Divide By Area

Function Description

Uses the divide orientation to split the target polygon object by area into a specified number of blocks or by equal proportions. Currently supports data with projected coordinate systems and planar coordinate systems; does not support partitioning data with geographic coordinate systems. This function can be used for land allocation, enabling precise division by specified area and specified orientation.

The Divide by Area button is only available when there is an editable layer in the current map and one or more select objects exist in that layer.

When the data uses a geographic coordinate system, this button is unavailable.

Function Entry

  • Edit Data Tab -> Feature Editing Group -> Face Editing -> Dimension and Segmentation -> Divide by Area

Operation Instructions

  1. Set the polygon geometric object layer to be divided in the map to editable, and select one or more polygon objects to be divided.
  2. In the Edit Data tab's Face Editing drop-down menu, click the Divide by Area button in the Dimension and Segmentation group to open the Divide by Area dialog box.
  3. The upper list box in the dialog displays the SmID and area (m²) of the selected polygon objects to be divided. You can select objects individually to set the divide settings for each, or select multiple or all objects to apply uniform settings.
  4. Divide Orientation: Set the two parameters: azimuth and direction.

    As shown in the figure below, dividing a 100,000 square meter plot to extract a 30,000 square meter object, with the azimuth set to 90° and the direction set to south and north respectively. When the direction is South, the southern side of the object is cut; when it is North, the northern side is cut. The results are as follows:
    • Azimuth: Sets the clockwise angle between the cutting line and true north.
    • Direction: Sets the cutting direction. If the cutting azimuth is 0 or 180 degrees, the cutting directions are East and West. If the cutting azimuth is 90 or 270 degrees, the cutting directions are North and South.
  5. Specify segmentation type: Users can choose from two segmentation types, including:

    Merge remainder region to adjacent region: When cutting a polygon by area, a remaining polygon object may exist. Checking this option will cause the program to merge the remaining region with an area less than or equal to the specified Merge area into an adjacent polygon. If unchecked, no merge will occur. As shown below:
    Note:

    Only when the area of the remaining region is less than or equal to the set area can the merge be done; otherwise, it cannot be merged.

    • Divide by Area: Specify the area for dividing the polygon. The object is split into multiple blocks based on this area, with the number of blocks determined by Number of Blocks. The number of cutting blocks cannot exceed (original polygon area / cutting area).
    • Divide By Part: Equally divides the object based on the specified number of blocks. Here, Number of Blocks represents the final number of resulting polygons.
  6. Click the OK button to execute the divide by area operation.