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

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What determines direction in “Hatches”?

I created a route layer that uses hatches to help determine addresses along a street centerline. About 90% of the time, the hatches go up from zero in the direction that the line was digitized but ...
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1answer
23 views

Does ST_GEOMETRY support Linear Referencing

I am wondering if the ArcGIS ST_GEOMETRY provides Linear Referencing functions, such as creating a point based on a given measurement, like Oracle Spatial. I couldn't find any function like that in ...
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27 views

ArcGIS Linear Referencing successive overlay operations

I have 8 tables with RouteID, BeginMeasure and EndMeasure. I want to successively overlay them starting with the first two and then overlaying the result and the next table then the result of that ...
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1answer
40 views

Best method to find routes from a set of points

I have lines table (postgis enabled database) representing the streets. I have collected few gps points along a route and I would like to match it with the streets in order. Scenario - I am jogging ...
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1answer
33 views

creating shortest route using line segment layer as network locations

Using Arc10.2.1, trying to create a truck route that begins at one location on a county street grid and ends up in the same place, obeying a feature class of guard rail line segments throughout an ...
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2answers
241 views

ArcGIS 10: Create an event linear layer from a point layer based on directionality

I have a point layer that reflects the speed limits and a line layer of the roads. The location of the speed sign indicates in which direction the speed limit applies. How can I make linear event ...
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1answer
74 views

How to make a route event layer?

I'm using ArcGis 10.1 but I'm a beginner in this program. I want to make a route event layer based on a route I have already defined. My question is in the third line when the program ask me for an ...
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47 views

Transfer begin and end mileposts values from points on to a route

I have been trying to perform the segmentation of Road Network based on mile markers. I do have begin and end mile posts for route segments but they are county cumulative mile posts i.e. one segment ...
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2answers
100 views

How to find measures of points that are close to route in ArcGIS 10.2?

What I have is a route layer of a river and points layer with associated temperature data (temperature of the river) that were collected using an airplane. The path of the points does not match the ...
2
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1answer
90 views

How to access M-values in QGIS?

I am working with Linear Reference Systems and I know is very easy to get M coordinate (M-value) from a shapefile in ArcGIS. But, how to get the M-value in QGis? If you have doubts about my issue, ...
2
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0answers
128 views

Snap points to line and calculate chainage using Open source GIS

I have a line layer (representing a pipeline) and a points layer (representing valves) and I would like to calculate the chainage of the valves along the pipeline. I assume that I would first need ...
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92 views

PostGIS: How to distinguish overlapping routes (i.e., LineStrings) based on their direction?

I have a set of routes which are represented by LineStrings in my PostGIS database. These routes represent journeys that people make. I want to come up with routes that (a) overlap, and (b) have the ...
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1answer
62 views

Get the vertices on a LineString either side of a point (Sql Server 2008)

I have a point that sits on top of a LineString, both Sql Geometry types. POINT('0.5 0.5') LINESTRING('0 0 NULL 1, 1 1 NULL 1') I want to find the vertices of the LineString that lie either side ...
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54 views

Using M 'Measure' value in SQL Server 2008

MS Sql Server 2008 geometry type supports adding Z and M values to geometry objects, including linestrings. However, I cannot find any way to make use of these values, since methods such as ...
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180 views

Linear Referencing : Locate Features Along Routes [closed]

I've ran into a bit of a roadblock using this tool. I have roughly 3 million points that coincide with 200,000 routes. My routes have the From/To measurements, and my points contain X,Y data for ...
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1answer
35 views

Cleaning up Line Features

I'm in the process of creating some routes for which I need left and right sections. I have an original streets feature class, which I used "copy parallels" on, and came up with something like the ...
2
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0answers
226 views

How to use the linear referencing plugin?

