Questions tagged [azimuth]
An azimuth is "a [particular kind of] angular measurement in a spherical coordinate system."
80
questions
2
votes
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
votes
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....
1
vote
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
votes
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
votes
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.
0
votes
0answers
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 ...
0
votes
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
votes
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 ...
1
vote
0answers
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
votes
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
votes
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 (...
1
vote
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
votes
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), ...
1
vote
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
votes
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
vote
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
votes
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 ...
1
vote
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
votes
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
vote
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
votes
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 ...
0
votes
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
votes
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
votes
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 ...
0
votes
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
votes
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
...
0
votes
0answers
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
votes
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
votes
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 ...
5
votes
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
votes
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
votes
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
votes
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
votes
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
votes
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 ...
1
vote
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 ...
1
vote
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
votes
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
votes
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 ...
1
vote
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
votes
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
votes
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 ...
1
vote
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
votes
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 ...
1
vote
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
votes
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
votes
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
votes
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,...
