Used for questions about making polyline features

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5
votes
6answers
8k views

How to divide a single polyline feature into multiple features based on points located on it?

I have a shape file that contains the bus route information for a city. I want to do two things.. Merge all the existing rows so that just one feature represents all the routes... I have a Points ...
4
votes
2answers
637 views

How to create polyline feature from two input points by following/tracing another polyline?

I have a list of things each have two grid references, start and stop points. I can turn these into points and join them with polylines. But what I need to do is have the lines that join the points ...
0
votes
3answers
41 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?
0
votes
0answers
11 views

How to create a polyline using multiple points using a PostgreSQL query?

I'm trying to use point data to create a polyline to show my bus route. Initially began with coordinates and used this to create geom using the ST_MakePoint function (written to the BusRouteData ...
2
votes
0answers
32 views

How to create multiple polyline transects with a certain orientation?

I am attempting to create multiple polyline transects and use them as cross-section profiles to analyze snow drifts on a landscape. Is there a method of creating multiple transects in such a way that ...
4
votes
3answers
80 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 ...
1
vote
0answers
34 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 ...
4
votes
1answer
786 views

How to create polygon from xy data?

I have huge number of x and y data . these are left longitude,right longitude,buttom latitude and up latitude. each row is an extent of a polygon.i'd like to create a polygon using these data without ...
5
votes
3answers
2k views

How to find line length in QGIS while editing?

I am using QGIS (before, I used ArcView). I would like to know if there is any way during the editing phase of a vector (line or polygon) to know the length of the line (total and partial) that is ...
1
vote
1answer
50 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
votes
1answer
90 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
vote
1answer
760 views

ArcGIS 10.2 Extract Polyline from Start/End Coordinates

I have two files. A polyline shape file of highways and a spreadsheet that contains beginning and ending coordinates w/ descriptions of segments of the highways. For example: BegX, BegY, EndX, EndY, ...
1
vote
0answers
54 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 ...
8
votes
3answers
5k views

Converting Shape Polyline-M to Polyline using ArcGIS Desktop?

I have some pretty old software that I am forced to use (no option). It's old enough that it doesn't recognize shape files of type Polyline-M, it only recognizes shape files of Polyline. I have a ...
3
votes
3answers
165 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 ...
2
votes
1answer
314 views

Shorten polylines a given distance

I have a polyline dataset with lines of different lengths. I want to shorten all polylines the same distance on both ends (e.g. 10m each side). Is there a tool or script available that could help me ...
8
votes
2answers
1k views

How can I create random points along a polyline in QGIS?

I am trying to create random points along a polyline shapefile in QGIS. Basically, like the 'random points' tool in 'research tools' but for polylines instead of polygons. I have tried converting ...
3
votes
2answers
8k views

Creating line with specific length using ArcGIS Desktop?

How can I create a line in ArcGIS 9.3 to a specific length? I click once to start the line where I want it, and then I want it to be, say 10 Meters in length ... Similar to AutoCAD.
0
votes
1answer
34 views

Failing to get wkt to reference for a multiline

I apologize, I'm quite new to WKT (and most everything else). I have a shape that I've exported to csv. & geoJson to be loaded into CartoDB. Unfortunately, the geoJson doesn't work so I am trying ...
10
votes
2answers
5k views

Creating line of varying distance from origin point using Python in ArcGIS Desktop?

I'm trying to create a line feature from a single point, using a set distance and angle. Using ArcGIS and Python (I hope). I have a point at these coordinates: X = 400460.99, Y = 135836.76 From ...
2
votes
1answer
1k views

How to create multipart line and polygon with interior ring in arcgisscripting?

My objective is to swap X,Y coordinates of feature classes using Python and arcgisscripting. Based on help examples, I managed to write script which reads and writes all geometry types. The problem ...
1
vote
1answer
122 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
votes
2answers
247 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 ...
4
votes
3answers
7k views

Draw lines from points

Please any body help me for creating lines from points in electric network for instance electric poles are there in point feature with "polename" field like "P01", "P02", "P03" etc. I need a tool that ...
10
votes
7answers
11k views

How to merge lines with slightly different endpoints in QGIS?