I need a guide how to use this plugin properly, I'm a newbie on PostGIS and I'm trying to use the linear referencing plugin of QGIS. I've created a database on postgreSQL with the postGIS extension ...
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1answer
220 views

Calculate distance of points along a route QGIS

I have a line layer and a point layer, I need the distance between the first and the last point measured along the line. How can I do that using QGIS? Do I need to know linear reference? I don't ...
2
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1answer
69 views

How to get location of Milestones from Linear referenced data?

I have shapefile of highways, where each segment has the information indicating the starting mile and ending mile. Using these fields, I have created Routes, using the 'Create Route' gp tool from the ...
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1answer
57 views

How to locate events at intersections using linear referencing?

I am having problem in locating intersection crashes. Actually I have intersecting legs with their specified begin and end mileposts. I am trying to locate crashes based on the milepost values. ...
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2answers
184 views

Postgis 2.0 - How to get a Point from given LinestringM and a measure?

If I have a cable route linear referenced and stored in a LinestringM with M value is the length (in meters) from the start of the route - for example: LINESTRING M (0 0 0, 10 0 20, 12 0 40, 20 0 50, ...
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43 views

Linear Referencing Bunching up Points

I am having an issue working with Linear Referencing. I have tried this with both ArcGIS 10 and ArcGIS 10.2 and I'm having the same problem. It keeps bunching up the points at the vertices of the ...
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58 views

Get distance after path distance allocation

I use ArcGIS 10.1 in Windows XP. I have a two point feature data sets One containing a single point P1 and another containing multiple points Pm. I computed the minimum-distance path from P1 to each ...
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2answers
143 views

How to identify gaps in linear point data in FME?

I have been given a spreadsheet which contains coordinates of welds along a pipeline. I'm using FME to create points from the coordinates. On average, the points are roughly 11 metres from each ...
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2answers
325 views

How to divide polyline into 1-mile increments?

I have a river shapefile that I need to break up into 1-mile increments. The polyline is 53 miles in distance, so I should I have about 53 mile markers as a result. I have tried the Divide tool, ...
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1answer
288 views

How to use the QGIS Linear Referencing Plugin?

I'm having trouble getting the Faunalia Linear Referencing Plugin set up properly in QGIS 1.8. I've gotten to the point where I can do the Calibration, but I get a few warnings about missing lines, ...
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1answer
486 views

Measuring Distance from Point to Point Along a Path in ArcMap

I am looking at a village and want to find the distance from each house (point) to the pagoda (point). However, I want the distance to be measured along a path (which I digitized as a polyline) and ...
0
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1answer
21 views

Finding measurements of unknown points relative to reference points with known lat, long and measurements?

I am trying to measurements of the distance of multiple points relative to reference points of known latitude, longitude and measurements along a river. Is there tool that can do this? Would ...
2
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2answers
252 views

How do I snip/split polylines at chainages?

What is the best way to snip/split lines at chainages? E.g I have a csv with the uniq ID of the polyline item and a start and end chainage. I want to extract the lines between the chainages stated. ...
2
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2answers
52 views

How to begin creating a linear referenced gdb with NHD

Our legacy fish distribution data contains data by reaches. Reaches are arbitrary locations on streams, eg. reach 1, 2, 3. Each reach's from-to are known, but not by x,y coords. An example is 'brown ...
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184 views

“locate features along routes” tool results in empty table!

I have no idea why the result table of the tool "locate features along routes" is empty. I have a stream network and a cross-section layer. Here is what I did: 1- Converted my stream polyline ...
2
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1answer
66 views

How to compute the distance from the beginning of a line for every points using postgis

I have a line, for which I need to know, for every point that compose it, what is the distance from the beginning. The data is stored in PostGis 2.0 For example, for the line with the point a, b, c, ...
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1answer
54 views

ArcMap ArcPy - Place signs with no lat/lng on map

I'm new to ArcPy and ArcMap but I do have programming experience. What I am trying to accomplish is to take over 22,000 signs from a database and place them on a map in reference to a street layer ...
0
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1answer
93 views

“Invalid feature class type” for input feature while using “Locate Features Along Routes”

I am getting ERROR 000810 (Invalid feature class type) when I add my stream shapefile as an in_routes. That is really weird to me.
0
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2answers
110 views

Why does ArcGIS 10 Calibrate Routes give Error 000443?

