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Questions tagged [polyline-creation]

Used for questions about making polyline features

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1answer
993 views

Drawing perpendicular line between point and line layer using ArcMap?

I have downspout points that are currently emptying at the foundation. We need to redirect those into the roadway to be collected by the storm sewer. However we need to check that there is enough ...
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0answers
155 views

QGIS Start and endpoint marker line and polyline

I have a DWG file with lines and polylines. I would like to know how to make a point at each side of the line. Like a startpoint and a endpoint. I do not want any points in the middle just start and ...
1
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2answers
625 views

How to convert multipoint attribute to polyline in QGIS?

I have a multipoint layer in QGIS with 860 points. Each points has some attributes value from a join, and I need to use one of those attributes (a column) to draw polylines. I need one polylines for ...
0
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1answer
384 views

Create polyline using MapBasic (unknown number of nodes)

I'm trying to create pline using MapBasic. My idea was to create simple tool with dialog box containing couple of EditBox, PopupMenu's to retrieve pline attributes from user. So far I have only making ...
2
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1answer
346 views

Converting lines to polylines with PostGIS/QGIS?

I have a PostGIS table containing linestrings. Some of these are parts of larger logical constructs (tracks, roads or boundaries). I have been going though the data using snapping tools to make sure ...
7
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2answers
1k views

Converting polygon to lines without duplicate edges?

This seems like it should be easy, but I'm not figuring it out: How do I convert a polygon layer into a line layer representing the polygon edges, where each edge belongs only to a single feature (or ...
0
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1answer
130 views

Routing - How to deal with polyline with fork?

I currently work on a routing system for kayak tours. In ArcGIS I have a polyline shapefile with each polyline representing a route with a description. The problem I experience is with routes that ...
2
votes
2answers
276 views

Merging two linestrings gives Geometry type error in MMQGIS?

I am trying to merge two linestrings/Lines/Polylines (not sure actually how I can see the difference whether my layer is a Linestring/Line or Polyline and googling didn't really brought clarification)....
4
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1answer
489 views

Erase tool for polylines with ArcGIS Standard License

I have a very long polyline representing a pipeline. I also have another feature class with smaller polylines which are coincident with the pipeline. I am trying to cut the pipeline with the smaller ...
1
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2answers
187 views

Replace Polyline Geometry on Zero-Length Polyline

I have an app that occasionally generates zero length polylines with identical start and end vertices. I need to modify the geometry for these features so that the end vertex is slightly different ...
0
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2answers
965 views

Define pen width of a Line layer in PyQGIS

I have created a line shapefile layer (memory layer) created in Python Console of QGIS. Now I want to define the thickness of the line features that are being created. I am aware of the method by ...
0
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1answer
247 views

Create single KML from multiple encoded polylines

I have a number of encoded polylines stored in separate database records. I can successfully retrieve each one, decode it and create a single KML file. However, I need to create a KML file that ...
0
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1answer
6k views

Remove the last plotted line from Google Map _ Android?

I created a class that select latitudes and longitude from sqlite then mark on map then draw polyLine. Problem : Every time I select my records 100 to 100, when I saw first 100 then I clear map then ...
0
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1answer
394 views

ESRI ArcGIS error: Zero length polylines not allowed [closed]

While writing a simple ICommand in ArcMap 10.2.1 using C# that lets you select two different point features on the map and it creates a feature in a polyline feature class with those two points as its ...
1
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1answer
134 views

Raster to polyline with only one feature for each unique value

When I convert my raster layer to a polyline layer, the cells that are located very close to each other (even with different values) are connected to each other which is unwanted and very hard to get ...
3
votes
2answers
3k views

What is the difference between Polygon To Line and Feature To Line in ArcGIS?

What is the difference between Polygon To Line and Feature To Line in ArcGIS? Is feature to line a more abstract way such that it takes in not only polygon but like dots and other feature classes also?...
-1
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1answer
2k views

Plotting points into segments on roads exactly with ArcMap?

I have a set of data (see the table below) which has an origin lat and long and destination lat and long with speed. I just want to plot lines between the origin and destination, and color code them ...
4
votes
3answers
355 views

How can I be sure that line segments are joined at the same node?

I have received a single ArcGIS feature class which contains polyline segments. The segments appear to be joined together at their endpoints, but upon closer inspection they are not perfectly docked ...
0
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3answers
592 views

Add nodes to polyline at set intervals

I have a shapefile polyline which I would like to add nodes to at set intervals along its length. Is this possible in ArcGIS 10.2 and how would I go about it?
1
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1answer
687 views

Creating lines that connect the centroids of adjacent polygons to one another

I have about 10 polygons, and I have added their centroids to the map. I want to create lines connecting the centroids of each adjacent polygon. If polygon 1 borders polygon 2 and 3, I would like a ...
1
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1answer
1k views

How do I draw North-South, East-West, Northeast-Southwest, and Northwest-Southeast lines?

Is there a way to draw four line segments through a point that extend in 8 directions based on my coordinate system?
0
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2answers
1k views

Convert x y coordinates to polyline shapefile

I am trying to process output from a model that simulates the movement of particles in groundwater. The program outputs the particle ID number, the x and y coordinates, and the time at which the ...
1
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0answers
365 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)...
3
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3answers
2k views

How to convert points to lines?

I want to convert these points to lines, however they are not sorted sequentially along a line (by ID or FID), i.e. the converted lines zig-zag across the obvious trail of points. How can I join ...
0
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2answers
1k views

Drawing BTS sectors in GSM?

