# Questions tagged [splitting]

Division or partition of geometric features

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### Divide / Split a polygon feature (many polygons) using area size stored in attributes [duplicate]

I want to split polygons in a polygon feature based on area values stored in attributes like: Area1, Area2, Area3, Area4... So, every polygon in the polygon feature have to be split in 5 parts (for ...
1 vote
63 views

### splitGeometry does not produce two geometries with PyQGIS

I am working on a script that checks features for (rough) rectangularity and splits them if they are not. If I correctly understand the splitGeometry method, it should produce two geometries if ...
• 11
1 vote
48 views

### Dividing Voronoi polygons into sectors

I have a point dataset and I'm trying to create Voronoi polygons and then divide the polygons into three sectors of 120 degrees. I'm using QGIS so creating the Voronoi polygons is the easy part. I've ...
• 11
78 views

### Split polygon based on what's visible on the screen

I have two datasets - a large polygon that contains all wards boundaries, and a gps coordinates of places visited, that fall within a city's boundaries as well as slightly outside. I'd like to save a ...
• 21
70 views

### R How to Split MULTISTRING sf objects Based on Points

I have grouped connected lines and now would like to split these lines into smaller groups based on points. I have found a couple of examples of how to do this with LINESTRING geometries but not with ...
• 103
55 views

### Splitting a vector layer by selected features using PyQGIS

I'm new to PyQGIS I'm trying to split selected features into another vector layer using the Split layer function The code I have is: area_layer = map.gpkg fpath_v = C:/output dirctory/filename.gpkg ...
• 1
41 views

### Split a line network at "T-junctions / 4 way intersections" in the data?

I have a large network of lines (EDIT clarification: The dataset is not a network, just geometries). I need to dissolve the lines and split them so each line segment is its full length, but ends where ...
62 views

### Split line by another line doesn't work

I have a point layer and a line layer (old). I projected my points to the closest line of the line layer. For it I used geometry expression shortest_line( @geometry, aggregate('old_line', ...
• 347
1 vote
132 views

### What's the best way to 'split' this layer (QGIS)?

I'm quite new to all this. I have this polygon (MultiPolygon) which represents two areas (being visually separate), and now I want to split it so I have two polygons representing two different areas. ...
• 19
105 views

### Generate dynamic sum of attribute values from one layer based on overlap with polygons on another layer

I'm using QGIS 3.28 on Windows. I'm trying to make a workflow for determining whether a proposed lot satisfies minimum lot sizing based on soil type composition. I have: a single-polygon overall ...
57 views

### In QGIS, how do I split lines in MultilineString shapefile into segments based on an attribute value that is linked to each line within the shapefile?

Question: In QGIS 3.26.3-Buenos Aires, how do I split the lines in a MultilineString ESRI shapefile into a number of segments based on an attribute value that is linked to each line within the ...
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1 vote
135 views

### Splitting line to upper and lower parts in QGIS

I need to split lines (rivers) to upper and lower parts (upstream and downstream) by points (fish barrier). All the original lines start from upstream and end downstream (picture). SAGA's "Split ...
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1 vote
36 views

### Unable to set working directory for split vector layer tool

I have some data in a .shp layer that I want to separate into multiple vector layers based on ID. When I navigate to the Split Vector Layer tool, I can select my input layer, unique field ID, and ...
• 61
72 views

### Using "Subdivide Polygon" in ModelBuilder with an iteration via the split angle (value from input feature class) to split polygons in their centres

I have a lot of polygons that I would like to split automatically in the centre/into two equal parts in ModelBuilder. My idea was to first determine the orientation of the polygons using the Minimum ...
173 views

### Splitting polygons though centroid like Pizza Slices in QGIS

I am aware of how to create centroids and how to divide a polygon by line, but not how to create those lines from each centroid. I was wondering if anybody knows a technique/algorithm/plugin that ...
• 81
65 views

