Questions tagged [line]

A set of ordered co-ordinates that represent the shape of geographic features too narrow to be displayed as an area at the given scale (contours, street centrelines, or streams), or linear features with no area (county boundary lines)

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labeling line on qwc2 - bad position

We use QWC2 to show lines of our energy-network. The lines are labeling with the name of the line (e.g. M30001 or M10001 like the screenshot). Unfortunately, the label is every time at the frame of ...
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Creating new polygons from intersecting polygon and polylines in QGIS

I want to create new polygons from the intersecting polygon and polylines shown in the images below. At the output, I need to get four polygons representing the polygons shown in the top image after ...
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Extract Elevation data from DEM and add Z-Values to Polyline file

Is there an efficient way to add elevation data from a DEM Raster to a polyline shapefile? I am attempting to add elevation data to a city roads shapefile to map out flash flooding issues. The streets ...
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QGIS autoadjust the line to another existing line nearby

I have the line created by the "Point to path" function. The algorithm produces just a straight line, whereas I would like to have this line auto-adjusted to the other line (or buffer) which ...
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Clip Line Layer to Polygon but retain the Lines outside the polygons

I want to clip a line layer to a polygon layer, but retain the lines outside the polygons. Can anybody assist me in doing this please? On the image included, the lines are in red and the polygon in ...
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"One or more line ignored due to geometry not having a minimum of three vertices" error when "Line to Polygon" in QGIS

Converting "Line to Polygons" using geometry tools in Vector could not be executed results shows this picture How to solve this issues?
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Measuring length of polyline which overlaps polygon in ArcGIS Online

I want to measure the length of a polyline which is not completely within a selected polygon. I want only the length of the polyline which overlaps the polygon.
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How to get a list of lines, with a list of polygons that they intersect? [closed]

I am a new user in a PostGIS environment and don't even know where to start. I have two tables, one storing lines and the other storing polygons. I to create a query that can be used to get a separate ...
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2 votes
1 answer
59 views

Clip a line that overlaps two polygons in QGIS

Is there a way to clip a line that overlaps two polygons in QGIS? The line needs to be resized to either the poly/line intersection on the inside of the polygons or the poly/line intersection on the ...
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1 vote
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47 views

Leaflet - add line for border

I pretty new in Leaflet and I have a polygon like L.polygon(poly, { title: 'test', colorfillColor: '#F16E60', fillOpacity: 0.5, weight: 20, color: '#F16E60', opacity: 0.5, fill: true}); poly = [ [...
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Making line thickness based on the sum of overlapping lines in QGIS [duplicate]

In QGIS 3.22.2 I have used the ORS distribution calculation tool to work out the number of vehicles that go from one origin to multiple destinations. I am trying to represent this number as a line ...
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Polyline endpoint query layer in ArcGIS Pro

I have an Oracle 18c/SDE.ST_GEOMETRY polyline FC (15,000 features). I want to create a query layer (or db view) that will display the startpoints and endpoints of the lines in ArcGIS Pro. Is there a ...
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Leaflet Polygon increase border transparent area

I pretty new in Leaflet and I'm trying to increase the border transparent area for a polygon. The red darker border needs to remain the same weight but the area that I've marked with green should be ...
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Leaflet multiOptionsPolyline - draws color on the next segment instead of the right one

It's my first time using multiOptionsPolyline to draw a multicolor polyline from an array of LatLng points, with red segments if distance is smaller or equal to 90m and green if bigger. var polyLine = ...
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4 votes
2 answers
209 views

Drawing lines that overlap inside the perimeter using QGIS

I want to make a map, with two plots. I want to draw them only with a line along the perimeter of each one, with different colour. My problem is that when the lines overlap, only one colour is showed. ...
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Using Mapbox 'flyto' function to a polyline

I wonder whether the Mapbox GL JS 'flyto' function can be used to 'fly to' a polyline, for example a certain stretch of road/highway? If so, what is the code to do this?
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Generating Points Along Lines not starting at the start of my line feature

