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Questions tagged [nodes]

The tag has no usage guidance.

2
votes
1answer
52 views

Delete vertices from a line 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 ...
1
vote
1answer
28 views

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 8....
3
votes
1answer
101 views

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 ...
0
votes
0answers
59 views

osmnx using new clean intersection nodes as graph nodes

I want to create a new graph from clean nodes and edges. From that, OSMnx Example #14 Clean Intersection Cluster Nodes, I am able to get the street network and do the processes like shown in the ...
0
votes
0answers
40 views

OSRM nearest service - output explained

I am trying to understand the output of the nearest service in the OSRM API. For example, for the following query: http://{server}/nearest/v1/driving/-0.34864629999999996,39.4611833?number=3 The ...
2
votes
1answer
65 views

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 ...
1
vote
0answers
31 views

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 ...
4
votes
2answers
678 views

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 ...
0
votes
0answers
57 views

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 ...
3
votes
3answers
100 views

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 ...
1
vote
0answers
79 views

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"...
0
votes
2answers
64 views

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 ...
1
vote
1answer
83 views

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. ...
0
votes
0answers
49 views

Nodes does not appear where they should be while creating network in ArcGIS

My project is making demand model in VISUM (Trasportation software like TransCAD). I have a shapefile of a network. When I import it to VISUM, the software creates node points automatically but not on ...
1
vote
0answers
231 views

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 ...
4
votes
1answer
354 views

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 ...
3
votes
3answers
385 views

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 ...
2
votes
0answers
62 views

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 ...
0
votes
1answer
99 views

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.
2
votes
1answer
44 views

network analysis that includes user defined nodes

I want to make network analysis using python. I want that user must be able to select point of interests and calculated route must contain that points. For example between start and end nodes user, ...
2
votes
1answer
62 views

When trying to find the nearest line to a point, how useful are nodes?

I am working with a dataset (OS Open Roads) which consists of lines and nodes in separate shapefiles. The lines represent the roads themselves. The nodes represent, for example, the end of a road, ...
1
vote
1answer
49 views

Split polygon multiple line nodes

I have a landmask derived from Landsat, transformed into polygons. Due to the raster origin, there are a lot of 4 line nodes (see picture), creating "holes" of unmasked area within the polygons. ...
1
vote
1answer
230 views

Extract OSM nodes: all surface parking spots in germany

I would like to extract all surface parking spots in germany as nodes from osm. Gladly I have found overpass-turbo.eu, but unfortunately it is not working for my purpose... Either the server is too ...
1
vote
1answer
394 views

Is there a way to extract nodes that connect roads in OSM data?

Is there a way to extract only the nodes that connect links in OSM data? I am trying to locate US Interstate exit and entrance ramp ends in order to compare with my data. I've been able to extract ...
1
vote
0answers
75 views

Compute the distance of some nodes using a road layer which are not exactly on the road

I have the road network of a region (downloaded from open street map as a layer) and a set of nodes (selected using google earth, saved as a KML file and finally converted as a layer). I need to ...
1
vote
0answers
50 views

How to add rings that intersect with a polygons edge in QGIS [closed]

I need to amend the area of an existing polygon so that I can draw another polygon (of another typology in the amended area). Normally, I would manually move the nodes but this will be very time ...
3
votes
1answer
308 views

Getting a list of all neighbors within a specific distance for every node in QGIS?

I have a small task I would like solve in QGIS. I have a single layer with ~ 30000 nodes. How can I create a list for every node in this layer which names all of its neighbors within a specific ...
1
vote
1answer
293 views

pgRouting: Nodes vs. Source/Target

I am working within a local city government on creating a routing network and started last week with little to no knowledge of pgRouting. I want the routing network to be used by our fire department ...
4
votes
2answers
978 views

Snapping multiple nodes of a polygon to the nodes of a line?

I am working with vector polygons that have derived from hand drawn areas from when mapping was carried out with tracing paper over paper maps. Therefore many of the polygons don't exactly line up to ...
1
vote
0answers
30 views

How to move node position keeping right angles?

