Questions tagged [nodes]
The nodes tag has no usage guidance.
79 questions
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V.Net.Salesman Unreachable Nodes at Intersections
I'm designing a network that has a layer of locations and a layer of street segments. I need to design a route to connect these locations along the street segments using the shortest route possible. ...
1
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1
answer
101
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Counting outgoing links connected to a node [closed]
I've a large linear shape and I need to find all nodes with class >=3 connected to at least two outgoing links.
It's actually a sewage graph, I'm trying to identify sewer dividers.
I have read ...
- 21
2
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2
answers
58
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Direction arrows (or lines) at node
I've got a set of lines "passing through" a node.
The passing links are directional (not all possible combinations) I want to make arrows (line with marker) for each node to display what is ...
- 131
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55
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No path found between two points
I'm trying to find a path between different pairs of points,
But within the thousands of pairs tried only a few actually result in a path.
I find this odd but maybe it's normal.
(note that when I'm ...
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4
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1
answer
769
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Retrieve map matched ways (and not just nodes) using OSRM and Overpass API
For my question I have prepared a jsFiddle demo requiring you to click at the map 5 times:
If I understand this correctly, the OSRM does not care about ways.
It only cares about nodes and their ...
- 257
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1k
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Overpass API query to retrieve way ids given a list of node ids
Given a list of node ids returned by an OSRM map matching query I am trying to find a list of corresponding way ids:
{"nodes":[384845483,3831831361,2628299968,502266756,346268605,373873712,...
- 257
2
votes
1
answer
173
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Nodes returned by OSRM map match service not found in the PostGIS database
The call to OSRM map matching returns a list of nodes:
{"code":"Ok","matchings":[{"confidence":0.000854076,"geometry":{"coordinates":[[8....
- 257
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105
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Issue with xml.etree.ElementTree while writing GeoPandas nodes data into OSM format
I have sample nodes data like below. I am writing geopandas into osm data using xml.etree.ElementTree but the end output is not matching the nodes format that is described in osm data. Actually at ...
- 145
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1
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46
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Name arcs and nodes of a network of roads using only roads names
I have a network of roads composed of arcs (segment of road connecting two intersections) and nodes (intersection of two or more roads). Each road, which is composed of one or more arcs has a name (e....
- 939
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31
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Converting shapefile to digraph [duplicate]
I have used '''nx.read_shp''' for converting shapefile to network, but the result I am getting is quite different from how the actual shapefile looked like.
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67
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Removing nodes of polygon inside other polygons in QGIS
I have a shapefile with numerous errors of this type (see img. 1), i.e. polygons inside other polygons consisting of a few nodes.
I have tried repairing the geometries with the tool and it doesn't ...
- 317
2
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1
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887
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Counting nodes and edges in road network
I have a road network 'TR_ROAD' with EPSG:4283 crs and 1219 features. Based on geospatial theory, the road network is combination of nodes and edges.
I am trying to count the number of nodes and ...
- 865
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1
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1k
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Seeing which node has given node ID in osmnx [closed]
I have been reading the documentation on OSMnx and I am trying to use the command osmnx.shortest_path(G, orig, dest, weight = "length") on a graph of a city. I know which nodes I want to ...
4
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1
answer
395
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Deleting more than one node at once in QGIS
I would like to delete some nodes in my layer. I've got them about 50 or even more.
I found some solutions here:
https://www.youtube.com/watch?v=lbgmNXXJCzA&ab_channel=JustinAdler
How can i ...
- 3,791
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1k
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Connecting nodes to existing network lines using QGIS
I have road network (polyline layer) and point layer:
I am trying to connect nodes to the existing network lines. I able to connect nodes with lines using connect nodes to lines in Networks in QGIS ...
- 865
4
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1
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810
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Changing the order of the polygon's nodes using the geometry generator in QGIS
How can I, using the geometry generator, change the order of the polygon's nodes, starting from the most northerly node in QGIS?
