Feature Description

Updates target dataset object attributes based on spatial relationships. The Update Attributes function provides two operation modes: updating the entire dataset, or updating through filter expressions.

Feature Entry

• Data Tab->Data Processing->Vector->Update Attributes, opens the Update Attributes dialog.
• Toolbox->Data Processing->Vector->Update Attributes, opens the Update Attributes dialog.

Parameter Description

• Source Dataset: Select the source dataset providing attributes. If a dataset is selected in Workspace Manager, it will be set as the source dataset by default.
• Target Dataset: Set the target dataset and its datasource for attribute updating.
• Statistic Field: Select a field to store the count of updated sub-objects. Unupdated sub-objects are assigned 0, while updated ones are numbered sequentially as 1,2,3...
• Filter Expression: Click the right-side button to open the SQL Expression dialog for setting field filters. Objects meeting the expression criteria in the target dataset will be excluded from attribute updates.
• Spatial Relationship: Defines the spatial relationship between source geometries and target geometries, including Contain, Within, and Intersect:

  In the following diagrams, green indicates source objects, red indicates targets meeting spatial relationships, and black indicates non-qualifying targets.

  • Contain: Source geometry contains target geometry.

    Object	Target Point	Target Line	Target Region
    Source Point
    Source Line
    Source Region

  • Within: Source geometry is contained by target geometry.

    Object	Target Point	Target Line	Target Region
    Source Point
    Source Line
    Source Region

  • Intersect: Source geometry intersects with target geometry.

    Object	Target Point	Target Line	Target Region
    Source Point
    Source Line
    Source Region

• Boundary Handling: Determines whether region boundaries are considered internal. Options: Not Contain Border or Contain Border. This setting activates only when judging point-in-polygon containment or line-polygon intersection.
  • Contain Border: Points on region boundaries are considered contained; lines intersecting boundary points are considered intersecting.
  • Not Contain Border: Boundary points are excluded from containment; lines only intersecting boundaries without interior points are not considered intersecting.
• Value Assignment Method: Defines how to handle multiple qualifying source objects:
  • Assign Value: Randomly selects one attribute value. Suitable for one-to-one assignment.
  • Average: Updates with average value (numeric fields only).
  • Sum: Updates with sum of values (numeric fields only).
  • Maximum: Updates with maximum value (numeric fields only).
  • Minimum: Updates with minimum value (numeric fields only).
  • Max SMID: Uses attribute value from object with maximum SmID.
  • Min SMID: Uses attribute value from object with minimum SmID.
  • Concatenate: Merges multiple values with a separator into target field (supports text/character types only).
  • Maximum Intersection Area: Uses attribute value from object with largest overlapping area.
• Separator: Required when using Concatenate method. Default: comma.
• Field Settings: Check Source Fields to update, then select corresponding Target Fields through double-click.
  Notes:

  Supports cross-type field updates and creating new target fields for attribute updates.

• After update, selected fields (existing or newly created) in target dataset will reflect source dataset values.

Related Topics

Calculate Geometry Attributes

Reclassify

Append Rows

Batch Append Rows