Stack Exchange Network

Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

Questions tagged [buffer]

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

0
votes
1answer
26 views

Continuous buffer from individual polygons in QGIS

I have a stream segment for which I am trying to find a buffer around with criteria as 5m of elevation. So for each straight line within a stream segment, I have found buffer (polygon) for it. Now I ...
1
vote
0answers
16 views

QGIS3 difficulty drawing 150km distance buffer and showing this on the map

I wanted to construct a 150km distance buffer around a city in North America. I changed the project co-ordinate system of the point to WGS84 Mercator North America from WGS 84 Lat/long to enable the ...
1
vote
0answers
30 views

Shoreline assesment via buffer

I've been looking around but haven't found an answer to match. I have a number of endpoint rates (EPR, I'm working on shorelines), and I want to know if it's possible to create a buffer based on the ...
3
votes
1answer
55 views

Buffer with unknown distance by adding numerical values of a column until a maximum

In my QGIS project, I have a vector of polygons representing slope zones around an archaeological site and I want to calculate the area which is necessary to supply the ancient population with a ...
0
votes
0answers
31 views

QGIS dissolves all different shapes into one feature instead of multiple features [duplicate]

I'm pretty new to QGIS and geoprocessing. I have a layer of points representing traffic lights - where each point is a different feature: I wish to create a layer with traffic light junctions based ...
3
votes
1answer
39 views

GEE: How to Create a Buffer Around Canny Edges

In google earth engine I've managed to create a layer using the canny edge detection algorithm (which outputs an image). That layer takes on values of 0 or 1. Now I want to create a buffer around ...
1
vote
0answers
36 views

Create buffer based on the size of a line's length (QGIS) [closed]

I need to create a buffer around a point, witch has to be 1.3x bigger than the length of a given line. I want to automate this process with graphical modeler or pyqgis. So the program should ...
2
votes
2answers
79 views

Got Pacman instead of circle when buffering point QGIS 2.14 standalone C++ application

QgsVectorLayer *circleLayer = new QgsVectorLayer("Polygon", "Circle", "memory"); QgsFeature circleFeature = QgsFeature(); circleFeature.setGeometry(QgsGeometry::fromPoint(geometryPoint)->buffer(...
2
votes
1answer
43 views

Proper output while using geom.buffer in PyGIS?

I am developing a plugin in QGIS using PyQt5. I have used the following code to create a buffer of different distance for different features in a layer. layers = [layer for layer in QgsProject....
0
votes
0answers
33 views

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 ...
1
vote
0answers
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,...
2
votes
1answer
24 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 ...
2
votes
1answer
142 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 ...
2
votes
0answers
39 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 ...
2
votes
2answers
96 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 ...
1
vote
1answer
48 views

Polygon Neighbors for boundary polygons

I am working in ArcMap. I have a map of districts in South Carolina, and I'm trying to find the boundary length that every district has with every other district, and the boundary of South Carolina ...
1
vote
2answers
51 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 ...
3
votes
0answers
39 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
vote
3answers
77 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.
2
votes
1answer
57 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 ...
0
votes
0answers
15 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 ...
0
votes
0answers
37 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
votes
1answer
20 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
37 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 ...
0
votes
0answers
21 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
votes
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 ...
1
vote
2answers
88 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
vote
1answer
53 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
votes
1answer
26 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
votes
0answers
118 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
votes
0answers
22 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
vote
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 ...
-2
votes
1answer
36 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
votes
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?
0
votes
0answers
38 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
67 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
65 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
votes
1answer
42 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
74 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
45 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
66 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
71 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
vote
1answer
71 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
62 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
votes
1answer
107 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
49 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
51 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
129 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
votes
0answers
36 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
476 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. ...