Questions tagged [buffer]

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

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40 views

Analysing landuse data in a buffer layer

In my project I want to analyse the landuse around some points within a certain radius. So I created a buffer around my points but I have no idea how QGIS could probably tell me what different ...
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1answer
38 views

Buffer units in Geographic Information Systems

Why the unit of buffer is in meter? Or by default they are found as meters?
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1answer
330 views

Using MMQGIS to create accurate buffers?

I have read in several places that the best way to create a buffer around a vector point is using the MMQGIS plugin. I want to create buffers in London locations within a few metres of each other ...
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0answers
50 views

Achieving the opposite of the shortest_line() function in QGIS?

I currently use the Geometry Generator styling on a point layer to draw the intersection between protection buffers around tree points and another polygon (say a building footprint) using the ...
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1answer
50 views

QGIS draw custom polygon buffer [closed]

I'd like to create custom buffers in QGIS. Each buffer will surround a point. The buffers don't overlap. And each buffer has to have two constants: There is a 50m radius space around the point which ...
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4answers
880 views

Buffering only sides of polygons in QGIS?

My goal is to create a buffer from a polygon. But the edges are the problem. I can't really explain it in words, so I will post a screenshot. That's the way I want it to look. So the goal is, that the ...
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1answer
204 views

Creating buffer around features using GeoTools?

I want to develop a simple GIS application using GeoTools. I have looked at the tutorials but i could get to much meaningful from them. I have a simple JMapFrame to which add can add a featureLayer ...
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1answer
157 views

Creating unique buffer for each set of points separately and in one procedure using QGIS?

How could I create a buffer for each set of points (colour group) separately and in one procedure in QGIS 3? The image below shows a subset of points for buffering.
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1answer
28 views

Using “Difference” geoprocessing tool on Big Data taking a very long time

I am using QGIS Bonn 3.2.3. I've recently been using the Difference function to calculate a list of points and it is taking a terribly long time. I was wondering if you could point out any obvious ...
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1answer
258 views

Create a buffer around points

This is probably one of the simplest GIS tasks to do, but I am struggling. I have tried to adapt this answer but it appears not to work Create buffers around points and merge with ...
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1answer
278 views

PostGIS metric buffer [duplicate]

I'd like to form a 500 meter buffer around a coordinate. That coordinate is in WGS 84. I've been playing with this for a little and seem to have a solution, but is seems way too complicated: SELECT ...
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12 views

Buffer tool returns huge buffer in QGIS3 [duplicate]

I am trying to apply a buffer in QGIS3 using the buffer tool. The layer I apply the buffer is a CSV layer with EPSG4326-WGS84 reference system. In the first image are my points. When I apply the ...
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2answers
276 views

Removing Intersection of Buffers in Same Layers

I have created a series of buffer regions around line segments in QGIS (in my case a road network): The buffers are in transparent blue with the darker circles being where the buffer segments overlap....
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0answers
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Apply Distance Buffer to Lat/Lon Points [duplicate]

I have a CSV with three columns: CSV Sample: lat,lon,fhr 25.5,-61.7,0 26.1,-63.2,6 26.7,-64.7,12 27.3,-66.2,18 28.2,-67.7,24 29.1,-69.3,30 30.1,-70.6,36 31.3,-71.6,42 32.5,-72.7,48 33.3,-73.9,54 34....
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1answer
39 views

Suggestions on how I can depict numerous cell towers with different ranges?

