Questions tagged [trajectory]
An ordered collection of x,y,time coordinates.
60 questions
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Defining outbound and return directions of GPS points in QGIS
In QGIS, I have a layer of points corresponding to the positions of my vehicles every 2 seconds. So, my layer contains the following information:
XY coordinates
Vehicle number
GPS heading
Timestamp
...
6
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2
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362
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Is there a common method for measuring "curviness" of a line?
I have a bunch of GPS tracks in a Postgres+PostGIS database and want to extract a single metric as a measure of turns shown in the data. Some of the GPS targets travel in almost straight lines while ...
- 1,695
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Calculate kinematic data within a PostGIS trajectory [closed]
I have a number of glider flight tracks recorded in GPX format and I would like to extract kinematic data such as instantaneous vertical velocity for charting and further analysis.
There's plenty of ...
- 315
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How do I animate paths from points using temporal controller on QGIS, or in other words, connect points from a user with a line that changes w time
I want to animate people moving using temporal controller. I have a dataset that shows people's locations on a particular day, and these locations are points. I, however, want the points for each ...
- 21
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Counting telemetry intersections with a polygon in R
I am currently tracking animals in national parks and have lat/long and date/time data for individuals and a polygon shapefile for the park boundary. I want to know how many times individuals leave ...
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Transforming a linestring table to trajectories on the fly
I have the following code:
tracks AS
(SELECT
imei,
st_setsrid(ST_MakeLine(points_geom ORDER BY time_created),4326) AS track from
subset_cr
GROUP BY imei
)
Is there any way I can ...
- 889
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Trajectory density map or line density map
Data: ships AIS trajectory Data with longitude and latitude. (that data is a CSV file with several columns:id,time,lon,lat,etc.)//
I transform the point to line, every line is a ship trajectory. Now I ...
- 25
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Converting GPS co-ordinates to relative trajectories
I wish to convert GPS co-ordinates of an object (say, a car) to a relative trajectory.
So suppose I'm travelling from A to B, at A I need to know the precise x-y-z co-ordinate from my current point (...
- 49
1
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1
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Ideal procedure to deal with faulty data for generation of LiDAR trajectory [closed]
The reason for this post is to understand possible remedial measures when one is dealing with a lidar dataset that is faulty (incorrectly populated, missing trajectory information etc.). Obviously, re-...
- 165
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Points of tracklog inside a polygon with a re-enter tolerance
I have points in PostGIS that represent GPS coordinates with a timestamp from a tracklog. I'm interested in selecting the times at which the tracklog entered and exited the polygon with a certain ...
- 121
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Clipping common overlapping regions in multiple trajectories
I have 20 trajectories
I found a method on Github https://github.com/wisaaco/MatchGPX. The method's output is shown below. There are two GPS traces one in blue and other in Red.
The overlapping ...
- 11
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Generate synthetic trajectory dataset that has global coverage
I want to generate a spatial trajectory dataset which basically contains tuples - (lat,lon,time), grouped together by an identifier so they form trajectories. In addition, I want this dataset to have ...
- 674
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Is there a measure that account for the the location diversity and trajectory distance of agents?
I am currently working on project to assess the success of musicians. For each musician I know when and where (coordinates,city,county) they performed in a gig. I assume a successful musician is the ...
- 101
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Count number of overlapping map matched GPS trajectories with road network
I map matched a sequence of GPS-points to a road network using the Offline-Map Matching plugin for QGIS. This map matched trajectory passes certain roads segments multiple times (for example, the ...
- 539
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Creating animation of movement along shortest path
In my project I need to find the shortest path between different layer points. I did this using the network analysis shortest path tool for single points and OD-matrix tool with QNEAT 3 Plugin for ...
- 59