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

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How do I display hatching labels in a different route measure unit than my coordinate system?

I have a route that crosses several states from west to east which is in the USA_Contiguous_Lambert_Conformal_Conic coordinate system. The linear unit of this coordinate system is in meters. I would ...
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44 views

Creating Route events in ArcGIS

In ArcGIS I have a set of routes, some of whose direction I change using the flip edit so that they are in the direction I require. I am able to make route event layers. However, why is it that after ...
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1answer
26 views

Linear Reference initial datasets

I am trying to work with Linear Reference system as I found It in ArcGis website: http://resources.arcgis.com/en/help/main/10.1/index.html#//003m00000002000000 But I'm losing something in the ...
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4answers
462 views

Redistribute linestring vertices to specified distance

I use a groundwater model program called GMS, and it has a very useful function "Redistribute vertices" (more info). I use this function all the time to both simplify and provide regular spacings ...
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2answers
714 views

Calculating the distance between points and multiple lines?

I have a point shapefile of about 100 points and a polyline shapefile of about 200 lines and I am interested in finding the distance between every point and each individual polyline. My polyline ...
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1answer
46 views

How to measure an irregular road line in QGIS?

I'm trying to measure the distance between some coordinate points along a road line from an OpenStreetMap source map, I am using QGIS 2.4.0. My problem is to find a way to measure these distances ...
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1answer
58 views

How to find chainage of points using LRS

I have a Shapefile of road that I have converted from a KML file (created on Google Earth) and a txt file containing lat long (from GPS) of points with some attributes. The points are not exactly on ...
4
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1answer
286 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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2answers
366 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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4answers
271 views

Split lines into non-overlapping subsets based on points

Given a table with line geometry, and one or more points that are snapped to this line in a separate table, I would like to split each line with one or more intersecting points at each of the ...
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1answer
138 views

QGIS Linear Referencing

I'm not sure how to ask this. Essentially; I work for a survey company doing gas lines GIS. We use QGIS. We create hand drawn sketches of pipelines containing all sorts of information including: ...
3
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1answer
93 views

How to find Chainage of points using QGIS

I have two types of Road shape files. Road (Polyline) and important points (waypoints) along the road. Both of these shape files are prepared using GPS. I want to find the chainage of the points. Is ...
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2answers
531 views

ArcGIS Server Object Extension for Analyzing Linearly Referenced Data

I have just begun learning about the ArcGIS Server Object Extension (SOE) capabilities, specificially with ArcGIS 10. Is there an example available of an SOE that can return information about ...
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1answer
28 views

What is the level of error I should expect when using a NAD StatePlane CRS from an adjacent state?

I am adding Georgia data to my GIS database and, unlike the California data I've added, have decided to use my existing EPSG:3361 (South Carolina StatePlane) coordinate reference system for ...
2
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1answer
57 views

How to Create in Route Event layer with Right Angle?

I have collected GPS points along the road. and got Right angle Tape measurements of Boundary walls and other objects from that respective points. I have those records in Excel Sheet and GPS ...
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2answers
28 views

Building linear m values

I had to manually build m values for hundreds of levees (in the downstream direction) and wondering if there is a way to check that I didn't miss any levees. Is there a way I can look-up a table with ...
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0answers
41 views

PyQGIS: standard and advanced linear referencing possibilities

I'm aware of the existence of the following QGIS plugins: QChainage Event layer linear referencing LRS Although, all of these tools offer some linear referencing capabilities, I find that they ...
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0answers
55 views

Linear Referencing along a polyline

I'm trying to use the "Locate Features along Routes." I have a simple polyline and I have an excel sheet of To and From miles. The excel sheet has no X&Y coordinates. The excel sheet has the ...
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1answer
460 views

How to store historical versions of road (route) portions?

Part of my job is to analyze certain portions of road for our clients. A client will ask, I want to look at Road A from parcel XYZ to parcel RST and Road B from parcel RST to parcel OPQ. The way I do ...
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2answers
211 views

Arcpy: Names and distances of nearest intersecting roads in layer 1 to end points of a road segment from layer 2

As shown in the image below, I'd like to return a new field in layer 2 that for each segment stores a string:"Road C, 1 km from Road A to 0.5km From Road B". Calculation of the distances could be ...
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20 views

How to use linear referencing in Informix DB with Spatial Blade?

