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Questions tagged [buffer]

A region enclosing a point, line, or polygon at a specified distance.

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Recreate polylines from polygon buffers in QGIS [closed]

I just started with QGIS. My colleague (who is experienced in ArcGIS) and I are trying to match one dataset to another. The orginal data consists of polylines each with an unique registration number. ...
Jurre's user avatar
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33 views

Create distance buffer for virtual layer with categorized symbology QGIS 3.34

I want to create a virtual layer with a fixed buffer distance e.g. 1000 m from a buliding layer as input. The building layer contains information about its use in colum X of its attribute table. The ...
Kevin_S2021's user avatar
2 votes
1 answer
56 views

"Buffering" raster category of raster layer in QGIS

In this raster with 300m resolution, I would like to increase the size of one category (1), creating an (approximately) 1km buffer increase. In other words: I would like to expand the borders of ...
Ana Clara's user avatar
-1 votes
1 answer
52 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 ...
Rafaela Zylali's user avatar
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28 views

Buffering Streams based on adjacent slope using ArcGIS Pro

Elements: Working with ArcGIS Pro 3.2.2 Line feature Class; NHD Stream Network 30mx30m raster; Slope calculated from DEM I have a stream network that needs a variable buffer. The buffer width ...
Jim Richalds's user avatar
1 vote
0 answers
24 views

QGIS - SQLite trigger to create buffer but with a non-overlaping clause

I'm using an SQLite trigger to add a buffer around another "POINT" layer based on entered values. The buffers are being correctly added, but I'm encountering difficulty in preventing them ...
Giene's user avatar
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1 answer
32 views

Buffering with a barrier in ArcGIS Pro?

Not sure if this is possible but I'm looking to buffer streets (black lines) and I want the buffer to stop at the edge of these parcels (pink). Is this possible?
gisgirl578's user avatar
5 votes
1 answer
221 views

Making buffer around crossing point on lines intersection in QGIS

I have two line layers A and B. I need to create a point at the intersection of these layers (which is not a science using "Line intersection"). Is there a possibility to draw a new one on ...
sttipa's user avatar
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Variable buffer at defined z slope to DEM in QGIS

I am trying to introduce some basic grading tools to my QGIS workflow that would otherwise have to be done in Civil3D by another person. The basic idea is to take a polygon and buffer its vertices at ...
Ivan Heitmann's user avatar
0 votes
2 answers
60 views

Creating rings with buffer as polygon in QGIS [duplicate]

I need to draw circles with a buffer in one view. It will be an area around cities. I think it can be solved with a buffer or a cutout from the circle. How can I do this?
Marek Drličiak's user avatar
3 votes
1 answer
85 views

QGIS buffer concave at the front and rounded at the back

I have point layer, where points are grouped into groups - every feature has point_id and group_id. I want to generate around group of point buffer (for example 1500 meters) where front of points ...
Rii Pii's user avatar
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1 answer
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Seeing how far you can travel by road using QGIS [duplicate]

I have 2 layers, one with roads of an area, and other with shops of the area. What I want to do is to produce a map which could show the roads that are 100m within the shops. Note that what I want is ...
Denis Rusis's user avatar
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0 answers
71 views

Buffer around outer edge of polygon

I'm working in QGIS. I have a multipolygon layer and I want to create a 1.5 mile buffer around the outer edge of each polygon. The output of the Buffer tool (set to 1.5 miles) doesn't quite reach 1.5 ...
csft306's user avatar
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0 answers
31 views

Deleting all adjacent small road lines perpendicular to buffer using ArcGIS Pro

I am using ArcGIS Pro 3.1.2. I clipped all road lines inside a buffer. However, some small adjacent road segments are within the network. Is there a tool or option that can get rid of this small part ...
GIS Noh's user avatar
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85 views

How to infer the cordinate system dynamically from a wkt point, for create buffers?

What about if you have a multiple point of the world? How can infer the cordinate system dynamically from a place in Python, for example Mexico, Brazil, Chile, Canada, etc.? The goal is to create a ...
Cristián Vargas Acevedo's user avatar
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0 answers
18 views

Pairwse Buffer using table of values

I'm trying to use a list of items that reference a distance to then use in a buffer. I'm having a hard time getting the table to work. I'm trying to create a drop down so they'd select Item1 and it ...
Davec433's user avatar
1 vote
1 answer
45 views

Feature disappears when setting a buffer to a drawn feature with turf.js in OpenLayers

As shown in the code posted below, I am using turf.js to buffer a geometry. The code below shows the steps I took to do the geometry buffering. In the following step: const asOLGeom = ...
Amr's user avatar
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1 vote
1 answer
42 views

How to buffer a selected point in PyQGIS

I have a few random points that I generated within a polygon. I randomly selected one of the points and would like to buffer that point. In the case below, buffering will be applied to all points and ...
seak23's user avatar
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0 votes
1 answer
35 views

Surfer Grid Contour - Inserting a buffer (river) to contours?