I am trying to calibrate routes using points along them. Those points are represent counts of hikers per hour. I have done a spatial join between my route layer and my points to have the RouteID in ...
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2answers
110 views

Change the starting measure point of a route - linear referencing

I have a few routes created and stored as a feature class in a GDB. When using the create route tool there is an option to choose the starting point of the routes. However, I only have certain ...
0
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1answer
105 views

ESRI Linear Referencing and negative lengths

I have been asked this question regarding Linear Referencing (for Arcmap 10.1), but i do not have much experience with it so I am hoping someone out there can help. Essentially, I want to know how ...
0
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1answer
77 views

trace a transmission line for a certain distance

I’m looking for a way to easily trace a transmission line for a certain distance. Here is the scenario that I am working with. We have an issue with our transmission line; our OMS tells us that there ...
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1answer
76 views

Writing length of line along the line

I sometimes have to write out the length along a line for every couple of hundred meters or kilometers. This applies to pipes, when the construction team wants to know where along the pipe they are or ...
0
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1answer
195 views

Create road speed limit segments with linear referencing

I have a route-feature class and a point feature class with speed limit signs. In ArcMap I am capable to reference the signs on the route with help of a reference field and using the locate features ...
3
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1answer
761 views

How to create perpendicular line from point on one line to an intersection with the nearest polygon layer?

I am trying to create laterals from a layer of sewer mainlines and have yet to Google a thoroughly helpful answer. Hoping to find some help here. I have a layer of mainlines that have a direction ...
2
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0answers
106 views

Problem to transform events from one route to another

I have a road feature class layer containing parts like 1_10, 1_20. 2_10, 2_20... etc. 1_, 2_ is later used to create the route and _10, _20 is indicating the direction (the road feature classes were ...
2
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0answers
204 views

Linear Referencing Methods: Station Equation origins

DEAR PEOPLE FROM THE FUTURE: Here's what we've figured out so far… I am working in the pipelines field, and I get in touch with the concept of the linear referencing methods, specifically with ...
2
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2answers
403 views

Get Point at distance on a LineString using NetTopologySuite

I am quite sure there is a function in NTS that actually gets us a point at a distance along a line starting at first vertex. I am using NetTopologySuite version 1.12.1. In Shapely, the python ...
6
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1answer
255 views

NYC Subway Line Station Order?

I've currently got data on the NYC subway stations (including name, position, and how many people entered and existed during a timeframe). Also, I have the data on which stations have which train ...
0
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2answers
214 views

How to create a route and add that route as layer to map using ArcPy?

I wrote a little script for ArcGis, and when I make it run by GUI it happens that it seems to create routes but the routes do not appear in the TOC. Consequently, when the script tries to execute ...
8
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2answers
640 views

What is an “XYZM” measurement model?

SpatiaLite supports a remarkable number of different dimension models. Interestingly, some of their values support a "measure" coordinate (XYM, XYZM). How would this measure-coordinate be used, and ...
4
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1answer
55 views

Why would running LocateFeautresAlongRoutes GP tool return null?

I'm currently using the LocateFeaturesAlongRoutes tool wrapper for C#/.NET for a custom tool I'm developing for ArcMap 9.3.1. I've been able to run this tool in ArcMap outside of code in a tool with ...
5
votes
3answers
1k views

FME - Calculate distance of point along a line

I have created an FME workspace which inputs a pipeline as well as other linear features which cross it (waterways, roads, railways, fences, other pipelines, etc). The output is a point file which ...
4
votes
1answer
146 views

How best to map lines based on multiple attributes?

I need to plot lines onto a map to display road quality. I'm already using colours to distinguish between different road conditions, but I also need to display another factor - the survey origin. ...