All Questions
38
questions
0
votes
0
answers
52
views
Difference of circle buffer area to calculated area in QGIS
When I create a circular buffer around a point feature in QGIS 3.36.3-Maidenhead in EPSG:25832 of a 10 km radius with 1000 segments I get 313961275.193 m² as a result. I calculate the area by typing $...
- 49
-1
votes
1
answer
56
views
MULTI RING BUFFER VECTOR LAYER TO RASTER [closed]
I have a line vector file in qgis in which I run the multi-ring buffer command to divide the area into 200m zones from the river because I want to make a flood hazard map.
So I have a multi ring ...
1
vote
1
answer
593
views
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 ...
- 35
2
votes
1
answer
72
views
Randomly sample points within polygons
I am working in QGIS 3.24.0. I have 200 vector layers in the form of circular buffers (same size, different extent) and a single layer of points (n=1,000 or so) contained within those buffers. 2 of ...
- 29
4
votes
1
answer
226
views
QGIS: Min & max buffer to cover features in another layer
I'm working with buildings in QGIS (vector polygons) and have two layers - call them a "source" building and multiple "sink" buildings (in second layer). How would I go about ...
- 51
2
votes
1
answer
185
views
Automatically update Buffer Layer
I have recently started working with QGIS. Quite new to this software.
Anyway, my first task is to create contours from shapefiles using buffers, unions and dissolve functions. This shapefiles are ...
- 61
1
vote
1
answer
2k
views
Geoprocessing buffer "." files are not supported for this algorithm
I am trying to buffer a layer which worked earlier. I recieve, The "." files are not supported for this algorithm
Other tools give me the same error along with Fix Geometries, Reproject ...
- 33
15
votes
2
answers
812
views
Creating equally split buffers between points in QGIS
I want to create buffers for every health facility, but they end up overlapping.
How can I create buffers that split equally between the distance of 2 health facilities?
Example of the result wanted ...
- 407
3
votes
2
answers
200
views
Using buffers in Point Sampling Tool
I have 50m (shape file) buffers around (shape file) data points. I have another layer with the raster of the vegetation (indicated by different colours) in that land. I can easily extract the raster ...
3
votes
2
answers
1k
views
Creating buffer (of line geometry) around polygon feature using QGIS
I have a polygon layer representing coastal cliffs and would like to create a line at a certain distance out to sea from this polygon layer (I drew a blue line on the image below to demonstrate).
In ...
- 841
6
votes
3
answers
1k
views
Calculating buffer distance for different groups of parallel lines in QGIS
I have a number of parallel lines (see here for the background: How to extend lines to Bounding Box in QGIS?). My final aim is to create the Centerline for each group of lines as illustrated here:
...
- 537
6
votes
1
answer
156
views
Batch create multiple buffers with variable size around point
For a statistical analysis, I need to calculate some landscape properties in several (rectangular) sample areas, which vary in size (extent ranging from 10 by 10 to 500 by 500). These sample areas are ...
- 61
0
votes
2
answers
445
views
Processing tool window doesn't appear in QGIS
I'm encountering a strange problem: I cannot execute any tools in QGIS (e.g., buffer, join--literally everything anything in the Vector or Raster menus. This seems to apply to all tools in all plug-...
- 11
0
votes
0
answers
31
views
Specifying a variable in ArcMap output if this is not present in the input
I have been using ArcMap 10.6 (working from within a .gdb, with vector files) to buffer selected variables from a number of files (classes of water, buildings, roads and a constructed other for the ...
- 623
1
vote
1
answer
840
views
Calculate area with a buffer
I have two layers, a set of households and burned area (vector data). I created buffer zones around each household and now want to estimate the burned area within a buffer. Unfortunately "...
- 11