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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100 views

How to get polyline latitude and longitude by click on polyline android?

I have set Polyline click listener like this : map.setOnPolylineClickListener(new GoogleMap.OnPolylineClickListener() { public void onPolylineClick(Polyline polyline) { int ...
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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 ...
3
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126 views

Merge line segments by length (in QGIS)

I have a layer containing line segments which are connected by their endpoints (e.g. as within a street network). I'd like to merge (union) polylines within this layer into one feature until following ...
3
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134 views

Quantifying polyline overlap

I have a set of regions and would like to quantify the degree to which the boundary of these regions are situated on/near rivers. I have turned the regions from polygons to polylines in arcgis 10.1 ...
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55 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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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 ...
2
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55 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 ...
2
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121 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 ...
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53 views

Split Polyline QGIS - Too Many Resultant Features

I'm trying to split a single polyline into 2 polylines (I have lines that loop back on themselves, and I need to split each one into two lines: one for going, and one for coming back). When I use ...
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66 views

Equal distance points on polylines

In QGIS 2.10.1 I want to create a point layer out of my polyline shapefile and all the points shall have a fixed distance (in meters) while I use WGS84 as coordinate system. So what do I use for this? ...
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49 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 (...
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129 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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875 views

Find Average Elevation - ArcGIS Desktop

I am working with 2 shapefiles. One contains the boundaries of a city, the other contains polylines representing the topographic features of the area. Essentially, the polylines make a topographic map....
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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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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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49 views

Algorithm to simplify a Polygon/Series of Points to a given number of Points

I have a polygon (or let's call it just a series of points). I want to simplify it (reduce the amount of points) to a given number of points. Currently I use Douglas Peucker and try to guess the ...
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20 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 ...
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87 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.
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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 ...
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31 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 ...
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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 ...
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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 ...
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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 ...
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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:...
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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 ...
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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 ...
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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 ...
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117 views

Divide polyline shapefile using R

I am very new to GIS in R. I have a question that may seem simple but so far I have had no luck. I am trying to split every line in a polyline shapefile into segments of three. My original file has ...
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40 views

How to stop QGIS auto snapping new poly lines as they are being created?

Im creating a polyline based data set which involves digistising around a large amount of street outlines. Is there a way to stop QGIS from auto snapping the new polyline section to a straight ahead ...
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168 views

How to find one polyline of google map overlaps other polyline in map?

I have two routes let's say route 1(Location A to F) and route 2(Location B to E) in Google map. How could i determine route 1 includes route 2? Here route 2 is shorter than route 1 so, coordinates ...
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161 views

QGIS - Polygon to Lines Tool Incredibly Slow

I am trying to convert a few polygons to polylines so I can save them as a .GPX file. I'm using QGIS 2.8.1 (Wein) on the Mac. It seems to be hanging. I only have a few small polygons (see screenshot)...
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29 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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47 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
49 views

Splitting multiple noncontiguous polylines into multiple files

I have multiple polyline shapefiles that are non-contiguous, that is to say that each shapefile contains polylines that have breaks in them. I am looking to split each of these polyline segments into ...
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0answers
65 views

ArcGIS ArcMap average values in a single flowline

I am newbie in Arcmap. I need to get the average (Velocity) values of 1000 points on my long flowline. I tried to make parallel lines on each gridpoint using the "copy Parallel" function. But there ...
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0answers
111 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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0answers
39 views

Is there a way of splitting roads at intersections with contours in QGIS?

I'm a beginner with QGIS. I need to split a polylines showing public roads at each intersection with a table containing elevation data (contours) which is also in polyline format. I will also need ...
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0answers
308 views

GPS data cleaning - Sampling of track data

I have gotten a fairly large polyline-dataset of GPS-recorded tracks. I'd like to have a sample along the tracks for different variables. The problem is that the data has overlapping tracks. This ...
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0answers
94 views

Trouble intersecting a polyline and contours (Hack index / stream length gradient index)

Working on creating polylines for measurement using SL index (hack index). So far I have the main trunk of a stream, and contours at 10m. What I am trying to do is a) get the elevation at each ...
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128 views

Split 3D line feature at vertices based on slope change

I've already asked a question about this subject, but now I think I'm almost getting to the point. I have to split roads in ramps to calculate LS factor (RUSLE - soil erosion) These are the steps ...
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148 views

3D Polyline by Slope on Surface

I wish to project (continue/extend/whatever) a polyline upslope following a specified gradient along a DEM surface. Is there any way of doing this?
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14 views

Aligning Raster to polyline - Geological Fault

I have two rasters representing geological layer boundaries that are seperated by a polyline representing a fault. There is a significant offset between those two rasters. Now, at the fault, of course,...
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0answers
31 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 ...
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0answers
31 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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0answers
20 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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0answers
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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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? ...
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24 views

Adjusting labels in for stationing

How do I update labels for stationing? I am using the "Station Lines" plug in which is great, but I need the labels to read 01+00, 02+00.... as opposed to 1,2..... Also, can I start this labeling ...
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0answers
94 views

Polylines and polygons - QGIS-2.14.3-1

After extracting contour lines from a DEM (obtaining polylines), and transforming them to polygons, I export the vector layer with polygons to a DXF. Then I import the DXF into Corel Draw to manage ...
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33 views

Polyline turned upside down and sideway (from encoded polyline to geojson to shapefile)

I was given an encoded polyline that I decoded and exported into a geojson file using the fabulous tool here: http://barryrowlingson.github.io/polyline-to-geojson/ but now I am running into another ...