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158
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Adding multiple Dom Nodes in Content
I am using a popup on my mapView from arcGIS API for Javascript 4.17. When the user opens the popup, I have set the following attributes:
view.popup.open({
// Set the popup's title to the ...
- 1,935
2
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1
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655
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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 ...
- 865
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328
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Adding nodes automatically without clicking the mouse
Is there a way in QGIS (or maybe in another GIS (ArcMap, for example))) to automatically create nodes at a given interval when digitizing a raster?
For example, I decided to create a Polyline object. ...
- 115
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1
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1k
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PgRouting : Shortest path starting from the closest vertex not the closest node
I am currently working on a routing solution with PgRouting (Dijkstra's algorithm), but the shortest path it creates always start from the nearest nodes generated from the edge table, and sometimes ...
- 113
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132
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Polyline node order
I was looking for a tool/mechanism for determining node order in a polyline shapefile. For this exercise, node order would be the number of polylines attached to each node. A dangling node would be ...
- 71
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25
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Online source of polygon nodes for individual newly created zipcodes
When a new zipcode is created it would be very convenient to obtain its polygon nodes from an online source, without having to download a national dataset. Does an online web-page or web-API exist, ...
- 121
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56
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Generating nodes at joining points
I have road network (lines) and points (Address) . With the help of closestSegmentWithContext function, I join points to nearest lines in QGIS. Is there a way to to generate a nodes at every joining ...
- 865
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172
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Labeling nodes with letters but removing last letter using QGIS
I want to label nodes of my polygon with upper letters. I got to the point where I am able to label them with the right style. What I still need to do is to dismiss the final letter because it ...
- 393
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204
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Linking points and line layers
I have a points layer and a polyline layer.
The points layer is basically bus stops and the line layer is the road network.
The bus stops may or may not fall exactly on the road network layer.
I want ...
2
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1
answer
2k
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Trying to iterate through the nodes of a multipolygon
I've got a multipolygon which I want to iterate through the nodes for. I will be editing the nodes later on, but right now I just want some code which works.
My relevant code is just this bit:
for ...
- 912
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1
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119
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Add nodes automatically to adjacent objects QGIS
I'm currently using QGIS 3.10.2 A Coruna.
I'm translating an analogue map into QGIS and there are different classes of objects within the same Layer (streets, buildings, properties, etc...).
I ...
- 567
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1
answer
53
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Node Table requried - Per node identyfication of what edges intersect here. (This are roads from open street map)
Having around 2000 rows with multiline string coordinates I am implementing code to see where they intersect.
0 MULTILINESTRING ((-2.50909 53.07879, -2.50867 ...
1 MULTILINESTRING ((-2....
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456
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How to delete vertex and keep topology
I work with line vector data (road network).The lines (roads) includes several vertexes. I would like to have for each line only nodes - at the end of line, or at the intersection of n lines. How can ...
- 49
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1k
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Get junctions from pipeline in QGIS
I have pipeline network by shapefile, I want to get junctions and it must have link with pipes to run Epanet (id's junctions must have in node1 and node2 of pipeline). I know that we can extract point ...
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4
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5k
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Generating chainage nodes and labels along line each 10 meters in QGIS
I have a line defined by a start and end node. I’d like to insert a node every 10m spacing and label it with the chainage (distance along the line).
I thought I could insert nodes every 10m then ...
- 637
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370
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Polygon node order will not correct [duplicate]
I've got a few polygons (they were previously one multipolygon) which seem to insist on having an anticlockwise node order. As such, when running through various operations in SQL, they throw out the ...
- 912
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198
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Adding nodes to pipe ends using ArcGIS Desktop?
I have two features, a pipe distribution network, and nodes. I need to have nodes at the end of each pipe. I have already found which pipes have no nodes at their ends.
How can I add nodes to the ...
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115
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How to select and move below vertex - Vertex Tool (QGIS 3.6)
I have a path (tracks) generated by points, which I snapped before to a grid (so there is some vertex at the way back that are overlayed), that at some point overlay each other. When you select in the ...
