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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29 views

How to project 2D (poly)lines and polygons on a point cloud or a (tri)mesh (TIN)?

I'm searching a way to project 2D (break)lines and polygons (they are in an ESRI shapefile but I can translate them to something different if needed, like geojson for example) on a point cloud (seems ...
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1answer
214 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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10 views

Create and save profiles of lines automatical in QGis or Arcmap [on hold]

I have one polyline vector with 700 polylines and one raster file. I would like to make the profile of all polylines automatically and save it as csv or xls file. Associated with one polyline I have ...
3
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2answers
550 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 ...
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1answer
402 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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28 views

Representing multiple polylines in unique vector layer?

I have imported a layer which contains a lot of lines. They overlap each other in a cross kind of pattern. When zoomed out it can look like this: When zooming in on one of the broader lines it ...
2
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1answer
260 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 ...
2
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1answer
38 views

Recording height profile from raster along a polyline shapefile?

I'm looking for the easiest way to record a series of raster values along a 400 meter transect in ArcGIS 10.3.1. I'm working with a LiDAR canopy height model with 3mx3m cells where each cell ...
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2answers
425 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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49 views

polygon/polyline digitizing techniques for geological data

My current work involves extensive digitising of historic geology data - essentially the creation of new polygons and polylines based on overlain raster and vector layers. This is all done manually ...
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1answer
27k views

Calculating elevation profile for a polyline in ArcGIS 10?

My elevation data is a floating point tif. I have a road for which I need to calculate the elevation profile, but I can't see the tools to do this. Can I do this with ArcGIS, with spatial analyst/3D ...
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2answers
30 views

Create transect lines of specific length through points

I've got a series of 30 random points in ArcGIS 10.3.1. I'm hoping to generate 200 meter lines of a specific orientation (i.e. north-south) through each point so that I can sample continuous raster ...
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2answers
41 views

ArcMap: Extend lines to Points without altering original geometry

Is there an efficient way to extend lines to points in ArcMap? I have a utilities dataset, where I do not want to change the original geometry, but instead add to it in order for end vertices of ...
3
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1answer
299 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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3answers
51 views

Split multiple polylines by distance in ArcGIS

Is there a method to split thousands of polylines by employing a tool like the "Editor" - "Split" method and using distance, in ArcGIS? When I utilize the "split" - "distance" tool (fig1), it ...
2
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1answer
216 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 ...
2
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1answer
17 views

Comparing multiple polyline shapefiles to single key file

I am working on a project where we are comparing participants' spatial memories. We take them through a circuit, then later in the lab they draw the route they traveled. I want to be able to compare ...
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1answer
224 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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18 views

Segment polyline at distance from points

I have polylines with many vertices (i.e., a river). For analytical purposes, I want to segment this line at specific distances from points that occur along these polylines. Normally with straight ...
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1answer
31 views

Convert encoded polylines into geojson and kml files?

There are plenty of resources available online to help users encode polylines. I am looking for something that does the opposite but my extensive research yields minimal results. I have a massive set ...
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1answer
19 views

Plotting on MAPinfo given edge geometry in a row

I have a file of road geometry of the Washington State downloaded from GIS cup 2012. Each row in the file is of the type, 5,service,15.9316766209136,47.2981713,-122.2481928,47.2981800,-122.2482596,47....
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1answer
32 views

How to convert multipoint layer to polyline layer in QGis

How can I convert a multipoint layer to polylines layer in QGis. I am looking for a tool equal as the GeoWizards (convert > Multipoint to polyline) for ArcGis.
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2answers
464 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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2answers
618 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 ...
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1answer
43 views

Convert SpatialPolygonsDF boundaries to SpatialLinesDF keeping information on polygons

I have a SpatialPolygonsDataFrame and I need to convert polygon boundaries into a SpatialLinesDataFrame retaining the attributes of the 2 polygons The structure of the SPDF looks like this 'data....
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1answer
30 views

Joining attributes of two line feature classes (street network, ArcGIS)

I have two line feature classes for a street network. Their geometries are only crudely similar, while their attributes are different. I am trying to add the attributes of one feature class to the ...
3
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1answer
243 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 "offsetting"...
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16 views

Calculating complexity among data

I have a set of polylines represented on a map along a certain axis line. Most of the polylines are close to each other along this line, but they all have a certain angle of orientation. Considering ...
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1answer
32 views

Measure polyline length in QGIS

I try to measure the length (in meters) of the polyline layer that pass inside the olive polygon layer only, and if it possible export the wanted polyline into new layer: the attribute table of the ...
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0answers
34 views

Measuring length of curved lines for district

I work in a country which is divided in election destricts(polygon shp). I have the roads of the country as a vector layer (vector shp). I want to find a tool for QGIS like sum line lengths of qgis (...
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2answers
163 views

get lat/lon values of every start and end point of polyline

I have a polyline shapefile with 166 different line features. How would one populate the attribute table with x and y values of the start and end points of each line?
4
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1answer
100 views

Join / merge lines that touch and intersect in QGIS

I have a large dataset consisting of lines/polylines where I would like to join/merge the lines that touch / intersect. Each line has an individual ID and there are no common attributes I can use for ...
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1answer
39 views

How do I know which way line features are oriented?

