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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2
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1answer
186 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 ...
0
votes
1answer
170 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 ...
2
votes
0answers
30 views

Arcpy module to read csv files and create polyline shapefiles

I am creating a module in arcpy that will loop through a folder with csv files in it. I have both of them written, and they work fine on my computer. However when I send them to anyone else they won't ...
1
vote
0answers
13 views

Why does connected polyline (KML file) appear unconnect in arcmap as layer?

I created polygone in google earth and imported it to arcmap as layer. All things are OK but when I converted polygon to polyline, there some parts of polyline has not shown although its vertices ...
1
vote
0answers
14 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.
3
votes
1answer
198 views

How to offset polyline geometries (not symbology) using QGIS?

I have a polyline layer which has a road network digitized, up the center, in both directions however the polyline are sat "one on top of the other". I can display the lines separately by ...
2
votes
1answer
523 views

How to obtain closest point of point over polylines layer in PostGIS 1.4 (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 ...
1
vote
2answers
469 views

Split polyline where it intersects with other lines in MapInfo

I have a polyline (bus route) which I want to split where it intersects with other lines (not polylines) I have created. I'm happy to initially do it manually to see how it works, although I would ...
4
votes
4answers
84 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 ...
2
votes
2answers
42 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 ...
2
votes
1answer
40 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 ...
2
votes
1answer
208 views

Segment matching on a polyline

I have about 1000+ running routes which I can load into memory as polylines using latitude and longitude data captured from a running watch. From these polylines I would like to be able to identify ...
1
vote
1answer
185 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? ...
3
votes
1answer
504 views

Converting contour lines to terrain dataset?

I have downloaded free DEM from the NET and I generated a contour line with 10 meter for interval. So, I just want to convert the contour lines to LAS point file to create a new terrain dataset. Is ...
1
vote
0answers
30 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
268 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). ...
3
votes
1answer
34 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
21 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
31 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
2answers
388 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 ...
2
votes
1answer
179 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 ...
2
votes
1answer
367 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 ...
1
vote
0answers
19 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
2answers
570 views

Turning Polyline with Multiple Segments into One Single Line

Using QGIS Valmiera (MapInfo and other software is also available) Is there a way to convert a polyline with multiple segments into a single line? I.e. by taking the first point and the last point of ...
1
vote
0answers
24 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
15 views

How to symbolize 3D polylines segements?

Using ArcGIS, I created 3D polylines by extending the sample code here: ESRI Sample Code import arcpy # A list of features and coordinate pairs feature_info = [[[1, 2, 5], [2, 4,10], [3, 7,25]], ...
2
votes
2answers
381 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 ...
1
vote
1answer
51 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 ...
0
votes
0answers
34 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 ...
2
votes
1answer
27 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.
0
votes
1answer
216 views

How to copy closed loop lines into polygon feature class

I'm trying to utilize line contour data to find the volumes of local depressions. To do this, I want to copy the closed loops formed by depression contours into a polygon feature class to find the ...
2
votes
1answer
67 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 ==== ...
4
votes
1answer
46 views

Overlapping line aggregation+trim in PostGIS, while summing values

I'm sorry for the vague title, I didn't really know how to name this. I am working on a project that visualizes and simulates 17th century trade. For this project we also use so called Minard lines to ...
4
votes
2answers
70 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 ...
1
vote
1answer
33 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
61 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 ...
4
votes
1answer
102 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 ...
0
votes
0answers
28 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 ...
1
vote
1answer
78 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 ...
1
vote
0answers
24 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 ...
5
votes
5answers
1k 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 ...
7
votes
3answers
6k views

Extract Raster from Raster using Polygon shapefile in R

I am new to R and using the raster package. I have a problem extracting polygons from an existing raster file. If I use extract(raster, poly_shape) function on the raster it always creates a list ...
4
votes
1answer
82 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
89 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 * ...
2
votes
1answer
36 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 ...
0
votes
0answers
30 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
1answer
36 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 ...
2
votes
0answers
40 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, ...
0
votes
0answers
34 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
51 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 ...