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Questions tagged [buffer]

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

2
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0answers
27 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 ...
1
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3answers
52 views

Perfect circle buffer on QGIS Madeira 3.4

Working on a road junction I would like to make a perfect rounded circle buffer of 1 km around this junction in QGIS 3.4. Here is what is look like now.
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1answer
46 views

Getting the percentage area of intersecting polygons [on hold]

I have the polygons for census tracts within New York City. I also have the polygons for the parks. What I would like is % of the census tract area, with an added 400 meter buffer, that is park. I'm ...
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0answers
14 views

Adding Buffer Wizard function in ModelBuilder?

I am trying to clip a series of raster grids to include into a mosaic. Presently I have made a model that initially reclassifies a grid into one class and then converts raster to polygon to get a ...
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0answers
15 views

Measuring area of polygons in overlapping buffers using ArcGIS Pro? [closed]

This is a simplified illustration of my GIS problem. Overlapping 3km buffers Habitat layer of polygons which represent landcover change I need to know the area of these polygons, the nature of the ...
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0answers
32 views

Pixels, distance to line (negative left, positive right) r

I am using r to do some spatial analysis. Here is my project, I am using raster files (that contain information on land use) and a polyline (which is a border between two regions). I am analyzing ...
2
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1answer
16 views

GeoTools change buffer style

Is it somehow possible to change the buffer style of the build in GeoTools buffer() function? Or is there a User Definded Function for that? I just saw a different buffer function where one could ...
3
votes
1answer
35 views

Assign points within 150 meter buffer of each other the same unique identifier?

I have a bunch of points on a QGIS map. Each point is a unique sampling event. However, some of these points have been sampled multiple times but there is no common identifier in the attribute data to ...
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0answers
34 views

Buffer that does not cross certain barriers [duplicate]

I am having trouble finding any resources on how or if it is possible to create a dynamic buffer that does not cross particular boundaries, like a major highway. For example, if I have a property ...
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0answers
20 views

Grass-v.buffer error [duplicate]

I want to create oval buffers 450 by 350 m tilted by 45° using the v.buffer-tool from the GUI. When I enter everything necessary and click run, in return I get the following error message (same pops ...
0
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1answer
39 views

Finding areas which are inside maximum of 2 buffer zones using ArcMap?

I have a territory with supermarkets. I'd like to find the areas in this territory which has less than 3 supermarket in its vicinity. For that, I created a 1 mile buffer for each POI. Is there a way ...
1
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2answers
77 views

Creating a fixed distance buffer from a virtual layer

First off, i'm trying to learn some python to automate scripts for basic tasks i carry out in QGIS (2.18). Below I create a virtual layer (polyline) using the following script: from qgis.core ...
1
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1answer
47 views

Why can't I buffer polygons in ArcGIS Pro?

I've created a polygon by merging several polygons from the same layer using the merge option under Edit menu. Now I cannot buffer the resulting polygon. I tried repair geometry it didn't help. I'm ...
0
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1answer
21 views

How to free the memory of return value of OGRGeometry::Buffer()?

I have in C++ (gdal 2.3.2) OGRPolygon poly; OGRGeometry* geom = poly.Buffer(1e-12, 1); now how do I free the memory allocated for geom after done using it?
2
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0answers
85 views

RasterizeLayer in GDAL Java

As per the suggestions given by Michael to one of my earlier query (URL given below), I have tried to develop a sample code to perform rasterize using GDAL Java API methods. I had written based on ...
0
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0answers
17 views

Hurricane Wind Swath from track file

I'm working on creating a wind swath plot for Hurricane Irma. The input data looks like this: I used the buffer function in ArcMap and used the radius from input file which is in the nautical ...
1
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0answers
15 views

Deleting vector layer within buffer? [closed]

I am trying to delete points from a shapefile with vector information that intersect a buffer that was created. I have tried using the intersect tool, but that only highlights the information that ...
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votes
1answer
29 views

Filter four features from a vector shapefile to create a new layer to perform buffer, intersection and union on it, in QGIS 2.18?