I'm working on QGIS on a street shp file which has Left From, Left To, Right From, Right To fields fields, building a geocoder. I need to know which way these features are oriented, which I think is ...
2
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1answer
40 views

How to make a polyline with two-sided arrows show two colors

I am very new to ArcGis development and so bear with me if I asked a silly question. I am using ArcGis 10.2 on C#. I have two features (A and B) on the map. I need to place two arrowed lines - one ...
3
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1answer
45 views

Snapping end lines ArcGIS 10.4

I am trying to snap 2 polylines features as the picture below : I would like to snap both end lines using tolerance distance ans only snap the nearest feature: from the red feature, choose the ...
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0answers
31 views

Combining line vector shapefiles with different attributes

I'm using ArcGIS 10.3 for desktop. I have two shapefiles, both with polyline vector data for roads in the same area. This area is quite large, approximately 7,500 km², so there are a lot of roads in ...
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1answer
67 views

Counting nodes/vertices in large polyline GeoJSON?

I have a large .geojson file (~ 1 GB) of made up of thousands of polylines. My objective is to count the number of vertices (not end points) in the entire file. Is there a python module that is ...
2
votes
1answer
43 views

Mapping raster values to nearest grid cell on a polyline

I'm not sure if the following task is possible in ArcGIS, or whether I need to use something like MatLab - I wondered whether the community could possibly advise if it is possible, and if so, what ...
2
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1answer
197 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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2answers
22 views

Create polygons from points

I have a points dataset, which contains what are essentially vertices of polygons. They represent a number of separate, discrete polygons, and there is a field delineating these by name. Using this ...
2
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0answers
36 views

How to count near intersecting polylines and merge them?

I have a dataset with several polylines created by GPS points of car trips. I am trying to create a simple heatmap where roads with more traffic (where polylines intersect) get darker. I already ...
3
votes
1answer
513 views

How to check if geometry is M aware?

I am trying to determine whether my shape file that I pass is in M-aware (has M value). I keep getting an error Attribute Error: 'Polyline' object has no attribute 'hasM' Not sure what I am doing ...
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1answer
20 views

Reordering vertices on a polyline (route)

I have a route in which the second vertex is in the middle of the line. Route is about 130 miles long. This is preventing me from recalibrating. Is there any tool that will re order or sort all the ...
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1answer
94 views

create heatmap from coordinates [duplicate]

computer science student here, haven't done much in GIS, just trying to finish a project for a class. What I have is a CSV of origin/destination points as co-ordinates (longitude and latitude) what ...
0
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1answer
25 views

Not all polygons digitize when converted from lines

I have a polyline feature consisting of a grid. I attempted to convert this grid into a polygon using the "Feature to Polygon" geoprocessing tool, and it appears that not all lines have been carried ...
2
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0answers
52 views

QGIS break polyline into line segments

In QGIS (2.14.3.) how do I break polyline features in their consisting (single)line features? I have tried the 'Explode lines' geoprocessing tool, but this destroys the whole polyline into very atomic ...
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9 views

Find all states (polygons) through which a route (polyline) passes

Used GADM to find GeoJSON polygons for the states of India. Now, given a google route between two cities, I need to find all the states the route passes through. Any suggestions on how to proceed? ...
5
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2answers
160 views

How to efficiently convert origin-destination coordinates into lines in R

Reproducible example to show what I mean: # Create origins and destinations odf = data.frame(fx = 1:5, fy = 1:5, tx = 0:4, ty = rep(1, 5)) The challenge is to convert this into straight lines ...
3
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0answers
30 views

Loop distance point pyQgis

I have a .shp of lines where I'm able to calculate the sum of segments length but I'm trying to put a point at a given distance in meters. The problem is it puts a point at every segment. When I give ...
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3answers
96 views

Determining curvature of polylines

I'm dealing with several thousand polylines of Geologic data with mixed degrees of curvature. I'm attempting to quantify just "how curved" these lines are and was curious if there was a means to do ...