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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21 views

Advanced Cartography of a line feature [duplicate]

I'm attempting to duplicate the maroon boundary line. I've used offsets in the line symbol editing but can't seem to achieve the smooth blend you see the picture. I've tried using multiple layers of ...
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0answers
17 views

Profile graph from 3D line features in ArcGIS Online

I need to create a web application in argis online to show a profile for a selected 3D line feature. All elevation profile web apps and template I found returns DEM Z values for a selected feature. Is ...
3
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1answer
34 views

Checking if two WGS84 lines intersect in JavaScript

I am trying to work out given two GeoJSON lines (WGS84), if they intersect (i.e. cross one another). Let me give some pseudocode to illustrate: // Providing Line 1 = lon1, lat1 and Line 2 = lon2, ...
2
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0answers
34 views

QGIS 2.12.3 Crashes on buffering line vectors

I'm using QGIS 2.12.3 and I'm trying to create a buffer of 100 mt around a line vector using the Vector - Geoprocessing Buffer tool, but qgis crashes at every try. I've already checked that the RS of ...
2
votes
1answer
9 views

Line offset issue with Geoserver

I'm using Geoserver 2.6.2 and QGIS 2.10 to check my WMTS display. According to the documentation, I have tried 2 different ways to draw a line offset for a line-type layer, but none is working ...
3
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1answer
26 views

Advanced Digitizing Panel bad value or bug?

This is my first post here. What would cause the "Advanced digitizing panel" D (length) to show up wrong? I'm in the US using WGS 84 as CRS. If I add a feature (line) Advanced Digitizing Panels ...
3
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0answers
28 views

Movement in cartodb

I have a DB with the history of the movement of a migrancy family. I would like to display these movement. How can i do? this is a good example my target
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1answer
33 views

Connecting two points in ArcGIS for Desktop?

I have two types of point shapefiles. These two points are linked with another attribute table. Each Point from column A is linked to single/multiple values in column B. Each of these object_IDs have ...
1
vote
1answer
33 views

Connect multiple 2 points with a line in ArcGIS?

I have a table in which each row has two columns representing the objectID of two different point features in the Map. There are thousands of such rows. How do I connect the each of these two points ...
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1answer
55 views

In PostGIS: how to split linestrings into their individual segments?

I have one table with many linestrings and I want to make a new table containing the individual segments of all the linestrings, no matter if they are grouped line per line or not. This is my ...
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1answer
32 views

Extracting raster values to polyline feature

I have a line overlaying a raster containing slope values. I would like to use the line to extract the slope values, and return to its attribute table an attribute containing percentage of slopes ...
1
vote
1answer
46 views

How to export polyline layer from Yandex Maps

I am interested in exporting a polyline layer(s) of Moscow bike routes from Yandex maps. The layer does not belong to me but it is open to public use. I would prefer a KML, but just getting the ...
4
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1answer
39 views

cartographic line develop spikes when applied offset value

version: ArcGIS 10 I am using a number of lines in certain polygon. As I apply offset value to the outline, spikes/kinks are produced as shown in the picture. Any solutions to remove the spikes and ...
1
vote
1answer
48 views

QGIS Polygon edge style based on adjoining feature?

Is there a way to change the style of only PART of a polygon's border in QGIS? I would like one or two edges of certain polygons to render a different color, or not at all, depending on the type of ...
4
votes
0answers
21 views

“Merging” 2 layers of LineString with splits at intersections

I would like to "merge" 2 networks of lines and these lines need to be split when they intersect. With pictures it should be clearer : What to do: if a black line intersects a red line, they ...
1
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0answers
21 views

parallel row detection from binary image [closed]

I have an image and want to be able to get those lines at the left side where they are clearly parallel and those little horizontal lines like at the right side don't exist between them. I used ...
2
votes
2answers
74 views

Creating coordinates from beg and end points on a line [duplicate]

Is it possible to create WGS-1984 coordinates from the start and end points along a line segment? The line features were created using linear referencing but now I need to create lat and long ...
2
votes
1answer
42 views

How to calculate proportion of a line segment around a point?

I am looking at certain variables surrounding points that represent Sea otter raft sites. The coast line surrounding the points is broken into unit lines (Essentially a polyline with attributes for ...
2
votes
1answer
34 views

Why there is no “View Output” button for the command “v.to.points” in Grass plugin in QGIS?

How do i get or where do i get my output vector point layer after i run the command v.to.points to my vector line layer?
2
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2answers
55 views

Place point label perpendicular to line segment

I have a point shapefile with attributes and I want to make the label be perpendicular to a line shapefile, is this possible? Basically my points represent houses and I want the house label to show up ...
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0answers
25 views

Extracting distances along a line from postcode a centroid to the nearest point (bus stop)

I'm looking to measure the distance from postcode centroids (point file) in a city to the nearest bus stop (point file) along the road network (line file). In Qgis I can calculate the distance but ...
0
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1answer
52 views

How to convert a line shapefile to a polygon shapefile? [duplicate]

I am using Arcgis 10.1 and have an existing line shapefile that i would like to convert to polygons.
0
votes
1answer
60 views

Copying point features along line features by predetermined distance

first post here. I searched the forum for this issue but other cases were slightly different. Anywho... I have points in a feature class. Each point has its centroid on a unique line feature in a ...
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2answers
16 views

