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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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 ...
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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 ...
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Looking for QGIS equivalent of ArcGIS streaming digitizing

I am trying to digitize in QGIS 3.14, and I have not been able to find an equivalent to the ArcGIS streaming tool. I was taught to digitize where (you trace the feature with your mouse and nodes are ...
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2 votes
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QGIS focus multiple vertices in one point

I have a bunch of lines, which have been offset. The tool in fact works fine, but I noticed, that the lines end in different places, whereas I want them to be terminated in one place. The image below ...
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Polygon Vertices Pixel are not integers

In a GeoJSON dataset there is the column 'polygon_vertices_pixels'. It says it contains the pixel coordinates of the vertices of the polygon on the matching image. But these values are not integers. ...
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QGIS 3.22 vertex editor snapping placing vertices in wrong location

I've been having a strange issue with my vertex editor over the past couple of days. I am attempting to edit a polygon such that the borders of the polygon line up with a different line segment layer ...
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Simplifying polygon to set number of vertices using ArcGIS Pro

I am working with ArcGIS Pro 2.3 (am able to upgrade to 2.8 if that brings in a new tool I need). Is there a way to simplify a polygon feature class so each polygon has a maximum of 250 vertices? ...
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Attribute rule works in Pro 2.9.2, but not in Pro 2.6.8

I have a calculation attribute rule that works in Pro 2.9.2 (in a 2.9.2 FGDB). It updates the M-values of the polyline’s geometry: function pythagoras(x1, y1, x2, y2) { return sqrt(pow(x2 - x1, 2) ...
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Set M-values as distance: Multipart M-values are set in descending order

I have a multipart polyline in an ArcGIS Pro 2.9.2 FGDB feature class (NAD83 UTM): I can set the M-values to the cumulative distance of the line by using the Set As Distance tool (setting "...
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5 votes
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QGIS geometry editing listener

I would like to know if it's ever possible to make a listener on geometry editing. What I know so far is a geometryChanged signal that can be used in listening to layer when its feature's geometry is ...
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Find polyline end vertex on polyline edge

I am looking for a basic or best approach to find any polyline End-vertex that falls on the polyline Edge. I have a set of polyline data that shows the flow of electricity based on the Start and End ...
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3 votes
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Polygons from lines with manually completed lines using vertex tool and snapping

I have a vector layer of lines (contours) which was a model output. Some contours are incomplete due to land barriers (necessary for the model) which produces something like this I have used the ...
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Select lines by what their starting and ending vertices intersect

I have a set of polylines representing storm drains and I want to select every line that is originating from a structure (a catch basin or a manhole) with field DATASOURCE=GPS, AND terminating at a ...
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Polygon starting point using QGIS

I am using QGIS. If I have a starting line for one closed polygon like an ellipse and the starting 'zero' vertex is on that starting line, when I use Extract specific vertices tool to find it. How can ...
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5 votes
2 answers
159 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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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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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 ...
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5 votes
3 answers
160 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 ...
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1 vote
1 answer
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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). ...
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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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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 (...
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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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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 ...
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6 votes
1 answer
180 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 ...
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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 ...
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1 answer
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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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1 vote
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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 ...
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5 votes
2 answers
278 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.
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3 votes
2 answers
192 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 ...
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3 votes
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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,...
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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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0 votes
1 answer
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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. ...
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1 answer
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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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1 vote
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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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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 ...
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4 votes
3 answers
164 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 ...
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3 votes
2 answers
405 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 ...
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3 votes
1 answer
225 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 ...
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7 votes
3 answers
359 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?
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  • 433
2 votes
1 answer
108 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 "...
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1 vote
1 answer
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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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1 vote
2 answers
93 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....
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2 votes
1 answer
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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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1 vote
1 answer
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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(...
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2 votes
1 answer
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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 ...
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3 votes
2 answers
247 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 ...
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  • 169
4 votes
1 answer
298 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....
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  • 169
2 votes
1 answer
125 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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1 vote
0 answers
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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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1 vote
1 answer
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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 ...
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