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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5
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2answers
83 views

Moving two layers with different geometry at once with snapped vertices in QGIS

I would like to be able to move two layers that look like you see below: Basically, when I move the polygon object, to which the lines are snapped as a separate layer I want them to be intact at the ...
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0answers
33 views

I cannot save vertex editing in QGIS 3.16

I am trying to adjust the vertex of polygons so ensure it matches the reference polygon layer. Snapping tool is ON, and tolerance is 6. However, after dragging the vertex of one polygon to the corner ...
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2answers
66 views

QGIS: Bind polygon feature location to attributes

What I would like to achieve: A polygon feature, where the location (x,y) of one vertice ("anchor vertice") is defined by two attributes, attr_x and attr_y. The remaining vertices should be ...
5
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3answers
79 views

Mass editing of polygon vertices in shapefile in QGIS

I have a shapefile that contains 10s of thousands of individual four-sided polygons, so I have 5x that in vertices. I need to be able to update the coordinates of every single vertex based on a new ...
1
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1answer
52 views

Query for ST_Geometry line vertices via a recursive SQL WITH clause?

I'm exploring ways to get ST_Geometry line vertices as individual rows in a query resultset (via Oracle SQL). The reason being, ST_Geometry doesn't have a GetVertices function (see ESRI idea here). ...
1
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1answer
35 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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2answers
73 views

ST_PointN equivalent in SDO_GEOMETRY?

In SDE.ST_GEOMETRY, we have a function called ST_PointN: ST_PointN takes an ST_LineString and an integer index and returns a point that is the nth vertex in the ST_LineString's path. sde.st_pointn (...
1
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1answer
42 views

Selecting column in data attribute table reliant from different column

I have the problem because after extracting vertices from my linear geometry layer I have so many duplicates in my data attribute table (taking into account a unique "ID" of each line). ...
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0answers
28 views

Adding vertex without moving cursor

I am trying to add a vertex to a shape without moving the cursor. Using the vertex tool, I double left-click on the line and then left-click a third time. If it is a temporary scratch file, it works ...
6
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1answer
118 views

Permanently viewing vertex of polygons in QGIS

I work with shapefiles in QGIS 3.20. I have many polygons and I need to see their vertices. How do I show the vertices on the polygons? I have gaps between polygons shown by the topology checker. I ...
1
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1answer
33 views

Split lines by minimum number of overlapping/shared vertices

I have a line layer converted from a polygon layer, and I do not know how to split the lines at vertices which overlap vertices of at least 2 other features. In the image below, I want to split the ...
1
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1answer
45 views

Getting coordinate vertices of a polyline in QGIS

How can I get the (x,y) coordinates of the vertices of a polyline in QGIS? I do not find the function in the field-calculator I can find the coordinates for each point, but I am not able to highlight ...
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0answers
28 views

Delete or Join adjacent vertices

QGIS Zurich 3.18 Win10. I need to trace and create one polygon from a large area by following actual field lines that do not follow straight lines. As panning and scrolling often triggers a completed ...
5
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2answers
190 views

Topological editing of vertices that are common in two adjacent polygons in QGIS

How do you edit vertices that are common in two adjacent polygons in QGIS? I tried to select both polygons but when editing the vertex moves only in one polygon and not in both.
3
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2answers
115 views

Adding vertices along adjacent polygon vertices in QGIS

Is there an automated process in QGIS to add extra vertices to a polygon based on adjacent polygons vertices? For example, this polygon has more vertices than the next one on the common boundary. I ...
3
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0answers
29 views

Change number of default vertices in circles

I would like to change the number of default vertices per quarter circle QGIS creates/uses when running tools. Background I need to do some area calculations for circles and polygons containing curves,...
1
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1answer
85 views

How to create a straight line from start and end vertices of a line using Qgis?

