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)

learn more… | top users | synonyms

0
votes
1answer
30 views

Shapefiles failing to merge

I am attempting to merge two shapefiles together. Both are line features. I have merged these files before and it worked successfully however due to problems during editing I have to start again and ...
0
votes
1answer
345 views

Update Point ID as Start Node and End Node to Line through FME

I need your help to perform the below process in FME. I have two layers: Pole Data (Point) and Cable (Line). Cable has no ID. I want to keep the Cable which is going through the Pole. Then make the ...
1
vote
0answers
32 views

How to show two layers at the same time in Qgis

I have a question about Qgis layers. I want to see two layers at the same times. one is lines which are boundary lines and the other is polygon which are district. when i was surfing about this ...
2
votes
2answers
658 views

editing existing lines

I have a quick editing question. I have a main line (street) from which I want to extend other small lines to reach some points (manholes), but I want to keep just one feature (the main line). I ...
3
votes
1answer
101 views

Splitting street in Address table which participates in Relationship Class (1-M)?

I have a table "Addresses" and the Feature "streets". The feature "Streets" are lines. I need to do a relation with this table with this feature. What I do? I tried built a "relationship class". The ...
0
votes
0answers
14 views

QGIS and Ghydraulics: add attribute fields from intersecting points to line layer

I have lines (pipes) and points (junctions). There is one point at each connection between two lines, so that every line has a start and an end point. Now I want to fill the attributes "start point" ...
0
votes
1answer
53 views

Clip lines by overlapping polygons

I want to cut a line shape into parts by polygon areas. No problem so far. But the polygons overlaps each other at the border. I need one line result for the whole area of every polygon. Any ideas for ...
0
votes
1answer
37 views

MapServer: Symbol (v-line) style that automatically follows line direction

I created this image: with: MAP SIZE 1000 1000 IMAGETYPE png24 EXTENT -30 -10 60 30 UNITS DD SYMBOL NAME "v-line-shift" TYPE vector POINTS 0 0 5 10 10 0 END # ...
3
votes
1answer
350 views

Dashed lines do not print correct

I have a polygon with a dashed linetype; when viewed in ArcMap the linetype appears correct however when I print to pdf the linetype does not look correct. This might be a pdf quality problem however ...
1
vote
0answers
24 views

QGIS split line into segments on polygon

Is it possible in QGIS to split a line into segments given which polygon it falls within? I am using 2.8. For example, a line that passes through three polygons will become three separate lines. Each ...
4
votes
1answer
145 views

Split single line based on the 3D length

so I have a transect line which I already add the z value using the Interpolate Shape. I need to split this line into 100m in 3D length, which due to elevation must be different than 2D. However the ...
0
votes
0answers
9 views

Representation of streets/highways Geometry

I have Navtech data which provides center-lines with geometric data of the roads. The most important data for me is that it gives me the width of the road as well as the number of lanes for most of ...
0
votes
0answers
18 views

python script for splitting a polygon feature into equal parts

Is there a python script for splitting a polygon feature into equal parts in arcgis 10.1 . I know arcgis 10.3 has a segmentalongline function but I m looking for Arcgis 10.1 functionality. THis is ...
0
votes
0answers
22 views

Drawing Lines Between Postal Codes in Fusion Tables

I'm using Google Fusion Tables and have two columns of corresponding postal codes. Fusion Tables automatically converts postal codes to coordinates (the centroids of each postal code) upon import. ...
0
votes
2answers
49 views

Labelling all features in ArcMap?

I am working in ArcMap 10.2.2. I have a shapefile with line features which I labeled with some vb code. The problem is when I zoom out there are labels that disappear, I have around 4000 features but ...
3
votes
2answers
170 views

QGIS Line End Caps

When styling a road network where all sections of the network between junctions are separate paths, I style the ends of the lines to rounded to remove any gaps that might appear where the joins are at ...
0
votes
1answer
21 views

Erase polygon from line to get line?

