Questions tagged [buffer]

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

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17 views

ArcGIS - Identify which buffers intersect each other

I have a dataset with buildings. I want to calculate which buildings are within 25 meter distance of each other. Therefore, I calculated for each building a 25 meter buffer around the building. Then ...
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27 views

ArcGIS buffer wizard tool giving No map units defined

When I click on buffer wizard tool in ArcGIS software, I get an error: No map units defined! How can I fix it?
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1answer
71 views

Buffers and spatial join

I have 2 layers, one which is a point layer with entertainment locations and the other is a polygon layer of buildings. I'm tasked to find how many buildings are within a 180m radius of the ...
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r raster:: extract band (integer) values from raster buffer without taking the mean

I want to extract values from my RGB raster, which are in the buffer(zones) of my 14 station points data. So far the values are extracted with the raster::extract by taking the mean of some values ...
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37 views

How do I get R to recognize a buffer around a las file?

I'm trying to clip from a catalog using a shapefile. The file is huge, so I've divided it into two (ctgw1 and ctgw2). The final radius should be 47 (the ctg is in feet) and I'm trying to set a buffer ...
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36 views

Parallel Offset of a Polygon Edge with Shapely

I need to offset edges of a polygon by different amounts. buffer() will parallel-offset all the edges by the same amount, and each in its edge-normal direction (and in both directions if applied to a ...
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1answer
74 views

Count number of points outside of Buffer?

I'm trying to count the total points outside of a buffer zone using PostgreSQL. The intention is to find all of the schools that do not fall within a 2 mile radius to libraries. I've either gotten ...
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How to add raster value with specific equation?

I am trying to develop a raster layer with the interference of streetlight in this example: As you can see there are multiple buffer rings around a point layer. I actually want to transform this ...
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1answer
68 views

How to buffer and intersect in QGIS 3.12?

I'm very new to QGIS. I'm trying to create a buffer of rail lines, but it's coming out much larger than it should be, e.g. when I try to show a 500-ft buffer, it results in a large circle whose radius ...
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1answer
3k views

Python Shapely - filling small gaps between multi polygons

I have a set of rectangular polygons, which currently form a directional path. The library I am using is Python Shapely / GeoPandas. The issue I am having is as the path changes direction, there are ...
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Error while running Variable distance buffer in QGIS 3.12

I have problem in QGIS 3.12 when I try to use the tool Variable distance buffer I get an Error. This is the log message I get from the error: { 'BUFFER' : 'TEMPORARY_OUTPUT', 'DARC' : 5, 'DISSOLVE '...
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219 views

Combining ST Buffer and Intersect with Where clause

I'm trying to create a buffer around a single point in a spatial entity and finding all the points from a different entity that fall within that buffer. I tried two approaches. The code below runs ...
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ArcGIS 5km buffer output is very small and square?

This is part of a task for an intro to ArcGIS class, and I'm super stuck. I need to create buffers of 5, 10, 15, 20km from a centrepoint, to investigate vegetation changes over different years. In ...
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Changing buffer units in Python script

If I use the standard buffer tool in ArcMap, I can set the units for the buffers. I'm trying to execute a python script to do the same thing, but the resulting buffers are huge and incorrect, ...
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1answer
763 views

QGIS Buffer Not Recognizing All Features in Layer

I'm completing online course GST 101 for QGIS (my version is 2.18.3) and I'm stuck on the Buffer tool. All of my layers are set to CRS "NAD83(HARN)/New Mexico Central (ftUS) (EPSG:2903)" as ...
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1answer
65 views

Partially processing a catalog with an extent in lidR

I am using lidR to create a DEM of a very large area (over 1 million hectares). I have already processed a portion of this area. I would like to be able to read the entire LAScatalog so that the ...
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1answer
32 views

How to use a specific AREA (km2) to create a buffer-like feature around a polygon (Area to Buffer)

How to create a buffer (or buffer-like feature) based on a specific area (in km2)? I have a specific area (e.g. 14.5 km2) and would like to lay this area as a buffer (or something similar to a buffer)...
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Error while buffering 50.000 meters

I am on QGIS 3.10.1-A Coruña. I want to create a buffer of 50.000 meters around the cities on my map. When I am using the buffer tool I get a disproportionate result (first image). My layer is in ...
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3answers
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Creating straight sharp buffer corners instead of round ones

I am trying to create several buffer layers around a simple box shaped polygon based on distance in km. CRS is World Mercator(EPSG:54004) and was reprojected beforehand. I am getting buffer polygons ...
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57 views

MapWinGIS Create Buffer Using WGS84 Lat Long Coordinate System

I am using MapWinGIS with c#. I am trying to create a buffer for a polygon that has WGS84 decimal degree reference system, but it never get displayed. Here is my code: // Form load var gp = new ...
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1answer
45 views

Buffer tool issue in QGIS 3.12

When I use Buffer tool. Distance is in geographic degrees. And it suggests me "Consider reprojecting to a projected local coordinate system for accurate results" I try to change map unit in "Project ...
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Buffers between center points of irregular polygons

I'm having some problems, I hope some of you have some experience with buffers :) I have the road network of a city (40.000 polygons approx), and I am trying to create a buffer between the central ...
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1answer
78 views

Creation of buffer area of 20mtrs upon click event on the base layer

I have a base layer upon which i wish to import a kml with certain lat lons and create a buffer region of 20mtrs around any point upon click event. i got google api for the same but want openlayers ...
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2answers
29 views

How to cut polygons that overlay other polygons in ArcMap?

