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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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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1answer
30 views

Assigning common field value to segments between two points using ArcGIS for Desktop?

I am using ArcGIS 10.3 for Desktop. I have a shapefile with polylines connecting points. Instead of having one single polyline connecting two points, there exist a number of consecutive segments ...
3
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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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2answers
44 views

ArcGIS 10.3: How to merge lines divided by junction points?

I have one shapefile with train stations (points) from a region in the UK and another shapefile with railroad tracks (lines) between these stations. Problem is, in the latter I don't have a unique ...
3
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2answers
121 views

Fixed distance between two contours - Qgis 2.14.1

There is a possibility, when you select a contour line and give a fixed length of line, this line connects automatically to the next contour lines? I have two other questions on this subject but I do ...
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19 views

Draw a line between 2 sets of coodinates [duplicate]

Basically, I have a table of river cross sections coordinates in excel . I have x,y data for one side of the bank and another X,Y coordinate for the opposite bank. In excel I have 5 headings, the ...
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24 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 ...
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2answers
50 views

Decode encoded polylines to usable format for QGIS

Beginner alert. I was given a set of encoded polylines that I need to import into a QGIS project. I understand what encoded polylines are but now I am stuck with how to decode them into some usable ...
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29 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 ...
3
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21 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 probleme is it put me a point at every segments.. If i ...
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1answer
28 views

How to split multiple lines of the same feature using a line?

So obviously there is a split tool to split a single selected line. In my instance I would like to split 2+ lines of the same feature using a tool that is similar to the split tool. In this image I ...
3
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1answer
49 views

GIST slows down query?

I have an odd case where creating a GIST index slows down my query instead of speeding it up. The setup consists of two tables, one with multi-polygons, another with points. I want to calculate which ...
2
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1answer
61 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 ...
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0answers
16 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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33 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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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 ...
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1answer
45 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 ...
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4answers
88 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 ...
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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
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1answer
37 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 ...
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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 ...
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36 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 ...
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22 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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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 ...
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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]], ...
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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 ...
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1answer
58 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
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1answer
30 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.
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1answer
34 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
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1answer
74 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 ...
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0answers
31 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
110 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 ...
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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 ...
2
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1answer
38 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
37 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 ...
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0answers
40 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
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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, ...
4
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2answers
72 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 ...
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39 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 ...
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1answer
56 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
66 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. ...
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1answer
62 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 ...
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58 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 ...
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32 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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0answers
80 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 ...
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1answer
82 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 ...
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1answer
65 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 ...
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1answer
53 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 ...
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39 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 ...
2
votes
1answer
65 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 ...