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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199 views

r - intersection of 3D objects

How can an intersection of 3D object with 3D object be done in R, for example a 3D line with 3D polygon ? Saw that "sf" provides some possibilities but didn't get the desired result. What was ...
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61 views

Analyzing single Polygon or Polyline that overlaps itself using ArcObjects?

My current process is to determine obstructions in an area and determine properties of those obstructions as they relate to a centre polyline. Per the image below I take a polyline which denotes a ...
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1answer
64 views

Finding line style for ArcMap?

I am running ArcMap 10.6 and I need a line that I thought would be included in the standard styles. It is the line symbol used when a polygon feature crosses a line feature and you want to show that ...
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1answer
94 views

Creating 3D polyline just below another polyline using ArcGIS Desktop?

I have a geological setting where I would like to add a lithology to an existing map. I already have the 3D polylines from my geological map and the DEM I now want to add another polyline between two ...
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1answer
256 views

Geoserver SLD styling to align labels at the center vertical of roads

I've used SLD to style road features in Geoserver. As roads include multiple segments the 'group' attribute has been used to control label repeat of roads. The problem is some labels can't be placed ...
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1answer
111 views

Splitting line in proportional parts in QGIS

I have recorded flight paths of birds as lines. Now I want to transform the lines to points, which represent the bird's position in a minute interval. For this, I want to divide the lines by the time ...
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2answers
256 views

Finding which side of closest polyline point lies on in QGIS?

I would like to find on which side of the line (left or right) my points are located with respect to the direction of the line (like knowing the rivers bank along a meandering river). But, if there ...
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2answers
287 views

Line/Polygon intersection with a tolerance in QGIS

I have a layer with Polygon and a layer with Polylines. I am looking for the list of Polygons crossed by the Polylines. Just here it's relatively simple: intersection function. That said, the ...
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1answer
123 views

Parallel lines inside of polygon

I have an irregular polygon. I want to make parallel lines with 14 meters of space between the inside of the polygon using QGIS, does not matter the direction, but it is necessary to have the least ...
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0answers
39 views

Conversion of Text layers to vector 'Line' Feature Class

Is there a way to convert Text or Labels to Vectors within Geomedia or utilize the Publish to KML and convert using Google Earth? I do not have Adobe Illustrator installed here to 'Create Outlines', ...
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1answer
67 views

QGIS: Loading a CSV of points as a line

I have a CSV file downloaded from a GPS tracking system. Every row contains lat, lon, timestamp, and row no. How can I load it into QGIS as a line layer?
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241 views

Extend line to specific point

I have a line layer which is cut at the level of the point layer, I want it to be connected at the nearest point while saving the forme ( just adding the missing part the that line without moving it)...
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2answers
79 views

Generalizing round segments

I have a polyline feature class and I need some segments to be generalized. I tried exactly Generalize tool in Advanced Editor toolbar as well as Simplify Line tool, but it isn't what I need. My ...
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2answers
141 views

Combining two shapefiles which contain overlapping and duplicate geometry

Well this could be an interesting one. I've got two shapefiles of polylines (contours). I need them to be one nice and clean shapefile covering the same area. Only issue is, the shapefiles overlap ...
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93 views

Line Model with Z-dimension [duplicate]

I made a contour model of a specific area and named it by its height. I need this Data to import into AutoCAD, so I saved it as .dfx with Information about its Z-dimension, by choosing "include z-...
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2answers
75 views

Calculating width of polygon relative to polyline using ArcGIS Desktop?

I need to estimate the different widths of the polygons that surround some polylines. The polygons correspond to wetlands (buffer zones) and the lines represent the rivers. The catchment that I´m ...
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1answer
114 views

Return A Path from multiple point in Geomesa

I am trying to visualise the historic of a vehicle in a specific area , I am writing now a query to get all points off a this vehicle in this area with this : FeatureStore feature = (...
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1k views

Adding polylines to leaflet map in R

I am trying to add great circle routes between various regions in R. Here's the sample data: structure(list(CommencingRegion = c("RedSea", "EastAfrica", "GulfofMexico", "FarEast", "RedSea", "...
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1answer
655 views

Connect points in two layers using lines in QGIS 3.x

I'm using QGIS 3.2.1 and I have two Layers containing point objects, Is there any plugin for this version of qgis that I can use to select two points and then connect them using a line and save the ...
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1answer
47 views

Calculating partial distances from whole segment in grid using QGIS?

I am using QGIS and trying to find a way to calculate partial distances of lines in a grid. In the left part of the picture you can see the sum of the line lengths within the grid cell (108.96...), ...
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1answer
894 views

Access vertices of a line in Python

Given a shapely.geometry.linestring: How do you access single vertices using Python?
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1answer
528 views

Create polyline layer from csv-file (id, lat, long, time) in QGIS

Some units are moving and regularly registering it location. Each of these register events corresponds to row in a csv-file. This row contains fields: id (unit identifier), lat, long (event location)...
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1answer
276 views

Python: Open a (line) Shapefile and calculate distance to point given as a longitude-latitude tuple

I have a pandas dataframe in python with longitude and latitude values of certain locations (see sample below): Index Long Lat 0 -98.58 ...
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1answer
46 views

Removing lines on coast side using ArcGIS Desktop?