From a dataset that contains points of interest defined by type of object with four different features, I am trying to distinguish the features to perform different analysis. Thought I had to filter ...
0
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0answers
10 views

Creating terrain polygon buffer from line using ArcMap? [duplicate]

I have a line in a steep hill, and need a 400 meter buffer on each side of the line. I know (roughly) how to create buffer on a point, but not a line. Can someone help me here?
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0answers
35 views

Which label from different points inside a polygon is the most repeated

I have millions of points, each point with a label. These points are inside of different buffers (polygons). I want to create a new column that puts the value of the label that is repeated more time ...
0
votes
1answer
49 views

Single Side Buffer pyQGIS

I am trying to create a single side distance buffer around a line on QGIS. Here is the code I am writing but I don't get the expected result: processing.runalg("qgis:fixeddistancebuffer","input.shp"...
1
vote
2answers
59 views

Calculating maximum distance between roads (Spatial Line Shapefile) in QGIS?

I’m writing my masters thesis and came across a problem I haven’t been able to find an answer to. I’m working with QGIS and a Spatial Line Shapefile that represents all streets in Tibet, taken from ...
0
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1answer
32 views

Resample rasters after buffering in R

I have a raster stack that has NULL values from applying a focal buffer. They're not NA values but 0. Each layer shares the same extent, but the layers with the larger buffer widths have more 0 values ...
1
vote
1answer
42 views

Calculating Population Within Buffer in QGIS

I am new to QGIS and GIS systems in general. I have a shapefile of zip codes with associated populations inside them. I also have random lat/long points. I am trying to find the number of people ...
0
votes
1answer
42 views

Creating buffers around locations when using a Geographic Coordinate System

Background I am trying to make students familiarize with some some basic GIS procedures (using QGIS 2.18), like creating simple maps featuring points that represent the location of shops in a given ...
0
votes
1answer
63 views

Buffering a line

I would like to construct a feature class consisting of every polygon in the landuse shapefile entirely within a 300 Feet buffer of the Road. But I always get error of C:\Road300 does not exist or not ...
0
votes
1answer
49 views

Fixed Buffer disappears after closing QGIS [closed]

Has anyone else experienced this problem and knows how to solve it? When I reopen QGIS the buffer layer is still there but the buffer lines themselves are not shown in the map anymore.
1
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1answer
69 views

How to change a buffer's shape?

I have made a buffer around a point using the CRS WGS84. I made my buffer by Selecting a point and using the Buffer tool within the Processing toolbox. I ideally wanted my buffer in meters but ...
2
votes
0answers
44 views

Converting single point layer to buffered raster using QGIS?

I'm trying to use the proximity tool to create a distance raster from a single vector point. I found here: Calculating distance to points in QGIS and [d-3] Create Proximity Raster. However, I couldn't ...
0
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0answers
32 views

Buffering lines around point using QGIS? [duplicate]

I am not sure if I can achieve this using QGIS. I'm trying to make a tool which takes a single point which is a wave source with an initial magnitude. The value decreases as you go further away from ...
0
votes
1answer
80 views

Vector averaging wind direction using focal buffers in R?

I have a raster of 1 km wind direction data that I need to run a focal buffer on. Instead of using the default buffering mean function, I need to use vector averaging since my wind direction is in ...
0
votes
2answers
45 views

Select by Attribute homework help

I am learning how to use ArcGIS and I am unsure how to assign appropriate buffer distance to each lake size classes for a homework assignment, please see the picture below. The goal is to place ...
0
votes
1answer
46 views

Why does buffer produce same error consistently?

