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Questions tagged [vertices]

Also known as a "nodes", the points specifically used to describe a polygon or polyline in a "vector" or "linestring" representation.

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Get a list of the points of a QgsPolygon, using Qgis PyApi [closed]

I need to isolate the points of: <QgsPolygon: Polygon ((-56320.23199007755465573 -166518.30815678663202561, -56565.95430758487782441 -166969.12154244974954054, -56042.58511950822139625 -166945....
João Marnoto's user avatar
0 votes
1 answer
74 views

Removing end vertices of a line vector in QGIS

I have a line layer in QGIS that I have digitized on the basis of a PNG file. This layer includes main lines and many secondary lines. I would like to remove these secondary lines automatically and ...
Fabi's user avatar
  • 85
0 votes
0 answers
80 views

How do I stop vertex jumping when editing line features in QGIS with shapefiles?

I've been using QGIS 3.34 (previously 3.28) for editing shapefiles containing line features. However, I've encountered a persistent issue: occasionally, while editing a feature, a vertex from a ...
Schlicker's user avatar
2 votes
0 answers
36 views

Generating cumulative M-values in QGIS

I have a linear dataset in QGIS each vertex in each line has an X, Y and Z values. I want them to have M values. There is a set M value tool but it only seems to set a single value to each vertex i.e. ...
Fritz's user avatar
  • 21
0 votes
0 answers
25 views

Get vertex of SDE.ST_GEOMETRY polygon using SQL

Oracle 18c 10.7.1 EGDB: I want to write a SQL query that has rows with the XY coordinates of each vertex of an SDE.ST_GEOMETRY polygon feature class. I can do it for a line FC using a cross join, a ...
User1974's user avatar
  • 1,172
0 votes
1 answer
28 views

Real Time Area calculation while drawing polygon in ArcMap

How can I visualise real-time area while drawing a polygon in ArcMap 10.8? I mean, when we draw a polygon in Google Earth Pro, it shows real-time area with each drawing vertex.
Raja Fahad's user avatar
1 vote
0 answers
63 views

Removing the split between merged polygon in QGIS

I merged two polygons within one shapefile and then aligned all the vertices so that they were adjacent, but how do I remove the former edges that bisect the polygon so that the geometry is continuous?...
MapDeath's user avatar
  • 341
7 votes
2 answers
187 views

QGIS functions: aggregate and array_foreach not working for vertices

I have two layers as the whole project in EPSG:4326: polygon layer of countries linestring layer of routes I want to concatenate the country names (those are stored in "name" attribute) ...
Kluuboo's user avatar
  • 71
2 votes
1 answer
97 views

Get the outline of badly optimized polygons (too many vertices?)

I'm trying to get the area of some flooding data. Overall, the dataset is huge and hardly to handle in QGIS. The dataset comes in several shapefiles ranging from 60 Mb to 4 Gb and include several ...
Waynenation's user avatar
2 votes
1 answer
122 views

Exploding lines with PyQGIS [closed]

Are there ways to realize exploding lines through PyQGIS? I have layer with very complicated line and exploding lines is so slow, it doesn't end even after an hour. I've created spatial index and run ...
redhat's user avatar
  • 347
2 votes
3 answers
158 views

Creating polygon from vertices with QGIS Geometry Generator

I have a point shape with the following structure: What I want is to know if I can draw the polygons through the QGIS geometry generator. The separator of the polygons of another is in the "NO&...
Gab De's user avatar
  • 21
0 votes
0 answers
18 views

Access control point vertices using SQL

ArcGIS Pro 3.2.1; Oracle 18c 10.7.1 EGDB; SDE.ST_GEOMETRY Regarding control points: Video: Suppress symbol effect in ArcGIS Pro Introduction to control points CIMGeometricEffectAddControlPoints Class ...
User1974's user avatar
  • 1,172
0 votes
0 answers
26 views

How to merge three lines with correct start vertex

I have a feature class with three lines intersected at one point. I'm trying to create equally spaced points along lines. I used "the Generate Points Along Lines " Tool which points will be ...
Monican's user avatar
1 vote
0 answers
33 views

How do I make all polygon vertices show up even when vertex editor is turned off in QGIS? [duplicate]

As I am digitizing a georeferenced map I'd like to always see all vertices rather than only when I hover my cursor over individual ones with snapping options turned on. I am making a lot of vertices ...
MapDeath's user avatar
  • 341
0 votes
1 answer
159 views

Simplify multipolygon in Google Earth Engine

I am working on Google Earth Engine and trying to simplify a multipolygon by first reducing its vertices and then removing unnecessary polygons that have fewer than 5 vertices. var gaul = ee....
Faisal's user avatar
  • 3
1 vote
0 answers
63 views

Separating intersecting lines in QGIS

I have a project in QGIS where multiple cables follow different paths using specific points as vertices, and sometimes the cables end up crossing over each other. I would like to perform a ...
João Monego's user avatar
1 vote
1 answer
123 views

