Questions tagged [polyline-creation]

Used for questions about making polyline features

4
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6answers
45k views

How to connect points with a polyline in ArcMap 10?

I have a layer containing a few hundred points representing a survey track. The points are laid out in chronological order in the corresponding attribute table. How can I have ArcMap 10 automatically ...
4
votes
3answers
327 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 ...
4
votes
1answer
1k 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 ...
4
votes
4answers
3k views

How to determine a point lays within a polyline in arc engine?

I recently asked a similiar question on this, however I needed to know if there is a way to solve this if I only have a IPolyline Feature, and not the whole layer. I want to know if I can determine ...
4
votes
2answers
713 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 ...
4
votes
1answer
856 views

Why is my polyline on the wrong bearing?

I am trying to overlay duplicate segments of polylines on a map via javascript. I am using latlon.js and geo.js from here The idea is that a user can input the distance they have travelled and when ...
4
votes
1answer
560 views

Convert Landmask file into WKT Polygon

I have a land mask file in netCDF (also in ascii, if needed) which basically consists of a lat/long pair and a boolean (1 or 0) determining if that value is over land or not. The thing is, I'm not ...
4
votes
3answers
8k 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 ...
4
votes
1answer
426 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 ...
4
votes
1answer
2k views

Conversion of raster features to polylines: skeletonization?

I would like to identify linear features, such as roads and rivers, on raster maps and convert them to a linear vector features (i.e. polylines). I typically use R as my primary GIS, and have posed ...
4
votes
1answer
668 views

How can a single line be computed from multiple possibilities

I have datasets containing continuous GPS streams of data that represent routes or trails. For any given route, I probably have at least 5 (in some cases many more) different sets of data. Given that ...
4
votes
2answers
1k views

Draw two separate lines from A to B and B to A

I have an Origin-Destination table like this Origin Destination Value A B 10 B A 100 A C 120 ... For all the locations A, B, C... I have another table indicating their location (Lat and Lon) Is ...
4
votes
2answers
708 views

Digitizing raster in ArcGIS Desktop?

I have the raster below which I want to convert to a set of vector lines: As you can see, there are small breaks in the lines and some bits are double-width. I want to be able to reliably import ...
4
votes
2answers
869 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 ...
4
votes
2answers
2k 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 ...
4
votes
2answers
2k views

Densifying polyline according to specific length using QGIS? [duplicate]

I am using QGIS 1.8.0 I would like to densify a polyline according to a particular length of segment (ex. 200 m). I know it is possible with other GIS software. Is it possible to do this in QGIS?
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. (...
3
votes
5answers
2k views

script for automated line drawing procedure for set of start and end points [closed]

A colleague conducted a field survey and recorded the start and end points of the transects with a GPS. These points have been imported to ArcMap 9.3 as 2 point layers. Both layers have a "transect ...
3
votes
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 ...
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 ...
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?...
3
votes
1answer
457 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 ...
3
votes
1answer
2k views

Changing (flipping) line direction in QGIS?

I have river network in QGIS. I draw opposite direction one of the rivers. Now I want to change direction of that river. How can I do that in QGIS 3? (As I know it is flip in ArcGIS)
3
votes
1answer
199 views

Creating edge lines between specific polygons

I have a polygon layer containing habitat types. It looks something like this: where dark green is forest, yellow are open lands and the other signatures different other habitat types. In order to ...
3
votes
3answers
2k views

How to create svg line style in QGIS?