I am trying to generate chainage points in 50m intervals on a road system including the start and end of the line. Each road is its own single continuous line and while attempting to solve my issue, I ...
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3 votes
1 answer
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Splitting line-layer with point-layer in QGIS

I have a separate layer with polylines that are merged into one object. I want to split it by a separate layers with points in QGIS. I have tried using the SAGA tool "Split Lines at Point" ...
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Dissolve features based on attribute and a distance

I have a streets layers where the lines don't align. There are multiple features/rows for the same street and the lines are not connected (see picture for how they look). I want to connect these lines ...
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Points in lines extraction of coordinates automate

I'm currently working on a project with ArcMap. I'm having a problem on how to extract the x,y info of all the points in a line, meter by meter. This is the problem & objective: So I have 1 line, ...
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3 votes
1 answer
77 views

Appropriating ID for all lines inside polygon in QGIS

I have 12 Polygons with a lot of lines in every Polygon. The Polygon have each its own "ID". I would like to add the "ID" of the polygon to the lines it is containing.
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Add line shapefile to 3D raster plot in rasterVis

I have generated a 3D raster plot using the plot3D function in the rasterVis package in R. For enhanced data visualisation, I want to add a line shapefile, representing a sampling transect, to the 3D ...
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1 answer
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Create point feature at line intersection and split lines - R [closed]

I have a shapefile that shows all the roads in Germany. Hereby, I want to create a point at each intersection of lines. Based on this created point, I can split the line into separate line features. ...
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4 votes
1 answer
67 views

Rotating point layer according to line layer in QGIS

I got two layers: (1) a line layer with water pipelines and (2) a point layer that shows hydrants and so forth. The points are located, mostly, on the line layer. For the symbology of the hydrants i ...
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Using ArcGIS Pro tools to determine front of polygons in relation to street lines

I am looking for help to develop a process to identify the sides and lengths of parcel polygons in relation to streets to determine the 'front' of the polygon, i.e. facing the street, so I can then ...
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7 votes
4 answers
197 views

Generating dangle point for polyline in QGIS

How do I generate the dangle points (into shapefile or something) (blue dots in picture below) of any polyline in QGIS? These are not start/end vertices.
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1 vote
1 answer
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How to export DXF lines and polylines into one shapefile in QGIS

I imported a DXF file into QGIS and now after editing it, I wish to save different parts of it as a shapefile. When I go to save the layers by highlighting the ones I want and pressing right click >...
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0 answers
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Calculating shortest distance between points within polygon using QGIS Continued - by group and ordered by longitude

I am trying to use something similar to the least cost paths in SAGA in order to draw a line through various points, grouped by unique ID levels, and ordered by longitude, and restrict it to a raster. ...
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1 vote
1 answer
18 views

How to calculate Beginning and End Intersections of Polylines?

I have ArcMap 10.8.2 and am working with road networks consisting of intersecting polylines. Each segment has its own ID and I would like to calculate its position relative to other segments. The ...
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1 vote
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31 views

Capturing accurate polygons from field data

Drawing out a new polygon with snapping enabled to closely follow the vertices of the track line that I have seems to work, but I get the impression that the track itself has far more information that ...
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3 votes
1 answer
93 views

Visualizing a polyline with decreasing width towards one end (QGIS)

I am acquiring data related to the hydrography of a territory. I would like to use a symbology that allows me to have a line whose thickness decreases as it reaches its end (like the example in the ...
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5 votes
2 answers
162 views

Matching colour of point to colour of polygon based on shared attribute using QGIS

I am setting a query on the symbology in QGIS. I have a layer of point locations (586 points which show the location that data has been collected) and I have a layer of polygon areas (576 polygons the ...
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5 votes
1 answer
106 views

