Questions tagged [buffer]
A region enclosing a point, line, or polygon at a specified distance.
302
questions with no upvoted or accepted answers
6
votes
0
answers
76
views
Adding raster value with specific equation using ArcMap
I am trying to develop a raster layer with the interference of streetlight in this example:
As you can see, there are multiple buffer rings around a point layer. I actually want to transform this ...
- 73
6
votes
0
answers
89
views
Creating Raster that sums up input polygons using QGIS?
I am using QGIS and I have a shapefile with buildings. From these buildings, I have made a Buffer with variegating radius. The Buffer also have data about the demand for Parking spots for each ...
- 61
5
votes
0
answers
152
views
How to use the output of one run as input to the next in QGIS batch processing?
I'm trying to do a series of buffers using the processing batch interface, and I want to use the output of the first run as the input to the second (and so on). But I can only pick an existing file or ...
- 82.2k
4
votes
2
answers
3k
views
Combining ST Buffer and Intersect with Where clause
I'm trying to create a buffer around a single point in a spatial entity and finding all the points from a different entity that fall within that buffer.
I tried two approaches. The code below runs ...
- 41
4
votes
0
answers
285
views
Drawing "proportional" buffer using QGIS or GRASS?
I'm working on aquatic vegetation and have a shapefile representing floating vegetation in a lake. By some studies, we know that submerged vegetation extends for a certain extension based on floating ...
- 41
4
votes
0
answers
503
views
How to Simulate Venn Diagram of Buffers using QGIS?
For the sake of simplicity, suppose I have only 2 points on one layer. Point A have population of 100, and point B have population of 150. I do find buffer of these 2 points and it is intersect. I ...
- 141
4
votes
0
answers
387
views
How to use buffer() in QGIS Value Relation field
When adding a point, I'd like to auto-populate one of its fields (the street address) setting it to a field in the nearest point in another layer (a layer containing all existing addresses).
It ...
- 41
4
votes
0
answers
548
views
Large buffers in PostGIS (5000 km radius)
I have a number of points stored as geographies in PostGIS (version 2.0.1), and I'd like to create rather large buffers around them (with a radius of 5000+ km).
However, ST_Buffer doesn't handle this ...
- 141
3
votes
1
answer
158
views
Creating a buffer that tapers in thickness in GeoPandas
I'm currently working on a project involving creating an isochrone map of historical water travel. At the moment, I have a geodataframe containing a starting point on the river, a multipoint of the ...
- 31
3
votes
1
answer
134
views
For loop to buffer shapefile at multiple distances, add each to the layers window, style & save to geopackage; PyQGIS
Can someone help me straighten this code out. I want to create three buffers, at 100, 250 and 500m respectively and add these to the contents table. I've tried creating a for loop but not having ...
- 480
3
votes
0
answers
185
views
Distance buffer from point, with obstacles
In QGIS is there a tool or technique that would draw a fixed distance buffer from a point, taking into account obstacles in the buffer field?
I want to illustrate the maximum distance a ship can ...
- 431
3
votes
0
answers
82
views
Turn disjoint polygons into tessellation
I have a set of points that have labels. These labels represent geographies; however, some of the labels are wrong. Like in the picture below
So after running some analysis, I end up with a set of ...
- 131
3
votes
0
answers
53
views
What is the name of the popular buffer algorithm?
There is a well-known algorithm that I believe is used for the "buffer" function in some GIS libraries and applications. I have a vivid memory of reading the paper that describes the algorithm and ...
- 133
3
votes
0
answers
577
views
How to apply a rectangular buffer on spatial polygons in R/qGIS
I am trying to find a way to apply a rectangular buffer on my spatial polygon dataframe in R. At the end, I would like to be able to shrink my polygons by specified units on both sides. So far, I have ...
- 127
3
votes
1
answer
1k
views
QGIS Buffer Not Recognizing All Features in Layer
I'm completing online course GST 101 for QGIS (my version is 2.18.3) and I'm stuck on the Buffer tool.
All of my layers are set to CRS "NAD83(HARN)/New Mexico Central (ftUS) (EPSG:2903)" as ...
- 31