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

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21 views

Find nearest upstream sensor to Event data

I am a newbie to ArcGis. I am trying to find out the nearest upstream sensor to an accident data table . The inputs that I have are: Sensor details: Latitude, Longitude, Road Name, Road Direction ...
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20 views

Dividing stream network of specified lengths in ArcGIS for Desktop? [closed]

we are trying to find hydro power potential of river basin by using ArcGis and SWAT ,we have created stream network ,but unable to divide stream network at 500mts interval, unable to find the tool
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22 views

Perpendicular Distance Markers on Polyline in MapInfo?

I have added chainage to a creek polyline in MapInfo v11.0.3 using the 1999 version of "Distance Marker" by Meridian. It looks poor as it does not have the functionality to create the markers ...
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1answer
39 views

Geocoding Street Segments Based on Extents in ArcGIS for Desktop?

I have a list of projects that need to be geocoded or drawn through some sort of automated process in ArcGIS 10.3 for Desktop. The are listed by primary street, a begin street intersection, and an end ...
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54 views

Interpolate missing M values along a line

Is there some way in PostGIS to interpolate missing M coordinates in a geometry like this? select ST_MakeLine(ARRAY[ ST_MakePointM (0, 1, 10), ST_MakePoint (0, 2), ST_MakePoint (0, ...
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1answer
28 views

How to change Linear Units

I have an ESRI feature class whose coordinates are 38.263, -122.672 Meters. When I load it into a data frame that uses the GCS_NAD_1983_NSRS2007 datum and the ...
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30 views

Locating Multiple Points on Mutlipes routes by a Unique ID

I'm trying to get a "MEASURE" for Points along a route. I need ARCGIS10 Desktop Linear Referencing tools or other application to use a unique identifier to match the Lines in the route to points ...
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37 views

How to intersect two polyline layers? [duplicate]

I have two line shapefiles that overlap 50% of the time. I want to generate a new single shapefile that includes attributes of both datasets AND no duplicate segments. A short segment from one layer ...
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22 views

Selection Based on Range of Values from another table

I'll try to explain this is as simply as possible. I've figured out how to create this table in SQL, no problem. But I'd like to have this done in python as part of a larger model. I have a feature ...
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2answers
73 views

Creating coordinates from beg and end points on a line [duplicate]

Is it possible to create WGS-1984 coordinates from the start and end points along a line segment? The line features were created using linear referencing but now I need to create lat and long ...
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29 views

Offsetting points from lines using SQL Server Spatial?

I'm new with SQL spatial data processing, so I'm not sure how to solve my task. I have two tables - table with lines and table with points that are located on lines. Lines and points are related by ID ...
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2answers
48 views

Labeling at M value vertices only?

How would one label at M value vertices only? We have added M values using linear referencing and now would like to label stations at the vertices.
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102 views

Find the point distance along a streams polyline?

Working in ArcGIS. I am looking for a way to find the distance of a point along a streams polyline. I read Finding distance of point along polyline? and it seems to be similar to what I need...the ...
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1answer
38 views

Plotting new offset points in ArcGIS for Desktop?

I have a task where I have plotted positions along an alignment (see red dots in images) and I need to plot two offset points (from the chainage locations) at varying distance parallel to the ...
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1answer
38 views

Line sections between points in ArcMap?

How to get shape with lines between points which have to lay on the same line entity?
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39 views

Measuring distance on line geometry with ArcGIS IOS

I'm developing an IOS application which should run offline and need a feature; I want to be able to calculate distance to a point from the start of a given line geometry. With ...
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3answers
87 views

Using linear referencing in ArcGIS to plot line data

I have just started using the linear referencing tools in ArcGIS 10.2 but I'm having a bit of trouble. I'm trying to plot schemes as line data on to our road network layer which is also line data ...
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2answers
201 views

Arcpy.da.SearchCursor to retrieve the min and max measure values from Polyline-M shape

Is there a way to use a search cursor in ArcGIS to read the minimum measure and maximum measure values of a linear referenced route layer using arcpy? My goal is to build a route event using the start ...
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25 views

Shapely's object.project method dealing with overlapping polyline

So I am interested in knowing how far along a polyline a given point sits. Python's shapely package has a method to do such a thing, see the below code: from shapely.geometry import LineString ip = ...
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1answer
104 views

How to get polygon distance from a route?