Measuring distance between wavey lines/points in QGIS

In I want to design meandering lines on a plot at 5m distance apart. I am using the circular string tool so it's all by hand, ideally, they would be identical lines with a consistent 5m distance. How ...
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1 vote
1 answer
29 views

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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4 votes
1 answer
76 views

Grouping lines by name and determining their proportions using Virtual Layer

I have a line layer with hiking trails. The hiking trails are divided into their surfaces. So one hiking trail consist of parts with different surfaces. I would like to use a virtual layer to group ...
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4 votes
1 answer
62 views

Clipping polygon based on a line to get a polygon in R

I would like to clip a polygon on the right-hand side of a line i.e. the portion of the polygon to the east of the line such that the result is a polygon. I have tried functions such as sf::...
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0 votes
1 answer
39 views

Merging lines (create one line from multiple lines) using ArcGIS Pro

I have polyline shapefiles with hundreds of line segments - streets, paths, highways. The rules are that a line can be divided only on intersections or when the attributes change. But all of the lines ...
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2 votes
2 answers
91 views

Manually assigning points to line

I am fairly new to QGIS. I have about 100 georeferenced counting stations for Munich and a street network given. However, both are from different sources and the counting stations need to be assigned ...
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0 answers
27 views

Generating transects to the extent of a polygon

I am trying to clip pavement polygons in Arc Pro (but will use postgis or other software), and I'm using transects to do this. My method is: Generate the centreline of the polygon Use the Generate ...
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2 votes
1 answer
123 views

Turf.js lineIntersect() not giving intersection of lineString and feature?

I'm displaying some polygons in Leaflet, and using Turf JS to do some calculating. After drawing a line between the centroids of two neighboring polygons, I want to find the intersection of the line ...
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0 votes
1 answer
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Making space between line features on different scales using ArcGIS Pro

I have a feature class layer where linear features will often be digitised close to each other. These lines are all features in the same layer. Example when zoomed in: Problem when zooming out to ...
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0 votes
0 answers
30 views

Polyline featureclass as water network [duplicate]

I use ArcGIS Pro. I have a polyline featureclass of a water network. I want to create polygon layer around these lines to became a coverage layer but I want that to be automated and not manual. Can ...
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0 answers
12 views

Extracting the channel banks' shapefile segments

I want to extract separate lines for left banks and right banks of a large channel network, and doing it manually sounds too tedious. Is there an efficient way to extract the polyline or vertices of ...
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0 votes
2 answers
25 views

coverage layer as water network [closed]

I have polyline featureclass as water network. I want to create polygon layer around these line to became coverage layer but I want that to be automated and isn't manual.
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1 vote
1 answer
76 views

Converting array to polyline using Arcade with ArcGIS Pro

Arcade/ArcGIS Pro 2.9: I have an array of polyline vertices: [[[670634.3148,4862051.3579,null],[670719.3321,4862051.0072,null],[670721.44381227,4862055.2956567,null], [670724.26721751,4862059.1529319,...
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6 votes
1 answer
79 views

Visualizing effectively transport transit lines in QGIS

I have a shapefile that contain bus lines. You can see a screenshot below: I would like to visualize the lines in a more understandable way since there are a lot of overlapping sections. I have tried ...
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4 votes
1 answer
96 views

Remove unwanted vertices from a straight line

I have a MultiLine String that is straight but when I highlight vertices, I notice that it has 10 vertices - some vertices also overlap. When I covert this multipart line to singlepart, the line still ...
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0 answers
26 views

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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2 votes
2 answers
118 views

Intersection of lines passing from two line segments in PostGIS

I am trying to find the intersection point of two lines of which I know 2 points. For example, I have these 2 line segments: select st_geometryfromtext('LINESTRING (4.50554487780521 51.922119943633575,...
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  • 277
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0 answers
22 views

Snapping lines to the same point when more than 2 lines are intersecting

In case vertices are close enough (i.e. 7m) I want to snap lines to a single point when there are more than two lines intersecting. Is there an easy way of doing this for all the similar intersections ...
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