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Questions tagged [line]

A set of ordered co-ordinates that represent the shape of geographic features too narrow to be displayed as an area at the given scale (contours, street centrelines, or streams), or linear features with no area (county boundary lines)

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29 views

Selecting/tracing part of line feature using QGIS?

I have a shapefile which comprises a number of lines, each representing a bus route. I'm wanting to create a new bus route which is the same as an existing line to a certain point, but then branches ...
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1answer
35 views

Splitting multilinestrings in segments using PosgreSQL

I need to split several multilinestring into a defined number of segments using PosgreSQL. I tried using ST_subdvideand ST_segmentize but they didn't work. Can someone help me to solve this problem? ...
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23 views

Combine two polyline shapefiles together?

I am using ArcGIS Desktop 10.5. I have several shapefiles, each of which represents the road network of a different county. I want to merge them into one shapefile, and then create a network dataset ...
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1answer
24 views

Bulk Snapping Points to Line Vertex in QGIS?

I have around 8000 point features that require snapping to the nearest line vertex. Please see below image for reference. I would like to do this in one go if possible. Is there a tool in QGIS 8....
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1answer
66 views

Line width and labels based on blended values of features sharing same geometry in QGIS

I want to appropriate line segments that share the same geometry with a particular line width and labels based on the aggregated values of one field "GIS@BUS_5_Min". My attribute table and polyline ...
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1answer
18 views

Selecting features with same geometry within one shapefile

I am working on a public transport network in one shapefile (polyline type). Certain bus routes share the same path, means that one line-part can repeat more than once. For instance, if I select a ...
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2answers
34 views

Add line feature using bearing

QGIS 3.4.Is there a way using advanced digitizing to use a bearing, i.e. N 45° 15' 25" E as the angle?
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0answers
40 views

QGIS 2.18.xx - copying 3Dlines fails

I'm familar and working with QGIS Ver. 2.18.xx . Now I use the v.drape function to sample new precise heights to existing 3Dlines from a "source" layer, this generates a temporary layer "3Dvector" ...
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0answers
17 views

Parameters for BSL Package in R

I am using the landsat BSL (Bare Soil Line) package from R https://rdrr.io/cran/landsat/man/BSL.html, and I am wondering why the code sample is using llimit 0.005 and not 0.01: BSL(band3, band4, ...
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0answers
44 views

Determining intersected end point or first point of line with a point

I do geoprocessing using arcpy that depends on first point or last point of lines. I have problem getting information from lines about end point and last point. How can we find out if a line's vertex ...
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1answer
24 views

Inserting line along line using ArcPy?

I try to insert a line between two lines. End points of lines are in intersection of lines. I use positionAlongLine in arcpy but it interestingly gets coordinates from the first points of referenced ...
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1answer
45 views

Count number of points on a line in R

I have a SpatialLinesDataFrame and a SpatialPointsDataFrame. I want to calculate the number of points that fall on a line by a specific field in the lines data frame. Example: I have a river network ...
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1answer
37 views

Deleting overlap between two polyline layers in ArcMap? [closed]

I have two stream layers and they overlap, I want to delete this overlap on one layer so I do not repeat any information. How do I do this? I can only seem to find information regarding polygons.
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0answers
19 views

Maintaining integrity of split line

I want to split a line at some desired points. While doing so with SPLIT AT POINT tool, I observed that it does't maintain the integrity of the split line. By that i mean, the line is getting split ...
1
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1answer
50 views

QGiS 3.0: Line length without overlapping parts

I have overlapping lines in my layer and want a total length of the visible line without the overlapping part. i.e. I have two lines First one goes A-B-C Second one is B-C-D How do I get the ...
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1answer
46 views

Calculating Bare Soil Line using R?

