Questions tagged [splitting]

Division or partition of geometric features

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Seeking alternative to ArcGIS Pro Split tool

Using ArcGIS Pro for references: I have a polygon feature converted from raster that covers a large area produced by a suitability analysis. There are a lot of little shapes (11,932 total) within the ...
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QGIS split polygons does not create new polygon [closed]

I am fairly new to QGIS. I need to split one polygon into two. I have done this with one of the Split tools (and don't remember which one, unfortunately). It created a line where I want the split but ...
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Split with Lines not splitting polygon in QGIS [closed]

Split with Lines does not appear to be working for me in QGIS 3.24. My line and polygon are in the same CRS, you can see that they completely intersect but when I get the results, the polygon is ...
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Split KML Polygon in two polygons

I have a country borderline KML polygon (one polygon), I would like to split in in two regions (two polygons). Let's say, we have Germany borders in KML, and I would like to split it in East and West ...
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Splitting feature into individual features in QGIS

In QGIS I have a layer that is made up of a large number of polygons that are merged together to form one feature. Is it possible to split this feature into the individual polygons that make it up so ...
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Issues splitting a polygon layer by line

So we have a problem, and we can't a find solution. if feat_L.geometry().intersects(feat_P.geometry()): success, splits, topo = feat_P.geometry().splitGeometry(feat_L.geometry().asPolyline(), True)...
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QGIS - how to split features based on overlap

Splitting by overlap I need to find a way to split features based on overlap within the same layer. If, for example, I have two circles that overlap partially, I would have an output of three features ...
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3 votes
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Split polygon by regard of distance to other shapefile

Is there some function that use distance to point/polyline layer to split a polygon layer In Sweden the law says that undivided water belongs to the nearest property so sometimes I need to calculate ...
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How to transfer/split the boundaries of single IDs from one shapefile to another

I did a Land Use Land Cover Classification from a satelite image and converted the result from raster format to a polygon shapefile. Now I want to split the single polygons to the boundaries of ...
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2 votes
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PostGIS ST_Split outputs without a split

I have a PostGIS workflow that has a line file that has been buffered then subdivided and a vectorized raster called myvector. My intention is to split or separate myvector based on the bounds of the ...
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1 vote
1 answer
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Split by attributes function only splits some, but not all values?

I have a shapefile that has GPS coordinates and categories such as ID. I wanted to split my shapefiles into separate shapefiles for each ID. When I use split by attributes, it only extracts/splits ...
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3 votes
1 answer
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Splitting line-layer with point-layer in QGIS

I have a separate layer with polylines that are merged into one object. I want to split it by a separate layers with points in QGIS. I have tried using the SAGA tool "Split Lines at Point" ...
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Create point feature at line intersection and split lines - R [closed]

I have a shapefile that shows all the roads in Germany. Hereby, I want to create a point at each intersection of lines. Based on this created point, I can split the line into separate line features. ...
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2 votes
1 answer
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Intersecting Polygon by a Gridded Polygon returns unexpected result

I have a regular polygon grid (grid) and irregular polygons (block). You can download the data here: https://we.tl/t-BczpR2K2lw I want to intersect the orange polygons (block) by the regular polygon ...
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Dividing a polygon into only two equal areas in QGIS

I would like to look at only 50% of the area. To do this, I would like to divide the surface into two equal areas. (Afterwards, I would like to automate it using the model builder). I have followed ...
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Cut polygons with each other based on attribute value

Our organisation have a large number of land use/zoning plans, many of them are overlapping each other. I am currently trying to make some sort of interactive map wich allows users to find out what is ...
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2 votes
1 answer
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Splitting line on intersection to another line using Shapely

I'm finding a solution for split a LineString on intersection to another LineString. My first solution is: from shapely import wkt from shapely.ops import split first_line = wkt.loads('LINESTRING (28....
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5 votes
2 answers
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Getting "QgsPolygon: CurvePolygon EMPTY" when extracting the largest part of MultiPolygon using PyQGIS

