Questions tagged [buffer]

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

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25 views

Creating buffer of points with pre-defined area?

I need to create a buffer with a predefined area, my inputs are points, at first I tried it by calculating the area that each buffer may have and then giving the radius as an input, but then I have to ...
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24 views

QGIS -Fixed mile buffer - pullout results for in and out of radius

I am plotting providers for a state with 5 mile buffer circles around the providers. In conjunction, I am plotting where members are located. Is there a way to get a table showing which IDs are ...
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1answer
29 views

Using meters to buffer with JSTS?

I'm trying to create a buffer using OpenLayers with JSTS library. However, even after transforming geometry from EPSG:4326 to EPSG:3857, the buffer method doesn't create distance in meters as ...
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7 views

Assigning points to buffers in MapInfo12.0

First time using MapInfo. I want to essentially spatially join a point(s) that is situated inside a buffer together (so that the point and buffer have the same numerical ID). My table currently listed ...
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1answer
28 views

ArcGIS JavaScript API Buffer Units from Dropdown

I am trying to create a buffer that will have the distance and units inputted by the user. I'm having trouble getting the JavaScript to recognize the which Unit of Measurement the buffer is being ...
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1answer
25 views

Buffering point using PyQGIS?

I have made an attempt to create a buffer around some points useing PyQGIS. However, when running the following code (see below) I receive and IndexError saying that 'list is out of range'. What ...
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2answers
23 views

Proportion of polygon classes in each multi-ring buffers

I have a landcover map with many irregular polygons, with each polygon a uniform habitat type. I have a second shapefile of points, and a third shapefile with multi-ring buffers around those points. I ...
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23 views

How to get middle line of buffered shape in R? [closed]

Just simply, what function to use to get the middle line of such shape? This is a product of sf::st_buffer( ) function and these are 2 polygons, smaller and larger. How to get average one (in the ...
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1answer
55 views

Creating raster cell squares around SpatialPoints (until a certain value range of the raster cells is achieved)

I have a DEM raster and a list of SpatialPointsDataFrames (data available here https://drive.google.com/open?id=1ERFdsqDGLH1a_FbxwawE_gPm0Au0Q9vT). EDIT: (with regard to @Spacedman's comment) I ...
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1answer
45 views

Saving data of original layer while buffering in QGIS?

I'm using QGIS 2.18.27. I have the following problem: I am trying to create some buffers in the city center, as you can see. And I need to calculate some statistical parameter on every buffer. As ...
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36 views

Creating buffer for polygon in R

I am quite new to GIS area. I have a polygon and use concave hull function I could get a boundary like this What I what to do is add a certain-width band along the boundary, so that it could look ...
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20 views

QGIS 3.6 QUICKOSM buildings query CRS with metre untis to create buffer

Using QGIS 3.6.2 I'm running a QUICKOSM query to find residential buildings in Scotland. I want to then put a buffer around them. The query is fine, if a little slow. The only CRS I can get to ...
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32 views

Calculating variable buffers using slope between river and point 100' away using ArcGIS Pro?

I have a network of streams that I need to buffer based on a basic rule set. This buffer will depend on the slope. The slope is determined by the looking at the difference in elevation between a ...
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1answer
68 views

Building single sided buffer around categorized polygon layer

I need to build a 100m buffer around a categorized polygon layer using QGIS 3.2. The layer has four classes and no holes. The difficulty here is, that the buffer needs to be split into the 4 ...
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32 views

PostGIS - Get geofence polygon points within 100 metres of an existing geofence

Let's say I have a geofence polygon with the following coordinates POLYGON((-36.861986 174.726745,-36.859241 174.730442,-36.859821 174.730976,-36.862321 174.728156,-36.861986 174.726745)) I'd like ...
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26 views

Creating drive time buffers in QGIS [duplicate]

I have a set of points in QGIS and I am trying to create drive time buffers around them, how do you do that? I am using QGIS 3.6.3.
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2answers
62 views

Setting Buffer from GeoprocessingTools with a feature

I'm trying to set up a Buffer from Geoprocessing Tools and i would like to put a Field from the layer as Distance Souce. Here is my code : import processing layer = QgsVectorLayer(path_to_routes, ...
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1answer
19 views

Draw a polygon following a centreline in Google Earth

I am trying to draw a buffer of 30km distance around a path I have in google earth. I need this buffer as a polygon as I need to export it to XML for a different purpose. Is there any way to do this ...
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15 views

How does buffering objects in a raster data set differ from buffering in a vector data set? [closed]

How does buffering objects in a raster data set differ from buffering in a vector data set? What are the steps on making a raster buffer?
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1answer
60 views

Quartiling a vector buffer in QGIS 3.6

I am evaluating Hurricane data that has a radius which 64kt wind speeds were observed for a specific event. The properties of a Hurricane dictate that the wind speeds change in each part of said ...
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1answer
38 views

How to use GRASS v.buffer function in QGIS?

