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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 ...
Razvan Dumbrava's user avatar
1 vote
0 answers
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 ...
RavenS's user avatar
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1 vote
0 answers
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 ...
GMcS's user avatar
  • 11
2 votes
1 answer
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 ...
Nick's user avatar
  • 21
0 votes
0 answers
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 ...
CCurtis's user avatar
  • 103
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1 answer
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 ...
Bee's user avatar
  • 1
0 votes
1 answer
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 ...
Kristian Herner's user avatar
2 votes
1 answer
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', ...
redhat's user avatar
  • 347
1 vote
1 answer
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. ...
Meghan's user avatar
  • 19
3 votes
1 answer
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 ...
dsjeffery's user avatar
0 votes
1 answer
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 ...
Sean's user avatar
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1 vote
1 answer
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 ...
omomom's user avatar
  • 11
1 vote
1 answer
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 ...
anzac21's user avatar
  • 61
0 votes
1 answer
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 ...
Valerie's user avatar
4 votes
3 answers
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 ...
Alex_P's user avatar
  • 81
2 votes
2 answers
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 ...
Yosua's user avatar
  • 21
1 vote
1 answer
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 ...
luidwig's user avatar
  • 61
0 votes
0 answers
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 ...
zxz_341's user avatar
  • 21
2 votes
0 answers
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 ...
FanCou's user avatar
  • 21
2 votes
1 answer
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 ...
Arthur_Morgan's user avatar
0 votes
1 answer
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 "...
jccborders's user avatar
-1 votes
2 answers
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 ...
Lou's user avatar
  • 1
1 vote
1 answer
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 ...
Carmen Marco's user avatar
0 votes
0 answers
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 ...
GIS Noh's user avatar
  • 321
2 votes
1 answer
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 ...
pigreco's user avatar
  • 4,500
2 votes
1 answer
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 ...
Timm's user avatar
  • 41
0 votes
1 answer
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 ...
OregonBladez's user avatar
4 votes
1 answer
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 ...
Belén F.'s user avatar
4 votes
1 answer
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)....
Geo_it's user avatar
  • 523
0 votes
0 answers
26 views

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 ...
Sebastian Silva's user avatar
1 vote
0 answers
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 ...
eva's user avatar
  • 59
0 votes
0 answers
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 ...
MJM's user avatar
  • 995
0 votes
0 answers
16 views

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 ...
Chloe's user avatar
  • 1
3 votes
1 answer
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 ...
JoanB's user avatar
  • 143
1 vote
0 answers
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'...
ujjwal basnet's user avatar
5 votes
1 answer
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 ...
user3390486's user avatar
2 votes
0 answers
27 views

How to dissolve links and split by other links

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 ...
eun lee's user avatar
  • 21
2 votes
0 answers
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 ...
Lucy 's user avatar
  • 21
3 votes
2 answers
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,...
Daniel Miranda's user avatar
0 votes
1 answer
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 ...
flisior's user avatar
  • 47
0 votes
0 answers
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 ...
Tristan's user avatar
3 votes
1 answer
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 ...
GDog's user avatar
  • 229
0 votes
1 answer
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 ...
Ian Fife's user avatar
2 votes
1 answer
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 ...
BramV's user avatar
  • 107
0 votes
0 answers
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'...
pasqal's user avatar
  • 538
1 vote
1 answer
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 ...
sampeterson's user avatar
0 votes
0 answers
346 views

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 ...
pkv's user avatar
  • 9
0 votes
2 answers
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:
Bruno B's user avatar
  • 849
4 votes
1 answer
88 views

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 ...
Galv01's user avatar
  • 53
1 vote
1 answer
66 views

Iterating SAGA Split Features Layer tool across files in directory using python

I have a few thousand polygon shapefiles in a folder that I would like the SAGA Split Features Layer tool to perform its operation on. The operation and parameters are the same for every polygon, but ...
MJM's user avatar
  • 995

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