Used for questions about making polyline features
0
votes
0answers
10 views
Creating 3D lines from 3D points
Can you tell me the procedure in ArcGIS 9.3 to create 3D lines which connect the 3D points using the elevation of the points.
For example, if pointA has 20 elevation and pointB has 30, then the line ...
3
votes
1answer
150 views
Leaflet: how to draw curved lines?
So, I'm trying to draw curved lines in my application which is based on a Leaflet map.
As far as I know Leaflet does not support drawing curved lines at the moment, so my question is really more ...
13
votes
7answers
2k views
How to create a trade flow map in Arcgis 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 ...
4
votes
1answer
338 views
How to make radial flow map showing curved lines over short distances (20km) (ArcGIS 10)
These instructions show how to make a radial flow map: http://blogs.esri.com/esri/arcgis/2011/09/06/creating-radial-flow-maps-with-arcgis/
But I think the curved lines will only be produced over a ...
5
votes
3answers
925 views
How to create spider diagrams (hub lines) in PostGIS?
I'm rather new to PostGIS but I have done a lot of reading. One thing that I have been searching for is a function that allows users to create a "spider diagram" (also called "desire lines" or "hub ...
7
votes
4answers
5k views
How to make a one part polyline from a multipart polyline?
I have a polyline which is divided into multiparts and these parts are not well ordered so that the vertex's ID are not following the polyline's plotting.
This polyline is a representing a bus line ...
7
votes
2answers
620 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
1answer
447 views
How to create create cross-sections in ArcGIS?
I have some problems to find the correct tools for a university project I am working on. Would be really nice if someone could help me to find the right tools.
Is there the possibility if I have a ...
1
vote
1answer
66 views
From a trajectory of GPS points to a 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, ...
0
votes
0answers
52 views
Congressional Redistricting
I have a project coming up where I need to create new congressional district looking at only total population data. I am planning on using the census tract level of data, but I am having some ...
0
votes
1answer
35 views
How to smooth XY Co-ordinates of linear feature?
I need to smooth xy co-ordinates. see the image:
In this case, i need to remove 5,6,7,8 and 9th co-ordinates or need to make those co-ordinates as a straight line between 4th and 5th. is there any ...
7
votes
3answers
240 views
How to derive vehicle paths from timestamped location data?
I've got a bunch of location data for snow plows. There's a unique id for every plow, a timestamp, and x & y coordinates.
Instead of knowing where hundreds street plows were at one minute ...
10
votes
5answers
5k 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 ...
7
votes
3answers
214 views
How to create transects from polygon centroid?
I have mapped potential study sites using polygons. What I want to do is create 9 125m transects spaced 75m apart. The center point of the middle transect needs to be the centroid of the polygon. Do ...
6
votes
5answers
736 views
How can I map a matrix of origins and destinations in QGIS?
I have a central point on a map, and I have other points in a separate layer (the location of a venue, and the origin cities of the venue visitors). Is there a plugin which would generate output ...
5
votes
1answer
159 views
How to draw a line between two places with via-points?
I have prepared a GPS-tracking dataset, currently consisting of one table with stopping points and one table with the raw GPS-points. The first table contains a column for any stopping point showing ...
2
votes
1answer
57 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
236 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
100 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 ...
5
votes
1answer
229 views
How to automatically create all possible polyline routes connecting many point locations around a polygon obstruction?
Lets say I have 30 ports on the west of an island, and 30 on the east, and need to calculate all possible shipping distances between each and every port, with the routes having to steer around the ...
1
vote
1answer
96 views
Why ignores Google Earth the gx:altitudeOffset in KML files?
I am currently writing software that creates 3D polylines and outputs these in KML format. According to the official documentation it is possible to define an altitude offset via gx:altitudeOffset to ...
2
votes
2answers
154 views
How to create a multipart polygon?
I have two polygons that consist of two separate polygons/lines in QGIS). How can I make this into a multipart polygon, which consists of 1 line in QGIS?
