Questions tagged [linear-referencing]

Linear referencing is the method of storing geographic locations by using relative positions along a measured linear feature.

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Create distance intervals along a Route + Cross Section

I believe I've done this before but years ago. My goal is to make a X-Section of a line using a DEM. I want to create a Route (from a Polyline), give this route 1k intervals, and then "drape"...
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21 views

Allocating distance on the road element in ArcMap

I have 2 input files- Road. shp with road names and excel table with road names, and start and end measures in Meters (Join field (Road names) The road has different directions, after dissolve or ...
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Linear Referencing and Z measurements

I am trying to build a linear reference route that uses the DEM derived distance instead of the default 2D distance. I have tried this How To (https://support.esri.com/en/technical-article/000008984) ...
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34 views

Creating lines along calibrated polyline from M values in ArcMap

I have an M-value enabled polyline feature class and from-to M-values of lines. The polyline is already calibrated. Is there any way to create line along the calibrated polylines or get that segment ...
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Where to store line events associated with Pipeline in UPDM(2019)?

I am migrating pipeline data to UPDM(2019). The current pipeline database has geometric network that needs to be migrated to Utility Network in UPDM. I have mapped the relevant feature classes i.e ...
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28 views

Storing information for each segment of spatial line

I have some spatial lines from a shapefile representing roads. I'd like to attribute to each segment an information, for example the state of the segment or more generally a scalar that gives an ...
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36 views

Improving display speed of a virtual layer in QGIS

Following on this question. I have a set of reference lines and a non geometrical table of events. This table contains the mileage of the event along the reference lines, amongst other attributes. I ...
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17 views

Find sublines, given initial and final offsets, via the command line

I have a CSV file that looks essentially like this: id,id_wkt,start,end,wkt 11,11,0,43,"LINESTRING(3.3623676 51.3132714,3.3626663 51.3130068,3.363068 51.3126811,3.3636323 51.3122504,3.3640754 51....
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37 views

How to write route with measure to PostGIS with FME?

I have calibrated route in file geodatabase (ArcGIS). I have line coordinate (kilometre) in the start and the end point. I try export this route with M-value to PostGIS in FME. But in result I have ...
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Registering new event based on non-event feature class using ArcGIS Roads and Highways

I am using the ESRI Roads and Highways extension for ArcGIS Desktop 10.6.1, and I would like to register a new event based on a non-event feature class. ESRI recommended I use the "Locate ...
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Get measurement values from point along the route Arcmap [duplicate]

I have two shape files, one is a route shapefile with polyline and have measurement values. The other one is point with coordinates but no measurement values. I am trying to snap the points to closest ...
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Odd false negatives for “distance to route” values when using linear referencing in ArcGIS Pro

I am having a curious problem that I am not sure how to trouble shoot, and I am hoping someone here may have an idea. I have a large array of points (1m X 1m grid), that I have overlaid and clipped ...
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36 views

ArcMap calculate distance (from and to) from a points shape to the lines shape table

I am trying to calculate the From and To fields in the line table. I have got a points shape and i have got a line shape. ( see for example the figure bellow.) The points( in red ) intersect with ...
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53 views

How to calculate interpolated timestamps of linearly referenced points in ArcGIS?

I have a point feature class with timestamp attribute belongs to bus-gps smartcard data-set. I've used linear referencing tool to snap these points to a bus-route. So there are milepoints in the ...
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52 views

Creating a points layer from a CSV file with distances along a line, based upon a known vector in QGIS?

I have transect data with know start and end lat/long and length for each transect, which I have made into a vector shapefile in QGIS. I want to add points for each sighting along the transects, which ...
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146 views

Linear referencing to calculate maximum distance between points by group along line (river system) using ArcGIS Pro

I am using ArcGIS Pro. I have a series of points representing animal locations that were tracked in a small stream. I would like to get the distance between the most upstream and downstream location ...
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166 views

Writing out PointM shapefiles from QGIS

I have a PointZM shapefile and I would like to drop the Z value and just write out the PointM values to a new shapefile (I'm trying to test a shapefile reader so other formats are not an option). If ...
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125 views

Creating linear event table from geometry using QGIS Linear Referencing

I am trying to find a way to dynamically create an event table from a linear feature. Imagine the example below. Registration of a sidewalk/fence or similar. The colours represent different routes. ...
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94 views

How to create a line feature which contains the overlying polygon attributes?

I have a road network Shapefile which intersects a polygon feature class. I need to create a excel table which contains the road number, the attribute from the intersecting polygon feature class and ...
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Handling events that cross more than one route using Linear Referencing of QGIS

I am working on implementing linear referencing. How would you deal with the situation below? Where an event is stretched across two or more "routes". At the moment I am playing around with the ...
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237 views

Trying to understand QGIS LRS plugin - How to implement?

I have been trying to understand how to implement the LRS plugin but there are many things that does not "click" in my head. Not sure if it is the terminology or the process i dont understand, please ...
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Route Events Not Updating

I have created a route events point field based on a table. When using version 10.2 on a previous computer, the route events would update when the values in the table were changed. You would ...
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75 views

Locate features along routes: measurement unit output?

