Questions tagged [buffer]

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

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Making different classes create different size buffers/Thiessen polygons based on point data in ArcGIS ModelBuilder?

Is there a way of getting point data with different classes/numbers create different buffers/Theissen polygons in ArcGIS ModelBuilder? For example: If two points are plotted on a map with the ...
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32 views

Points from polygon with buffer

How can I get points from polygon considering a buffer zone where within that buffer only one point will be generated. I have a few polygons for suitable locations. Now I want to make points from them,...
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1answer
30 views

Including buffer to IDW in ModelBuilder

I have created a model with ModelBuilder to interpolate values with the IDW tool, iterating through rows. How can I restrict interpolated values to regions within a 20km buffer? I tried setting the ...
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1answer
600 views

Creating square buffers around points using shapely? [duplicate]

I am trying to create square buffers around given points, I am able to create circular buffers but how do I create square ones? from shapely.ops import transform from shapely.geometry import Point ...
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40 views

Searching on the fly within buffer in QGIS

I am using "Unique Values" widget with "Editable" option in QGIS 2.18.3, for my "Name" field in POIs layer to eliminate spellings mistake. "Unique Values" widget fetches all the distinct values in a ...
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2answers
159 views

ST_Buffer in PostGIS produces different results for the same set of lines

We have a single LineString (a route on a map) made of multiple points (blue line) which we are then buffering to produce an area around it. We have found that everything looks as expected unless the ...
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2answers
57 views

Buffer Until Intersection using ArcGiS ModelBuilder?

I am trying to use ArcGIS ModelBuilder to create a toolbox that places a buffer of 1 mile around X location, but does not cross major highways. Effectively, I am geo-fencing in real estate comps. In ...
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42 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 ...
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3answers
121 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
62 views

Getting the percentage area of intersecting polygons [closed]

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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16 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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42 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 ...
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1answer
31 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 ...
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1answer
42 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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26 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 ...
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1answer
41 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 ...
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2answers
127 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 ...
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1answer
64 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 ...
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1answer
34 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?
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165 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 ...
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25 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 ...
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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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1answer
38 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 ...
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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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40 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 ...
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1answer
98 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"...
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2answers
75 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 ...
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1answer
61 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 ...
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1answer
125 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 ...
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1answer
50 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 ...
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1answer
68 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 ...
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1answer
140 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.
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1answer
76 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 ...
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0answers
86 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 ...
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1answer
130 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 ...
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2answers
50 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 ...
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1answer
58 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 ...
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1answer
201 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 ~...
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39 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 ...
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2answers
988 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. ...
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1answer
225 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 ...
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1answer
112 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 ...
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1answer
48 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: ...
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1answer
134 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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1answer
42 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. ...
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1answer
90 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) - ...
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0answers
102 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 ...
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1answer
51 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 ...
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3answers
415 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 ...
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2answers
73 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 ...