A digital map feature that represents a place or thing that has length but not area at a given scale. A polyline feature may have one or more parts.

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25 views

Converting polyline data to polygons?

I am trying to convert some polyline coastline data into a polygon that I can use to clip/subset back other data sets by this polygon. There are some small gaps in the coastline data, which ...
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1answer
101 views

Creating a line along an existing polyline from a point

I have a large data set of points, all of which lie on a river network and have x, y co-ordinates. I want to calculate the slope of the river channel at each point from the underlying DEM by taking ...
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1answer
8 views

How to set a polyline length as per a given Image

I have an image of a map representing the road networks. I have converted these road networks into a shapefile with only polylines. I want to set a distance to this road network. For e.g I know from ...
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2answers
42 views

OGR DXF Closed Polyline Conversion

I'm trying to convert closed polylines into polygons using ogr2ogr from dxf to mssql. Here It says that polylines are converted into POLYGON if they are closed, but I always get the type LINESTRING ...
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7 views

How to break polylines within a network by overlapping polygon at edges of polygons [duplicate]

I am trying to achieve this Calculating length of road network within a polygon But I can't figure out how he can break polylines using what tool. I am using arcgis 10.2
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22 views

How to measure similarity of approximately congruent polylines

My initial question was posted here. The answer of whuber provides a nice solution for the case when polylines are congruent. However, the problem is that my polylines are approximately congruent ...
2
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1answer
159 views

How to create polygons from a polyline graticule?

I'd like to make a polygon shapefile out of a polyline shapefile showing a graticule. However, using the "Line to Polygon" tool results in a peculiar...something: Other standard tools like ...
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1answer
54 views

Spatial join 2 polylines without common attribute

I need to spatially join 2 polylines, but the problem is that the tables have nothing in common. Also, one of the tables is 4 times as big as the other one. Essentially, what is need is to combine the ...
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2answers
183 views

Rasterizing polyline data with QGIS/GDAL: custom line width

I need to make a raster from a polyline shapefile. However, when I use gdal_rasterize (either directly or through QGIS), all my lines are drawn one pixel wide, while I need them to be drawn with the ...
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18 views

nominatim api for long streets

I'm using the Nominatim API in geojson method to retrieve streets poly line. For short streets I have no issue and the results are good. However for long streets the data I'm getting back in the ...
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1answer
155 views

Shortest path to draw all polyline routes in geometric network without repeating

My problem is related to the "shortest path" problem, however it's slightly different in that I don't want to draw one path but to draw all paths without repeating any routes (as much as is possible). ...
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10 views

QGIS street labelling when rotating in composer

When labeling streets in a QGISmap everything's OK, no label are upside-down. But I need to rotate at 180° in the composer. Labels of lines don't flip, so they are upside-down! I tried to "show ...
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267 views

Get points along a polyline at defined distance c#

I need to store into my array the points along the polyline at each defined distance. Example: The Polyline length is 50m, I set the interval to 5m. I have to store in the array all the points along ...
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139 views

Create FeatureClass in Personal Geodatabase and store data

I have to create a new featureClass in my existing personal GeoDatabase. And save some polylines into this featureClass. How can i do it? I need c# code to do this. Edit: I have a problem during ...
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1answer
26 views

Polyline graphics not displaying in Javascript API?

I am getting features (graphics) back from an IdentifyTask, setting a symbol and adding to a graphics layer. Polygons and points show up just fine, but not lines. Has anyone else encountered this? ...
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1answer
251 views

Polyline ZM: automatic vertex height errors correction

Paolo I've got many rivers (polylines ZM) with a lot of height errors in Polylines 'vertices. Vertices' Z errors are not all equal in height (i.e. they are not all at zero height). I must create a TIN ...
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2answers
25 views

Re-numbering points along a polyline

Using ArcGIS 10.1 for Desktop. I created perpendicular lines along a polyline. In the process of doing that, the lines were numbered in order (automatically). I manually edited some of the ...
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2answers
839 views

How to cut a line feature in QGIS 2.0?