I am trying to make buffers dependent on cell tower ranges. Does anyone have any suggestion on how to insert distance buffers of various that are dependent on attribute values in one layer? I am ...
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0answers
46 views

QGIS plugin (or other method) to create multi-layer buffer simultaneousely based on parameter input? [closed]

I'm looking for a way to create buffers around objects from more than one layer at the same time, with specific buffer distances, and possibly rendering live the global buffer (resulting of all the ...
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1answer
72 views

Selecting all polygons along northern edge of shapefile in R

I have a shapefile of Mexico composed of Admin 2 polygons. I am trying to create a buffer along the Mexico-US border, in R considering this is a shapefile of Mexico only and I want to retain the ...
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3answers
54 views

If then question with raster calcuator

I have several buffers to be added together (Cold, Hot, Raining, etc.), but they only need to be added if they exist. So I currently have create buffer if Cold else no buffer. (I did convert polys ...
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1answer
39 views

Fixed buffer remove overlayed area

I have a problem with a fixed layer. I have to count accident by Link within 100m area. When I use a Fixed Distance Buffer, there is a problem because some area is overlayed so they will count 1 ...
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1answer
55 views

Find features inside a buffer

I want to find features that are inside a buffer around a line. The idea is to find how far along the line the intersection with the housepolygons happens. I have tried the intersect tool with using a ...
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1answer
77 views

Agglomerate nearby points and sum attributes

I've got a number of ticket outlets, each of which has annual sales as an attribute. I'm looking to represent outlets that are near to each other (within 100m) as one single large outlet, with the sum ...
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1answer
60 views

GRASS: Can v.buffer use geodesic distance like r.buffer does?

Question: In GRASS GIS, can v.buffer use geodesic distance like r.buffer does? If v.buffer can't use geodesic distance, is there a way to do vector geodesic buffering (ideally in GRASS, but I can ...
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84 views

how to calculate the percentage of raster value of each singular buffer?

I am having a problem calculating the percentage of certain raster values inside buffers. I have 1 raster layer with pixel values and 1 vector layer with 40 points. The 40 points are people living in ...
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1answer
2k views

Creating buffers around points and merging with SpatialPolygonsDataFrame to create a list of matched polygons and area of intersection?

I have data on polling booths as points and data on village boundaries as polygons. I want to create buffers of 1km around the polling booths and (a) save the ID of all the villages that intersect ...
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1answer
535 views

Spatial joining/merging two spatial points data frames in R via buffer?

I'm trying to spatial join/merge two spatial points data frames in R. One data frame is lacking IDs, which is the information that needs to be joined to the other data frame. To be specific, any point ...
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0answers
67 views

Algorithm or library for buffer zone for lat-lon (wgs) coordinates in global scale

Can anyone point to generic algorithm or library for buffer zones if the source data is in WGS84 degrees? The buffer width should be in meters, as buffer in degrees it generally does not make much ...
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0answers
20 views

Finding number of links where buffer and link intersect using PyQGIS?

Created a buffer of 0.001 size at the beginning and end of each link. I want to extract the starting point and the ending point of which the number of the buffer and the link intersect is one. layer =...
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1answer
212 views

Buffering with rectangular end caps and not dissolving

I am using QGIS to attempt to achieve what should be a simple task. I need to buffer a polygon layer with flat end caps, and without dissolving the resulting layer. In QGIS there are 3 tools for ...
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0answers
53 views

Using PyQGIS to buffer point? [duplicate]

We extracted the start and end points in the link layer. Can I buffer at the start and end points? (Size 0.001) layer = iface.activeLayer() for f in layer.getFeatures(): geom = f.geometry()....
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0answers
100 views

Variable width buffer based on axis directions in QGIS

I need to buffer a polygon with a different distance in the x and y directions. I should add that my polygon has the following properties: closed (obviously) simple (no edge crossing, no more ...
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2answers
47 views

Calculating boundary around all land on Earth?

I hope this is right here in Earth Science, it's a bit of a Computer Science-y problem, too: I want draw (or really just calculate the total area) of a boundary of X miles (with X varying between ...
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0answers
97 views

Single Sided Buffer Error QGIS

I have delineated a shoreline and created an offset "buffer" of 75' and 250'. When projected onto the screen it appears as though a computation error has occurred and the buffers extend onto the left ...
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2answers
352 views

Create buffers from points by attribute

Suppose I have a points shapefile with a 'group' attribute, each value of which identifies a number of points (e.g. group=1 identifies points 1,3,6 and group=2 identifies points 2,4,5). How can I ...
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2answers
622 views

Creating flat end buffer using geometry generator in QGIS?