### Splitting polygon that is result of difference function between two polygons in QGIS

So I have this polygon (picture 1) that will be used to make its bounding geometry as shown in the second picture. After making this bounding geometry, I wanted to make the difference polygon from ...
• 21
1 vote
87 views

### Splitting a MultiLineString with Shapely Split preserving the original MultiLineString composition

I have a gdf with Streets. I want to split a street with other streets (left side: Split the brown line at intersection with the green line): Whenever i split it (using shapely split()) I recieve all ...
• 61
75 views

### Split with lines in QGIS get stuck at a certain %

I have a problem when using split with lines in QGIS. So I have two layers, First is land cover classes (closed forest, open forest, cropland, etc.), and Second is a management blocks. My task is to ...
• 21
24 views

### Isolating points from a line shapefile (and check the attributes from specific points) using QGIS

I am new to QGIS and spatial data handling. I have a shapefile of a boat track and a shapefile of the border between two countries in QGIS. Parts of the boat tracks are in the waters from country 1 ...
• 21
111 views

### Splitting polygon based on number of points in it using ArcGIS Pro

Based on the mock-up below, is it possible to split a polygon into multiple polygons depending on the number of points that are within that polygon? I am using ArcGIS Pro 3.1.1. I know there is a ...
• 1,184
118 views

### How to split a polygon with a line that does not fully extend across the polygon (R)?

I have a polygon that I would like to split into two using lwgeom::st_split(). The polygon is a buffer that I created using st_buffer() from the sf package around a linestring, which is also the "...
72 views

### Is it possible to split a polyline into three equal segments that are rounded down to the nearest integer without allocating the remaining amount?

I need to split polylines that are over 900m into three equal segments. I need the segment lengths to be integers that are rounded down without the remaining amount being allocated to either the last ...
• 1
1 vote
123 views

### Split lines with intersections

I basically want to divide this main line (LRS187) into several segments divided by points (LRSEvents187). I tried to use 'Split Lines at Points' tool from SAGA but got nowhere. I tried making ...
45 views

### QGIS 3.22.16 Split road lines at polygon border

I am using the QGIS 3.22.16. I tried to get the length of the roads in each county. I used the clip tool however the road length of the ones crossing the boundary still the same length. By any chance ...
• 321
53 views

### Geoprocessing Split does not preserve field domains ArcGIS Pro 3.1.3

I have a file geodatabase with a single polygon feature class and a field domain defined for an attribute. I have a shapefile as a blade. When Splitting is started, the output geodatabase tables do ...
• 4,500
96 views

### Split a line using "Split lines by maximum length" does not generate a result using QGIS

In QGIS I try to split a line of 11.7 km length into segments of 450m plus a rest. I tried to use "Split lines by maximum length", but it just does not work. For some reason, to the right of ...
• 41
104 views

### QGIS Split Vector Layer By Multiple Attributes

I am working on a fiber network file and would like to be able to split a point shapefile by multiple attributes, three to be exact. I can "Select Features by Value" and export each one but ...
144 views

### Splitting polygon based on given proportion of its area in PostGIS [closed]

The problem I am trying to solve is to divide a given polygon into smaller polygons based on a given input number (proportion of the polygon). In this example, the desired output would be a ...
• 49
94 views

### Dividing a database according to a date in QGIS?

I would like to create a new column in my database in order to work with three blocks of observations: before 2000 (until 1999/12 included), from 2001/01 to 2009/12; from 2010/01 onwards, until today)....
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### Splitting a point vector based on a date attribute within the QGIS Graphical Modeler

I have now a model which processes two layers of points corresponding to observations at 'Time_1' and 'Time_2'. It counts the observation per quadrats in a grid and obtains two outputs: a grid with ...
1 vote
152 views

### Splitting lines and deleting segments in QGIS

I have created a line that I now want to partially delete. I tried to do it with "split feature" but it didn't work. The wohle line deleted automatically when using this function. As you ...
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53 views