I have created a point --> Figure 1 I have then selected the Buffer tool and created a buffer around my chosen point, with a degree interval of 0.012. I have selected the End style cap as square and ...
0
votes
1answer
81 views

Network service area - QGIS

I want to check if schools from my hometown are accessible for students who use public transportation, so I need to perform this analysis in order to see if the schools are located in the range of ~...
0
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0answers
34 views

Why is my area offset using the V.buffer tool

I am using QGIS V 3.2, and I am trying to use the v.buffer GRASS TOOL to create a 500m exclusion zone (Circle) around a point. After creating a point shapefile I then ran the v.buffer tool and set the ...
1
vote
2answers
275 views

How to buffer a pair of longitude and latitude coordinates in R?

I have a pair of longitude and latitude coordinates, and I want to plot a 500 meter buffer around it using leaflet or mapview. st_buffer, however, does not correctly buffer longitude/latitude data. ...
0
votes
1answer
81 views

What is the unit of measurement of the distance between two points using geopandas distance function?

I have created three buffers using geopandas in python and I have a few points scattered here and there, some of them are inside the buffers.But the problem is the following: When I obtain distance ...
1
vote
1answer
64 views

Buffering without overlap using QGIS?

Goal: Buffering line features, where the buffer "ends" when an other buffer is about to overlap. Simply: Buffering without overlapping and creating a smooth border between the buffer. My first ...
0
votes
1answer
29 views

How do I obtain the distances of each point lying inside or outside buffers from the center of buffers?

My aim is to obtain the shortest distance between all the points overlain on a polygon and the center of buffers also overlain on the same polygon. I have done the following to illustrate this: ...
1
vote
1answer
46 views

Adding buffers around each city of user defined region using geopandas?

How do I obtain a buffer around each city on the overlay map of cities on the United States area? I have used the following piece of code to work this out but this does not work out it seems. I am ...
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votes
1answer
36 views

Buffer all polygon feature classes inside geodatabase using ArcGIS 10.4

I have a geodatabase which contain a hundred of separated polygon feature classes. I want to create a same value buffer of all feature classes in same time. Each buffer must have a "dissolve" option. ...
1
vote
1answer
43 views

How to create buffers around points in ArcMap when there is a lack of OID

I want to create buffers around points in ArcMap. Using the Buffer (Analyst) tool, I indicated 100m buffers around my points of interest. I get the error: ERROR 000339: Input price, ads (v8) - ...
2
votes
0answers
79 views

QGIS - Label Rectangle/Buffer Overlapping Layer Above

When I apply a buffer or rectangle to my labels they show through the overlying layers. Is there any way to avoid this, i.e. arrange the label so it lies underneath the layers above? I'm assuming the ...
1
vote
1answer
48 views

Creating Buffer of specific area using QGIS?

I am trying to create a buffer which would include only the Mediterranean coast of Spain (excluding borders), running from the south western extremity close to Portugal, to the north eastern extremity ...
3
votes
3answers
295 views

Buffer around outline of polygon

I'm fairly new to QGIS, and I'm trying to create a buffer around the outline of Spain (including the coastline and boarders). When I do so, it buffers all the country from center to the edge, I just ...
2
votes
2answers
47 views

How can I buffer a mulipolygon only on the coastline?

How can I achieve something similar to the below image? (Apologies for the crudely drawn diagram) Either in QGIS or PostGIS. I have a series of station grounds and I want to retain the inner ...
0
votes
2answers
63 views

Difference between two polygons in Earth Engine

I have a reservoir and its buffer (see below). I want to do the difference between the 2 so that my buffer is just a contour around the polygon. I tried the 2 following scripts but cannot get the "...
0
votes
2answers
43 views

Using Variable Distance Buffer in ArcGIS Desktop?

I am new to ArcGIS. I have a point shape (Location of a wind power plant) and I want to create a buffer dependend on the diameter of the rotor. Can someone give me a hint how to do that?
0
votes
1answer
35 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 ...
-2
votes
1answer
34 views

Buffer units in Geographic Information Systems

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