Using Surfer, I am making contours using a grid. I have a river running through my extent, that I need the contours to not cross over. How can I create this buffer? I can add a shapefile of the river ...
Maggie Perry's user avatar
3 votes
1 answer
238 views

Creating a one sided buffer in QGIS

I want a 3km buffer from a coastline but only on the seaward side. How would I accomplish this? I tried using difference but it didn't work I initially got a geometry error which I fixed and still no ...
Lane Simkin's user avatar
0 votes
1 answer
56 views

Generating polygons with a target area from points using st_buffer

I have some point geometries which I want to turn into polygons using st_buffer. For each point I have a target area that the resulting polygon should have. Here's an example using R: library(sf) # ...
karpfen's user avatar
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Area of intersection between two polygons: TopologyException: Input geom 0 is invalid

I am trying to compute the area of the intersection of two polygons as follows: inter = geomap_ilot.sjoin(df_final_quartiers_arrond) def f(frame): """A function to calculate ...
bravopapa's user avatar
  • 475
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0 answers
98 views

Fixing Error 1 "side location conflict" using clip raster by mask layer

I use QGIS version 3.34.3 and Windows 10. what I did so far: I downloaded the data from COSMOS Europe here: https://doi.tereno.net/landingpage/doi/https%3A%2F%2Fapi.datacite.org%2Fdois%2F10.34731%...
Jules's user avatar
  • 9
2 votes
1 answer
122 views

Generating centerline of a polygon feature, extending line feature - ArcGIS Pro

I am attempting to generate centerlines of polygon features using Polygon to Centerline in ArcGIS Pro. My goal in this effort is to create a straight line directly through the center of the feature. I ...
anthro_01's user avatar
0 votes
0 answers
25 views

Get rid of points that are over 500m from previous time point

I have gps data from animals over time. The collars recorded the location of the animal every 15 minutes, but there are some funky points that are obviously an error as the animal could not have moved ...
Alex 's user avatar
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0 votes
1 answer
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Why the buffer geometry column in the GeoDataFrame is in point form although it's actually in polygon form?

I wanted to create a 1.5km buffer for each geocoded point. Here's the screenshot of the geocoded points dataframe. So I overwrote the geometry column using the code below: shopping_centres['geom'] = ...
mfirdaus_96's user avatar
0 votes
1 answer
74 views

PyQGIS layer action: Add buffer from clicked-on feature as temporary layer using materialize

In the workshop material "QGIS Automation using Actions", the first example "1.1 Extract a Feature from a Layer" demonstrates how one can extract any country polygon by clicking on ...
ebcs's user avatar
  • 49
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0 answers
56 views

Choosing projection for buffering polygons

I'm working with an application that needs to manages (lat lon) polygons all over the globe. For some reasons i need sometimes to do some operations like buffering, for more convenience, I would like ...
Magic Mushroom's user avatar
3 votes
2 answers
87 views

QGIS Single sided buffer value of specific area and line length on 90 degrees lines

I need to Single Sided Buffer a specific surface based on a line length, on QGIS. Example: line length: 60.367 meters. area needed from single sided buffer: 452.4 square meters. theoretic Single ...
Marin Marian's user avatar
0 votes
0 answers
26 views

Buffer set of lines in meters that span the entire USA [duplicate]

I imported a shapefile with lines that span the USA. The CRS comes in as EPSG:4326-WGS84. I want to buffer all the lines by 600 meters. The Buffer tool suggests reprojecting since only degree unit ...
user2776946's user avatar
2 votes
1 answer
136 views

Calculating percentage of landuse type within buffer using Python [closed]

I have two polygon shapefiles: buffers and landuse types. I want to calculate the percentage of each landuse type within the respective buffer. The problem is that the landuse type polygons are bigger ...
Lina's user avatar
  • 233
1 vote
0 answers
57 views

Python toolbox in ArcGIS Pro for buffer distance

I am currently to make a Python toolbox in ArcGIS Pro to search and count for tourist attraction/activities that I can decide at some distance to at least two infrastructure facilities, and also using ...
Mathias's user avatar
  • 11
2 votes
2 answers
184 views

Fixing holes in the buffered polygon using PyQGIS

My script uses a buffer and dissolves to create polygons around my points. However, there are holes in between the points. I do not want to increase the distance because then it will also cover the ...
charliey's user avatar
  • 163
3 votes
1 answer
153 views

live ellipses around points in QGIS with orginal point still there?

