Remove Duplicate Vertices
Summary
Deleting duplicate vertices from features does not cause geometry degradation and does not modify feature properties. It can be used in the following situations:
1. Data cleaning. When importing or processing data, there may be duplicate vertices that can interfere with subsequent analysis or visualization.
2. Optimize the geometric structure. Removing duplicate vertices simplifies geometry, reduces data redundancy, and improves data processing efficiency.
3. Topology check. Duplicate vertices can lead to errors or exceptions when performing topology checks, and removing these vertices ensures the topological correctness of the data.
Usage
ClickData Management> Vector Tools > Remove Duplicate Vertices
Settings
- Select File:：Enter the vector file from which you need to remove the duplicate vertices. The input file format supports shp and gpkg formats, and the feature types can be points, lines, and surfaces. For gpkg format, the duplicate point operation is performed on all features of each layer in the file.
- Tolerance：The tolerance parameter determines whether the vertices have the same coordinate tolerance. If the distance between two vertices in the same feature is less than the tolerance, one vertex is removed.
- Use Z Value：By default, the Z-value is not considered when detecting duplicate vertices. For example: two vertices with the same X and Y coordinates but different Z values will still be considered duplicates and one of them will be deleted. If the parameter with the Z value is true, the Z value will also be tested, and the vertices of X and Y will be the same but Z different.
- Output Path: After the function is executed, the clipped vector will be output. The output file format is GPKG. If the input is in GPKG format, the output file retains the same layer names as the input file. If the input is in SHP format, the output layer is named "0".
Attention：
This tool is suitable for cleaning up redundant vertices within a single feature part, and in multipart geometry, duplicate vertices between different parts are not detected. For example, a MultiPoint containing two identical coordinate points, but they belong to different parts (e.g., Part 1 and Part 2), will not be deduplicated.