Questions tagged [splitting]

Division or partition of geometric features

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28 views

Defining CRS with tifffile - export .tif

I am trying to figure out how to define/keep my images CRS throughout a splitting script I have written. I tried adding metadata={'init': 'epsg:3857'} when calling tifffile.imsave(dir_out, image), but ...
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31 views

QGIS - Split parts only usable once

I'm using Q gis and my question is, how come you can only use split parts tool on a polygon once? The second time throws an error of "Geometry is invalid". What if i want to split a polygon ...
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1answer
33 views

Split polygon into smaller polygons based on areas that are covered by lines in ArcGIS Pro

I am trying to split a map of an island into attribute (primary substation) areas in ArcGIS Pro. I have network locations (lines) which I have split into primary substations (as shown by the image ...
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1answer
34 views

SpatiaLite splitting large polygons from imported shape file into multiple rows

I have this shapefile: shapes.shp in which I have imported in SpatiaLite using this command: spatialite_tool --import --shapefile shapes --db-path db.sqlite --table shapes --charset UTF-8 --srid 27700 ...
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1answer
38 views

Shapely strange splits when splitting LineString and Polygon

I noticed a strange behavior while splitting a LineString with e Polygon: in the below image I have a Polygon (in green) and two lines. If I split the blue Linestring with the polygon the result of ...
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50 views

Accuracy problems with 'Feature To Polygon' in ArcGIS 10.7?

I have a question regarding the accuracy of Feature to Polygon in ArcGIS 10.7. My data is available here. I have a glacier shapefile and a polyline. I want to split the glacier using the line feature ...
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0answers
90 views

Split Raster Missing Data

I have a code that will read a .tif and split the image into a specific number of rows and columns (code 1). I modified it to be able to be able to easily set the wanted image size (by pixels) (code 2)...
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2answers
44 views

Splitting line GeoDataFrame basing on given lengths

I am trying to split line GeoDataFrame into sections. I have lengths on which splits should be made stored in column. My idea was to generate points along the line using shapely.ops.interpolate and ...
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1answer
30 views

QGIS Create Feature for closed Polygons

I have one single layer that consists of different polygons. In the attribute table all the polygons are summarized in one feature (see picture for both). I am looking for a way to split up the ...
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2answers
54 views

Splitting raster by polygons and defining output names using ArcMap

I need to split a raster file (DEM) by 2310 polygons (these are boundaries) using ArcGIS for Desktop. I used the Split Raster tool but I have no control over the naming of the output rasters. They ...
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1answer
99 views

Changing values​ ​in attribute table and split it into different columns?

How to change the values ​ ​in the table and divide it into different columns? I have an example I want to get a result
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1answer
32 views

Merge polyline feature at vertex intersection based on segment count [duplicate]

I have a Polyline layer in QGIS which is split into multiple segments using the explode lines tool (the black lines in the image). There are nodes created from the 'extract vertices' tool (the red ...
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37 views

Polygon Divider QGIS Plugin creates less equal parts (polygons) than asked

I've installed QGIS 3.16 for Windows. I digitised a polygon layer (limits of a city) and used the Polygon divider plugin to divide it in 10 equal parts (polygons). However, as a result, it created ...
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35 views

Divide polygons based on internal differences in shape using PyQGIS

For my research, I'm trying to assess where we could potentially plant small, medium and large trees (with respectively 5m², 20m² and 45m² soil area needed). Besides patch size, also patch shape is an ...
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2answers
171 views

Self split geopandas Linestring geodataframe in a fast way without loosing all attributes

I have geodataframe of many LineStrings. The LineStrings intersect but are not split at those intersections. My current solution to achieve this is from here: network = gp.read_file(filenameNetwork) ...
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1answer
29 views

QGIS -Split vector layer tool not generating an output

I'm trying to split a vector layer into new layers based on one field. The field is string type but when I run the tool, a message saying 'Creation of field fid failed (OGR error: Wrong field type for ...
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0answers
47 views

Postgis - Splitting polygon with line returns different size polygons that creates holes/overlaps