I'm very new to Mapbasic. I tried to make a short code to draw some BTS in GSM but I can't do thant (over 1 month). I have a table with these column: Sitename, Lon, Lat, Azi, Beam, Dist. Can ...
1
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1answer
447 views

Incorrect vectorization from a raster in ArcGis (ArcScan)

I am trying to make a vectorization to get lines from a raster image using arcscan. I saw some users making it but using easier images with more visible lines but is not working with my image. could ...
1
vote
1answer
463 views

Removing disconnected cells in a stream network raster using ArcGIS

I've got a predicted stream network raster with cells values 0 (not a stream) and 1 (is a stream). My end goal is to create a network of connected polylines, but unfortunately there are some areas ...
3
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0answers
2k views

Is there simple way to calculate radius of curvature along polyline?

I am digitizing a sinuous linear alignment (in this case a water pipe) and would like to get the radius of curvature of the various bends along the alignment. The main reason is that the minimum ...
0
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1answer
76 views

Failing to get WKT to reference for a multi-line

I have a shape that I've exported to CSV and GeoJSON to be loaded into CartoDB. Unfortunately, the GeoJSON doesn't work so I am trying to upload the CSV but don't quite understand how to get the array ...
1
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1answer
2k views

Creating polyline which is average of multiple other polylines?

I am trying to use ArcGIS for Desktop to create an "average" polyline from several lines. For example if you have multiple hurricane paths and would like to plot the average position of all of the ...
0
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1answer
110 views

Georeferencing system of rivers using XY To Line tool? [duplicate]

I have a State Water Hydro layer from our GIS county office that does not have georeferenced attributes (It is sitting on top of a State Plane county basemap). Looking at the XY to Line tool I need ...
3
votes
2answers
5k views

Creating new lines along specifically selected existing lines using QGIS?

I have tried to find a solution for this everywhere, with no result... My problem is that I want to be able to manually draw a line that automatically snaps to a line (creating an exact copy of the ...
-1
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1answer
1k views

How to create coastline in ArcGIS 10.2

I want to generate the shortest distance to coastlines from interested points worldwide. My question is given existing world map polygon file, what the standard way to create coastlines is.
3
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0answers
150 views

Creating polyline templates (polyline vs polyline ZM) for future network dataset?

I am about to request large amounts of polylines from a variety of sources (municipalities). The idea is to collect bike path data and build a regional bike network (I work for the region ...
6
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1answer
3k views

Creating polygon from exterior points using PostGIS?

How to convert points data to polygon, so as to form polygon from exterior point as shown above
2
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1answer
316 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 ...
0
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1answer
74 views

Trouble creating a line in ArcGIS

I'm not able to create a line in ArcGIS. I started an edit session and began with straight segment. All I want to do is draw a line out of three single points - lets say the coordinates for the points ...
1
vote
1answer
171 views

How to measure and mark a line or point as a template QGIS?

I'm digitizing some of our sewer assets and need to be able to measure distance and create points. So, for instance, I have a sewer main that is 65m long. I need to mark a point at the 32m mark, then ...
1
vote
1answer
2k views

ArcGIS 10.2 Extract Polyline from Start/End Coordinates

I have two files. A polyline shapefile of highways and a spreadsheet that contains beginning and ending coordinates with descriptions of segments of the highways. For example: BegX, BegY, EndX, EndY, ...
2
votes
4answers
2k views

How to take 2 points from One featureClass, create a line between those points, and add the line to a new featureClass (aka Shape File)?

I'm a total noob/beginner in ArcObjects. I'm coding in C#. I want to extract 2 points from a given featureClass, create a straight line between those 2 points, create a new feature class and add ...
3
votes
3answers
8k views

Google Maps: Decoded polylines showing up incorrectly

I'm trying to draw an encoded polyline via the Google Maps API (v3), and it seems to draw 'sort of' correctly (as in, roughly in the right area of the world ;) ) but otherwise is very, very wrong. (...
2
votes
2answers
1k views

How to create links between points and nearest vertex of polyline feature class?

I have a point feature class and for each point I want to find the nearest vertex on a polyline feature class. I then want to create a line between each point and it's nearest vertex on the other ...
1
vote
1answer
3k views

How to get polyline features from a raster file using ArcGIS 10.1?

I have a watershed accumulation file look like this: There are several white lines by visual, and I tried the raster to polyline tool and got this: Are there better ways to extract polyline features ...
4
votes
2answers
744 views

Freehand line tracing in QGIS? [closed]

I have read several tutorials and questions here on this site, but I have some lingering questions/doubts that I would like clarified. My project is tracing roadways from a 1926 map so that I can ...
0
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1answer
104 views

Line style width property not being applied in QGIS 2.0.1

I change the line width of my style and click apply, but the property does not seem to be applying to my line data.
5
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2answers
1k views

minimum distance from the shore (how to retrieve the “shore vertices”)

I am student of Statistics, this is my first time using GIS., I am sorry for the stupidity of the question but I browsed online and could not find a satisfactory answer. I have some spatial data in ...
-1
votes
1answer
220 views

How to create a polyline feature from a point layer

I would like to create a route line based on a point layer. The existing tool does not meet the customer requirement. But using the code snippet below, the start point and end point are always the ...
3
votes
1answer
461 views

How to represent Typhoon(s) wind speed using Quantum GIS / PostGIS?

I am not completly new to GIS (was taught ArcGIS at Uni) but I would still consider myself (especially compared to all these experts here) a newbie in QGIS or PostGIS. I want to display the ...
20
votes
6answers
33k views

Creating points in specified distance along line using QGIS?

I want to use QGIS creating points along the line, but in specified distance. I found two GRASS tools in SEXTANTE Toolbox: v.to.points v.segment I tried v.to.points, setting the maximum distance ...
0
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2answers
2k views

Creating 3D lines from 3D points

Can you tell me the procedure in ArcGIS 9.3 to create 3D lines which connect the 3D points using the elevation of the points. For example, if pointA has 20 elevation and pointB has 30, then the line ...