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.

learn more… | top users | synonyms (1)

1
vote
0answers
86 views

Edit limited to part of multi geometry collection in kml google earth

I have polylines on kml format ,I want to edit those kml polylines via google earth when I try to modify the polyline I get the error Edit limited to part of multi geometry collection.
2
votes
2answers
47 views

Sum line lengths by category

Is there any chance to calculate line lengths by category. To be precise, I have 4 road categories (state, county, local and uncategorized) and want to calculate them all within one poligone. So far,...
2
votes
1answer
47 views

Plot a point at a user input distance perpendicular to a polyline

I have a straight polyline and the distances in metres of the points I want to plot perpendicular to that line. The points are all different distances and should be measured from a different point ...
4
votes
4answers
107 views

Create an average polyline from a set of polylines

I am trying to plot the average of several polylines (up to 40). I have several shorelines of a short section of beach plotted from different dates and would like to plot their average position. Is ...
1
vote
0answers
34 views

Forcing polyline to offset from polygon border

I am currently working on a site with polygons and polylines and am looking for a way to ensure that the polyline does not overlay the site boundary. I am creating a habitat map and do not want the ...
3
votes
1answer
44 views

How do I export data points from topology checker into an attribute table?

I used topology checker in QGIS to find all dangles in my roads polyline shapefile. The topology checker returned about 528 dangling ends, also called errors. How do I save these points into an ...
1
vote
1answer
31 views

Points to polyline for ArcScene 3D?

I calculated a trail up mountain using least cost path analysis. I converted the raster trail to a polyline using the raster to polyline. I then used the feature vertices to points (input being the ...
0
votes
0answers
51 views

Measuring correct line length from a 2D polyline using 3D raster QGIS

I am trying to measure the correct line length of a 2D polyline when draped over a 3D surface. In theory I would expect the line length to change when moved from the 2D to 3D. The polyline is spaced ...
1
vote
0answers
30 views

How can I use ST_Contains/ST_Overlaps with non-simple lines?

Following the SQL of the accepted answer to How to get smallest line segments from intersection + difference of multiple overlapping lines? copied below. I'm having some difficulties assign the ids of ...
1
vote
0answers
25 views

Faulty altitude point between contours

I have point(picket?) between 2 contour lines with even number altitudes. Now i got these new 5 meters steps contour in between. As you see, this point between red lines was OK, but now that this 175 ...
0
votes
0answers
37 views

Expanding shapefile shapes

Given a coastline definition (e.g. NOAA GSHHG or OSM Coatlines), I would like to "expand" or "grow" the shape defined by a set amount, e.g. 100m. For example, given a island like this (with 8 points):...
1
vote
1answer
61 views

PostGIS help writing a ST_MakeSimple method for self intersecting lines?

I have imported Open Street Map lines into PostGIS 2.1 and I need to clean up the self intersecting ways. I have done some manual edits in the past but there are many more ST_IsSimple(way) = false ...
2
votes
1answer
43 views

Point-Line shortest distance and corresponding angle using FME

I want to determine the shortest distance and especially the corresponding angle from a point to a polyline. A solution using FME would be strongly preferred.
1
vote
1answer
36 views

Create a mapping between polyline and raster in ArcObjects

In my case I have two sources of data: a vector shapefile with a polyline (expressing the path) and a raster with some integer metadata values available for each cell. What I would like to do is to ...
4
votes
1answer
124 views

leaflet GeoJson vs polyline

Is there any real advantage in using L.GeoJson instead of Polyline when drawing paths in a map powered by Leaflet? I know that GeoJson can attach additional options. It is also possible with ...
0
votes
0answers
36 views

many points to many line segments - and retain attributes of points

I would like to take a feature class of 22571 points (with time (in seconds), lat/lon and various other attributes but for now I care most about the ON/OFF attribute) and connect those points into a ...
4
votes
1answer
141 views

Creating arrays and polylines from dictionary using ArcPy?