3
votes
0answers
93 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 ...
1
vote
1answer
93 views
Create lines from a Blob field in ArcMap/Catalog or FME (or any other way)
Is there some way to create lines from geometry stored in a Blob field? It's a SDE-database line feature class that has crashed in some way, but I can still get the raw data and the feature class ...
6
votes
2answers
206 views
How to create line with exact same length over and over again?
I need to draw 30 meter lines in specific places. Ctrl+l is too annoying to do everytime. Is there a easy way to define specific same length for a line that I need to draw many times?
13
votes
2answers
1k views
How can I switch line direction in QGIS?
Something that is hopefully pretty easy.
I would like to be able to swap the direction of a polyline/line in QGIS. I made a custom tool to do this in MapInfo a couple of years ago, however I can't ...
5
votes
2answers
320 views
How to create a shapefile consisting of 2 lines using Python OGR?
How would you create a shapefile consisting of 2 lines using Python OGR?
First line is no problem, but how do you reuse MyLine and Feature objects to create the second line?
Ultimately this will ...
4
votes
1answer
202 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 ...
3
votes
2answers
312 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 ...
3
votes
3answers
250 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 ...
2
votes
1answer
126 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 ...
7
votes
4answers
3k views
How to join lines 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 ...
3
votes
6answers
4k 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 ...
3
votes
3answers
432 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
2answers
248 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 ...
7
votes
2answers
3k views
Using python in ArcGIS, create a line of varying distance from an origin point
What I'm trying to do is create a line feature from a single point, using a set distance and angle. Using ArcGIS and Python (I hope). Here's the scenario:
Say I have a point at these coordinates: ...
0
votes
2answers
189 views
How to densify a polyline according to a specific length? [duplicate]
Possible Duplicate:
Add vertices to lines
I am using QGis 1.8.0
I would like to densify a polilyne according to a particular length of segment (ex. 200 m). I know it is possible with other ...
2
votes
1answer
183 views
how to make a line from a set of gps points?
As a part of my research 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 ...
1
vote
1answer
444 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 ...
2
votes
1answer
492 views
Basic User Questions: Tracing a Border in QGIS
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 ...
3
votes
2answers
449 views
Generate non-overlapping shapes from a buffer
I have a collection of points, and I need to generate shapes around these points.
Let's assume that these points are locations of offices and that the shapes are the 'area of responsibility' around ...
1
vote
0answers
325 views
Length in meters arcobjects [duplicate]
i have a an array of polylines in epsg:3857 projection, and i want to calculate length of each polyline. i am new to arcgis and arcobjects, i couldn't find the functions that i need.
Should i use ...
4
votes
2answers
4k views
How to write a script that will automatically draw lines from one point to multiple destination points? (ArcMap 9.3)
I need to create lines from an airport to numerous destination locations. The destinations change often, so drawing them manually becomes tedious. I want to create a script that will draw them ...
3
votes
1answer
455 views
How to create an offset polyline in arcpy?
I am trying to create an offset polyline using arcpy, identical to the function in ArcObjects (constructoffset). After trying to access ArcObjects in arcpy, which I found difficult for those not ...
3
votes
2answers
702 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 ...
4
votes
2answers
983 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 ...
1
vote
1answer
690 views
ArcGIS - VBA - How can I create perpendicular polylines of a specified length that retain the attributes of the original polylines
i,
I am using ArcGIS 9.2 and am desperately trying to create perpendicular polylines to existing polylines that I have. I would want the perpendicular lines to cross the original lines at their ...
1
vote
2answers
248 views
How to import matlab data into ArcMAP?
I'm creating regression lines using matlab from points having UTM geographic coordinates.
I would like to import those regression lines into a map of the same area in ArcMAP.
My question is what ...
1
vote
1answer
576 views
How to create multipart line and polygon with interior ring in ArcGIS Python?
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
1answer
477 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 ...