I want to shorten a feature (a polyline representing a road) in QGIS 2.0. I tried the 'cut features'-tool that look like a pair of scissors. First I chose the right layer, and then clicked 'Toggle'. ...
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215 views

How do you change starting point on a polyline? (split tool)

There must be an easy fix for this. I am using the split tool and I want it to split a polyline into equal parts. For some reason, it is starting in the middle of my polyline. How do I force it to ...
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1answer
333 views

Postgis 1.4 - Obtain closest point of point over polylines layer (without st_ClosestPoint)

I´ve got a polylines layer (pipes) and a points layer (valves) and In Postgis 1.4 I would like to obtain the closest points but exactly on the closest polyline. In other words, i need to locate each ...
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2answers
212 views

How to extend polylines to the nearest point

Hi could anyone tell me a way of getting my polylines to search for a point within a certain number of meters of their start/end points and extend to it? edit: There was some broblem uploading a ...
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2answers
58 views

Symbolising multiple lines in the same location

I would like to produce maps showing multiple lines that are in the same location. This poses the problem that the lines overlap each other making one of multiple lines visible when displayed in a ...
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0answers
35 views

Making offset to polyline using ArcGIS for Desktop?

Is there a way to make an offset to a polyline in ArcGIS? i.e. something like the command "Offset" from AutoCAD. https://www.youtube.com/watch?v=9A8CyoAMnjU I can't use the Buffer tool because I ...
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3answers
2k views

Calculating X and Y of line start and line end using ArcPy?

I have a series of polyline shapefiles and I am trying to automate the process of calculating the X and Y coordinates of the line start and line end using Python. I have added the 4 fields (startx, ...
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44 views

Is it possible to “re-buffer” river polygon dataset? [duplicate]

I've river polygon data representing the water quality. This polygon data were derived from polyline dataset according to a buffer distance in the attribute table. Unfortunately I don't have this line ...
3
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1answer
124 views

Cut polyline in Qgis 2.4

I want to shorten a feature (a polyline representing a road) in QGIS 2.4 In QGIS 2.0 there was "Split Features" tool in the "Advanced Digitizing" toolbar. Here the icon: I'm not able to do this ...
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2answers
55 views

How to link a shapefile with points to a shapefile with lines?

I have a shapefile with points (nodes) and a shapefile with lines (pipeline) which I have extracted from a water distribution network. I have been able to transform the points into the right ...
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1answer
45 views

Displaying polylines in different color / Color gradient

Though i am using QGIS, yet I am not confined by tool (can use an entirely different tool or a plugin for QGIS) usage.. Only aim is to get the following: I am reading various shapefiles in QGIS and I ...
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11 views

Pavement survey implementation

I know I am supposed to be specific...BUT I am working as part of a research team on pavement study. I need to visually display survey data in Arcmap. The surveys consist of x transverse ...
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2answers
105 views

Add custom variables to leaflet polyline

I'm drawing a route on a map with leaflet. I'd like to click on any point in the line and display the speed and time at that point in a popup ($speed[$i]). latlngs = [<?php for ...
2
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1answer
65 views

Leafletjs get latlng center position of polyline

After drawing a polyline, I would like to draw a circle from the center of this line whose radius encompasses the entire line. For polyline's that have more than 2 points I can crudely get the center ...
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1answer
34 views

ArcGIS: Locate features along routes, line vs polygon

I want to use Locate Features along Routes to locate the polylines below: The routed feature is in red and I want to locate the green lines. I have buffered these but found it only locates the item ...
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14 views

OTP encoded polyline same as Google encoded polyline?

