Questions tagged [azimuth]

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

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1answer
47 views

Determining azimuth of continuous polyline segment

I have a polyline which represent the river bank of a particular section of a river drawn based on Satellite imagery. As you can see in the picture, it is drawn in red color. I have also a vertices ...
4
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1answer
49 views

Sentinel-1a real azimuth resolution

I was exploring this satellite's payload characteristics on ESA's website and I saw that it's azimuth resolution varies a lot. For example azimuth resolution for IW mode is 22m (https://sentinel.esa....
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1answer
65 views

Calculating azimuth between 2 points

I have been trying to use the azimuth expression function editor between 2 points. However, I am not getting it to work. I am obviously misunderstanding how to create the expression itself. This is ...
3
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2answers
108 views

Calculating azimuth values relatively along line for its segments using PostGIS

I'm trying to make this calculation in SQL with PostGIS: azimuth_1 + (Sum rel_azimuth_2 to rel_azimuth_7) rel_azimuth_x is always the angle beetween the actual subsegment_x and one subsegment_x-1 ...
2
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1answer
69 views

Calculating azimuth values along line for its segments using PostGIS [closed]

How can I calculate the azimuths along a line on its segments ? Is there a function in PostGIS for this? I want to calculate the min, max, sum and avg value of the azimuths for each segment.
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37 views

Calculate per pixel Landsat Relative Azimuth Angle (RAA)

Iam Trying to Generate Landsat-8/OLI NBAR images. Given that USGS Landsat-8 Angtool can generate per pixel view_zenith, view_azimuth, sun_zenith and sun_azimuth angle bands. Is Relative Azimuth Angle ...
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0answers
79 views

Calculate per pixel Sentinel-2 Solar and Sensor Angle Views

I am working with Sentinel-2 images and would like to generate per pixel angle bands (view_zenith, view_azimuth, sun_zenith and sun_azimuth). Considering Sentinel-2 SAFE structure, I found that ...
3
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0answers
70 views

Calculate weighted azimuth/bearing of a line

Given the line LINESTRING(-9.086532643219698 -7.939337106873815,-1.396102955719698 -0.9775148048290135,-0.780868580719698 -0.7138718839794582,-0.077743580719698 -0.6699297767574899,0.581436106780302 ...
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24 views

Calculating Satellite Azimuth from Landsat WRS data?

I found the below answer in regards to how one identifies the satellite azimuth from Landsat Images, but am not sure how you translate the path/row into azimuth angle. I have searched for such, but am ...
3
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1answer
52 views

Find the side of a polygon pointed by an azimuth

I have a dataset of points (longitude, latitude) and I used QGIS get a Voronoi diagram of these points. Each point has an azimuth and a wedge width that I also managed to visualize in QGIS. As you ...
2
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0answers
45 views

Find orientation of rectangle in PostGIS for QGIS composer

I am storing rectangle in my DB in order to automatize the creation of technical maps of a networks. I am creating these maps in QGIS using the print composer. Many of these rectangles are oriented (...
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0answers
172 views

Calculating azimuth of direction in OpenLayers? [closed]

I am developing an application with OpenLayers and I need to calculate the angle between two segments or directions. I thought about getting the azimuth of those segments and then calculate the ...
0
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1answer
225 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
115 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 ...
2
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2answers
224 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 ...
1
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1answer
96 views

Calculating azimuth for shortest line from point to polyline in QGIS

How can I calculate the azimuth for the shortest line from a point (start) to a polyline (end) in QGIS? NNJoin calculates only the distance and joins the attribute from the line to the point ...
2
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0answers
118 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
143 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 ...
2
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1answer
652 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.)
1
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1answer
223 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 ...
2
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1answer
125 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
158 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
136 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 ...
2
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2answers
451 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
681 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 ...
2
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1answer
96 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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129 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 ...
7
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1answer
3k 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 ...
2
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1answer
418 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
1k 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 ...
3
votes
1answer
69 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 ...
2
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1answer
1k 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 ...
6
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1answer
318 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
250 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, ...
2
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1answer
47 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 ...
6
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3answers
1k 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
122 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
292 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 ...
4
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2answers
644 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 ...
4
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2answers
418 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
295 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
730 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
930 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
304 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, '...
2
votes
1answer
648 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
1k 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
36 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 ...
-3
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1answer
72 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 ...
0
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1answer
628 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 ...
2
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0answers
132 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,...