I have a shapefile of European countries (with regional subdivisions) as well as a shapefile of lines. How do I delete all the lines on the coast-side, using ArcGIS Desktop?
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1answer
114 views

Fixing bad topology on polylines with QGIS

I've been sent a shapefile containing 12 layers of some city's road system. Each layer depicts a portion of the road system, and all of them partially overlap on the map. I'd like to work on the sum ...
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1answer
250 views

geom_line() does not plot points from a shapefile in its correct order

I have been trying to load and plot a few shapefile in R using ggplot() and am facing an issue with a line vector shapefile. It seems that the readOGR() command is importing the line vectors ordering ...
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1answer
507 views

Display overlapping polyline segments as multiple lines with offsets?

Selecting which polyline is displayed on top in case of segment overlaps seems to be quite a FAQ, however, I would like to find a way to display overlapping polyline segments side-by-side, i.e. as ...
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0answers
125 views

Finding layout of points on road?

The problem I'm trying to solve is finding layout of street lights on a street. The street lights can be arranged in the following layout: one-side, two-side opposite, staggered, or median, etc. as ...
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1answer
848 views

JTS: generate a polygon geometry from line geomtry

I have a line and I wish to convert it to a polygon. The point is this line is NOT a ring it's an straight Line. And I want to use an specific width to extend line horizontally and create a polygon. ...
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1answer
4k views

Is it possible to convert Polygon to centerline linestring?

I have a Polygon which I want to convert to centerline linestring. IMAGE 1 I used the Vector to convert to Polyline but they are not center line as under: VECTOR TOOL IMAGE 2 Polyline created by ...
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2answers
207 views

Transforming a polygon to a linestring

Is it possible to (trivially, via a tool in python) to convert a polygon to a linestring? if so, how? If not, why?
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1answer
31 views

Get attributes from one line feature to another

I have to use two different networks (e.g., Network A and Network B) to do analysis and they don't align with each other perfectly. I used the same points to split the lines in the two networks, so ...
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0answers
30 views

Line feature won't stay in place

I'm working on a storm network system and have an issue with a drain line. When I try to snap it to a point, it moves slightly to the right every time. I've checked that there isn't topography for ...
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1answer
224 views

Find coordinates of extended line segment intersects with given longitude

I have a line between C1 and C2; My Coordinates are; C1: 36.454N - 21.785E C2: 41.725N - 38.475E I want to find C3 latitude value based on given longitude when I extend my C1-C2 line segment. IE ...
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0answers
16 views

Points on the opposing side of a breakline

If you have a breakline or even a single line segment within a DEM, how can you tell if two points lie on the opposing side of that breakline or line segment? From a computational geometry standpoint ...
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2answers
45 views

Calculating percentage (or length) of stream network that is multiple channel streams using ArcGIS Desktop?

I have a polyline stream network of all channels within a drainage basin (which is 1.1 million square km) A number of the rivers in the basin alternate between single thread and multichannel (i.e. ...
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1answer
85 views

Auto snap of point features with lines

I want to snap my point feature with Line features. So That I can perform join attribute by location to read attributed from points into lines. Is there any way I can do this task automated. Once ...
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1answer
115 views

Draw polylines given distance & azimuth

I am trying to draw a polyline from a single reference point. I have each specific segment of the lines Azimuth & distance. In the sequence I have areas where my line shifts over +90 / -90 of the ...
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1answer
783 views

Calculate sum of line lengths in R

I have object1 with polygons and object2 with lines. I am looking for a way in R (preferably with the package sf) to calculate the sum of line lengths from object2 for each polygon in object1. The ...
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2answers
746 views

Creating flat end buffer using geometry generator in QGIS?

I'm new to GIS software and I've been introduced to QGIS 2.18 as part of my internship. I was tasked with creating new styles for the company's maps, however I've encountered a problem with one of ...
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2answers
530 views

Using points2one?

I downloaded the points2one plugin and tried many times to connect points to a line, but it never works. Is there something that I set wrong? I tried the answer,but it has been running 10 mins, and ...
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1answer
791 views

Calculating length of polygon in ArcGIS Desktop?

I am using ArcGIS 10.2.1 Desktop with an Advanced license. My company has electric lines that go through people's yards. The areas around these lines require trimming occasionally, which necessitates ...
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2answers
407 views

Save points and lines within the same shapefile

Is it possible to save points and multiline strings within the same shapefile? If so, how?
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1answer
460 views

Single sided buffers gives not only buffer on one side

I have tried to use single sided buffers to make buffer on one side of of a line. But the buffer is sometimes changing sides as shown below: Must mention that the line is straight: What is the ...
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5answers
2k views

Find nearest point along polyline using 'sf' package in R

This is a follow-up question related to my earlier post about using the sf package to split polylines using nearby points. I have 450 points with XY coordinates and a large river network (~214,000 ...
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1answer
380 views

Labeling polygons along their boundaries using QGIS?

When labeling polygons (not polylines!) in QGIS, is it possible to label them along their borders rather than their area? I know I could convert polygons to polylines and then label them, but I am ...
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1answer
36 views

Only output points near borders, excluding points near coast

I would have liked to ask for help, being confronted to a problem with ArcGis. I have in fact a shapefile of countries and a bunch of points. I would have liked to keep only the points that are ...
2
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1answer
667 views

Repairing all topology errors at once in ArcMap?

In 2012 an ArcMap user wrote Automatically fixing multiple errors using Fix topology error tool?: I am a ArcGIS.10. user. I'm want to solve multiple errors using the fix topology error. So I ...
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2answers
131 views

Select a specific line length after and before a point

As you can see from the attached image, I have a shapefile of river network (line) and a point shapefile (this one represents the middle point of transects carried out in the area). I'm trying to ...
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2answers
366 views

QGIS Distance Matrix - with line geometry output?

I have a series of Output Area centroids and I want to create a matrix of lines between each point (every point connected to every point), which is effectively what the distance matrix tool does (I ...