I have been researching and trying to make sense. My question: are the encoded polylines that Google gives in its directions api same as the leg geometry encoded polylines of Open Trip Planner?
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1answer
84 views

Extracting raster values with polylines in QGIS

I have a polyline shapefile that represent a road an a raster grid with slope values. Is it possible to interpolate the shape file and the grid to have the average slope of the road? I know that I can ...
2
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1answer
30 views

Intersection between polylines feature to polygon in QGIS

I would like to transform a line shapefile into polygons. However, the tool Vector>Geometry>Line to Polygon doesn'to work to me. What I would like to do is using the intersection between lines and ...
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0answers
37 views

River flow downhill

I have polylines (rivers) with assigned elevations. I need to ensure they are flowing downstream and indicate which vertices are incorrect. I do not have 3D analyst, spatial analyst, or network ...
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0answers
46 views

QGIS field calculator expression: selecting min/max values within field groups

I am new to using QGIS (previously used Arc) and trying to get my head round the expressions and Python. I have series of polylines representing routes and require the linear distance from the ...
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1answer
26 views

Dissolving and returning values from primary lines

Im building a model and I need to dissolve line, that I marked in picture, to a line with field(NUMBER_OF_LINES) value of 2. Thsi filed represents how many lines were constructed to one line after ...
2
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1answer
47 views

After Polyline to Raster conversion empty attribute table in ArcMap10.2

I have a line feature class (displaying different types of roads) and want to convert this into a raster. For this I used the Polyline to Raster conversion tool, using "type" in the Value field in ...
2
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2answers
99 views

Convert line shapefile to raster, value=total length of lines within cell

I have a line shapefile representing a road network. I wish to rasterize this data, with the resulting values in the raster showing the total length of the lines that fall within the raster cell. The ...
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2answers
170 views

How to create a series of points along multiple polylines at once in ArcMap 10

I have a series of polylines that represent linear vegetation (shelterbelts, etc). I need to convert these to a series of points equally spaced in order to add them to a different shapefile that ...
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1answer
55 views

How to compare polylines attribute from the same GRID cell in ArcGIS 10?

I need some help because I do not know how to model this issue: I have two polyline shapefiles. They have an attribute that I need to be compared. These are roads from different sources. So, I have ...
15
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3answers
358 views

Zigzag Line Symbol in QGIS

I'm looking for a zigzag line symbol in QGIS. Is there perhaps an easy way to do this that I'm missing? I have tried creating a marker line using a simple triangle marker (^) and adjusting the size of ...
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2answers
56 views

Interpolate dxf polyline vertex elevation from DTM?

I am working on several autocad polylines (with several vertices...) that have the exact N,E coords but now I would like to add the elevation data for every polyline's vertices from a dtm. I thought ...
2
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1answer
51 views

How to find length of a discontinued line feature

I wanted to find the length of features in a road layer. So I go through each feature in the layer and used, line = feature.geometry().asPolyline() to find the points which particular feature is ...
2
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1answer
62 views

How to create the same number of points along multiple polylines?

Input: Polyline Shapefile (all lines are different lengths) and a specified number of points that will be placed on the line (will be same number of points for all lines) Desired Output: Point ...
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1answer
2k views

Converting Seismic Shot Points into polyline for linear distance for each Tract using ArcGIS for Desktop?

I have Seismic shot points (receivers and source points) that I am trying to convert from Points into a polyline for linear distance for each Tract in ArcView 10.1. What is the best way to do that? ...
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33 views

Wrong Display in Line Symbol and Gradient Color

I create a line symbol with specific gradient color and below control template: <ControlTemplate> <Path x:Name='Element' StrokeThickness='10' UseLayoutRounding='False' ...
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1answer
68 views

How to Calculate the average value near a point

I am new to ArcGIS ArcMap. I want to calculate the average value of one point ( layer flowline ). This could be done using the value of the point and the values of the four neighbor points ( raster ), ...
3
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1answer
56 views

How can I find small distance between polylines?

I`m trying to find lines which have small distance between them and I am using ArcGIS 10 for this. I had tried to make points at the both ends of the lines and to detect the distance between points ...