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Questions tagged [azimuth]

An azimuth is "a [particular kind of] angular measurement in a spherical coordinate system."

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89 views

QGIS - tool to plot polygon from point with known bearings and distances

Is there a tool that can convert a point dataset to a polygon based on some known parameters. We will have 1- x,y Azimuth 3.Distances in m for a- point in the direction of 2 (the azimuth) (200m), ...
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1answer
35 views

Using Click locations to determine azimuth in QGIS 3

I am using QGIS 3 64bit. While adding points to a shapefile (layer), what expression captures the insertion point coordinates of a point feature to use as a start point for an azimuth determination ...
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2answers
126 views

Azimuth calculation from One to Many Points in PostGIS

I have vector data of 3D City Model in PostgreSQL database. So from my data geometry column, which is a surface geometry. (These are geometries of all the surfaces of buildings). I had extracted the ...
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1answer
51 views

How to calculate the azimuth for the shortest line from a point (start) to a polyline (end) - NNJoin

How can I calculate the azimuth for the shortest line from a point (start) to a polyline (end) - NNJoin calculate only the distance and join the attribute from the line to the point attributes. Does ...
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0answers
51 views

How to find coordinates of a triangle with azimuth?

I am just starting out in GIS and it's been a long time since I took math in university. I am teaching myself through a textbook but there are a few questions I am stumped on. Essentially I have a ...
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0answers
135 views

Attributing polygons based on line attributes

I'm using QGIS 2.18. I have a grid that I need to calculate Azimuth and length for each side. Most have 4 sides but some ( see Gird C below) many more , up to 12. My process now convert Polygon to ...
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1answer
256 views

How is ST_Azimuth (in PostGIS) calculated?

What algorithms are internally calculated in PostGIS? Can you explain it with simple code? (I want to know the standard of true north.)
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1answer
131 views

How to iterate through a list of polygons' centroids in QGIS

I'm the new one. I try to calculate the azimuth between a row of polygonsheets to print the number of the last and the next sheet inside the sheet in direction of the last and the next sheet. This ...
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1answer
66 views

Calculating a reverse Azimuth

using QGIS 18.16 I am trying to figure out how to cal a reverse azimuth. Basically the opposite direction. So if i have a azimuth of 163, I subtract 180 which gives me -17. I some how need to write ...
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2answers
101 views

Angle conversion for azimuth angle due east counter clockwise to due south clockwise

Suppose a given azimuth angle is calculated due east counter clockwise (ccw), and I want to convert it to due north clockwise, so I found the following formula, # limit the range to 0..360: r....
2
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1answer
96 views

Azimuth (bearing) changes depending on map/project projection

I'm trying to calculate the initial bearing that is needed for the great circle between 2 points. As an example, let's say from London to New York. There are multiple calculators online and they ...
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2answers
224 views

Azimuth from last point to next point

I found an script on https://community.esri.com/blogs/dan_patterson/2016/09/01/distance-calculations-using-the-field-calculator but the script is giving the azimuth to the next Objectid point and what ...
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1answer
425 views

Using azimuths and bearings in GeographicLib? [closed]

I am currently using the JavaScript port of the geodesic routines from GeographicLib: https://geographiclib.sourceforge.io/html/js/ https://github.com/yurijmikhalevich/node-geographiclib I am ...
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1answer
71 views

angle of incidence calculation

I am calculating angle of incidence by the following formula! cos(aoi) = cos(slp) cos(zn) + sin(slp) sin(zn) cos(azm_s - azm ) aoi: angle of incidence slp: slope zn: zenith angle azm_s: solar ...
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90 views

Azimuth on projected tile map

Here is a very specific problem : I have some mercator flight simulator maps I projected with real coordinates. However, due to game simplification, these maps are not oriented correctly and real ...
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1answer
2k views

Displaying azimuth of line in QGIS? [closed]

I have drawn a series of straight lines on a map joining different locations. The lines have a single vertex at each end. I am using the Ordnance Survey of Great Britain 1936 projection. I now ...
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1answer
242 views

create sectors with given azimuths of one point in QGIS and show tabs info. following each sector direction

if there any way to create some sectors from one point with given azimuths,and show tab information on each sector following sector direction, or when i click the sector, all the information related ...
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4answers
876 views

Programatically add polylines from existing points in QGIS

I am using QGIS 2.18 and I need help finding a python script or tool which will allow me to programmatically draw a line from existing GPS (sometimes as many as 500 or more) points that is 250 feet ...
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1answer
60 views

How to randomly replace a given line vector multiple times within a polygon?