I need to calculate the location of polygons along the route in ArcGIS (ArcInfo) 9 or 10. What I have already found out is only the calculation of the start and end of the intersection of a polygon ...
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2answers
126 views

Is there any tool to execute Postgis-like queries without a postgres server?

I would like to know if there is any way/tool of using geoprocesing queries like the ones you use with POSTGIS but without the need of having an actual database server available. The particular ...
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1answer
103 views

How to register “events” for linear referencing in pyqgis?

Is there an easy solution for recording events for a line crossing borders of zones in a polygon layer? I need to implement this in python using QGIS, thus pyqgis. The image attached illustrates what ...
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106 views

Locate features along routes when features are parallel

I am trying to use Esri's Linear Referencing Tool to conform a drawn line to a road route. I have a fairly large search radius of 20m. As long as the line I draw touches the route at some point, ...
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85 views

SQL Spatial Tools package - linear referencing

The SQLSpatialTools package website seems to be temporarily down, so I cannot access the article on linear referencing tool posted there at the moment. Is it possible, by any other means, to obtain a ...
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2answers
116 views

Create point on a line with given distance from end in PostGIS

Does anyone know how to create points along a line (MultiLineString geometry) with a given distance in PostGIS? I'd like to create points at a regular distance over a line, which represents a ...
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70 views

Dynamic segmentation with respect to a control factor

Is there a way either with python scripts or other solution to dynamically segment a table with linear measures (from-to fields) Each segmented section (from-to) should have all the item numbers ...
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91 views

How to publish linear referencing capability in ArcGIS for server?

I created a linear referencing event and want to publish as linear referencing service in ArcGIS for server . The problem is when i want to publish, High warning shows the linear referencing event ...
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41 views

Make Route Event Layer snaps event points to vertexes?

In ArcMap 10.2.1 I have made a route event layer using the geoprocessing tool in the normal way, trying to add equidistant route events along a route every 1.6 meters. This works fine in all the ...
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1answer
141 views

Alter the M values of an existing route

I have a Polyline ZM shapefile. The M values are in metres. I want to change the M values to kilometres. Seems simple enough, but I can't find a tool to do this. There is only one route in the ...
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1answer
97 views

How to access shapefile m-values with pyqgis?

Does anyone know how to access (read/write) m-values of a line-shapefile using pyqgis? I know how to do it with arcpy cursors ...
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75 views

Object: Createobject Layer Invalid Data Source

I'm using a tool made for ArcGIS, however I keep getting this error (see picture). I do not know any python code and I'm trying to get this script to run. # Import system modules import sys, ...
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160 views

ArcPy QueryPointAndDistance: Incorrect Lengths?

Background: I'm currently trying to determine the chainage (distance m) of my points along a polyline (i.e. proposed railway alignment). A colleague within my firm assisted me with the following ...
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1answer
58 views

Saving a calibrated route in QGIS for “future” use

Can a Calibrated Vector (after using LRS) be saved with M values, so that the file does not have to be calibrated every time is used? We're currently working on State road data, and it has many ...
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89 views

How can I extract the measurelength, highmeasure and lowmeasure of routes in ArcGIS

I'm trying to create road Routes in ArcGIS, which traditionally have been created using workstation. I've managed to write a Python script to do this, however, unlike ArcInfo, the attributes ...
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1answer
69 views

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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1answer
94 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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145 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 ...
2
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1answer
444 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 ...
2
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1answer
127 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
407 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: ...
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1answer
539 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 ...
4
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1answer
34 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
163 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 ...
2
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0answers
66 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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2answers
46 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 ...
2
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0answers
94 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 ...
5
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2answers
295 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 ...
2
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2answers
286 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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23 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
178 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 ...