### Using PostGIS to split linestrings with points

I would like to cut my line network using points that I have created using ST_LineInterpolatePoint, however, when I use the query created by @geozelot from a similar question I get a generally unsplit ...
• 995
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### Parcels disappear when splitting polygons in QField

I have found that when I split polygons using the digitising tools in QField then the neighbouring parcels disappear when the project is synced with QGIS. How can I prevent this? E.g. I have three ...
81 views

### Splitting line manually at intersection in QGIS

I would like to split the CA line at the exact point where it intersects the NC line. I try to use the Split Features Tool (scissors) in QGIS but it doesn't cut the line at the exact point of the ...
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1 vote
18 views

### Split Line by Point and applying different styles for the split layer depending upon the Point layerlayer QGIS

I am using QGIS. I have a point layer and line layer. I want to split the line layer by point layer and color the line layer according to the content of the 'Name' filed in the point layer. The 'Name'...
312 views

### Splitting features if composed of spatially separated parts in QGIS

I have a very messy shapefile where some of the features are composed of many separate parts (spatially) but classed as one feature. I need to delete all the tiny slivers but can't do this when they ...
• 313
27 views

I am trying to aggregate road network segments by intersection using QGIS. The blue route consists of 1000 links, and I want to aggregate this route into two segments. Ex: first and second segments ...
• 21
131 views

### QGIS error code, trying to split a layer [closed]

I keep getting the error code below when trying to split a polygon. There appear to be no duplicates and I have been able to spilt other layers within the same shapefile. Can anyone give me any work ...
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309 views

### Splitting complex polygon in QGIS

I have a problem with a polygon in QGIS. Is a polygon that represents all street areas in a city: And I want to slip all the area into smaller areas that represent the area of each street in the city,...
74 views

### Adaptive polygon division in QGIS

Let say I have an irregular polygon layer that I want to divide into squares of fixed size (i.e. 50 x 50m). The simplest solution is to create a grid based on the polygon extension and then use the ...
• 47
72 views

### Create new unique polygons by splitting existing polygon by intersecting polygon ArcGIS Pro

I have polygon shapefiles for a series of roadways in ArcGIS Pro. I also have intersecting polygons for intersections on these roadways. I am trying to split the roadways by cutting them with the ...
167 views

### Dividing city into blocks (polygons) in QGIS

I'm interested in dividing a city up into distinct blocks, with the end result being polygons for the blocks. I have a polygon for the city boundary and centerlines for the city streets. Here's a ...
• 229
387 views

### Splitting all line features into equal parts using ArcGIS Pro

Using ArcGIS Pro, I have a matrix of roads clipped for a County and looking to split this line feature into 3 equal parts (e.g., east, central, west). The split options in the Toolbox seem to only ...
• 21
154 views

### Create dashed line with standard length and standard interval

For a project, I need to create a dashed line (from scratch, or possibly also out of a solid line). The dashes need to have a standard length of 1 meter, but (and here's the difficulty) the intervals ...
• 107
63 views

### Split line with distance and particular point

I try to split line, or exactly, I want to make a new line between 2 lines. I try to interpolate point, but it's create 1 point on every node. I need only on start point. I try to buffer point, but it'...
• 538
1 vote
69 views

### Cut polygon shapefiles by line shapefiles grouped by unique id

I have a polygon shapefile that consists of different polygon features. Each polygon features can be identified by a unique group_id. I also have a line shapefile with different straight line features ...
• 195
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### Dividing shapefile into two parts using Python

I have a shapefile, as shown in the below image. I want to split it into two different shapefiles, as shown in the second image. How can I achieve this using Python? What I have tried so far is ...
• 9
212 views

### Identify and split data in other languages using QGIS

I have a dataset containing names in both English and other languages and mixed too. Is their any way to remove data containing other than English language? Eg:
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### Dividing point layer according to boundary layer in QGIS

I have two layers: All the post offices in the city (point layer) Division of the city into boundaries according to their neighbourhood council (MultiPolygon layer) How do I split the first layer ...
• 53
1 vote