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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11 views
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 ...
2
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0answers
24 views
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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1answer
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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6 views
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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2answers
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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0answers
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 ...
1
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1answer
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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1answer
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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0answers
16 views
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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17 views
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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20 views
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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1answer
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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0answers
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 ...
4
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1answer
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 ...
10
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2answers
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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1answer
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. ...
2
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2answers
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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0answers
37 views
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 ...
1
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0answers
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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0answers
11 views
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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0answers
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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0answers
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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0answers
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 ...
9
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1answer
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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1answer
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 = ...
2
votes
1answer
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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0answers
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 ...
0
votes
1answer
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" ...
1
vote
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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0answers
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 ...
0
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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 ...
2
votes
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 ...
1
vote
1answer
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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0answers
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 ...
0
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1answer
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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0answers
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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0answers
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 ...
2
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0answers
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 ...
5
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1answer
155 views
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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0answers
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 ...
1
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1answer
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 + '\\' + '...
2
votes
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 ...
0
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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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1answer
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, ...
0
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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 ...
2
votes
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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0answers
31 views
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 ...
