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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Editing 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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51 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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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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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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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 ...
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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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1answer
29 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 ...
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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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Vertices editing / deletion question in QGIS (Blue vs. Red)

I am having an issue in QGIS. I have two sets of lines in the same layer. The layer is in EDIT mode. Using the Vertex Tool, one line appears red (and I can use the tool), but the other line appears ...
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70 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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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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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
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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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245 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 "...
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Displaying vertex coordinates of a polygon or line without creating a 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 ...
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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 ...
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Automatically adding vertices to network in pgRouting

I am trying to add extra vertices based on the intersections of my edges with a polygon to get access points to those polygons, from where I could run pg_drivingDistance. Therefore, it would this way: ...
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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....
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1answer
47 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 ...
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2answers
257 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 ...
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1answer
36 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/...
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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 ...
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1answer
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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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122 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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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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Can't move some vertices when editing in QGIS 3

I have a shapefile in QGIS and I can move some of the vertices using the vertex tool but when I try the same approach on another vertex, it does not work.
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Grouping similar Node links in attribute table of QGIS

I have a situation like this: I have network with nodes (vertices) and points. I extracted the nodes using Extract Vertices in QGIS. After that I connected the vertices with points with perpedicular ...
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Finding if a vertex is located between two edges

I have a data set of polygons which I want to convert to lines in order to measure the length of each line. However, some of the polygons have vertices which are located not in a corner of the shape. ...
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1answer
60 views

QGIS 3 replace set of vertices with another set of vertices, like copy/paste

I have a layer that contains polygons that should be "topologically correct" if I understand that term correctly. The polygons should share vertices of adjacent polygons, allowing no gaps ...
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40 views

Getting vertices of geometry that type is not known?

I am using a WFS service that serves Polygon and Multipolygon geometries. But I do not know ehich ones. So I am converting the wfs response to feature. this.http.get(url, { responseType: "text&...
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Sequential number of polygon vertices by Y coordinate value

I have a shapefile of polygon parcels. Each parcel has a unique id called propertyno. I need to label the vertices of my polygons clockwise sequentially, starting at the most northern vertex in ...
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151 views

How to add z value vertices from a point layer to a line in QGIS?

I created a point layer from a line using Vector geometry/Extract vertices in the Processing toolbox. The purpose is to extract the elevation from a DEM into the points corresponding the vertices and ...
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1answer
95 views

What does the “bisector angle of vertex for original geometry” mean in the Extract Vertices tool?

I need to calculate the number of notches in my polygons. Therefore I need to know the angles of the vertices in a set polygons. I managed to extract a value for the angle by the Extract Vertices tool ...
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1answer
40 views

Calculate length of paths with defined vertexes

I'd like to calculate length of some paths with defined vertexes and each route is characterized by some records. For example, I need the length of all combinations of lines (AB, BC, CD, AD, AC, BD). ...
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Remove vertices coincident with a point layer

Is there any way to delete vertices from a feature which are coincident with a point layer? I mean in an automatic way. I have many lines forming a "T shape", so I would like to remove the middle ...
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22 views

Joining node layers to their containing edge layer with correct IDs

I am not very experienced in QGIS as I have been working on it only as a student. My question has to do with ID matching. I have a line shapefile, which represents roads (polyline tbh), and I have ...
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Vertices only showing up in a small portion of data view when editing

When I'm trying to edit features, or even digitize new features, the vertices or new lines only show up in the bottom right corner of the data view. I've tried restarting ArcMap and making sure only ...
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1answer
122 views

Selecting multiple vertices by dragging box doesn't work

I'm doing a QGIS course at the moment using QGIS 3.10 on a Windows 10 Pro 64bit system at the moment. Settings are default, except for the "filter invalid geometries" option is set to "ignore". With ...
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1answer
256 views

Removing lines inside a polygon

The situation is this: I need to remove the lines inside the blue polygon, I have tried with dissolve and delete holes processing tools but they didn't work. I would like to know if there is a ...
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Extract the last vertex of a road network using QGIS 3.10 [duplicate]

I have a multilinestring layer representing a 10 km service area from a school. I would like to extract the vertices located at the ends of this network. How can I do?
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1answer
229 views

'Snapping to segments' does not work in QGIS 3.10 and 3.4

QGIS 3.x does not let me snap to vertice and segment anymore, only vertices. I changed the snapping options several times in the toolbar and in the options menu. Made sure the correct layers are ...
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2answers
41 views

Auto colour change after changing polygon geometry using ArcGIS Pro

I am using ArcGIS Pro. Is it possible to change polygon colour after i change it's geometry? For example, if there were five vertices, the figure is green, and after i change it to be four vertices ...
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1answer
89 views

Adding multiple vertices in QGIS

I created a new polygon feature in QGIS 3.4 using the add polygon feature tool. I accidentally clicked the right mouse button to finish creating the feature. I want to continue being able to add ...
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1answer
43 views

Measuring length from one polyline vertex to other polyline

I have two polyline which represent the river bank of a particular section of a river drawn based on Satellite imagery at 1984 and 2019. As you can see in the picture, it is drawn in red line with ...
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Can't add vertex to polygon in QGIS3

I'm working in QGIS3.8.3 and am trying to use the Vertex Tool to add a vertex to a pre-existing polygon. I expect to be able to do this in an editing session by hovering over the segment in question ...
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Creating unique points at the start of multipart polylines in ArcGIS Pro

I have polylines from a network analysis representing public transport trips. These are multipart polylines. I need to identify the starting point for each trip. However, using vertices to points to ...
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1answer
154 views

Extract maximum pixel value vertex from a raster for a given grid cell without altering the position of the source location in QGIS

I have a 0.5 X 0.5 metre resolution raster. I would like to extract the maximum value points from the raster for every 2 metre square cell. And the extracted points should be in the centre of the ...
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1answer
404 views

Changing vertex order for polygons in QGIS?

I have this intersection of a polygon, see image below I would like to redraw the lines so they don't cross each other. So, in the end, I would like to have a polygon without self-intersecting parts....
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64 views

Seeking geoprocessing tool for adding vertex at intersection without splitting

I have a polyline shapefile and a polygon shapefile. I need to add vertices to the polylines where they cross polygon boundaries. The polyline length must stay the same, so the Intersect tool doesn't ...
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PostGIS - find vertices on polygons without partners

My goal is to ensure that a set of boundaries have vertices that are co-incident where they intersect by a tolerance of 5m. So I am looking for orphan vertices that are not on an external boundary. I ...

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