I made a polygon with perpendicular segments using CAD Tools. I saw that, even if the segments of this polygon are perpendicular, the four points has different values in terms of x, y. I think that`s ...
0
votes
1answer
549 views

How to create a polyline in MapInfo Pro by using the snap to nodes function

I want to create a polyline in MapInfo Pro by using the snap to nodes function, which I can do. But what I am interested to know is that when a node is added to the polyline, could any of the ...
1
vote
0answers
150 views

Missing 'Z' component from points extracted from polyline in QGIS

I have polylines which were created with XYZ coordinates and after extracting the points (nodes) I want to export these to a .csv file with their XYZ coordinates. When I try the 'save as' function and ...
0
votes
1answer
40 views

Exporting Nodes and Attributes with new CRS

I am new to QGIS and having trouble exporting. I loaded a shapefile (.shp, .shx, .prj, .dbf) and displayed it on QGIS, which worked fine. The latitude and longitude were not correct, so I chose the ....
2
votes
1answer
42 views

How to split a network of polylines and then extract vertices without having overlapping lines?

I tried to split polylines with GRASS or QGIS tools but I obtain always a layer with overlapping lines. I figured it out because I always make a spatial join between the splitted lines and the nodes ...
-3
votes
1answer
315 views

Calculating distance for each point along line in ArcGIS Desktop? [duplicate]

I have a polyline(Roads network) and points(Nodes) recorded along the line. I would like to calculate the distance for each point along the line in ArcGIS 10.1. Result will added in a new column and ...
0
votes
1answer
38 views

Split a network according to a vector of nodes

I would like to split a network of roads at the vertices just created in another layer. So, I have got a roads layer and a nodes layer and I would like to exploit the nodes layer in order to obtain a ...
1
vote
1answer
68 views

Adjusting Points While Maintaining Line Network Node Connections

Currently I am working, within ArcGIS 10.4, on a pipe network for our water and sewer infrastructure which also contains all valves, hydrants, manholes, etc. These points are snapped to the line ...
1
vote
0answers
67 views

Saving X, Y coordinates of nodes

I have to manage a network, made by essentially the streets of a city which has to serve some buildings. I used GRASS v.clean to clean the network and then v.net.nodes to make nodes and then I save ...
1
vote
0answers
62 views

QGis Essen Node editing slow [closed]

We have just set up QGis 2.14 (Essen) in our Corporate Environment. It is working well, except that editing nodes seems to be extremely slow and in some cases, unusable. This is when editing SQL ...
3
votes
2answers
91 views

Exporting grid line nodes with ELEV attributes as data frame? [closed]

I would like to have a data frame of nrow x ncol where nrow = rows of my grid lines and ncol = col of my grid lines. The purpose is to use the ELEV data for 3D topography modeling in R. This is what ...
4
votes
2answers
4k views

Using 'Split Features' tool to split a polyline at a specific node with QGIS

In the example shown in the picture below I would like to split the light blue polyline into two polylines on a specific node (circled with number 1) with QGIS (version 2.12.3-Lyon). Given that the ...
4
votes
2answers
2k views

Adding nodes to vertices on lines automatically using QGIS?

I'm currently using QGIS 2.17 to process map data and for drawing roads. I'm trying to add nodes whenever a road breaks, turns or starts/ends. I've tried using the plugin "Locate points among lines" ...
2
votes
1answer
166 views

QGIS 2.16 Extract Nodes command works strange

On Qgis 2.16 when I am using the extract nodes command, even when I save to file with a specific name, the result is a layer named "Nodes" with the extracted points. I have to go to the folder where I ...
1
vote
0answers
11 views

Moving nodes of different multipolygon on different layers

I would like to import into Openstreetmap the land-use data. In order to do a good job, I would like to correct some imperfections before the import. Take a look at this screenshot (which is a small ...
1
vote
1answer
478 views

OGR error creating geometry for feature when deleting nodes

I have a line Shapefile that I need to remove many nodes from. Some I can delete fine, others delete but when I hit save I receive the following error: OGR error creating geometry for feature Using ...
5
votes
1answer
604 views

Create an optimised path between nodes avoiding polygons entities

I have a point shapefile representing seaports. I have the linear cost of shipping for every seaport pairing (specific shipping cost to go from one point to another point). I want to find a way of ...
28
votes
4answers
13k views

Difference between node and vertex in GIS?

In graph theory the term of node and vertex are equivalent, but sometimes in the GIS world the nodes and vertex are mentioned in the same context. I was wondering what the difference is? Node: can ...