the table and the functions and usage of other items in the dialog box are described in detail below.

• " Dataset" column: Displays the specific type of Vector Dataset, the alias, and the name of the Datasource.
• " Datasource" column: Displays the Datasource to which the Vector Dataset belongs.
• Original Index column: Displays the current Index Type of the Vector Dataset.
• " Index Type" column: If you want to rebuild the Spatial Index for the Dataset, you can specify the rebuilt Index Type through this column. The default value of this item is equal to the "Original Index" value of the Dataset. When the application system rebuilds the Spatial Index for the Dataset, it will rebuild the Spatial Index of the specified type for the corresponding Dataset according to the value of the "Index Type" column.

Click to select a cell in the "Index Type" column. After clicking the mouse again, a Drop-down Button will appear on the right side of the cell. Click the Drop-down Button to pop up a drop-down menu. The Index Type supported by the corresponding Vector Dataset is listed in the menu, and the user can select any one of them as the Rebuild Spa tial Index type of the corresponding Dataset.

In the right area of
• the "Spatial Index Manager" dialog box, the "Index Type" combo box is bound to the value of the "Index Type" item of a selected record in the left table, that is, the two change synchronously; If there are no selected records or multiple selected records in the table on the left, there is nothing displayed in the Index Type combo box.
Below

the Index Type combo box, the Description of the Index Type currently displayed in the Index Type combo box is displayed.

• " OK" button: Click the Create Button, and Application will rebuild the Spatial Index of all Datasets in the dialog box according to the value of the "Index Type" column in the dialog box. Therefore, before Create Spatial Index, you should remove the Dataset records in the dialog box that do not require Rebuild Spatial Index.
• Cancel button: Click the Close button to close the Spatial Index Manager "dialog box.
Parameter Settings

Mapsheet Index: Click the Drop-down Button on the right of Index Type, and select Mapsheet Index ", for which Field Index or Tile Index parameter needs to be set. The specific description is as follows:

Figure: Establishing a Maps heet Index.

• Field Index: It means to classify the spatial objects in Dataset and establish Maps heet Index according to the field value of a Specify Field in Dataset.
• Tile Index: indicates that the Dataset is divided into multiple units according to the specified width and height, and then the index is established on this basis. The width and height units of the range are consistent with the Dataset units.

Dynamic Index: Click the Drop-down Button on the right of Index Type, and select Dynamic Index ". For this type of index, Field Index or Tile Index parameter needs to be set. The specific description is as follows:

• Fiducial point: Sets the center point of the grid index. Typically the center point
of the Dataset
• First layer grid width: Set the size of the first layer grid of the Dynamic Index. This parameter cannot be 0. Units are consistent with Dataset.
• Second-level grid width: Sets the size of the second-level index grid of Dynamic Index. Units are consistent with Dataset.
• Third-level grid width: Set the size of the third-level index grid of Dynamic Index. Units are consistent with Dataset.

Note: The engine types that support the establishment of Dynamic Index include SQLPlus, OraclePlus, DB2, and MySQL.

Remark

1. Currently, supports R-tree index, Q-tree index, Dynamic index, and Mapsheet index.
2. UDB and POSTGRESQL Datasource only support R-tree indexes (RTree).
3. For other database-type Datasources, R-tree Index, Q-tree Index, Dynamic Index, and Mapsheet Index are supported.
4. CAD does not support Dynamic Index.
5. Route Dataset does not support Maps heet Index (TILE).
6. The property Dataset does not support any type of Spatial Index.

Related topics

For the Index Type of the Vector Dataset, see Index Type ".