I have this line vector that represents the movement trajectory of a given animal. I would like to randomly replace this vector line within a polygon, multiple times, changing its position and ...
3
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1answer
801 views

Bearing of Two close lines in python

In the picture below I am finding the bearing of two close lines. This is the picture of two complete lines. The brown line might be a bit large from the blue line. Should not be the bearing of these ...
5
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1answer
270 views

Artifacts in gdalwarp output (from polar stereographic to azimuthal equidistant)

I'm trying to warp some GeoTIFF images (from NSIDC), from a polar stereographic projection, to an azimuthal equidistant projection using gdalwarp: gdalwarp -t_srs 'EPSG:102016' \ -te -7000000 -...
2
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1answer
122 views

Generating new point file based on specified distances and azimuths/angles from previous point in ArcMap?

I have a shapefile of multiple points (upwards of 100). I would like to generate a new shapefile with points that are a specified distance and direction away from the previous points. For example, ...
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1answer
37 views

Rotating all features by a single other feature's azimuth

I have a set of CAD drawings all published neatly squared to a page, but not located or rotated to true north. One of the drawings contains some referencing that I can extract and use to then apply to ...
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3answers
716 views

How to create a sector with different azimuths of one point using QGIS?

If I got one point like this: ID longitude latitude azimuth A 113.38107 22.35215 80 A 113.38107 22.35215 180 A 113.38107 22.35215 350 How to use QGIS to create a sector ...
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0answers
103 views

How to use Local Azimuthal projection to convert Local NED to Geodetic LLA?

I'm trying to use Proj4j.EquidistantAzimuthalProjection to get the latitude/longitude of a new location based on its relative distance and bearing to a known location. Here is my source code: import ...
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0answers
203 views

Transforming azimuthal to wgs projection using Python?

I want to plot a circle around a given lat/long with a certain radius on the Earth. The shapefile of the earth has WGS84 coordinate system. First, I projected the circle to azimuthal equidistant map ...
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2answers
494 views

How to compute azimuth between QgsPointV2s?

The QgsPoint class has an azimuth() method but the new QgsPointV2 class does not. What's the best way to compute the azimuth between QgsPointV2s? I couldn't find a convenient way to convert V2 to the ...
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2answers
300 views

How to form a V-Shape field of view from any given point (i.e. latitude longitude)

I want to visualize the V-Shape polygon which can be referred to field of view as well. So, far i have been able to find the latitude and longitude of a certain point when i give an input of latitude ...
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0answers
240 views

Finding Final Point using Azimuth and Distance Plugin

I am new to QGIS, only having used Arc before. I am working for a non-for -profit that is trying to track birds that are viewed from points hiking trails. The GIS intern before me used data on the ...
2
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1answer
565 views

Finding azimuths/bearings between many consecutive points in ArcGIS

I have a ton of consecutive points and I need to know the bearing between each of them (a to b, b to c, c to d,etc). Ultimately, I will convert the numbers (bearings, azimuths?) to directions: N, NE, ...
2
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1answer
764 views

Drawing wind rose with QGIS from PostGIS?

I am working on wind rose data. I have some points on lines (streets) in my Postgres/PostGIS DB. The sample data scenario is: First, I computed street orientation of this line using PostGIS commands ...
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2answers
260 views

How to compute angle of circular buffer' segments around a point in PostGIS?

