KGA Geometry Utilitiesផ្ទាំងអន្តរកម្ម

Geometry Conversion

បើកប្រអប់សម្រាប់បម្លែងស្រទាប់ polygon ឬបន្ទាត់ ទៅជាធរណីមាត្រសាមញ្ញជាង៖ អង្កត់ព្រំដែន ចំណុចកណ្តាល កំពូលព្រំដែន ឬកំពូលបន្ទាត់។

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

ទិដ្ឋភាពទូទៅ

Explodes polygon and line layers into simpler geometries: boundary segments, central points, boundary vertices or line vertices — and writes the result wherever you want it, including straight into a GeoPackage or a File Geodatabase.

The four conversions cover the jobs that keep coming back: getting one line per parcel course, getting a label point that is guaranteed to fall inside its polygon, getting the vertices of a boundary as points to compare against a survey.

ប៉ារ៉ាម៉ែត្រ

The algorithm takes no Processing parameters — running it opens the window. The controls below are the window's; the option rows shown change with the mode.

Parameters for Geometry Conversion
ផ្ទាំងគ្រប់គ្រងប្រភេទតម្លៃលំនាំដើមការពិពណ៌នា
Input LayerLayer combothe active layerThe polygon or line layer to convert.
Conversion ModeCombo boxPolygon → Two-Point LinesPolygon → Two-Point Lines (one 2-vertex line per boundary segment), Polygon → Central Point, Polygon → Boundary Points (one point per ring vertex), Line → Vertices (one point per vertex).
Include holesCheckboxtickedWhether interior rings contribute segments or vertices. Polygon modes.
Point MethodCombo boxPoint on SurfacePoint on Surface is guaranteed to fall inside the polygon; Centroid may not, for a concave or ring-shaped one. Central-point mode.
One central point per partCheckboxuntickedMultipart polygons get a point per part instead of one per feature. Central-point mode.
Selected features onlyCheckboxuntickedConvert just the current selection.
Remove duplicate geometriesCheckboxuntickedDrops repeats — useful for boundary segments shared by two parcels, which otherwise come out twice.
Add geometry fields (XY/LatLon or Length)CheckboxtickedAdds coordinate fields to point output, and length_m to line output.
Store Output InCombo boxTemporary layerTemporary layer (in memory, nothing on disk), Folder (ESRI Shapefile), GeoPackage (.gpkg), File Geodatabase (.gdb).
Folder / DatabaseFile widgetemptyThe folder or container. Not used for a temporary layer.
Output NameTextderived from the inputThe shapefile base name, or the layer name inside the container.
Run ConversionButton—Runs it. A progress bar reports the pass.

របៀបប្រើ

  1. Open KGA Geometry Utilities > Geometry Conversion. Close the Processing window once the pane appears.
  2. Pick the Input Layer and the Conversion Mode. The option rows below change to match the mode.
  3. Set the options that matter for that mode — Include holes for the polygon modes, Point Method for central points, Remove duplicate geometries when neighbouring polygons share boundaries.
  4. Choose Store Output In. Start with Temporary layer to check the result; switch to a GeoPackage or a folder once you are happy.
  5. Fill in Folder / Database and Output Name for the non-temporary destinations.
  6. Press Run Conversion. The result is added to the project.

លទ្ធផល

  • A new layer holding the converted geometries, in the chosen destination, added to the project.
  • Point output carries X/Y or latitude/longitude fields, line output carries length_m, when Add geometry fields is ticked.
  • Existing layers in a GeoPackage or File Geodatabase container are left untouched — a new layer is added beside them.

កំណត់សម្គាល់ និងដែនកំណត់

  • length_m is an ellipsoidal length in metres, using the project ellipsoid; it falls back to planar CRS units converted to metres when no ellipsoid is set.
  • Curved geometries are segmentised first. A CircularString or CurvePolygon becomes straight segments before anything is exploded.
  • Shapefile output truncates field names to 10 characters. The generated field names are shortened up front so they stay unique, and a .cpg sidecar is written so UTF-8 and Khmer attributes survive the DBF.
  • File Geodatabase output needs GDAL's OpenFileGDB driver (GDAL 3.6 or newer). An older GDAL cannot write one.
  • The window stays open. Close the Processing dialog behind it and keep working.
  • The tool cannot run headless or inside a model.
ត្រឡប់ទៅឯកសារណែនាំ