I need to draw an telephone or energy lines as is done on the polish-core map. Thelephone line was drown by the polyline. I tried the SVG symbols, when I have a lot of single-lines, for each I 'put' ...
3
votes
1answer
2k views

Openlayers Add features performance for 3000 lines

We would like to implement the function of Addfeature in openlayers to draw lines and push them onto a vector layer, and overlay this layer onto open street map or google map. Those lines are draw ...
3
votes
2answers
1k views

Is there a way to make a straight line in ArcEngine 10 (Polyline but with ONLY start and end)

So I want to allow the user to create a connection between 2 polygons on my map. So it doesn't make sense to allow them to draw polyline with multi points. My question is, is there a way I can do ...
3
votes
1answer
383 views

Curve from a Douglas-Peucker line

When generating a line using the Douglas-Peucker Algorithm the resulting object is a line with steep angles, I would like to "smooth" that line and making it look less "squarish" using curves, like ...
3
votes
2answers
920 views

esri google maps api - Create a single GPolyline from an array of features

I'm using the esri google maps extension api... I have a esri.arcgis.gmaps.FeatureSet() (of type esriPolyline) containing an array of features (esri.arcgis.gmaps.Feature()). Is there a simple way ...
3
votes
1answer
550 views

Merging overlapping lines into one line. QGIS

I have a shapefile with multiple perfectly overlapping lines. Each line represents traffic at a certain point in time. I would like my output to have only one line but with the attributes from all ...
3
votes
1answer
3k views

How to create perpendicular line from point on one line to an intersection with the nearest polygon layer?

I am trying to create laterals from a layer of sewer mainlines and have yet to Google a thoroughly helpful answer. Hoping to find some help here. I have a layer of mainlines that have a direction ...
3
votes
1answer
4k views

Creating cross-sections in ArcGIS Desktop? [duplicate]

Is there the possibility if I have a polyline (named "Linedivide") which is divided into, let's say, 5 parts to make ArcGIS draw perpendicular lines of special length at the middle of all 5 parts of ...
3
votes
0answers
82 views

Googlesheets CSV auto-update polylines to ArcGIS Online Maps?

I have been able to establish a ArcGIS Online map that auto-updates from a CSV spreadsheet within Google Sheets. The data that is auto-updating is point data with associated tabular data that will ...
3
votes
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 ...
3
votes
0answers
148 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 ...
2
votes
1answer
1k 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 ...
2
votes
1answer
2k views

Basic User Questions: Tracing a Border in QGIS [closed]

The project: I'm plotting a dilapidated cemetery, I'm using GPS waypoint data to plot the headstones in QGIS. The map I'm making is to show the orientation of the graves, and who is in them. I ...
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 ...
2
votes
1answer
2k 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 ...
2
votes
3answers
3k views

ArcGIS 10's Editor and Snapping toolbars question (snapping polyline to another polyline)

Have attempted this about 20 different ways using Editor / Snapping Toolbars and ET GeoWizards but still cannot find solution. Screen shot is attached. Need to snap the green polyline to the red ...
2
votes
2answers
176 views

Extend lines to nearest feature

I am attempting to extend a series of polyline features to an adjacent polyline feature. I need the lines to intersect, but not extend beyond the 'first hit' of the adjacent polyline feature and ...
2
votes
1answer
366 views

Create polyline layer from csv-file (id, lat, long, time) in QGIS

Some units are moving and regularly registering it location. Each of these register events corresponds to row in a csv-file. This row contains fields: id (unit identifier), lat, long (event location)...
2
votes
1answer
293 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 ...
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 ...
2
votes
1answer
2k views

From trajectory of GPS points to multiline segment?

Given a trajectory as a sequence of GPS points I would like to create a smooth linestring representing a path where a car drove. The data is stored in postgresql: the input trajectory in a table, ...
2
votes
2answers
2k views

Making line from set of GPS points using ArcGIS for Desktop?

I need to create the trajectory of respondents according to the their collected GPS data (including X and Y). I am familiar with python programming, but I am a beginner in ArcGIS. I want to write ...
2
votes
2answers
238 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)....
2
votes
1answer
308 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 ...
2
votes
1answer
1k views

How to display hidden line types properly when printing from AutoCAD?

I want to show the pline type in hidden line type but when I change it I can't show it in printed paper, if I explode it the line are so small that can't show at print, so I want to change the pline ...
2
votes
1answer
42 views

Split a polylines according to a specific point in R

I have 2 distinct spatial objects: on one hand I have a SpatialLinesDataFrame on the other hand I have a SpatialPointsDataFrame Considering one line and one point that intersects that line, I ...