Editing in QGIS vertex tool

By opening a multipolygon shape file, and enabling Vertex Tool (under Edit->Edit geometry) am able to see the X, Y coordinates of the points making the polygon. When i use Vector->Geometry Tools-...
Zipshit Saikia's user avatar
6 votes
1 answer
307 views

Finding number of lines touching intersection point in polyline layer using QGIS

I am trying to calculate the number of lines touching an intersection point to calculate the number of 3-way, 4-way (etc) intersections within my polyline layer. E. g. when 4 lines are connected to an ...
marla's user avatar
  • 71
0 votes
0 answers
59 views

How to clean polygons with too much nodes outside of them? [duplicate]

I have a layer of MultiPolygon, some of them have too much nodes resulting to this : Is it possible to automatically delete the nodes that makes extra lines in my polygon or I am doomed to clean it ...
Lou 's user avatar
  • 11
1 vote
2 answers
125 views

Adding vertices (in QGIS) on segments where other nodes (from same layer) snap to it

I've started drawing a routing network but realised after finishing it that it doesn't work without nodes at all intersections. "shortcut" lines were used to join the main routes together, ...
JdP's user avatar
  • 39
0 votes
0 answers
188 views

Creating a centerline of polygon by using QGIS built-in algorithims algorithms

In the last few weeks, I have discovered different ways to retrieve the center line of a polygon in QGIS. I am working on an urban Digital Twin. On this project I am focussing on adding more detail ...
Yosri Sem's user avatar
1 vote
1 answer
210 views

How to change vertex order to a polyline in QGIS?

I'm trying to change the vertex order of a polyline in QGIS. I have an existing polyline that's closed (last vertex = first vertex). The starting point of this polyline is in a totally casual position....
niubii's user avatar
  • 13
0 votes
0 answers
25 views

QGIS - Insert vertices on the straight line of the sides of a polygon with a specified distance

I have a square polygon, which has four sides and four vertices at its corners. But I need to insert vertices on each of the sides with a specific distance interval (every 100 meters or every 250 ...
MrShaggy87's user avatar
5 votes
2 answers
219 views

Ordering points when making line in QGIS Virtual Layer

I've got a QGIS point geometry layer with four point features and a numeric field sequence. I want to create a virtual layer joining these points into a line geometry layer (which will have one ...
Spacedman's user avatar
  • 65.1k
0 votes
0 answers
88 views

Copy-Paste values in the vertex editor table

I have some polygons with z values for each node. However, there are a great number of nodes that don't have a value. I have to fill these nodes with a value, but I don't want to copy paste for each ...
JoanB's user avatar
  • 143
4 votes
2 answers
478 views

Smoothing corners in polyline using PyQGIS

I have an array of QgsPointXY that makes a line with lots of vertices. How can I round the corners? Here is what I mean: The code is: def __round(line: list[QgsPoint], radius: float) -> ...
Alexander Petrushyn's user avatar
4 votes
2 answers
137 views

TypeError when extracting vertices based on selection in QgsProcessingFeatureSourceDefinition using PyQGIS

I want to extract 70% of the vertices based on a selection but I get the following error code: Traceback (most recent call last): File "C:\PROGRA~1\QGIS32~1.1\apps\Python39\lib\code.py", ...
Sander Van Beuningen's user avatar
0 votes
0 answers
57 views

Automatically Locating Missing Vertices then creating on Adjacent Polygon or Polyline in QGIS

I have 2 polygons. After the simplification and alignment using Snap Geometries to Layer tool, I want to have same vertices on adjacent polygons or polylines. Because of running the required tool, the ...
SA_417's user avatar
  • 11
-1 votes
1 answer
474 views

QGIS new versions 3.28, 3.30... One part can not be selected, vertexes too, can't work with multi polygons, One part is "Hole lies outside shell"

I am currently stuck on working with polygons with QGIS versions from the new patches with the new styles (3.28, 3.30, maybe 3.26 too etc...) When I used previous versions of QGIS, for instance 3.16 ...
Viktor's user avatar
  • 9
0 votes
3 answers
94 views

Posting XY values near polygon vertices in ArcGIS Pro [closed]

I am trying to post in Map view (AGP) XY values near vertices of a polygon. I have tried converting polygons to points but then it gives me only 1 point in the middle of the polygon, if however all ...
Marin Mirošević's user avatar
1 vote
0 answers
116 views

Automatically label vertices of a selected polygon in QGIS 3 Map composer

I am looking at how to automate my repetitive tasks. So How can I automate the labeling of vertices of selected plot in QGIS3? And is it possible to have all the labels outside the polygon? See image ...
Mataa Mafelomale's user avatar
7 votes
4 answers
334 views

Mass removing vertices from line layer in QGIS

How do I remove all vertices except for the last 2 from a whole layer of lines? Currently, for each line I have to right-click it, and then delete all vertices manually until I'm only left with 0,1. ...
David's user avatar
  • 73
2 votes
0 answers
40 views

Vertex pulling problem [closed]

I tried 3.18 , 3.22.8, 3.28.6 in QGIS versions, I have the same problem in all of them. When I pull the vertexes, sometimes it gets stuck like this, it selects other points. What is the reason for ...
barış manço's user avatar
2 votes
1 answer
429 views