It feels like I've been struggling with this 'simple' problem for years, hopefully it is just a noob mistake.. We are using Postgis to facilitate an interface we wrote to do spatial editing, like ...
2
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1answer
73 views

Commit error when splitting several polygons with “array type” attribute (PostGIS / QGIS)

I have a simple PostGIS table : CREATE TABLE public.elem_p ( gid integer NOT NULL DEFAULT nextval('elem_p_gid_seq'::regclass), liste character varying[] COLLATE pg_catalog."default" ...
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2answers
97 views

Splitting rectangles into 2 triangles using Geometry by Expression in QGIS

I am using QGIS 3.10. I am trying to split multiple rectangle polygons diagonally into 2 parts using "Geometry by expression" under Processing. This is for symbology only (exporting for use ...
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40 views

Split features maintaining ordnance survey map details in QGIS

I'm trying to split a polygon drawn over an ordnance survey map area that represents the total land of a farm, in order to create smaller polygons that represent individual fields. I wish to create ...
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9 views

Using splitRaster in ArcGIS Pro outputs dark JPEGs, bright PNGs

I am using the splitRaster function to create 10m x 10m JPEG files from a GeoTIFF, inputting a fishnet grid as a polygon to clip it by. I have figured out the problem of the depth changing between ...
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2answers
106 views

How do I precisely select lines within a polygon in QGIS?

I want to select lines (bahnstrecken) within a polygon (bundesland). My goal is a selection shown in the following screenshot, which I did manually. Before I used two tools: I converted the polygons ...
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1answer
29 views

Splitting lines at certain lengths in ArcGIS ModelBuilder

How to split lines at a certain length in the ArcGIS ModelBuilder using below the split tool from the Editor Toolbox?
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28 views

Split lines and sequentially number each fragment in QGIS

I have a line layer representing watermains that I need to split long lines into sections. Each line has a unique ID number, but upon splitting a line this attribute is no longer unique as the ...
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1answer
49 views

Splitting one line into two segments in QGIS using Split Features

I have a line. It is one feature. I want to cut it in two, so that it becomes two features. When I use "Split Features", after enabling editing, by drawing a cutting line across the line ...
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26 views

QGIS: Splitting layer into individual shapefiles with the attribute as the shapefile name

In QGIS 3.14 I have created a layer containing multiple polygons from x/y coordinate data, but I now need to split those ploygons into individual layers/shapefiles by their different attributes - ...
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0answers
20 views

Part of feature belongs to wrong feature [duplicate]

Is there a quick way (without having to create new layers) to make the island circled in the bottom left a part of central america (dark blue) rather than a -part of Central France (yellow)?
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44 views

For some reason one polygon in a shapefile is hidden behind another. How to solve this?

In this photo, you can see that Great Brittain consists of two features. London and the rest. Problem is that London doesn't show as a separate colour. When I select great brittain, the area where ...
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1answer
58 views

shapely split function does not work on short lines

I am trying to split a line with multiple points. I adopt the solution in here, but sometimes it does not work. from shapely.geometry import LineString, MultiPoint from shapely.ops import split line =...
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1answer
104 views

Splitting up QGIS layer into multiple using QGIS

I have a layer (GeoJSON) with multiple features. I want to split the shapefile up into multiple shapefiles using QGIS. I don't want a file for each individual feature. Is it possible in QGIS to select ...
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0answers
41 views

Detaching part of feature without detaching all parts from each other?

On this map, Denmark and Greenland are one feature, and I need them to be two features. How do I split them apart? If I use Singlepart to Multipart, I create a new layer where there is a feature for ...
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1answer
168 views

QGIS: Using Split Vector Layer how can I name the new files based on the unique value?

I'm using Natural Earth 50m data and I want separate country shp layers so I can export to Illustrator. I can classify by Long_Name easily. I can Split Vector Layer on Long_Name easily. What I can't ...
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36 views

Dividing country into regions based on some initial center point using ArcMap

I am new to GIS. I have some lat-long (say 5) spreads across a country and I want to make polygons around each point such that all the polygons cover the whole area of the country and within the ...
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1answer
50 views

Splitting DEM based on elevation using ArcMap?