How can I erase a polygon from a line to get the erased line? Conceptual image below. Erase Tool does not work when mixing polygons and lines.
2
votes
0answers
16 views

Sampling raster by line in QGIS

I am quite new to GIS, and was wondering if you might be able to help me out? I have a raster layer for gradient as well as a line created from GPS tracking points(using the point connector tool). Is ...
1
vote
1answer
42 views

Need help making polygons from lines in QGIS

I am trying make a layer of buildings, divided into apartments, by making polygons from crossing & intersecting lines in QGIS. When I use the vector/geometry tools/lines to polygons tool, I get ...
2
votes
2answers
176 views

How to extract elevation values at line start and end points from a DEM?

I am new to the whole gis-experience and need your help working with QGIS. I have: DEM raster with heights (3d) line-shapefile which contains the rivers (2d) I need: heights for "start" and "end" ...
1
vote
1answer
54 views

Find intersections between spatial lines and points using R

This question assumes that I'm using R with the sp and rgdal packages installed. Now that I have a set of spatial segments of class SpatialLinesDataFrame (called 'segmentData') and a set of spatial ...
1
vote
0answers
167 views

How to set the length of a line using openlayers [duplicate]

I'm trying edit a polygon by changing the length of some lines by code. Found this method to calculate based on the bearing. But I didn't find anything on how to calculate the bearing, before I start ...
3
votes
0answers
33 views

Extract the outer points of a Point Shape into a Line Shape? [duplicate]

I've installed QGIS 2.8.2 since a few days and have no experience with this application. I try to extract the outer points of a Point Shape into a Line Shape, like a shell for the inner points. All ...
2
votes
0answers
41 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 ...
1
vote
0answers
36 views

Getfeatureinfo is not working with geoserver point line sources

I'm not able to get information with Getfeatureinfo when clicking on point & line layers. For polygons it works fine. I'm using the code below to execute the WMS service: google.maps.event ...
1
vote
0answers
32 views

Batch processing ( offset of font marker) in QGIS

I have a group of layers with type linestring. Every line consists of simple line and marker line (font marker). I have a batch file(csv) with offsets of font markers. Do you know if there is any ...
1
vote
2answers
51 views

How to get ST_MakeLine ready for QGIS?

CREATE VIEW new_line AS SELECT point1.gid, ST_MakeLine(point1.geom, point2.geom) FROM point1, point2 WHERE point1.gid = point2.gid; It's possible to load the layer but QGIS says 'There is no entry ...
0
votes
0answers
20 views

How to graph a line given a great distance (e.g. 100km) and the angle?

I'm new to QGIS and I'm trying to graph subduction zones and I was given the starting point (in latitude and longitude), the length (in km) and the angle (in deg). How is it graph correctly? I tried ...
3
votes
1answer
68 views

Issues merging divided carriageways using Skeletron

I would like to merge divided roads from openstreetmap, and a tool that keeps getting mentioned is Skeletron, for example here. I tried the tool on a small geographic area, and the results are fairly ...
2
votes
1answer
64 views

Draw line with lon, lat, distance and azimuth

I have table in PostGIS with lon, lat, distance and azimuth columns. I want to make Geoserver draw a line through first point with given length and direction. I can turn lon and lat to geometry in ...
2
votes
1answer
106 views

How to extend line features up to their intersection point in QGIS?

Is there a tool or plugin in QGIS to extend line features up to their intersection point?
1
vote
1answer
29 views

Importing Edge List into QGIS?

I have a CSV edge list such as follows: Lat1,Lon1,Lat2,Lon2 93.41823,-104.324324,93.41828,-104.324320 93.40110,-104.310552,93.40108,-104.310557 ... Is there a way to import such a CSV file into ...
0
votes
1answer
22 views

Join line segments sharing a common attribute, using GDAL

I'm having trouble rendering a shapefile consisting of trail routes broken down into many short segments. So I'd like to combine them into a small number of line features, which share a NAME and touch ...
1
vote
3answers
657 views

Divide Line Into Sections Using Points Offset from It in ArcGIS Desktop?

