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Questions tagged [buffer]

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

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Creating Variable Distance Buffers using QGIS

I would like to create variable distance buffers for some points in QGIS 3.4. I have seen in previous posts that there used to be a tool for this in older versions of QGIS, but that this tool wasn't ...
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27 views

Quartiling a vector buffer in ArcMap 10.7

For reference, I found another Q&A with an answer to this same question for QGIS but I am looking for an ArcMap solution: Quartiling a vector buffer in QGIS 3.6. I am trying to figure out if ...
3
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1answer
32 views

Merging or joining two tables with some matching columns in QGIS to calclulate unique values

I have two tables (A and B) that display the presence or absence of a species within a polygon and within each polygons associated buffer layer. The purpose of the buffer layer is to account for a ...
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1answer
29 views

Multiple buffer ring area analysis using ArcGIS Pro

I have some sites what I've created multi ring buffers for in one shape file, each ring is 50m from the center up to 1000m. The file is one shapefile with many polygons and each ring is the full size (...
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38 views

Defining buffer size when labeling text in QGIS?

I need to set label buffer size to near zero but I dont want to overlap labels. How to define buffer size when labeling text? Currently I am using labeling settings which is allowing all available ...
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29 views

Metric system not working properly while creating buffer in QGIS

I am creating 10 meter buffer on line geometry shapefiles. But the output buffer is too large. CRS of my shapefile is EPSG:24383, which is in metric system. I am creating buffer using Vector > ...
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1answer
28 views

Excluding feature classes from list using ArcPy [closed]

I'm new to Python and trying to buffer some feature classes within a list in a Geodatabase. I used the Clip* wildcard to select the files, but I want to exclude three of those files, so I don't use ...
2
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1answer
46 views

Creating plugin in QGIS

I have a problem with my first QGIS 3 plugin. I want to calculate lenght each segment in my polyline and next creating buffer equal 1/2 length of line. The first 13 lines code have to do calculating ...
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3answers
105 views

Variable Buffer on Street Centerline using ArcGIS

I have a street centerline file where all road segments have a functional class of Arterial (A), Collector (C), Local (L). I also have a point file of each intersection. I would like to do a crash ...
1
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1answer
46 views

Drawing concentric circles with different radii in QGIS

I have table that contain point data and multiple distance value for the point data in three different direction. I would like draw arc of 65degree in each of these three directions where the radius ...
3
votes
2answers
70 views

Percentage buffer around multiline in QGIS?

I need to create plugin to QGIS that will draw buffers about width equal 1/2 length each line. Example (my amateur sketch in MS Paint): So, around each lines be created square I searched good ...
2
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0answers
31 views

Row-wise Reprojection of SPDF in R [closed]

I have multipolygons that span across the globe. I was wondering if it was possible to re-project each row, i.e. each country/ ISO3 to a local projection, using a central grouping mechanism. For ...
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2answers
25 views

Representing Roads as Corridors using ArcGIS Desktop?

I am building a map of historic roads with ArcGIS Desktop 10.7.1. Because of the poor accuracy of old maps and the fact that historic roads changed alignment often - sometimes seasonally - a better ...
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0answers
40 views

Correct Buffers crossing dateline in sf package in R

Using the global coral reef distribution data provided by UNEP https://data.unep-wcmc.org/datasets/1 I have been attempting to buffer around the points and polygons of coral reefs. The point buffers (...
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1answer
33 views

Extracting the Number of Pixels within Buffers around Various Points in Google Earth Engine?

I have a Feature Collection of various points, each of which I've drawn a 2.5km buffer around using the following: var bufferBy = function(size) { return function(feature) { return ...
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1answer
37 views

Zonal Statistics only producing one line of statistics

I am by no means an expert in ArcGis, but I will try and explain my problem as clearly as possible. I am analysing forest cover data from the Hansen land-cover dataset ( data https://...
2
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1answer
91 views

Postgis and QGIS inner buffer issue

While creating inner buffers for polygons on postgres/postgis base- a set of few thousand- I received a strange result. Inner buffer for one of the polygons, that was not supposed to appear from ...
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0answers
34 views

How to clip polygon such that only regions in 'line of sight' from a point remain

I am using ArcGIS. My point represents a monitoring station and is located within a polygon representing a river catchment. I have created a buffer of 300m representing the detection range of the ...
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0answers
19 views

Specifying distance units in ArcGIS Pro ModelBuilder buffer process

I'm trying to iterate on some buffer distances in ModelBuilder, and I want to be able to set the units in ModelBuilder. I have numeric (double or long) "multivalues", and I can connect the output of ...
0
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1answer
53 views

Draw a spatial grid with the lat/longs at the center of the grid using R

I looked through multiple posts on the same, and most of them end up drawing a grid connnecting the points or a grid connecting the bounding box of the coordinates. I need a grid with each of these ...
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1answer
84 views

Buffering in WGS 84 / Pseudo-Mercator 3857 using QGIS?

I have read all the buffer issues topics but haven't found solution to my problem. I have two layers: Border layer of Tokyo ward - WGS 84 / Pseudo-Mercator 3857 A CSV text layer with x,y ...
2
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0answers
50 views

QGIS degrees - meters

I have point data in GDA2020. shapefile *.prj file says units are meters. when I load the data in QGIS the layer units are degrees nd the buffer tool is always degrees. I have searched for every ...
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0answers
46 views

Measuring wrong, EPSG:27700 in QGIS3.6

If "enable on the fly" is on and the CRS changes at all during the lifetime of a project then seemingly, it refuses to measure (using the measure tool I just get 0.00000). So new project with all the ...
2
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0answers
43 views

Generating equal-distance band regards to one boundary of polygon in R? [closed]

I have a polygon that is made up of several points: Basically, this reflects the contour of a tumor tissue. Now I have another polygon, which is defined as 'front', means a region where tumor and ...
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0answers
29 views

Adding distance when buffering point geometry in a geodataframe?

I have 2 geodataframes that I want to combine. They the same fields/columns but different geometries (one is points, one is polygons).To do this I want to buffer the points slightly (like 10m or ...
2
votes
1answer
44 views

Extracting all points within buffer on either side of boundary using QGIS?

A boundary runs through the buffer shown. I am attempting to extract all points within the buffer on either side of the boundary, distinguishing which side of the boundary the points are on. Is ...
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0answers
34 views

Buffer not displaying and reference points disappearing in QGIS? [closed]

I have created 'reference points' on QGIS 3.6.3 and ensured I am using a metric coordinate system. The reference points and all data display correctly but when I attempt to add a 150m buffer around ...
1
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1answer
39 views

Area behind polygon starting from a point (radial distancem like viewshed analysis)

I'm looking for a way to create a polygon (grey area in picture) behind another polygon (green), just like a shadow from a point / another polygon (blue). To make it clearer here's what I mean: It ...
1
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1answer
45 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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0answers
26 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 ...
0
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1answer
84 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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0answers
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 ...
0
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1answer
34 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 ...
1
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1answer
37 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 ...
1
vote
2answers
31 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 ...
0
votes
1answer
70 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 ...
2
votes
1answer
55 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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0answers
42 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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0answers
22 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 ...
2
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0answers
39 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 ...
3
votes
1answer
83 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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0answers
59 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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0answers
27 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
76 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, ...
0
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1answer
22 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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0answers
16 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?
3
votes
1answer
76 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 ...
1
vote
1answer
54 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 ...
0
votes
1answer
40 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 ...
2
votes
3answers
105 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 ...