Is there any simple solution to use linear referencing in Informix Database with Spatial Datablade?
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2answers
32 views

How to change/identify Linear units in Near Analysis Attributes Table

I need to get the closest distance from multiple points of a multipoint feature to a polyline that delineates a land contour. To do this, I used the Near(analysis) feature. It worked, but I can't tell ...
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1answer
158 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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21 views

Is there a tool to split self-created measurement values?

Is there any way to split created measurement values across multiple polylines? For example, if there are two lines that each have F_MEAS=0 and T_MEAS=0.5, is there any way to choose both edges, say ...
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1answer
85 views

ArcGIS Linear referencing tools duplicating records and erroneous measures

I am using LocateFeaturesAlongRoutes_lr, MakeRouteEventLayer_lr, and MakeRouteEventLayer_lr to combine three different overlays into one based on this question I asked month ago. The code is as ...
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4answers
954 views

How to preserve the original direction of NHD segments when creating a route using the gp.CreateRoutes_lr tool?

I am trying to figure out how to preserve the original line direction of NHD High Resolution data that I am selecting out and creating a route with. I'm using ArcGIS 9.3.1 and this is a python script. ...
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52 views

Query Data from an Event Table in ArcGIS (Linear Referencing)

My goal is to store a bunch of past present and future Events in a central place from different vehicles, query those tables on demand and display the result in ArcMap. Note that right now, my Route ...
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55 views

How to locate M values in ArcGIS Silverlight API?

I am trying to work with M values in the Silverlight API. I gather that the IdentifyParameters would be used to identify a milepost by clicking along the line, but what would I use to query an M ...
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1answer
131 views

Adding Route Shapefile (PolylineM) to QGIS?

I'm new to QGIS (and to this amazing forum as well) and I already have an issue : I received a Route Layer in SHP format (PolylineM). I've easily loaded this file into QGIS but it doesn't seem to ...
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1answer
281 views

Merging and joining two line feature classes while maintaining attributes from both using ArcGIS for Desktop?

I created an event layer using the MAKE ROUTE EVENT LAYER tool based on anticipated scheduled events. The road layer which is the base layer is intact. What I would like to achieve is combine layer ...
4
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2answers
365 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. ...
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1answer
293 views

How do I create measured line segments along existing polylines from a starting point?

I realize my problem may be solved using Linear Referencing, and if that's the case I'm looking for help figuring out the workflow involved there. I'm working in ArcGIS 10.2 Desktop Basic, and this ...
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2answers
176 views

Linear referenced data driven pages

I am trying to create a form of data driven page that incorporates linear referencing very similar to the "Linear referencing scenarios" example: I have a map that I will display on each page that ...
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41 views

Linear referencing in Geographic Coordinate System (GCS) using ArcGIS for Desktop?

I want to make a new line segment in event table with linear referencing ArcGIS 10.2 for Desktop. I'm using two tools: Create Route with input line feature in Geographic coordinates system and ...
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2answers
121 views

Move points along a line, 100m left or right

In ArcMap 10, I have several hundred points taken along a zig-zag transect (line) but I need to move these points 100m to the left or right, perpendicular to the line. The points are stored as a ...
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1answer
102 views

Getting error Route without Measure from Make Route Event tool?

I'm using make a route event tool, i want to generate lines that have specific measurements. I made sure that the properties of the polylines were Polyline M as opposed to polyline, as well as my ...
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40 views

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 ...
2
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1answer
84 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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1answer
54 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
24 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 ...
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1answer
73 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 ...
3
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184 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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6answers
3k views

Get a point on a polyline from end points given distance along poly line

I have start point and end point of a polyline. How can I get a point on that polyline from end points specified by the given distance. How can I get this by using arcpy provided that this script ...
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1answer
75 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 ...
8
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2answers
308 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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5answers
15k views

Finding distance of point along polyline?

We need to find the distance of a series of point along a given polyline. We have a polyline dataset repsenting rivers in a catchment, broken up into river reaches (FID 1 through 35 for example). We ...
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1answer
338 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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72 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
221 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 ...
3
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1answer
143 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, ...