I am using a package in R called BSL (Bare soil line), package is at https://rdrr.io/cran/landsat/man/BSL.html. I've used it successfully to run regression line for my soil study area but it is ...
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1answer
28 views

Lines from Oracle Spatial Layer in QGIS are not completly visible

I connected a spatial layer from the Oracle database which contains lines (OracleDB objectclass typ is polyline) to be visible in QGIS. An example geometry is as follows: sdo_geometry(2002,2056,...
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1answer
23 views

Splitting polyline at multiple points using Mapinfo Pro?

I have a table of points and used the mapbasic app "Connect the Dots" to create a polyline. The problem is it creates a single polyline and I want to split it up into separate lines so I can delete ...
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2answers
20 views

Merge only lines that they are touches on QGIS 3.2.3 and create a shapefile output with the result

I have a project with five lines, every element have a different ID. This is view below: I want to merge only lines that there are touching. According with this conditions the lines they should ...
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1answer
34 views

Merging lines, issue

I use qgis 2.18. I've merged two lines into one with the merging tool from advanced toolset. When I cut off a small part of the line, I see the original lines again? In these two lines I have the same ...
2
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1answer
42 views

Create perpendicular line transects - PostGIS

I have a river network (Line with arrow as shown in image below) and I need to create perpendicular lines to the river at every 15 meters as you walk along it (see image below). Is there a function in ...
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0answers
24 views

How to keep point number when converting to a line

I have a layer of point that I convert to a line with the plugin Point2One to be able to do apply a smoothing with the generalizer tool. It works well! then I convert my layer back to points using the ...
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0answers
47 views

Changing direction of one polyline in the set of two parallel polylines

In my database, I have a bunch of parallel (in nature) polyline objects. Those lines are having the same direction of traffic flow. The requirement of my project is to change the direction only of ...
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0answers
42 views

QGIS “Sum Line Lengths” return 'nan.'

I have a polygon shapefile and a (merged) line shapefile (both are zipped). When I use Vector -> Analysis Tools -> Sum Line Lengths on these shapefiles, I get a layer with some of the LENGTHS filled ...
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0answers
51 views

Connect discontinuous lines in QGIS

In QGIS, I want connect the lines that doesn't have spatial continuity and remove the small lines (red circles), but the area is extensive and it's not feasible to do this manually. Is there any way ...
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0answers
23 views

Distance between points along separate polyline layer

I have an interesting problem to solve. Data: polyline layer of railroads (multiline with 11373 separate lines, also running parallel, separating and merging in many locations) point layer with ...
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0answers
13 views

Google Maps, middle point/ Halfway mark of road

I'm wanting to supplement some address data I obtained on ArcMap with the coordinates of the roads that the World Locator cannot find but appear on Google Maps. No house numbers are available for the ...
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0answers
20 views

Process to smoothing curves and lines of Centerline Layer?

I am looking for a workflow to improve the visual appearance of a municipal centerline shapefile that I will be using for some mapping outputs. It is a standard line segment vector layer. I have ...
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0answers
11 views

Averaging attributes from small line segments into a new line segment

I'm working on a project which involves combining shorter road line segments into longer ones where needed using ArcGIS 10.5. Each segment has an attribute of average traffic flow. For example, there ...
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0answers
27 views

Shapefiles and attributes from ArcGIS Pro missing in ArcMap?

I have data that is a series of digitised polylines that due to issues with maintaining the Z component have been exported (from another software package) as XYZ points in .csv format. Using ArcGIS ...
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1answer
38 views

Splitting line into segments of different length with ArcGIS Desktop?

I have a river network and I have to split each river into transects of different length. The distances where the lines have to be split are in an excel sheet. For example I have to split the river 1 ...
1
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1answer
63 views

A line between point to nearest neighbour point using QGIS

I have a layer of points in QGIS which represent electric poles How do I create a polyline layer that would have lines running between the poles so it can represent the the electric cables that ...
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0answers
41 views

Adding Points to line at certain distance using QGIS?

USING QGIS 2.18 This question seems to have been asked a ton with lots of options.i just need to add some points/nodes/vertex to a line at a recurring distance along that line. There are some ...
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0answers
44 views

Add line programatically in OpenLayers 3?