I'm new to GIS software and I've been introduced to QGIS 2.18 as part of my internship. I was tasked with creating new styles for the company's maps, however I've encountered a problem with one of ...
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1answer
32 views

How can I do operations with points inside a buffer in GIS

I have a dataset with around 4k schools for with I have their location (longitude and latitude) and enrolment which I have uploaded to a GIS map. I want to do an operation with the competing schools ...
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210 views

Buffered one-to-many spatial join QGIS3 [closed]

I'm trying to spatial join bus stops and census block groups. However, these are a bit tricky with walking distance. Many bus stops are right on the borders of census block groups or within walking ...
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0answers
70 views

Dealing with negative buffers in ArcGIS Desktop when original polygon is narrower than buffer width? [closed]

I am having problems creating a negative 75m buffer with polygons which have regions narrower than 150m. To add some context, I have polygons which are created automatically out of enginnering data ...
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1answer
39 views

Extracting average cell values of multiple buffer zones in ArcMap?

I am trying to find a tool capable of extracting the average values of multiple buffers zones that I created around some GPS coordinates. I have a layer in ArcMap that shows temperature in a field, I ...
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1answer
423 views

Single sided buffers gives not only buffer on one side

I have tried to use single sided buffers to make buffer on one side of of a line. But the buffer is sometimes changing sides as shown below: Must mention that the line is straight: What is the ...
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0answers
44 views

Efficient way for Buffering polygons with a large dataset

I use artificial grid cells (Polygons) for Sub-Saharan Africa to do a sub-national study. I have many variables assigned to each grid cell. Now, I need to include information (development aid programs)...
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1answer
79 views

Counting Block Group Populations in buffers using ArcGIS Pro?

I am trying to find the total population in 2-mile buffers to find the population 2 miles around primary care clinics. So far I have done this: Added block group outlines and joined the areas with ...
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1answer
68 views

Counting points within 100km Buffer of country borders using ArcGIS Desktop?

I have a dataset composed of points and projected on a shapefile describing European countries. My goal is to create a new shapefile, with zones specified 100 kilometers around the borders in-between ...
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0answers
32 views

Extracting blank space between buffers regions

I have a set of parallel lines with standard distance of 1.4m and I have created a buffer of 0.70cm for each row of the lines. Now I need to identify the regions where the buffers do not touch, which ...
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0answers
34 views

Obtaining vegetation data for a coordinate location (lat/long) using ArcMap

I have location coordinates (lat/long) for a province in Canada and I want to map the type of vegetation to that location. I am trying to extract the vegetation data from land cover files which are in ...
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0answers
45 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 ...
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1answer
138 views

Count Polygons in Buffer using ArcMap?

I'm using ArcMap and work with a dataset that contains all the buildings of north rhine-westphalia. This dataset contains different attributes for every object. My task is to count all neighboring ...
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1answer
132 views

Only show buffers that overlap geometry

I have multiple sites that are surrounded by a buffer. I also have a layer which corresponds to areas affected by changes. I am trying to filter out buffers that are not overlapped by the change ...
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1answer
81 views

How to create a boundary around transmission lines?

New to QGIS and GIS in general. I'm using QGIS 2.18 and I've downloaded the shapefile from here https://hifld-geoplatform.opendata.arcgis.com/datasets/electric-power-transmission-lines. I set up a ...
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0answers
87 views

Feature set buffer script is not working in ArcGIS Pro?

I've created a script that takes in a user selected point through a FeatureSet parameter then creates a buffer of that point. It worked fine in ArcMap but now our work is migrating everything to ...
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1answer
177 views

How to convert a polygon to a line? essentially reverse buffering

So basically I've got this data that some other company sent me and instead of them sending it in line format like all the other companies, whatever troll works there just decided to send a 25meter ...