Control of Output Raster Extent w/ Line Density Tool

In ArcGis 10, I am using the line density tool. The output raster doesn't cover the whole of my study area. How do I control the extent of the output raster?
2
votes
1answer
29 views

Making a Leaflet line feature more 'grabbable'

Is there a way to increase the buffer that makes a line clickable in Leaflet? I know you can increase the width of the line, but the symbology of my feature should not be altered in this case; it ...
2
votes
1answer
49 views

Styling line layer based on two attributes in QGIS ? (1 discrete and 1 continuous)

I have found a really helpful tutorial to style points based on two attributes. Is it possible to make style lines based on two attributes? I have a shapefile with streets that have two attributes: ...
0
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2answers
134 views

How to get the coordinates of the starting and ending points of a line in ol.interaction.Draw in OL3

I'm using Openlayers3 for drawing and storing lines, and then doing some processes on the inputs. Now I want to get the coordinates of the starting and ending points of the line while the line is ...
3
votes
1answer
80 views

Merge connected lines IF they share adjacent polygon(s) (arcgis/arcpy)

I have lots of lines that I need to merge IF and only if they share the same polygon(s). All lines are made from the polygons (copy-paste into line) so they all snap. In this little example line ...
3
votes
1answer
82 views

Extracting values from raster under line using GDAL?

How can I find the cells which lie on a straight line between two points? I.e. how can I find the indices of the cells (in grey) which are intersected by the line defined by the two points (in blue): ...
1
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1answer
32 views

Hide an empty line through Python IF statement in FME Workbench

I am trying to set a rule that would move up filled lines and hide an empty line (it can be on any line) in a postal address through PythonCaller transformer. I have a database table consisted of ...
0
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0answers
27 views

Km driving covering ALL roads (with fewest back and forth)?

Kilometers driving covering ALL roads (with fewest but unavoidably some roads back and forth)? I want to be able to tell some KM for this but it is foreseeable that some roads will be needed to ...
1
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0answers
22 views

Tilemill line offset problem

I use Tilemill to style osm bicycle and hiking routes. All above are supposed to be offset and this works fine. The problem is that sometimes there are empty spaces between the lines. The bigger ...
2
votes
2answers
86 views

Convert point to line

A little background: I recently completed a long bike trip and used a GPS to gather data during the ride, including average speed and elevation loss/gain. I imported the data into QGIS. These data ...
1
vote
3answers
76 views

How to remove identical lines from layer in QGIS?

I converted polygon layer to line layer using "Polygons to Lines" tool. Then I used "Split" function of the Networks plugin. What I need to do next is to remove identical lines that were shared ...
1
vote
1answer
44 views

Line segment to arc?

I have a polygon shapefile in ArcMap 10 made up of several vertices/line segments. I need to convert some but not all of the sides of this polygon into arcs. Is there a way to do that without having ...
0
votes
1answer
40 views

Mean line between two polygons

I have two separate polygons A and B in ArcMap. Which tool I have to use in order to find the mean line between them?
1
vote
1answer
57 views

Create common vertex where line was snapped to another using “snap to segment”

I have a schematic diagram within QGIS consisting of a single layer of line segments. Lines have been snapped to others using "snap to segment". When using the snap to segment option the two lines ...
1
vote
0answers
22 views

Create a center node based on both polygon and line shapefile

Sorry for cross posting. I want to develop a node layer from two other layers. One of the layers is a polygon contains a series of zones. Another layer is a line layer of roads. The nodes I want to ...
1
vote
1answer
204 views

Cesium js, Draw line binding a label to a position

I would like to draw a line binding a entity to its label with an offset. CesiumJS allows to offset the label, however its not possible to draw a line (or polyline) from a position to an offset like ...
0
votes
2answers
139 views

Draw Line in Layout View with ArcObjects

I'm trying to draw a line on layout view on ArcMap with C# and ArcObjects. I'm working on this sample. But I have some problems. 1.) This code for draw line on data view but I need to draw line on ...
3
votes
1answer
86 views

How do I create a SpatialLinesDataFrame from a dataframe?

I have created a data.frame in R . I want to get SpatialLinesDataFrame as a result so I understand that I have to convert the data.frame into lines, the lines into SpatialLines and the SpatialLines ...
1
vote
1answer
61 views

Cut line with polygons?

How do I cut a single line with polygons (in several segments) so that each cut line take data from the polygons? Something like a centroid takes.
2
votes
1answer
73 views

How to get the center line between two linestrings

Where is the track of a ship when it is shipping always in the center of the English Channel between the coasts of Great Britain and France? I started with 2 linestrings and I created a lot of ...
2
votes
1answer
167 views

How connect points with lines in QGIS?

I need to connect points with lines in QGIS. I am in this fresh out so I'm not sure how to do it and I need a little bit help with this. I read several posts i and tried to do something about it but ...
2
votes
2answers
120 views

How to visualize updating lines of bearing from a point

I'm working on a project where I need to visualize a constantly updating line of bearing from a point, based on degree of rotation around that point. My plan is to design a line feature with an ...
0
votes
1answer
43 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 ...
1
vote
0answers
63 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 ...
0
votes
0answers
26 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
60 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
128 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 # ...