I am using ArcMap version 10.3.1: I have a polyline (also converted to a route feature) and points layer. All points lie on the line. I want to calculate the distance each point is from either the ...
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12 views

LRS plugin dropdown selections not working

I have just loaded the LRS plugin but when I try to access the layer with measures drop down selections on the measure tab they are not working. Calibration drop downs work and so to do the layer ...
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21 views

Get the measure M along a CircularStringM in PostGIS without first converting to a LineStringM

I've been struggling to get PostGIS 2.5 to run any linear referencing functions on geometry containing curves (CircularStringM, CompoundCurveM for example). Is it possible to get the measure M along ...
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191 views

Linear referencing using QGIS only

I would like to do some basic linear referencing (label the distance along a line every 1000 m e.g.) without using plugins or PostGIS or creating points along the line. I tried working with ...
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83 views

Linear Referencing using Python only

I am using shapely to snap points to a line. This is the piece of code I use import geopandas as gpd gdf_segments = gpd.read_file("line.shp") shply_line = gdf_segments.geometry.unary_union point = ...
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278 views

Find order of points along polyline

I have a points layer with random points located along a route (polyline layer). I was wondering if there is a simple way to give a sequence number to each point in the order they show up along the ...
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26 views

Importing 3D DXF and using LRS

I've got a dxf in AutoCAD with a different Z value in each vertex. I'm importing this dxf to QGIS and running the LRS plugin to work with some chainages. My problem is that when running the chainage ...
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54 views

Create routes when the measure source is not “length”?

I need to do some linear referencing work with a network of lines with specific beginning and endpoints. The first step is to take the network of lines and use the geoprocessing tool "Create Routes" ...
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1answer
223 views

Locating features along route in QGIS?

I have a polyline and points layer. The points lie on both sides of the polyline at some distance. I want to calculate the minimum distance between all the individual points and the polyline. I can ...
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225 views

Making route event layer in QGIS?

In my situation: I have a CSV file with information about specific road segments: Road number, start kilometer, end kilometer. And I have road shapefile with Road numbers. The task is to create a ...
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1answer
77 views

Linear referencing - Make Route event layer: wrong spacing of points along route?

I want to simulate the ArcGis tool Generate points along line with linear referencing tools (we don't have the licence for the former). Our methodology is to create/use a line create an excel table ...
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1answer
57 views

Finding points along lines, given lengths along those lines, using QGIS?

I have one layer with a network of lines and a second layer with its associated line and its distance along that line. Is there a way to generate points for all these rows along their associated ...
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105 views

“Locate features along routes” tool and line features - how to use XY tolerance?

I am trying to use the "locate features along routes" tool to map guardrails to a route, but I'm seeing some very strange behavior. As a test case, I'm selecting a single guardrail (pictured) that is ...
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50 views

Reducing excessive segmentation from Linear Referencing? [closed]

Can anyone suggest a resource which discusses different approaches to cleaning up linearly references events in order to minimize the occurrence of small dynamic segments? I'm working with many ...
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79 views

Changing kilometer to lat/long in roads using QGIS?

I have accident data that I take them from the police station, unfortunately, they save accident point as a kilometer from that police station instead of lat/long. also, I am working with QGIS, now I ...
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1answer
229 views

Display route Events option in ArcGIS Pro

In ArcMap you can add event table and route reference feature class and when you right click on event table there is an option display route events. I am struggling to find that option in ArcGIS Pro. ...
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62 views

Mapping objects/assets along polygon line using ArcGIS Pro?

I am working with an open rail data set which is imported to my ArcGIS Pro project. The rail data is loaded to ArcGIS as a shapefile and includes kilometer notation for a specific rail segment. The km ...
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40 views

Segmentation of a line based on several overlapping lines within the first line

I stumbled over a problem which I can't figure out myself so maybe you can help me.. I have a line going from 0 to 100% of its length. On this line I have 1:n lines with different information and ...
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109 views

Creating points with linear referencing

I have traffic data that shows tracks that have start and end times (in YYYYMMDD-HHMMSS format) and the speed (m/s) the vehicle was moving. From that I've calculated total traveled distance (m) and ...
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Are there any working examples of ogrlineref?

I'd like to understand how ogrlineref works but I can't find any examples. I'd like to see the actual "roads.shp" and "references.shp" mentioned in the example invocation: ogrlineref -create -l ...
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277 views

ArcGIS Make Route Event Layer, “ROUTE NOT FOUND” is output

I have a polyline shapefile that's about 200,000 meters long, and I am trying to get xy coordinates for specific distances along the line. The polyline shapefile is in UTM coordinates. I ran the ...
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313 views

Generating Points Along Line at irregular intervals using ArcGIS Desktop?

What tool do I use to generate points along a line from an input list of lengths? For example: Length_km 0.12 0.2 0.38 etc. ArcPy solutions are okay. I tried: testOut = outpath + '\\' + '...
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5answers
135 views

Use of linear referencing on a route that span over 3 different UTM zones

I have a long route (~2400 KM) that span 3 different UTM zones. (N - 37, 38, 39) On this route there is a sign every 1 km-approximately (km marker), these signs help in determining the exact location ...
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1answer
190 views

Using ArcGIS JavaScript to calculate length of line feature where clicked

I am working with arcgis JavaScript API and a linear referencing feature. I want to be able to click on a line of a feature and calculate the length from beginning of the line to where I clicked. Then ...
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38 views

Using dBase table converted from CSV to Make Route Event Layer?

I'm using the tool 'Make Route Event Layer' and I need to use a dBase table for the event table, but the data are saved in a CSV file. When I try with dBase table that I created myself all go good, ...
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1answer
156 views

Splitting line into segments of different length with ArcGIS Desktop?

I have a river network and I have to split each river into transects of different length. The distances where the lines have to be split are in an excel sheet. For example I have to split the river 1 ...
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1answer
391 views

Route event layer failing to draw all features

I am encountering some unexpected behaviour in attempting to use linear referencing tools to produce a route event layer for a road network. I have produced a polyline route shapefile from a ...
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Layers Created from table not saving?

I'm new to QGIS. I have imported a shapefile for a road network. I have then imported a table containing condition data about the network. I have used the LRS plugin and the data displays perfectly ...

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