I want to create a straight line from two vertices of a line which are not straight, but I should be getting a straight line joining the start and end vertices of this curve line. I want to attain ...
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0answers
38 views

Disabling annoying Vertex Editor Panel in QGIS

Is there a way to disable the Vertex Editor panel popping up, saying "Right click on an editable feature to show its table of vertices"? This panel should be visible on demand, i.e. when you ...
0
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1answer
50 views

Record time for each vertex of line in QField

I use QField 1.9.5, and QGIS 3.16, and I use GeoPackages to record vector data in QField. I use a line layer to record my track. I also use QField to record photographs taken with my tablet as points. ...
0
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1answer
22 views

vertexInfo properties in ArcGIS JS 4x API for event when reshaping polygon

When dragging a polygon vertex using the Sketch class, the update event is fired, with a type of "reshape". 4X: sketch.on("update", onGraphicUpdate); function onGraphicUpdate(...
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0answers
70 views

Reducing shx file size using QGIS

I have a shp with size 673'476 KB, with shx size 192'422 KB (as shown in the picture below). This file is with points. Is there any way that can I reduce the shx file size using QGIS?
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0answers
22 views

QGIS : On layers using my custom function and also having a Rule (Filter) the Vertex Tool is not working

I am using QGIS 3.16. To show my problem in details, I have made a very simple test example : Create New Shapefile Layer File name : Test Geometry type : Line OK Scale : 1:1000 Draw a line id=...
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0answers
85 views

QGIS Vertex Tool not working on some layers

I am making a map in QGIS 3.16. I have made a custom function with the function editor. I have used the function in the styles of 5 layers of my map. When I start QGIS all layers load correctly with ...
4
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3answers
112 views

Replacing part of polygon in QGIS

Using QGIS 3 I'm having difficulty with what seems to be a simple problem: for each US state and Canadian province with a coastline (on Shapefile maps I downloaded), replace the coastline segments ...
3
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2answers
231 views

Automatic removal of an extra vertices lying on a straight line or polygonal segment using QGIS

I am looking for a QGIS tool that would allow me to remove extra vertices on a line or segment of a polygon. By extra vertices I mean vertices that lie on a straight line. The other vertices must ...
3
votes
1answer
118 views

Counting vertices and adding it as number to column using shapely

I have a small DataFrame and created new column. I would like to add to every record in column "vertex_counter" value of n. I have the problem because it is doesn't work and I have in every ...
7
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3answers
269 views

Determining number of vertices of selected object in QGIS 3

How can I determine how many vertices/nodes a selected feature has in QGIS 3?
2
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1answer
64 views

Editing existing polygon vertices to create smooth curves using ArcMap

I'm editing a really detailed polygon in ArcMap. The vertexes of the polygon are connected with an straight line. I want to convert them in a smooth curve. While creating the polygon I use the "...
1
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1answer
160 views

Deleting collinear vertices from polygon feature class using ArcPy

I have a shapefile with polygons and want to write the Python script to eliminate collinear vertices in a polygon. I found a solution for the line feature class, but not for polygon: Deleting ...
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2answers
62 views

Update sister table with vertices as rows (when SHAPE is updated)

I have an Oracle 18c table that has an SDO_GEOEMTRY column. create table a_test_sdo_geom (id number, shape mdsys.sdo_geometry); insert into a_test_sdo_geom (id, shape) values(1, sdo_util....
2
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2answers
83 views

Select vertices, including multi-part number

I have an Oracle 18c table with an SDO_GEOEMTRY column: create table a_test_sdo_geom (shape mdsys.sdo_geometry); The table has a row that is a multi-part feature. insert into a_test_sdo_geom (shape) ...
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0answers
51 views

Why are the new vertex editing protocols not working properly in QGIS 3.16?

I am using QGIS 3.16 to create new shapefiles from existing raster maps (p 225 in the 3.16 User Guide). My new polygons work OK when incorporated into other projects, but I cannot edit them to correct ...
1
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1answer
45 views

Why does SDE.ST_NUMPOINTS() add extra vertices for lines with arcs?