- 181
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1k
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Deleting vertices from line feature using PyQGIS
I have a line made of 17959 nodes. I want to delete several range of nodes from that line with a Python command.
For example I want to delete all nodes between node 5530 to node 5861 and connect node ...
- 503
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2
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2k
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Bulk Snapping Points to Line Vertex in QGIS?
I have around 8000 point features that require snapping to the nearest line vertex. Please see below image for reference. I would like to do this in one go if possible.
Is there a tool in QGIS 3 ...
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4
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4k
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Moving node in QGIS?
I am trying to move a vertex in QGIS 3.2. I can select nodes in QGIS 3.2 (which show up blue), but every time I try to move it with the node tool it just deselects the vertex.
How do I move a node ...
- 650
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211
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Find the NW vertex of a polygon
I am using QGIS 2.18 and I am wondering how to find the NW corner of a polygon and create an attribute of that point number. See the attached image.
For example, please node 8 is the NW corner for ...
- 389
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194
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How can I merge overlapping nodes of a polygon in QGIS? [duplicate]
My shape is composed of 7 polygons which are supposed to be adjacent (ie sharing sharing same nodes). Would like to join the polygons by their nodes and make sure there is no space in between two ...
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5
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2
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3k
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Vertex editor panel
I want to connect two lines in QGIS 3. In QGIS 2.18.16 I fixed it when I edited coordinate values of vertexes instead of manually (with mouse) moving them across the map because I want to match lines ...
- 173
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245
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Issue editing nodes on a PostGIS table via QGIS
I launch a PostGIS table via QGIS DB Manager tool [PostgreSQL 9.4.17 - PostGIS 2.1.8 - QGIS 2.18.19]. The table geometry is MultiPolygon. I can toggle both Toggle editing and Node tool buttons. When I ...
- 2,720
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805
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All nodes are duplicate in polygonize result
I have a strange error with a large complex polygon shapefile (representing a hypothetical historic flood level of a lake) that I cannot resolve. Using QGIS 2.18.14, the polygon was derived as ...
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318
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QGIS Python Program for extracting all the Polygon nodes - Issue with Geometry MULTIPOLYGON
I have a python program which can extract all the nodes of any polygon to a text file.
import ogr, os, sys
import xlrd
control_file = "W:/04 Tools/07 MapMaker/Control File_Shapefile to Text file.xls"...
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351
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Getting closest node point (within 2km) from current location using pgrouting?
I'm very new to the GIS, and grasping the pgrouting function to see the possibles develop this feature.
Basically I wanted to know all the next end points distance within 2KM from the current ...
- 103
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276
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Vectorizing missing nodes in QGIS?
I am trying to vectorize a raster with tree coverage information. I classified the data in 3 categories and now I am vectorizing the raster to make calculations and intersecting it with other layers.
...
- 123
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442
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Move node feature and snap to node of other layer
This seems like I'm missing something obvious - I have a layer with node features that I need to update the position of by referencing another node layer. Should be a simple move and snap-to ...
- 1,025
9
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2
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1k
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commuteDistance in gdistance package in R giving error
I am currently trying to run a function that "calculates the expected random-walk commute time between nodes in a graph. It is defined as the effective distance (resistance distance) between the ...
- 1,342
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3
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3k
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Extract coordinates of lower right corners of polygon
Using QGIS 2.18.14, I would like to know the node number at lower-right corner of each polygon, shown as red circle in a image below.
My goal is to obtain xy coordinates, by giving such number n to ...
- 31.2k
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83
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Contour Plugin generated contours do not have enough nodes
I am using the contour plugin to generate intermediate contours. I have a vector file with 5 foot contours and want to interpolate 1 foot contours from it. The procedure I used was:
Extract nodes ...
- 21
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1
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158
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How to extract nodes at regular interval using QGIS? [closed]
How can I extract nodes at a regular interval say 20 m from a path kml file having point located at random interval.
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