Trying to use the v.buffer function to create a 500-foot buffer (map units are in metres, which is why I put 152.4 meters as the buffer distance) around the boundary of a property parcel (not the ...
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1answer
22 views

Exporting feature class to geometry objects and preserving attributes - ArcGIS, ArcPy

I'm using ArcPy and would like to copy features in a feature class to geometry objects and then perform a buffer on the geometry objects and copy them back to a feature class. I am doing this in ...
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3answers
100 views

Creating square buffers with v.buffer in GRASS GIS

I do not seem able to create a square buffer around a point feature with v.buffer in GRASS GIS v.7.4.4. The documentation states that "Using -s with a point vector map as input data, square buffers ...
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1answer
25 views

How to get points around one point buffer area in a table [closed]

I have many points in a table. I want to show points near one point. Buffer area can be 10 or 100 in SQL Server using SQL query.
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1answer
93 views

Subdividing square buffer in sub-units using QGIS?

I've been trying for a while now to create a grid inside a square buffer, so that it can be divided into a pre-defined number of sub-units. Creating a grid that covers the whole area is not ideal ...
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0answers
51 views

st_buffer() not preserving the shape of the original polygons [closed]

I am currently trying to create buffers of 5km around polygons of the region of interest. However, every time I increase the radius from 500 metres to 5000 metres, the shape of the buffer is not ...
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1answer
53 views

Extending (buffering) set of polygons into empty space only using Shapely?

I have a set of polygons of which I would like to extend the boundaries a bit into empty space, using Shapely. They are not allowed to overlap each other at all. For example creating buffers and then ...
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0answers
22 views

GPX file gets incorrect buffer QGIS [duplicate]

When I try to perform a buffer of 10m on my imported gpxfile (geometry listed as points), the buffer covers more like 1000 km. I tried the same with a line vector file, which seems to work properly. I ...
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0answers
53 views

Buffer in ArcMap with FLAT end lines [closed]

I have a polyline shapefile and I am applying a Buffer tool in ArcMap 10.5 version with line_end_type='FLAT'. The buffer shape obtained has not all the end lines with a FLAT end, some of them are ...
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1answer
39 views

How do you calculate drive times around a point? [duplicate]

For example, if I have an Airport point and I want to create a 30-minute Drive Times buffer polygon around it, how would I do that? I'm currently using QGIS 3.4.4.
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2answers
19 views

Trying to make a toolbox from script buffer to erase to make feature layer

I am trying to take a script that I edited from a ModelBuilder export. I am trying to plug it back in to make a tool that will buffer then erase, and then make feature layers. What am I doing wrong? ...
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32 views

Calculating building density within buffer (area) using ArcGIS Desktop?

I am using ArcGIS Desktop 10.6.1. I am trying to calculate the number of buildings within a buffer, followed by building density with a buffer I have set to 7km2. I have parcel data that outline the ...
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1answer
21 views

Buffer option not available to select in Editor menu of ArcMap?

I need to use the Buffer in the Editor menu of ArcMap, but it is unavailable. What is the problem?
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21 views

Creating buffer around points (layer + map in the same PCS)?

Currently creating a map of fire stations in LA and want to create a 50-mile buffer around them. My project right now is in NAD 27 / EPSG:26799 (Projected CS). I also managed to save my shapefile with ...
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0answers
31 views

QGIS Multi distance buffer units do not align with the main layer

I have a buildings shapefile of Beijing. I know the projection WGS_1984_UTM_Zone_50N WKID: 32650 Authority: EPSG So I would like to create multi distance buffer from a central point but when I do so, ...
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35 views

Setting NOT within 200m of lakeshore using QGIS?

I tried to follow the training manual but I met some problem. When I deal with NOT within 200m of the lakeshore, I don't know how to create the right shapefile. For example, how can I change 0 to 0....
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1answer
25 views

How to build buffers for each polygon, which requires the buffer area approximately equal the polygon area in Google Earth Engine? [closed]

I want to build buffers for each irregular polygon in featurecollections in Google Earth Engine. The buffer area is required to approximately equal the polygon area. I am very new to GEE.
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1answer
21 views

Avoiding/cleaning buffer artifacts in R

I'm trying to create a buffer around a multi-linestring object with st_buffer. Here's my initial attempt: library(rnaturalearth) library(dplyr) library(sf) library(rmapshaper) proj_sahel <- "+...
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1answer
153 views

Iterating features and buffering using GeoPandas?

I have a shapefile with many large polygons and would like to process each polygon individually because spatial operations on the entire dataset are too big for memory. For instance, iterate shapefile,...
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0answers
69 views

Fixed distance buffer is oval in QGIS?

I want to create circles of diameter 20m in QGIS. I create a point and then use vector - geoprocessing tools - fixed distance buffer. My problem is that the size is crazy and worse, the shape is not a ...
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1answer
46 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 ...
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0answers
24 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 ...
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0answers
47 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 ...
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1answer
78 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 ...
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0answers
33 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
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1answer
152 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 ...
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0answers
41 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
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2answers
86 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(...
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1answer
44 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....
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0answers
35 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 ...