In QGIS, accessing and modifying via Python the polygon vertices manually selected via Vertex Tool

Working with QGIS 3.28, I am trying to find out how could one use Python to access and modify the vertices of a polygon that were selected manually (via mouse) using the Vertex Tool. Despite all my ...
hannah's user avatar
  • 21
0 votes
0 answers
57 views

Calculate distance matrix in km units not degrees

I need to calculate the distance of England crimes to the Uk coast. I have a shapefile of the outline of the coast and extracted the vertices. So then I can input the crimes to the coast in distance ...
Squish Squash's user avatar
5 votes
1 answer
186 views

Why angleAtVertex() returns different value than angle_at_vertex in Field Calculator using PyQGIS

When using angle_at_vertex($geometry,0) 324.022 in the Field Calculator of QGIS the values seem correct from a visual check. However when using feature.geometry().angleAtVertex(0) 5.616644978134382 ...
maxwhere's user avatar
  • 1,158
1 vote
2 answers
415 views

Connecting the boundaries of two polygons

I have a number of polygons with a section of 'empty space' between them, like this: They are set up on the same layer, with different entries in the attribute table. I'm looking for a way to join ...
user avatar
2 votes
1 answer
516 views

Extract vertex coordinates of a polygon on a map in QGIS

How can I extract the vertex coordinates of a polygon on a map into CSV using QGIS?
Haleplisk's user avatar
6 votes
2 answers
320 views

Assigning IDs in regular point layer using QGIS

I have a uniform point layer generated by using the Regular Points process. My goal is to connect (draw a line to join) a certain number of points in this points layer in a snake pattern. My current ...
WFL.GIS's user avatar
  • 157
3 votes
1 answer
200 views

Create polygons from opened/overlapping lines

I have a huge amount of lines indicating boundaries of certains areas but they are most of time "opened" sometimes they do not have common vertices and sometimes are overlapping. I want to ...
Eppesuiga's user avatar
2 votes
2 answers
219 views

How to unsplit/dissolve/merge lines with correct start and end vertex?

I am trying to create stream polylines with ArcGIS 10.8 from several stream segments so that the first vertex of the resulting polyline is in the beginning of the stream polyline and the last vertex ...
MarkoV's user avatar
  • 31
3 votes
3 answers
370 views

Why simplify algorithm has no effect on input in QGIS?

I have a LineString layer that I need to reduce the number of vertices. For example, some straight lines have intermediate vertices that add no value and should be removed. A slight loss of accuracy, ...
I have no idea what I'm doing's user avatar
2 votes
1 answer
131 views

Missing indices when extracting vertices and edges from polygon

Given a polygon with holes from shapely.geometry import Polygon import geopandas as gpd # Polygon exterior: p = [[20,767],[54,744],[107,707], [190,654],[265,609],[363,548], [462,484],[514,447],[603,...
arkriger's user avatar
  • 337
0 votes
1 answer
523 views

Polygon to vertices and edge indices

Lets say we have a polygon and need the vertices and edges. import geopandas as gpd from shapely.geometry import Polygon lat_point_list = [50.854457, 52.518172, 50.072651, 48.853033, 50.854457] ...
arkriger's user avatar
  • 337
1 vote
0 answers
29 views

Creating lines with multiple vertices from CSV file in QGIS [duplicate]

I want to draw a line with the points as vertices, the stretch name is also given. This is merely a snippet of a larger dataset, is there any tool in QGIS which will convert these vertices into a ...
Dibyajyoti Basak's user avatar
0 votes
0 answers
75 views

QGIS for mapping building vertices

Can QGIS be used to map a set of x, y points that layout a building? And if so can it correct errors where vertices might be slightly out by pulling those which are close together? I am considering ...
berimbolo's user avatar
  • 101
5 votes
3 answers
728 views

Deleting vertices inside polygon area in QGIS

I am trying to remove vertices inside a polygon area which do not form an outside boundary to the polygon. Example picture below with the vertices to be removed in red markings. Deleting the vertices ...
gishelp's user avatar
  • 51
2 votes
1 answer
335 views

(QGIS) Unable to change shape of polygon

I am failing to change the shape of a polygon I just drew. I need to enlarge it by moving one or two vertices somewhere else. I have selected the shape, toggled edit mode on, selected the Edit Node ...
Barbara Perez de Araújo's user avatar
1 vote
0 answers
105 views

Taking vertices and using point to path creates a mess, how can I snap the lines to roads?

I’ve tried points to path (and various other processing tools) however I end up with this: When really it should look more like this line string (without the gaps separating chunks of road here and ...
IceBear123's user avatar
1 vote
1 answer
162 views

How many vertices does a SDE.ST_GEOMETRY rectangle have?

SDE.ST_GEOMETRY; Oracle 18c; 10.7.1 EGDB How many vertices does a SDE.ST_GEOMETRY rectangle have? (Drawn using the rectangle construction tool in the Create Features pane in ArcMap 10.7.1.) The ...
User1974's user avatar
  • 1,172

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