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Questions tagged [radius]

a line segment that connects any point of a circle (or sphere) and its center.

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qgis2map not showing the assigned symbology

I have a basic heatmap created from point vector, but when I use qgis2web to send to my supervisor, the radius of the points is altered. This is my first time using this plugin, and cannot find ...
Aagwood's user avatar
  • 99
1 vote
1 answer

Creating radial lines from center of polygon to edge in QGIS

I have a set of polygons for which I need 16 radial lines each from the centroid of the polygon to the edge (see image). So far I have only found a python script to create radial points for a circle (...
Denise's user avatar
  • 91
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1 answer

R Leaflet map: set minimum radius size

I have an R Leaflet map showing cicles to mark the locations of industrial facilities. Some of these facilities have been assigned a risk score in the data ("RSEI_Score"), and others not (...
Brian Holmes's user avatar
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Changing value of raster within set radius

I have a raster map of an aquifer. I want to alter it so that the water level changes around a point(an active pump). What i need is a way to select a radius on my raster and lower the Z value within ...
Algae's user avatar
  • 1
1 vote
1 answer

Select points based on their date & their location (they fall within a radius of another point)

I am studying lions, and their kill sites. I currently have around 900 historic kill site locations with the record date (with some attribute info). The data is old and I am looking to confirm the ...
Robert Le Brun's user avatar
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How to make buffers based off of Manhattan Distance rather than Euclidean distance

I have buffers which need a 1.6 mile radius. However, I want them to be radii for walking distances rather than Euclidean distance to more accurately reflect the data I'm working with. Is this ...
aSquaredRush's user avatar
-1 votes
1 answer

Calculate the average "radius" of a polygon in ArcGIS Pro

I am trying to calculate the average radius of RF coverage propagations. Each propagation looks almost like a paint splatter for visual reference. I want to calculate the average radius across all of ...
Noah P's user avatar
  • 59
1 vote
1 answer

How can I found all db table records within radius JSON field in PostGIS database

I have table polygon_versions with geo_json field of type json. DB fiddle: How can I select all table polygon_versions records within radius of 20 kilometers from geometry ...
Taras's user avatar
  • 123
2 votes
1 answer

PostGIS ST_PointInsideCircle radius units config

I have a table with a lat and a long float columns and I'm trying to use the ST_PointInsideCircle PostGIS method which is working but the radius I enter is not in the correct units. I'm trying to ...
ab_dev _j's user avatar
1 vote
1 answer

How do I calculate population within radius on Google Earth Engine?

I'm trying to calculate the population within a specific radius within a specific country using Google Earth Engine. My plan is to use reduceToVectors to convert the population values into a ...
geor4nge's user avatar
1 vote
1 answer

How would I calculate the sum of the values of a band around a specific pixel in Google Earth Engine?

I'm trying to calculate the population within a certain radius around a specific pixel, but I don't know how to define the geometry of the region to reduce. This is what I would imagine it might look ...
geor4nge's user avatar
1 vote
1 answer

Extract Raster Value around point on QGIS

I'm using QGIS and I'm triyng to extract raster values around some points that were created from a .csv file. I already could extract the raster values in each point but each point represents an ...
João Morais's user avatar
2 votes
2 answers

QGIS : EPSG4326 : arc of circle with X radius centred in Z (aviation)

I am trying to make a polygon from the aviation LPPO FIR (Santa Maria Oceanic Flight Information Region), that some portion is described as "arc of circle with 100NM radius centred at PST NDB (...
domiho1's user avatar
  • 33
2 votes
1 answer

How to count features within a radius distance?

I use QGIS and I have building polygons like this: and I would like to calculate the number of polygons within a certain radius (100m for example) for each building to evaluate how dense is the area ...
Ricardo Gomes's user avatar
5 votes
3 answers

Creating circle around point with specific radius taken from column in QGIS [duplicate]

I have a shapefile of points (SR EPSG:3857 - WGS 84), with (in the attributes) an "ID" column for each point, and a "radius" length in meters; I am trying to find a way to create a ...
LT17's user avatar
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1 vote
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SAGA Majority Filter - what is radius?

In QGIS, Saga's majority filter has only a few parameters: the raster, search cell type, and the radius. I thought it uses a kernel or moving window, so my question is what does the radius refer to? I ...
hmnoidk's user avatar
  • 707
3 votes
2 answers

Creating circle polygon of certain radius around points in QGIS

I have a point layer in QGIS in EPSG:4326 and want to create polygon-circles of 10m radius around each point. All of the points are located within a kilometer² in northern Germany. How do I do this? ...
Chris's user avatar
  • 31