I have created a dictionary out of a csv values from an excel spreadsheet. I'm trying to use the keys and values in the dictionary to create arrays (one per 'Rhino') that I can use to create polylines....
1
vote
0answers
27 views

polylines between two locations over sea and not land

I have several thousand locations in a database, Location A travelling to Location B, New York to London, Paris to Buenos Aires. I'm trying to plot a path between two places only over sea. I'm not ...
2
votes
1answer
46 views

How can I split a polygon by network line in QGIS?

I have a road network as line layer and a land cover as polygon layer, I want to find number of subpolygon for each polygon that divided by line layer in QGIS? I used union function in Geoprocessing ...
2
votes
1answer
43 views

edit vertices of intersections from multiple lines

I would like to edit the vertex where two lines intersect, but doing so makes me manually move each vertex of each line. I tried to merge the lines but it did not work. Is there an easier way to ...
0
votes
0answers
61 views

Adding custom vertices to a Leftlet LineString / Polyline

I have a normal Leaflet Draw page here, when I'm not in editing mode I would like to have custom vertex icon in some of the vertices that will also respond to click events, showing a popup. I looked ...
2
votes
0answers
41 views

Roadnetwork_merging [closed]

I have a shapefile of a road network which has two lines to represent the two-way directions. My attribute consists of "fromnode", "Tonode", "length", "One-way" (every cell has a value of one here, ...
4
votes
2answers
86 views

Modelling per-segment attributes in GML LineString

This is not a software-specific question, but rather a question about how to represent some concepts in a GML LineString. It has to be GML, for policy reasons. Consider a GML LineString consisting ...
0
votes
0answers
41 views

Network Analyst line barriers have no network location?

I am using ArcGIS Network Analyst to calculate a route between two points on a road network. I have added a number of scaled cost line barriers but no matter how I mess with the settings, solving for ...
-1
votes
1answer
75 views

How to know the start and end node of a line in arcgis [duplicate]

I have a shapefile lines that represent the streets of my city. I need to know the start and end node of each line. Then, i need to write this information (start and end of nodes) in the shapefile ...
2
votes
2answers
77 views

ArcGIS - Locate features along routes returning double results?

I am using locate features long routes using a points layer and a routed polyline network. Each point has a unique ID. My end goal is to determine is a point is to the left or right of the line. ...
0
votes
1answer
69 views

Cut a linear feature according to the directions or azimuths

I have a shapefile linear that contains a single items as in the image and I want to divide it into several section respecting the azimuth and the line direction. i have this code : import os ...
0
votes
0answers
73 views

Create matrix measuring distance from each point to every other point along polylines

I'm working on a project involving ancient trade routes. I have two datasets: 1) -Nodes (around 1000): Every node has a nodeID, lon, and lat 2) -Arcs (several hundred): contains a record for each ...
1
vote
0answers
38 views

UTFGrid and line features: UTFGrid not consistently triggering mouse events for line features

[Update: My first solution works (notes below), but I'm still interested in responses to the second solution I suggested.] Original Post: Has anyone experienced and resolved difficulties with ...
1
vote
0answers
88 views

How to convert an XML to Shapefile polyline

I want convert this XML file to a polyline shapefile. <?xml version="1.0" encoding="utf-8" standalone="yes"?> <ci nc="BMSKDMA10" nl="BMskDMA10" mt="6" ct="DM" dtt="17342" dtu="15/01/2016 09:...
1
vote
1answer
99 views

Color gradients to show direction in polylines

I am referring to this very useful hack to change the color gradient of buffered polygons in order to show direction (with a gradient from red to green, for example) hack The only problem is that ...
0
votes
1answer
81 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 ...
0
votes
1answer
58 views

Select by Location using first points of polyline

I am trying to select a point from a point layer that intersect a polyline layers firstpoint and using arcpy. I am getting an error "ExecuteError: ERROR 000622: Failed to execute (Select Layer By ...
1
vote
0answers
41 views

how to extract line features from a raster

I have a raster of land cover types where roads are represented by pixels (1 pixel = 25m x 25m = 625 m²). Is there a way to extract line features (here roads) from a raster ? ## Create raster as an ...
3
votes
1answer
89 views

Getting point from known points to specific distance of polyline using ArcObjects?