First of all I have found these: Is there a way to have a 'live' buffer in QGIS and How to add a buffer in QGIS that updates itself for creating a buffer which is updating itself when I move ...
BAE_23's user avatar
  • 677
1 vote
1 answer
56 views

Buffering line segments that intersect another segment using a specific field value

I am using ArcGIS Pro 3.2 with an Advanced level license. I have a field (Fish) that scribes whether a stream has fish (dark blue - 100 ft buffer) or no fish(light blue- 35 ft buffer for 500ft ...
ZephyrZ's user avatar
  • 87
1 vote
1 answer
173 views

Buffer/expand point contained inside another polygon

I have a point at one corner of a square. I want to buffer that point with a specified size, but I don't want the buffer to extend beyond the boundary of the polygon behind it. The buffer should ...
Lars Anders Myklebust's user avatar
1 vote
1 answer
65 views

How to merge sample points that are within a certain distance of each other and calculate mean attributes values for merged points in QGIS?

I have a data set like the following in .csv: sample latitude longitude variable1 variable2 variable3 A 37.18 -115.85 1 0 0 B 37.18 -115.85 1 0 0 C 37.18 -115.85 1 0 0 D 39.44 -117.66 0 1 0 E 39....
goshawk's user avatar
  • 53
0 votes
0 answers
34 views

Change wedge buffers from arcs to slices

I recently updated QGIS to 3.34.0 from 3.22.5 and noticed the program renders wedge buffers differently from what I'm used to. They appear as arcs around a point such as Instead of as slices of a pie ...
Nadka's user avatar
  • 51
6 votes
3 answers
367 views

Labeling count points within dissolved buffers in QGIS

I am using the following expression to visualize with a buffer, the nearest neighbors at a given distance: case when distance( $geometry, array_get( overlay_nearest( layer:=@layer, ...
Ingrid Ingravida's user avatar
0 votes
0 answers
19 views

Buffer: shape_Area=0

I used the GPX to feature tool to add data points to my map. I draw buffers with a different radius around each point >10 m (some of them overlap). However, the column shape_Area is 0 for all the ...
Daniela's user avatar
0 votes
0 answers
47 views

Trouble with Buffers using EPSG:5070 QGIS

I've been trying to create a buffer layer around point sources in QGIS. I'm using the EPSG:5070 co-ordinate system, everything I input is in this system, including the base project. I've tried ...
Reuben Dixon's user avatar
11 votes
2 answers
296 views

Creating buffers to closest distances with two categories in QGIS

I would like to develop an expression that does the following nearest-neighbour analysis: From a layer of points 'point_layer', I would like to calculate for each point the distance to the nearest ...
Ingrid Ingravida's user avatar
0 votes
0 answers
47 views

Create a buffer on a single LAS file using lidR

I want to create a buffer for a single LAS file in order to test different algorithims for DTM creation on a small scale before scaling up to all my files using LAScatalog. I know LAScatalog creates a ...
Walshe_d's user avatar
  • 729
0 votes
0 answers
56 views

RuntimeError: Illegal values for buffer size?

Does anyone know what this "RuntimeError: Illegal values for buffer size" error is? I am running gdal2tiles.py on a geoTIFF. Below is the message in my terminal. I don't know if the buffer ...
lizo1122's user avatar
3 votes
1 answer
150 views

Creating buffer for MultiPolygon that covers all its surroundings in QGIS

When I try to use the Buffer tool in QGIS, it only allows me to create buffers in degrees ("grados" in the screenshot below) and it does not give me the option of changing the units (to ...
Felicia's user avatar
  • 31
0 votes
1 answer
364 views

Buffers around linestrings have weird shapes (sf in R)

Update 10.11.23 Question (1) has been resolved, but answering question (2) is still in progress. Original Post I am trying to create buffers around (multi)linestrings representing international land ...
jccborders's user avatar
1 vote
1 answer
66 views

Aggregation of buffers from polygons

I need to make a buffer from the polygon layer with a specific value in the A field, such as from the X value, for example from the value X. The buffer must be of radius 50m and I need to get an ...
Łukasz Maćkiewicz's user avatar
0 votes
0 answers
64 views

Identifying near continuous line features in a broken network

I have a line dataset which contains thousands of records, the network isn't continuous and it is broken in many locations. The aim is to find potential routes which are continuous in long sections, ...
ohh_danielson's user avatar
1 vote
2 answers
189 views

How to calculate the average elevation within a certain radius around a grid cell and apply the average to the grid cell in QGIS?

I have two layers in QGIS: a raster layer containing elevation, and a grid cell layer (polygon) containing 1km by 1km squares. I am trying to create a new layer where the elevation of each 1km by 1km ...
p1unge's user avatar
  • 109
2 votes
2 answers
96 views

How to prevent duplicates from being generated in Spatial Join in PostGIS

I'm trying to create a spatial view which meets the following criteria: Sentinel hotspots registered within 2km of powerline (feeder) AND QRFS point located within 4km radius of sentinel hotspots AND ...
Fezter's user avatar
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