KGA Geometry Utilitiesផ្ទាំងអន្តរកម្ម

Duplicate Checker

ស្វែងរក និងបង្ហាញគុណលក្ខណៈ ឬធរណីមាត្រដែលស្ទួន។

រកឃើញនៅឯណា
Processing ▸ Toolbox ▸ KGA Toolbox ▸ KGA Geometry Utilities ▸ Duplicate Checker
លេខសម្គាល់ algorithm
kga:duplicate_checker
ប្រភេទឧបករណ៍
Interactive dialog — modeless, needs the QGIS window

ទិដ្ឋភាពទូទៅ

Finds features that repeat — either the same value in a chosen field, or the same geometry — and shows you which ones they are, by selecting them or by colouring them on the map.

The usual use: a parcel number that was issued twice, or a point that was digitized twice on top of itself after a bad import.

ប៉ារ៉ាម៉ែត្រ

The algorithm takes no Processing parameters — running it opens the window. The controls below are the window's.

Parameters for Duplicate Checker
ផ្ទាំងគ្រប់គ្រងប្រភេទតម្លៃលំនាំដើមការពិពណ៌នា
Input LayerLayer combothe active layerAny vector layer.
ModeCombo boxCheck Duplicate Field ValueCheck Duplicate Field Value compares one field; Check Duplicate Geometry compares the geometries themselves.
FieldField combofirst fieldThe field compared. Enabled only in field mode.
Highlight ActionCombo boxSelect Duplicate FeaturesSelect Duplicate Features selects them; Symbolize (Categorize) recolours the whole layer.
Detect and Highlight DuplicatesButton—Runs the check and reports the count in a message box.

របៀបប្រើ

  1. Open KGA Geometry Utilities > Duplicate Checker. Close the Processing window once the pane appears.
  2. Pick the Input Layer.
  3. Choose the Mode: compare one field's values, or compare the geometries.
  4. In field mode, pick the Field to compare.
  5. Leave Highlight Action on Select Duplicate Features unless you deliberately want the layer restyled — the symbolize option writes a field and replaces your symbology.
  6. Press Detect and Highlight Duplicates. A message box gives the count.
  7. Open the attribute table filtered to the selection to see which records collide.

លទ្ធផល

Depends on the Highlight Action:

  • Select Duplicate Features — the duplicates end up as the layer's selection. Nothing is written; clear the selection and the run leaves no trace.
  • Symbolize (Categorize) — the layer gets a text field is_dup_temp holding Duplicate or Unique for every feature, and a categorized renderer showing duplicates in red and the rest in grey. This is a real, committed edit.

A message box reports how many duplicates were found, or says none were.

កំណត់សម្គាល់ និងដែនកំណត់

  • Symbolize (Categorize) writes to the layer. It adds the is_dup_temp field, fills it for every feature, commits the change, and replaces the layer's renderer. The existing symbology is lost. Use Select instead if you only want to look — and if you do symbolize, remember to delete is_dup_temp and restore your styling afterwards.
  • All features of a duplicate group are flagged, including the first one — the tool tells you which records collide, not which to delete.
  • Geometry mode compares WKT exactly. Two geometries that differ in vertex order, precision or ring direction are not reported as duplicates even when they draw identically.
  • Null values are grouped together: every feature with an empty field counts as a duplicate of every other one. The same applies to null geometries.
  • The whole layer is read, regardless of any selection or filter.
  • The window stays open. Close the Processing dialog behind it and keep working.
  • The tool cannot run headless or inside a model.
ត្រឡប់ទៅឯកសារណែនាំ