Questions tagged [splitting]
Division or partition of geometric features
566
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Splitting polygons by centroid - Pizza Slices
Edited: 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 ...
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2
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2
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45
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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 ...
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1
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1
answer
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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 ...
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0
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36
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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 ...
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21
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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 ...
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50
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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 ...
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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 "...
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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 ...
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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 ...
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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 ...
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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 ...
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38
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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 ...
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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 ...
4
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101
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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 ...
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4
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91
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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 ...
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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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40
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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 ...
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11
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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 ...
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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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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'...
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101
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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 ...
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23
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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 ...
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28
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Polygons disappearing after using the splitting tool in QField
I am trying to make a QField project which can be used for mapping the vegetation types in nature areas. For some projects I have received a polygon shapefile with the old data. So, I want to edit the ...
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36
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QGIS 3.28.7 Split merged line network to surveyed lines network
I need to create a shapefile of unsurvey road section in the network. I am using a surveyed layer (Lines) that does not overlap on the network. It is just parallel. I tried the select by location ...
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63
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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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2
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169
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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,...
0
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1
answer
65
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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 ...
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56
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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 ...
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103
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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 ...
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1
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199
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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 ...
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2
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1
answer
69
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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 ...
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56
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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'...
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54
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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 ...
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264
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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 ...
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2
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187
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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 ...
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1
vote
1
answer
49
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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 ...
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1
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50
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Cutsom ST_Multisplit function returning more than one split line. How to only return one line split at various points?
I Have a modified version of the function from How to ST_Split features in one table by features in another?
CREATE OR REPLACE FUNCTION ST_Multi Split(geom Geometry, blades Geometry) RETURNS Geometry ...
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1
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187
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ArcGIS Pro Split 'multiple buffer ring' output into separate polygons based on centroids
I have created multiple buffer rings around 10 separate points, every 20 m for 320 m. I ran this tool with the dissolve option off.
The output is creating one polygon for every ring distance (ie every ...
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69
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Using point features to split lines
I have several point feature classes I would like to use to split a line feature class. I am trying to determine whether there's a way to split the lines in the existing feature class (and not create ...
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QGIS (3.28.2) split features doesn't work
I have a QGIS-project with a set of features. I need to split these features into smaller ones. I use the 'Split features' tool and everything seems to work. The only problem is the feature is not ...
- 527
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Error using tool Split lines at points
When using the tool split lines at points, the line splits in places where there are no cutting points. I use a 1m epsilon.
In the first image you can see the line to be cut with the lilac point
In ...
2
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1
answer
147
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Split polygon features at specified point
I have three layers: points, lines, polygons. Each polygon feature contains one centroid point inside the polygon. I'd like to split each polygon with a line running through its respective centroid ...
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2
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152
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Splitting vectors in half using QGIS
I have a selection of vectors in QGIS (about 1000) that I'd like to split in half at once. I've already used the v.split from GRASS but as the length of links are very different one from another, I ...
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1
answer
426
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QGIS crashes when using "Split with lines" tool
I want to use the "Split with line" tool on a dataset with 5000 line features. It works if I select some of the lines, but on the whole dataset, it crashes.
Is there a way to solve/work ...
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29
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How to split unintentionally conjoined features into single parts at scale? [QGIS]
I have this layer of linear features which I produced from vectorising a raster image. The features in question are berry plantations that are more or less consistent lengths and widths, but some ...
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Splitting vector layer based on shortest distance to feature in another layer in QGIS
I have two shapefiles of Europe. One is a highly accurate shape of the continent, the other is a map of countries in Europe in 1500, containing the names of all countries as attributes. Sadly, the ...
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1
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286
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Contours into polygons with QGIS
I'm using QGIS 3.26 to create a precipitation map for Los Angeles. I started with Final 85th Percentile, 24-hr Rainfall contours from here: https://dpw.lacounty.gov/wrd/hydrologygis/
I brought the ...
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1
answer
81
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Splitting polygon on the curving edges using QGIS
I have a set of polygons with irregular shapes, I am interested in cutting these polygons in the curves:
What I want to achieve:
How could I solve it?
I tried to use the vertices of the curves ...
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