I created a layer of buffer polygons following some conditions (distance from parks, stations etc). Some of the buffer polygons are now overlaying public_parks polygon layer. What tool can I use in ...
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1answer
278 views

QGIS Buffer with MMQGIS and GSHHS: strange lines

I want to calculate a buffer around the worlds coastlines. To do so, I downloaded the GSHHS data version 2.3.7, imported it into qgis, used "polygons to lines" and then the MMQGIS Plugin to produce a ...
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2answers
718 views

QGIS regular points around each polygon in a layer

I have a number of buffered points (somewhere polygons intersect & are dissolved. I'd like to create regular spaced points grid around EACH polygon -- not ALL polygons. When I do Vector -> ...
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Missing Vector Pull Down Menu

I was looking to create buffers around roads that I input in QGIS but every tutorial video I looked at did it by clicking on a pull-down menu titled "Vector" which doesn't appear when I open QGIS I ...
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1answer
97 views

How do I create several concentric buffers in a loop in R

I am working with polygons and I need to create concentric buffers every ten kilometers until I reach a distance of 70 kilometers, in this sense I want only the 10 kilometers rings without the polygon ...
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1answer
67 views

Buffering every polygon in layer?

I'm trying to use the "Fixed Distance Buffer" from the Processing Toolbox to create a 500m buffer around all the woodlands in my layer, but the tool only puts a buffer around the smaller woodlands. ...
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1answer
45 views

Processing tool window doesn't appear in QGIS

I'm encountering a strange problem: I cannot execute any tools in QGIS (e.g., buffer, join--literally everything anything in the Vector or Raster menus. This seems to apply to all tools in all plug-...
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1answer
41 views

Polygon fitting along the line keeping its area using ArcGIS Desktop (ArcPy) [closed]

I have a layer with polygons. And I need them to fit along the line. With Reshape Feature Tool I can do this, but there is one problem, the polygon area changes. I need to keep the polygon area. Any ...
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2answers
511 views

Fixed Distance Buffer distance not working on polygons with holes [duplicate]

I am trying to implement this solution (How to merge single polygons to multi part polygons by maximum distances?), but when I create a buffer around my polygons, those with holes are ignored. I tried ...
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22 views

Specifying a variable in ArcMap output if this is not present in the input

I have been using ArcMap 10.6 (working from within a .gdb, with vector files) to buffer selected variables from a number of files (classes of water, buildings, roads and a constructed other for the ...
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Shapely buffer(0) returns an empty polygon(coordinates:[]), and discard the main polygon

There are self-intersect polygons in my geojson files. So I used the shapely lib to fix it. The code is like this: clean = geom.buffer(0) Most of the polygons have been processed properly, but there ...
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29 views

Analyzing the landuse in overlapping buffer area

I want to do landuse regression. The reference points are 200m apart. I used buffer tool in Arcgis to draw areas of 500m to know the landuse area of the 500m radius buffer area. There were overlapping....
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2answers
803 views

Calculating mean for each buffer using QGIS?

I am attempting to calculate mean NDVI at different time points with 100m and 500m radii of certain co-ordinates. Thus far I have used 'Raster Calculator' to calculate the NDVIs and have used 'Vector -...
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26 views

Leaflet Buffer value by GeoJSON feature.properties

Is it possible to add a buffer to a list of points, taking the value of the radius from the properties of the GeoJSON file? This is my code to take points from JSON files and represent them as ...
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Are geodesic buffers dependant on geographic v projected coordinate system?

I am trying to create a geodesic buffer in ArcGIS (v10.7) but the outcome differs depending on whether I use a projected coordinate system of geographic coordinate sytem, while I would expect that the ...
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1answer
298 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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1answer
27 views

Create buffer around one category of polylines in feature

I have a feature that contains polylines of fluvial and tidal streams in ArcMap. I want to create a buffer around the tidal streams only. I tried selecting only the tidal streams using the ...
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1answer
43 views

How to create 3D parallel lines with Z coordinates as same as Original 3D polyline using Arcpy?

I want to calculate cut/fill cost for road alignments. For this reason i need to create a buffer-like polygon from given road centre-line but this polygon has to have Z-values that are taken from ...
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37 views

Creating planar 3D buffer from 3D polyline feature class in ArcGIS Desktop

I want to create a planar (=without volume) buffer polygon or a TIN from a polyline feature class that represents a road centreline ,containing Z-value. I want to expand my polyline horizontally (=...
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1answer
92 views

Achieving the opposite of the shortest_line() function in QGIS?

I currently use the Geometry Generator styling on a point layer to draw the intersection between protection buffers around tree points and another polygon (say a building footprint) using the ...
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1answer
68 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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2answers
323 views

QGIS equivalent of inline variable substitution in ArcGIS?

I am working through some analysis in QGIS and need to iterate through a layer of points and buffer each point and then export to a new layer. I want the new layer names to have the values from a ...
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1answer
105 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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1answer
11k views

Geopandas buffer using geodataframe while maintaining the dataframe

The objective is to create a geoDataFrame with buffered geometries AND with all the "attributes" of the original geodataframe. I am able to perform a buffer on my geoDataFrame using: gdfHybasBuffer ...
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1answer
122 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
20 views

Fixed Distance Buffer Gives Inaccurate Distances

I have a world map shapefile showing all continents. Each of the shapefile is projected and I need to buffer each of the continents with a 1000 km buffer, but all my buffers show incorrect distances ...
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6answers
37k views

Creating square buffer around point feature using ArcGIS for Desktop?

I would like to create a square buffer from a point feature but I do not understand the code that goes into it. Similar questions have been asked on the forums.esri website but that was over 10 ...

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