I have a point feature and using ST_Buffer() command, I created a circular buffer of 200 meters with 3 segments in quarter of the circle around this point: Select ST_Buffer(my_point.geom, 200, '...
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1answer
512 views

How can the gridlines in QGIS be set to be curved lines (neat circles) around polar region (azimuthal projection)?

I am trying to present a map of our polar regions using QGIS software. I am using an azimuthal (polar) projection. I have added a graticule (gridlines) to the map as a background, which are at 10 ...
6
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2answers
828 views

Placing random line segments within polygon?

I would like to generate multiple line segments of a fixed length, a random bearing, and both segment endpoints within the polygon. It's not clear from the example, but it's fine if the segments ...
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0answers
35 views

Create points with planar location data

Slightly confused. I need to add 3 point features to an already created map project (state plane projection). The description given to me about the location of the points is the planar location, so no ...
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1answer
69 views

What website that provide latitude and azimuth of any city or village such as Sofia [closed]

What website that provide latitude and azimuth of any City or Village such as Sofia? It would be nice to have general list for commonly used translation of latitude and longitude as well as azimuths ...
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1answer
487 views

Cut a linear feature according to the directions or azimuths

I have a shapefile linear that contains a single items as in the image and I want to divide it into several section respecting the azimuth and the line direction. i have this code : import os ...
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0answers
112 views

Why azimuth result is wrong for this pyqgis code?

In this code I want to obtain azimuth from a single point to each pixel center, but when run it, in raster created azimuth result for each pixel is wrong, what is correct code? from osgeo import gdal,...
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1answer
551 views

azimuth and distance from various functions in qgis

I am comparing the various ways of calculating distance and azimuth between two points with Qgis. I am struggling with the various results and their interpretation. I need to calculate a loxodromic ...
2
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1answer
173 views

How to create azimuth raster layer by pyqgis?

I want to create an azimuth raster layer base of single point shapefile, for this I write below code that create a memory point layer that each point in memory layer is center of each pixel and have a ...
5
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2answers
386 views

How to speed up this script in PyQGIS?

I am a new in PyQGIS, I want to create a Point layer from a raster layer. In table of point layer created, there is 3 fields by name of "X_coord", "Y_coord" and "Azimuth", each point in Point layer ...
2
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1answer
393 views

About geodesic or azimuth and UTM and Google Mercator projections

I need to calculate to azimuth between two points. I'm using Projnet and GeographicLib to get the azimuth. So I have a UTM projection map then I need Projnet to get Lat/Lon coordinates because ...
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1answer
548 views

Azimuth greater than 360 in Veloview (Velodyne 32)?

When I use Veloview, freezes at 1 of the frames and examine the data points, why are the azimuths greater than 360 degrees?
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0answers
181 views

How to get azimuth and altitude from a 3D surface in PostGIS?

I would like to know the azimuth and tilt of a polygon / surface in a PostGIS database. The azimuth should be given e.g. from 0° to 360° degrees. The altitude should be between 0° to 90°. An example ...
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1answer
558 views

How to Move points according to distance and azimuth? [duplicate]

How to Move points according to distance and azimuth ?
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2answers
611 views

Visualizing updating lines of bearing from 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 ...
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2answers
3k views

How to calculate azimuth in QGIS field calculator?

Is there any way to calculate the azimuth of two points in the QGIS field calculator? The coordinates are stored in an attribute table. x1 | y1 | x2 | y2
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0answers
161 views

Finding angle to north on image with three control points

So I am working on some software that geolocates spots on a map taken from a drone. I am having some trouble with the actual geolocation when the map that the program is given is not aligned north. ...
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0answers
150 views

Make a line from a set of GPS points close to a specific GPS point with PostGIS

I have to develop a map-matching algorithm. At the moment I only match GPS points with the closest road segment. I'm looking for a way to compare the directions between a GPS point and a road to ...
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3answers
1k views

QGIS Azimuth and Distance plugin length issue

Relative newbie to QGIS and trying to figure out exactly what I'm doing wrong. A couple days ago I had azimuth and distance working perfectly. I was using it in a different project with different ...