Divide by Area

Feature Description

Divides polygon objects by specified area quantities or equal proportions using divide orientation. Currently supports data in projected coordinate systems and planar coordinate systems, does not support geographic coordinate system data partitioning. This feature can be used for land allocation, enabling precise division with specified areas and orientations.

The Divide by Area button becomes available only when there's an editable layer with one or more selected objects in the current map.

The button remains disabled for geographic coordinate system data.

Feature Entry

  • Features Tab->Feature Editing Group->Divide by Area.

Steps

  1. Set the polygon layer to be editable in the map, and select one or more target polygons.
  2. Click the Divide by Area button in the Feature Editing group under the Features tab to open the Divide by Area dialog.
  3. The upper list displays SmIDs and areas(m²) of selected polygons. Configure division settings individually, or apply uniform settings to multiple/all selected objects.
  4. Divide Orientation: Configure azimuth angle and orientation parameters.

    As shown below, when dividing a 100,000 m² land parcel into a 30,000 m² portion with 90° azimuth: Selecting South orientation cuts the southern portion, while North orientation cuts the northern portion. Results are as follows:
    • Azimuth: Sets the clockwise angle between the division line and true north.
    • Orientation: Determines division direction. When azimuth is 0° or 180°, orientations are East/West. When 90° or 270°, orientations become North/South.
  5. Specify division type: Two options available:

    Merge remainder region to adjacent region: When dividing polygons by area, residual regions may occur. Checking this option merges residual areas ≤ specified Merge Area into adjacent polygons. Unchecked areas remain separate. Illustration:
    Notes:

    Merge only occurs when residual area ≤ specified merge area. Larger residuals remain unmerged.

    • Divide by Area: Specify target area per division block. The Quantity parameter determines maximum divisions, calculated as (Original Area / Division Area).
    • Divide By Part: Divide object into equal parts. Quantity directly specifies final polygon count.
  6. Click OK to execute division.