In QGIS, I have two lines. The endpoints are near each other, but not quite aligned. I'd like to turn the two lines into one, with the two endpoints merged into midpoints. The closest I've been able ...
0
votes
0answers
57 views

Any way to make leaflet.draw polyline finite (i.e. max) distance?

Does anyone have an idea of how I could force a maximum distance when creating a polyline with leaflet.draw? In other words, I would like for the user to only be able to draw a line UP TO 1000 miles. ...
2
votes
2answers
561 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 ...
3
votes
2answers
967 views

How to join lines in QGIS for later using “lines to poly”?

After successfully merging lines (using snapping) with merge_selected_features i got nice result - one merged line. Next thing was to make polygon from created merged line. Result is not nice - it ...
2
votes
1answer
75 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 ...
5
votes
3answers
3k views

How to extract POINT from a [LINE|MULTILINE]STRING

I'd like to create a vectorLayer in QGIS to display all the points that form a LINESTRING or a MULTILINESTRING stored in a PostGIS DB. I think that I need to transform all points of LINESTRING (or ...
4
votes
2answers
1k views

Tracklogs to single line OR several lines to one line?

Setting: I have several trucks driving out of my factory delivering goods and coming back for more deliveries. These trucks are equipped with GPS so that they may return tracklogs to me. These ...
2
votes
1answer
437 views

How to display Hidden Linetypes properly when printing from AutoCAD?

I want show the pline type in hidden line type but when I change it I cant show it in printed paper, if I explode it the line are so small that cant show at print, so I want to change the pline to ...
1
vote
1answer
91 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 ...
4
votes
4answers
6k views

Merge overlapping lines in ArcGIS

I have a polyline shapefile containing a number of lines, some of which overlap. By overlap, I mean that they follow exactly the same path for some of their route, but also have bits that are not ...
17
votes
7answers
4k views

Creating trade flow maps in ArcGIS for Desktop (or any free software)?

I am trying to represent trade flows on a world map where the size and direction of arrows indicate the exports/imports of a given country. This type of map is commonly found in magazines and ...
2
votes
1answer
315 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 ...
2
votes
1answer
2k 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. ...
1
vote
1answer
278 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 ...
1
vote
3answers
3k views

ArcEngine 10 Polyline with arrow

I was wondering if there is a way to draw a polyline but with an arrow head at the end point? Thanks all IPolyline line = new PolylineClass(); ...
13
votes
4answers
4k views

How to create one-sided buffers or parallel lines in PostGIS?

I'm looking for a way to create so-called one-sided buffers or parallel lines in PostGIS. Example: 1. buffer, 2. one-side, 3. both-sides I've found some discussion on the mailing list from 2009 and ...
0
votes
1answer
68 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 ...
7
votes
1answer
1k views

Making radial flow map showing curved lines over short distances (20km) using ArcGIS for Desktop?

Esri have provided instructions on how to make a radial flow map but I think the curved lines will only be produced over a long distance, like half the globe. For short distances (20km) a geodetic ...
8
votes
5answers
5k views

How to create points in a specified distance along the line in 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 ...
1
vote
1answer
785 views

Polymaps + D3+ Polyline with different width and color

I am actually working on a project which involves polymaps and D3. I was wondering if you could help me on this. I have 4 locations and I would like to draw a polyline from one location to other 3 ...
3
votes
1answer
181 views

polygon from exterior points

How to convert points data to polygon, so as to form polygon from exterior point as shown above
1
vote
1answer
453 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 ...
8
votes
4answers
3k views

How to create arcs between two points in Python?

I've been working on an python script automating the visualization of live point data. I have a table with two coordinate pairs. I'd like to connect these two point with an arc of a circle or similar ...
11
votes
5answers
9k views

Convert XY points to a line?

Someone mistakenly saved a GPS track as waypoints and then sent them along to me in a .csv file. They want a line back (shapefile). What's the simplest method to convert this to a line? Available ...
0
votes
1answer
222 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. Thanks ...
1
vote
0answers
65 views

Need advice on 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 ...