I want to know the coordinates of a polyline from specific point and distance. I have attached image to clear the specification. say, I have a points B(2,3). I want to know the coordinates of A and C ...
1
vote
1answer
60 views

updating Z coordinates of points in polylines

I have a polyline feature dataset with Z coordinates. I'd like to change the Z values (e.g.) by adding 10 meters. I am trying the following code, but no changes happen. It seems the code is able to ...
4
votes
1answer
120 views

Find out if overlaying polyline matches polygon centerline in qgis

I have a polygon and a polyline and I need to find a scientific way of how close that polyline is to the actual polygon centerline. Is there any way of doing this in qgis? Any extensions, models, ...
1
vote
2answers
141 views

How to combine two polyline shapefile together

Here is my question Two shapefile: * A: represent the outer boundary of the city area * B: represent the inner boundaries of the city divisions. I want to * Combine these two shapefile * ...
1
vote
1answer
61 views

Decompose the polygon with polyline inside

Here is my question: I have a polygon shapefile represent the whole country area. A polyline shapefile(with a bunch of line boundaries) represent the province boundaries So, how to decompose the ...
1
vote
1answer
49 views

Arguments error when running LineDensity scripts in arcpy

I'm trying to use LineDensity tool on polyline features. The shapefile is small and includes some invalid geometries. The code I use is an adaptation of an ArcGIS Help script. Here is my code: ...
2
votes
0answers
120 views

Intersect, Spatial Join?: One Line crossing Multiple Polygons, assigned wrong attribute

I am looking for any possible solutions to a problem I am encountering with ArcGIS. I am using census block groups (CBG) to assign streets an income level value based on their location within the ...
1
vote
0answers
57 views

Arrows with direction and proportional to attribute

my data looks like this: > main end.station start.staion Freq end.latitude end.longitude end.station 1 359 519 929 40.75510 -73.97499 E 47 St &\nPark Av 2 ...
0
votes
0answers
25 views

Create polyline at latitude line

I would like to create a polyline shapefile that runs along a line of latitude between two points of longitude. I have been able to create a line by creating a new shapefile, then editing the vertices ...
1
vote
0answers
108 views

Showing marker upfront in OpenLayers 3 while drawing polyline?

I am drawing the polylines on the map and displaying few marker as well which is working fine but when the polyline is drawn marker is above the line I wanted to know how to show the marker upfront ...
2
votes
1answer
172 views

Selecting features of vector layers based on another vector layer using QGIS?

I am using QGIS 2.12.2. I am using three vector layers (point, polyline and polygon shapefiles) of the region of interest. Any advice in making the selections from one dataset based on the other ...
0
votes
0answers
100 views

Extend line to specific distance or a line

I want to extend my polyline to a given distance. How can I do this. I have attached image to clear my specification. I am using .net in ArcMap . I am also using python in the image, I want to ...
2
votes
2answers
112 views

How to calculate the intersection within the grid and saving to the grid

Here is my example: (1) I creat the grid line layer using MMQGIS plugin (2) I use line intersection function to get the intersection points. I want to calculate the distance sum within each ...
0
votes
0answers
126 views

using OSRM Routing in Openlayers 3 to draw polyines on the map along the direction of the map

I'd like to implement routing on my map using OSRM and Openlayers 3 but there don't seem to be any examples or tutorials anywhere.All the sample are to confusing Sources refereed 1:http://workshop....
2
votes
1answer
77 views

Using Python to convert line shapefile to raster, value=total length of lines within cell

I have already read the similar question Convert line shapefile to raster, value=total length of lines within cell using R. And I want to realize the function using Python. ===== My attempt ==== ...
1
vote
1answer
41 views

Get lat, long from QGIS polyline shapefile [duplicate]

I develop in C#. I want to develop a tool which needs to read the poly line coordinates. QGis is a very good tool that my users can use to generate a polyline .shp file. But how will I be able to ...