Oracle 18c/10.7.1 EGDB: I have a polyline FC with a feature that has an arc. I want to count the number of vertices in the line using the SDE.ST_NUMPOINTS() function. select sde.st_numpoints(...
2
votes
1answer
72 views

QGIS 3.4 Vertex tool highlight colour change

I can change the colour for selected items fine. I have even figured out how to change the colour of the preview when moving a vertex. How can I change the colour of the highlight when hovering over a ...
3
votes
2answers
151 views

Attaching vertex or polygon to line in QGIS

I want to connect the green polygon and the blue line. The buffer tool is not suitable because it makes the whole shape bigger. I'd like to make longer the length of the green one to attach to the ...
4
votes
1answer
182 views

Removing unnecessary vertices in QGIS

I extracted vertices using 'Extract vertices' in Processing Tool. But so many unnecessary vertices extracted, so I want to remove them. What I want to leave is at the beginning and the end of the line....
1
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1answer
67 views

Generate node / vertex at starting point of line connections

I have line and point layer. I connected line layer with points using connect nodes to line in processing toolbox. After creating a connection line (green color), I used line intersection from ...
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0answers
37 views

How to range vertex select in QGIS 3?

I am a QGIS 2 user and trying to use vertex tool in QGIS 3. I noticed that there is a feature for QGIS3: https://qgis.org/en/site/forusers/visualchangelog30/index.html#feature-range-vertex-selection-...
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1answer
34 views

Selecting snapped vertices of different two features individually by QGIS 3.X vertex tool

In QGIS 2, I can use node tool, click on feature 2 click on the vertex (of feature 2) to select it. Delete it. I QGIS 3, by using vertex tool, I can't select which feature I want to modify, it ...
14
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3answers
711 views

Convert vertices of polygon features to points using Virtual Layer in QGIS

I have a polygon layer and want to use a Virtual Layer that creates points from the vertices of the polygon layer. The question is how to write a query that does this? I am aware of the tool "...
8
votes
2answers
428 views

Displaying vertex coordinates of polygon or line without creating new layer

I am wondering if there is a way to display coordinates for each vertex of a polygon by only using expressions, without creating a new layer. So this question is basically inspired by Displaying ...
7
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2answers
220 views

Change linestring values with GeoPandas

I'm working on a stormtracking project, and I realized that the longitude sign of some values in my GeoPandas dataframe are wrong; i.e. I need negative longitudes instead of positive ones. When I ...
4
votes
1answer
66 views

Automatically join lines by snap

After I smoothed a layer of lines I lost the connection with some vertices. Is there an automatic way to connect the various lines to avoid doing it manually? I think the best thing is to use v....
2
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0answers
92 views

Rotating vertices of geometries in QGIS

I have a great number of area geometries, and line- and point-geometries which have a geometric relation to the area. That means that the distance and the orientation of the lines/points to the areas ...
2
votes
2answers
564 views

Moving multiple points using QGIS

I worked with a photo that is apparently a bit offset. Now I have more then 10,000 points with that offset. Now that I have the correct map I would like to move them all to their new location. Is ...
3
votes
1answer
73 views

Moving point feature and vertex from polyline at the same time

I have two layers in QGIS 3.14: one with point geometry one with polyline geometry The point geometries (p) have the same coordinates as some of the polyline vertices (v): (v)--------(v)----------(v/...
3
votes
1answer
95 views

QGIS - Counting vertexes in radius from each feature in line layer

I am looking to measure the impact of urban green on pedestrian route choice, and in that connection I want to create a new field within a line layer that counts how many trees exist in a radius of 10 ...
2
votes
1answer
34 views

Vertex Order/Initial Vertex in LineString

I would like to change the initial vertex in a LineString, I would also like to change the direction it is "drawn". Are methods available to edit this information? The line is closed.
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0answers
182 views

Create point at every vertices of feature

I have a layer with polygons and one with points at every vertices of polygon ( so I can label them with a number). I want to create a point at every new or modified vertex with virtual layer. At the ...
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0answers
59 views

Bug: QGIS freezes editing large polygon, does not save window or toolbar positions after crashes [closed]

Version: 3.14.15 Activity causing freezing: attempting to delete more than 20 vertices of a 61,000+, complexly-shaped polygon - hangs when deleting as few as 4 vertices Annoyance: layer and browser ...

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