There is a shapefile with MultiPolygons, see the image below With this code, I am trying to get the largest part (by area) of each MultiPolygon feature. It utilizes the constGet() method. layer = ...
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Some features have curves and were ignored using Split features tool of ArcGIS Pro

I am using ArcGIS Pro. I have a river buffer (polygon) that I want to split using Split features. The cutting feature is municipality borders. When I use the tool, it says: Some features have curves ...
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Dividing line using polygons from another layer, selecting specific line parts and join attribute

I am having two layers in QGIS; A single line layer indicating a route path (Route layer :red line in the attached pic) A buffer layer derived from a road network line layer (Buffer layer: orange ...
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7 votes
3 answers
242 views

Extracting two last characters (numbers) doesn't work properly in QGIS

I have the string CBG/FON/BCK-STO/A1/FDJ10 and I would like to extract the 2 last numbers (sometimes one, sometimes three). I found some hint here: Splitting string (the last digits) in QGIS but it ...
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ST_Split doesn't split line even when ST_Intersects returns true

I am trying to split a LINESTRING at a MULTIPOINT using ST_Snap to improve robustness of ST_Split as mentioned in the official documentation. ST_Intersects returns TRUE for the exact same geometry ...
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2 votes
1 answer
139 views

Breaking donut polygons into single polygons without an interior ring whilst maintaining the polygons shape?

I have created a new dataset working with a predefined (and enforced) methodology that creates complex geometries that may have many interior rings making them donut polygons. Some shapes may be ...
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Subdividing very complex and big road polygon data into almost equal sized pieces while also dividing vertically depending on the width

This is a follow up question to the previous one I asked here. The solution explained there works pretty well for a small portion of the dataset I've got where there is no roundabouts or holes in ...
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Split seamless polygon representing river banks into separate polygons using center lines

I have a polygon that represents river banks. This polygon is seamless for all rivers. And I also have lines of each river. Here is the example of one situation: Is there a way to split the seamless ...
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138 views

How to subdivide road polygons into equal distance polygons while also vertically splitting depending on the width of the road

I'm using QGIS and trying to divide a road polygons layer into smaller polygons, all having the more or less the same length as in the image below I roughly drew. Also, if the road width is above a ...
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Add a new line when split linestring by nearest point using geopandas

I'm trying to write a short script that allows me to split a line shp file by the nearest point. The interesting thing comes in that I also need to create a new small line that comes out from that ...
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After splitting a line into 3 equal parts, the resulting parts are non-continuous. Part 2 [duplicate]

Before I have asked here about how to divide a polyline into 3 equal parts, since when I do it it is divided into three parts of the same size but not continuously. Vince has answered me ("You ...
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50 views

Specify file encoding when using QGIS Split vector layer

I've successfully split a shapefile into multiple shapefiles using the "Split vector layer" tool (Vector > Data Management Tools) in QGIS 3.16.15-Hannover. However, The split shapefiles ...
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2 answers
136 views

QGIS: Polygon split by lines not working?

I have a polygon in QGIS consisting of a dissolved set of shapes. My objective is to split this shape using the lines from a set of Voronoi polygons. To do this I calculated the Voronoi polygons, and ...
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-2 votes
1 answer
54 views

Separating characters using Python Parser of Field Calculator in ArcMap [closed]

How can I separate the characters of a string, for example, three by three with slash letters or dashes and insert them in the Attribute table in ArcMap? abc-def-gh a100-b200-c300
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1 vote
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Renaming layer raster by overlay vector using PyQGIS [closed]

I split my raster .tiff into several rasters using a vector mask. Now I am wanting to rename those rasters by the id of the polygon used to split. How do I rename each raster by the id of the overlay ...
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2 answers
135 views

How to split raster by individual polygons in QGIS?

