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Questions tagged [parallel-lines]

In geometry, parallel lines are lines in a plane which do not meet; that is, two lines in a plane that do not intersect or touch at any point are said to be parallel.

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Maximum Length parallel line

I have a polygon and I want to make parallel lines inside of the polygon. I need to have the maximum length when I sum the length of all of them. Each line must be 15 m apart.
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QGIS - Parallel Lines - Count length of one

I have a large layer of lines (telecommunication duct) with in parts several parallel lines that are close to each other (cause they lay in the same trench). I would like to count the length of the ...
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Drawing parallel lines in QGIS 2.18?

Is there a button in QGIS that will allow me to create parallel lines? I do not mean by using a script, or distance from. I usually use ArcMap, and in ArcMap you just begin editing, select parallel ...
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166 views

Distance between multiple parallel lines?

I have a set of parallel lines where the default distance between them is 1.4m, I need to identify where that distance is greater or less than the default: I have a sample file where it was done but ...
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Displaying parallel line information [duplicate]

I would like to display information of a line feature in parallel. For example, a river line feature with its different qualities. I want to avoid a parallel copy of line features. Is it possible to ...
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How to visualize values distributed on the line on its parallel (curves problem)

I assign some value for each of points distributed equally on origin line, then I want to move this values to its paralllel line, by splitting those parallel line into equal pieces (which amount will ...
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1answer
458 views

Automatic bus route map without overlaps

I'm working with drawing maps of all bus routes in a defined area (municipality) in QGIS. I have a problem about showing two routes with the geometry (the same road) parallel. I know it's possible to ...
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1answer
804 views

Bearing of Two close lines in python

In the picture below I am finding the bearing of two close lines. This is the picture of two complete lines. The brown line might be a bit large from the blue line. Should not be the bearing of these ...
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1answer
82 views

Finding crossing point between geodesic line and parallel?

Given a geodesic line (starting point and initial azimuth) is there an algorithm to find the longitude of the [first] crossing of a given parallel? I have already checked with Clairaut's constant ...
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904 views

ArcPy Solution for Copy Parallel

This question has been marked as a duplicate multiple times now. Please read the entire question before flagging it as a duplicate. The previous "duplicates" for questions about copy parallel do not ...
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1answer
68 views

QGIS CadTools: changing parallel line fixed length from degrees to meters

I'm new to QGIS and want to create a parallel line. I'm using the CadTools plugin to do so. When I add a parallel line, the fixed length is in degrees not meters. How do I change this so that the ...
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243 views

Want to create a parallel line with my curve line

I have a curve. I want to make a new curve which is parallel with the original curve. I want to take them away from the original place 5 meter away while keeping its orientation.
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656 views

How to select parallel lines in postgis

I have roads(MultiLineString)table in postgresql database. The roads are classified based on priority attribute i.e. priority = 6 for motorway priority = 5 for highway priority = 4 for ...
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What techniques exist for clustering road routes?

The typical clustering (by proximity) techniques that I've seen - hotspots or marker counts - relate to single point data. Different challenges exist for deciding the significance of proximity in ...
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53 views

QGIS demarcation and parallel line [duplicate]

I have a shapefile which contains a 20 hectare polygon. I want to demarcate 9,48 hectares from the entire polygon with a parallel. I can make the parallel line with the longer line but I can not do ...
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Is there any option in QGIS to draw parallel lines that snap on the outside part of the line (adjacent lines) that are independent from scale?

I have to draw a map of a public bus transport network and i have a problem in the avenues where a lot of lines passes by. My objective is to make a visual map where the lines in those avenues are ...
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483 views

Extending line segment to polygon edge using ArcGIS for Desktop?

I am trying to extend line segments to the related parcel. There is not an address field in the line segment but there is a year field. The year field is what needs to be added to the parcel to ...
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1answer
728 views

Selecting parallel line segments but not segments that intersect

I have 2 different shapefiles that each have railroad track on them. Most of the track being displayed is the same, but since it is coming from 2 different sources, the physical lines themselves are ...
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1answer
265 views

saving results of ST_offsetcurve to new table with geometry and fields from original data table

I am trying to create lines parallel to some road centerlines, using distances from the attribute table specific to each line. I'm trying to figure out how to get it to save to a new table with ...
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grass r.watershed to larger rivers parallel lines to same stretch

I'm trying create stream channels with r.watershed grass64. However, it shows two or three parallel lines for the same stretch of river. The river is large in some parts, but is just one river. Does ...
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1answer
109 views

Find lines that have specific distance between them in QGIS

I have a rather large dataset that contains duplicated lines with an offset of 1m-5m and I want to find an efficient way to solve this problem using QGIS. Is there anyway in QGIS to find the lines ...
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1answer
1k views

Copy Parallel editor tool - python script / modelbuilder [duplicate]

Is it possible to use Copy Parallel tool in a python script or in modelbuilder for ArcGIS 10.2? Does anyone have a workaround or script for a tool that essential does the same thing as Copy Parallel. ...
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291 views

Selecting only parallel lines along a center line [closed]

Read through the previous post how to find close and parallel lines but still looking for a simpler solution. Found several ArcGIS forums post on the topic but no answers there either. It seems ...
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how to find close and parallel lines

I need help with script for QA of water network. I need to find all lines that are almost parallel and close to each other less then 2 meters. The script have 3 stages: add azimuth field and ...
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Spatial Join of 2 line layers offset by minuscule amount

Let's say I have 2 line layers (green & red, in the image below) and I need to transfer attributes from one layer (red) to another (green) by doing a Spatial Join. The layers are identical, but ...
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1answer
381 views

St_OffSetCurve with self-crossing lines

I have about 50,000 linestrings in PostGIS. They represent routes along roads. But I want them to be (roughly) pavements (aka sidewalks) instead. So I need to move all the lines 3 metres to the left ...
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3answers
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How to Display Overlapping Lines?

I have multiple line layers that represent bus routes and many of the routes overlap (i.e. near terminals, transfer locations, etc.) Is there a function in Qgis which will display both features next/...
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1answer
6k views

How to create a line in a given distance to an existing one?

I am looking for a possibility to create a second line in a given distance to an existing line. The existing line is curved, so simply create parallel line segments with CAD tools will not work. Any ...
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1answer
127 views

Editing represetation question

I'm new with editing so I need help. I have several lines (one feature class) which share the same location (cables) but I want to represent them as lines that are next to each other because they have ...
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0answers
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Creating parallel lines in MULTILINESTRING table using Postgis? [duplicate]

Possible Duplicate: How to create one-sided buffers or parallel lines in PostGIS? I need to make parallel lines on a MULTILINESTRING table, similar to st_buffer, but that the result come be lines,...
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2answers
2k views

Using “Merge Divided Roads” tool with lesser parallel lines

When using the "Merge Divided Roads" tool, it merges roads that "trend generally parallel to one another". This means that from figure one.. It will merge the beginning, where the roads are close to ...
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2answers
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Tracklogs to single line OR several lines to one line?

Setting: I have several trucks driving out of my factory delivering goods and coming back for more deliveries. These trucks are equipped with GPS so that they may return tracklogs to me. These ...
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5answers
2k views

Simplify shapefile parcel layer

I have a very large shapefile with over a million parcels within it. The problem I am having is that the polygons representing each parcel are very jagged. What I am looking for is a simple and fast ...
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4answers
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Creating one-sided buffers or parallel lines in PostGIS?

I'm looking for a way to create so-called one-sided buffers or parallel lines in PostGIS. Example: 1. buffer, 2. one-side, 3. both-sides I've found some discussion on the mailing list from 2009 and ...