I have track (line) and milemarkers (point). Each point is offset by a different distance. Is there a way to find where each point would intersect the line if going perpendicularly out from the line? ...
7
votes
4answers
30k views

How to create polygons from lines?

I am trying to create polygons from a line layer of lots and concessions (large blocks of land in rural areas). The lines are mainly grid style as they intersect mostly at right angles. I need to ...
-1
votes
1answer
21 views

Converting start/end easting/northings to a single point for visualisation

I have eastings and northings for the start and end of 5m sections of the UK railway network. I want to convert these points to a central point between the start and end so I can visualise the ...
0
votes
1answer
36 views

Rasterizing a simple sloped line

I am aware how to rasterize a 2D line, but if I have two coordinate triplicates (x1,y1,z1) and (x2,y2,z2), how can I efficiently rasterize the resulting connecting line such that the raster cell ...
1
vote
0answers
37 views

Tool, API of or code samples for calculating spatial similarity between Lines

I am migrating a database with a road network to an other external data provider. We have joined our own data about roadworks, temporary speed-limits, etc., using ID and linear referencing on this ...
0
votes
0answers
41 views

Extending line by adding point at end of it using QGIS?

I'm using QGIS 2.8 to modify a line. I need to add a point on one end of this line, and then move this new point further away, leaving the original end point in the same place. I can manage to create ...
4
votes
2answers
86 views

How to extract nodes with PostGIS to a multipoint geometry

I have a line in a PostGIS table test_line. I want to extract it's nodes into a multipoint geometry. I tried the following: SELECT ST_Collect((ST_DumpPoints(the_geom)).geom) FROM test_line; But it ...
0
votes
0answers
39 views

Intersection of two lines from points with direction angles [duplicate]

Given two points and direction angles from each point to a third point, but no distances, how do we get the x,y coordinates of the third point? In other words, how to find the intersection point where ...
2
votes
1answer
71 views

How to interpolate line Z from sparse attribute values

I have a series of end-to-end connected 3d lines which I'd like to add elevation values for all vertices on the lines which are currently null or 0. How to accomplish this? In the following image ...
2
votes
1answer
57 views

Contour line density thinning

Would anyone know how to thin contour lines in high gradient areas such as a cliff face? Using Esri ArcGIS 10.1 with Maplex labeling engine.
0
votes
2answers
43 views

Connecting to lines, which are not spatially connected to each other, using FME?

I have a shape file, which contains lines. These lines are not spatially connected to each other. More specifically the end of one linestring has a slightly different coordinate from the start of the ...
5
votes
3answers
10k views

Converting multiple lines into single line using ArcGIS Desktop?

I've no idea if this is basic or what but I have this data that contains multiple lines (forming a polygon shape). I want to convert those lines (multiple - each with a start and end point) to a ...
3
votes
2answers
171 views

Creating polygons from line segments using PostgreSQL and PostGIS

Is there a PostGIS function that creates polygons from multiple line segments? I want to convert the pictured thirteen lines to four polygons. All lines belong to the table "boundary" (gid, geom). ...
1
vote
1answer
73 views

Giving line features of same layer different colours

I have one layer and there I have different lines. Imagine these lines are pathes of persons. So image a person x and y. And I now want to differ them by just watching on the different colours of the ...
2
votes
1answer
331 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 ...
3
votes
1answer
985 views

Splitting lines at a specified distance

Does exist some plugin with it is possible to Splitting lines at a specified distance in Qgis?
3
votes
1answer
1k views

How to split line at a specified distance and getting coordinates of start and end points of each line segment?

I tried v.split in GRASS: and my notebook ran a lot of time but showed this error:bad allocation, then I click "OK", and got nothing. Are there other ways to split lines?and I hope to get 2 new ...