I have two layers. The first one is a vector layer with a lot of polygons. The other one is a raster layer. I need to extract raster to many rasters by individual polygons of the vector layer. I tried ...
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2 votes
1 answer
88 views

Split polyline to equal parts using QGIS

How can a polyline be split to a number of equally long parts using QGIS?
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81 views

QGIS: Exporting as KML with split vector layer retains all attribute and filepath information visible in Google Earth

I am trying to export features to a KML file so field technicians can view the data via Google Earth since not everyone can operate QGIS and its a bit more user friendly when they just need to be able ...
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QGIS - Splitting a line into unequal segments based on height change

I am writing here to look for other methods/approaches to the task that I am currently undertaking. The task is fairly simple at this stage: Create a set of layers showing the earthworks alongside the ...
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2 votes
1 answer
103 views

Split polygon with West East direction with equal area in PostGIS

This code splits into NS direction but I need to split with WE direction (horizontally): WITH foo AS ( SELECT id,name,geom, blade FROM admin4 CROSS JOIN LATERAL ( SELECT ST_xMin(geom) + (ST_xMax(geom) ...
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1 vote
1 answer
263 views

How to separate the polygons from Multi polygons in QGIS?

I have a polygon (Multi polygon) which contain 5 species data. All are shown by its different ranges. I want to separate them because I want to analyze their ranges individually? Is there any way to ...
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2 votes
1 answer
277 views

Dividing polygon into given number of equal areas in OpenLayers

I'm using a Style with Stroke and Fill to have something like this for Polygon: const feature = new Feature( new Polygon([ xPos.map((x, index) => { return transform([...
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1 vote
1 answer
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Splitting MultiLine or LineString into equal segments of particular length using GeoPandas and shapely

I don't have a license for any software. So, I want to do it in Python. How do I split the multiline or any linestring into equal segments by taking the length as input? This is the code that I am ...
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1 vote
0 answers
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Adding point layer information (point id) after "Split Lines at Points" to the newly split line layer

I have a point layer for a group of roads and a line layer (have directions) for the roads. I need to calculate the distance between two adjacent points on the line layer hence I was thinking of ...
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1 vote
0 answers
40 views

How to snap to a line or extend a straight line in QGIS?

I have one object in my layer, which includes a line segment in itself as part of the overall polygon. I would like to create another line by extending this line outward, in order to cut another ...
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1 vote
0 answers
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Split LineString with MultiPoint - Shapely

I want to split a LineString object at a MultiPoint object. I use the following code to do this. Among other things, I use the functions interpolate() and project() to snap the points onto the line ...
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5 votes
2 answers
504 views

Splitting column with delimiter into multiple columns in QGIS

In Excel we have option called 'Text to columns' to split the data in a column. Is there any option available in QGIS? There is an option which splits data from left or right in QGIS but I want entire ...
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1 vote
0 answers
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Splitting polygon at 100m length intervals in ArcMap or ArcGIS Pro

I am using ArcMap Desktop 10.8.1 or ArcGIS Pro 2.7.1 I would like to know if there is a way to automate splitting a polygon like above at 100m length intervals horizontally as illustrated roughly? I ...
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1 vote
0 answers
50 views

Dividing layer with tracks by individual days in QGIS

I have a CSV file that includes about 150 dates containing tracks for a particular bird. I successfully added it as a layer in QGIS. My question is how can I divide all the dates into separate days?
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4 votes
2 answers
313 views

Splitting line with point layer in QGIS [duplicate]

With two layers, one multiline and one point, I need to split lines who intersect point layer. In example (image), the selected line is unique but I need 11 lines cut at point level. How can I do ...
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0 votes
0 answers
25 views

Splitting polygon based on area m2 into multiple areas using QGIS? [duplicate]

I have version 3.4.15 of QGIS. I tried to use the split polygons plugin to split an area of ​​1000m into several surfaces. Ex: 300,200,500 ... and I received an error. Traceback (most recent call ...
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1 vote
1 answer
40 views

Using line split (v.split) in QGIS

I’ve been trying to split lines with certain length to extract those vertices. Alt ought, when I try v.split and it creates a new shapefile, nothing is drawn and the attribute table is empty. I had ...
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3 votes
1 answer
2k views

"No features were split:" error when using Split Features tool in QGIS

I want to split a fairly large polygon with the Split Features tool from the Advanced Digitizing Toolbar in QGIS. However, I get an error: No features were split: If there are selected features, the ...
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