I successfully added point like this: var iconFeature = new ol.Feature({ geometry: new ol.geom.Point([8637791.36, 1456487.82]), name: 'Police Station', population: 4000, rainfall: 500 }); ...
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0answers
32 views

Difference between/uses of kernel and line density?

I am reading up on density calculations and their variants, and situations to which they might each be applied. I have read the article on differences between point line and kernel density I was ...
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1answer
24 views

QGIS Line Subdivide by distance

I know in QGIS you can subdivide a line, but is there a way you can type in a distance and the line will split according to this, with the last segment being smaller in length? If not I will try to ...
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0answers
45 views

Is there a keyboard shortcut to draw a perftectly straight line?

In most programs, when you have a line tool, you can hold control or shift and it will let you draw a perfectly vertical or horizontal line, sometimes it the tool will snap at 90 degree angles. How ...
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0answers
24 views

Split to equal length option is not working properly

I have a road data (line vector) which consist of a few lines and I have the length of each line segment. I want to split it into segments of 100m. When I used v.split tool, apart from 100m segments, ...
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0answers
47 views

r - intersection of 3D objects

How can an intersection of 3D object with 3D object be done in R, for example a 3D line with 3D polygon ? Saw that "sf" provides some possibilities but didn't get the desired result. What was ...
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0answers
48 views

Analyzing single Polygon or Polyline that overlaps itself using ArcObjects?

My current process is to determine obstructions in an area and determine properties of those obstructions as they relate to a center polyline. Per the image below I take a polyline which denotes a ...
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0answers
37 views

Which ArcGIS tools to use to get perpendicular distance between polylines

I have a polyline shapefile with several thousand polylines. Each polyline is within a polygon, and the Polygon_ID is contained in the polyline shapefile attribute table. I need to figure out the ...
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0answers
18 views

Extracting maximum cell values to Intersecting polylines

I have 2 datasets. The first one is a 32 bit floating point raster, that identifies a flood depth value, in feet. The second one is a roadway feature class, segmented at each road intersection. I have ...
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0answers
19 views

Detecting bow in lines of file?

We have a file made in CartaLinx that has thousands of polygons manually vectorized. Apparently, some of the lines go over themselves so the file corrupts frequently. Cartalinx can't find the bows ...
0
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1answer
49 views

Finding line style for ArcMap?

I am running ArcMap 10.6 and I need a line that I thought would be included in the standard styles. It is the line symbol used when a polygon feature crosses a line feature and you want to show that ...
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1answer
79 views

Creating 3D polyline just below another polyline using ArcGIS Desktop?

I have a geological setting where I would like to add a lithology to an existing map. I already have the 3D polylines from my geological map and the DEM I now want to add another polyline between two ...
0
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1answer
68 views

Geoserver SLD styling to align labels at the center vertical of roads

I've used SLD to style road features in Geoserver. As roads include multiple segments the 'group' attribute has been used to control label repeat of roads. The problem is some labels can't be placed ...
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1answer
32 views

Splitting line in proportional parts in QGIS

I have recorded flight paths of birds as lines. Now I want to transform the lines to points, which represent the bird's position in a minute interval. For this I want to divide the lines by the time I ...
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2answers
115 views

Finding which side of closest polyline point lies on in QGIS?

I would like to find on which side of the line (left or right) my points are located with respect to the direction of the line (like knowing the rivers bank along a meandering river). But, if there ...
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2answers
92 views

Line/Polygon intersection with a tolerance in QGIS

I have a layer with Polygon and a layer with Polylines. I am looking for the list of Polygons crossed by the Polylines. Just here it's relatively simple: intersection function. That said, the ...
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1answer
48 views

Parallel lines inside of polygon

I have an irregular polygon. I want to make parallel lines with 14 meters of space between the inside of the polygon using QGIS, does not matter the direction, but it is necessary to have the least ...