I am trying to split a DEM TIFF file into three separate shapefiles (upland, middle and lowland) on ArcMap 10.6. I have used natural breaks to classify the DEM into three elevation categories. How do ...
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0answers
46 views

Splitting lines at multiple points in ArcGIS

I have two shapefiles: First shapefile consists of lines features (approx 1500); it represents the public transport lines Second shapefile consists of point features (approx 3000); it represents the ...
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0answers
33 views

(QGIS) Splitting vector polygon layer with vector line layer [duplicate]

In QGIS, I have a layer of polygons (land parcels) and a layer of lines (outline of planned street). Can I slice the polygons along the line, creating new polygons from the "detached" parts? ...
2
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1answer
63 views

Split a polygon 56% west, 44% east

Using ArcMap 10.6 with the Basic license, I need to split our district boundary into two sections. The west side needs to be 56% of the area, while the east side is 44% of the area. Also, our district ...
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1answer
114 views

Saving output from splitvectorlayer processing as shapefile with PyQGIS

I'm working on a plugin wich works on both QGIS 2 and QGIS 3. This plugin can perform a qgis:splitvectorlayer if the end user wants to. As .gpkg is the default format in QGIS 3 and i don't want end ...
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3answers
202 views

Automatically dividing multiple polygons into halfs

I have this shapefile with multiple polygons (equally sized hexagons). My wish is to divide all hexagons by two. The goal is then to have two layer, one layer with all the left half of the hexagons ...
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0answers
34 views

Splitting regular polygons into same-height segments [duplicate]

I have vector layer which looks like this: It is result of raster classification, vectorization and finally Minimum Bounding Box Geometry. What I need is, that maximum "height" of one polygon is for ...
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1answer
67 views

Split line at newly created point feature

I have one Point layer and Multiple line layers. I always wants to Maintain Topology between them. For which, If user adds any new feature in Point Layer, exactly snapped with line feature, the line ...
2
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1answer
79 views

Splitting population data proportionally using Identity tool of ArcGIS Desktop

I am preparing a term project and I have the vector data of the roads and zones layer for to prepare rural access index in Istanbul. My zones layer also has the attribute nufus17 which means ...
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0answers
53 views

Split polygon by polygon

I have a polygon which I want to split using overlapping polygons in order to create 3 polygons (with the original attributes) How can i achieve it using R ?
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3answers
110 views

Splitting map, island tied in same polygon as mainland using QGIS

I have a map originally as a shapefile. The map includes a country (mainland) and an island far away from the mainland. I want to cut the map so that only the mainland is shown and save it again as a ...
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0answers
114 views

Split lines at vertices based on length and angle in QGIS

I have polyline data that represents watermains. I want to break polyline features up based on some point layers to input into another software package - the points represent valves, fittings, etc. ...
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0answers
70 views

Splitting polygon in half with lines in QGIS 3.12

I have a polygon and a line, I want this line to split the polygon in half, i.e the same thing I could manually do with "Split Parts". I have tried every Geoprocessing tool; most answers I found ...
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0answers
23 views

How to Split building outlines polygon into individual features/buildings?

Like the title suggests I have ONE Building Outlines Polygon where instead of all the buildings being split into their own features they are all in one feature. How can I split these into individual ...
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0answers
50 views

QGIS 3.12 - How to divide Polygon even areas

I'm trying to divide a 5ha paddock into .5ha "cells". In QGIS terms I'm looking to subdivide an irregular polygon into sub-polygons which will have the same area inside and as near as possible ...
2
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1answer
22 views

Feature splitting when pasted into another shapefile

Using QGIS I was trying to copy a 2 part feature into another shapefile as a single entity. I was able to create a single feature the way I wanted it. I then attempted to copy and paste it into the ...
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0answers
20 views

How Should I convert a multi parts feature in a polygon layer to the multi features? [duplicate]

I have a multi part polygon in QGIS consist of three parts. I would like to split this to three separated features with the same attribute. How should I do this?

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