Questions tagged [buffer]

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

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votes
1answer
122 views

Pyqgis Fixed Buffer Creation in Meters with Haversine

On Qgis 2.18, I'm trying to write a python code that allows me to create a 1km, 2km, 3km, 4km, 5km buffer around a selected point feature. To avoid having to reproject things, I'm using the reverse ...
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0answers
94 views

Expanding polygons and clipping at midpoint?

I have several separate shapefiles with polygon features. The end goal is to maintain separate shapefiles for each polygon but form a contiguous, non-overlapping coverage for my area. Basically, I ...
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0answers
82 views

Percent of polygon area within multiple ring buffers using ArcGIS Desktop?

I would like to calculate the percent of area of polygons that are within multiple ring buffers of a number of points. The polygons are associated with a specific point so I would like the buffers to ...
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0answers
80 views

PyQGIS: Setting CRS for Buffer

I know that this is not an uncommon question, but I've struggled to find an answer that works for my application. I'm trying to find the number of nearby permits for any given property. In order to ...
2
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2answers
340 views

Using buffer from IDW in ArcGIS 3D Analyst for flood spread?

I have a line in the centre of a road, with the roads elevation attached to its properties. By using Generate Point along lines --> Add Surface Information --> Adding 10 cm to that, and then IDW 3d ...
2
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1answer
246 views

Single sided buffer produces no result in QGIS?

I've mostly used ArcGIS Desktop but am trying to use QGIS to do a one sided buffer since I only have a basic license. I have a coastline and want to do an offshore buffer polygon. The line file is ...
4
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1answer
146 views

How to define voronoi polygon buffer extend in QGIS from layer extend

I'm using QGIS (2.8.1) Voronoi Polygons Algorithm and I would like to extrapolate them to a polygon layer extend. In order to do this, the tool opens a window asking me to enter a number or expression ...
2
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1answer
141 views

Creating multiple non-overlapping rings but unable to tell which fc they surround using ArcPy?

I am using ArcGIS Desktop 10.4. I would like to create multiple ring buffers surrounding my polygon localities. My buffers should not overlap and I need to know, which location each of my buffers ...
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1answer
751 views

Select Points in a Buffer OpenLayers 3

I have a buffer that is made from a given point, and then I have points inside this area that I want to select. Was thinking I could use boundingExtent somehow but I don't get how the selection part ...
2
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1answer
216 views

Multiple Ring Buffer performance issues

I just computed multiple ring buffers for a point in EPSG 4326 with a 100m interval for a maximum distance of 1000m. I was observing a calculation time of approximately: 50s within ArcMap; 4min in ...
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2answers
36 views

Identifying the nearest center of a buffer for an observation when buffers overlap [closed]

I am using ArcGIS 10.5. Desktop version and would like to do the following: I have a 150 points with coordinates over a map of a city and would like to create 300m buffers around each of them. I also ...
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1answer
122 views

buffers overlaying and double counting

I have layer of water points and a layer of houses. I need to get the number of houses that are within 500 m from a waterpoint. After this I do a spatial join (join one to one) and then I get number ...
3
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2answers
582 views

Buffer multiple files and distances on Python?

How does someone write a python script on arcpy.Buffer_analysis site package to buffer multiple shapefiles (e.g. roads.shp, schools.shp) with multiple distances (e.g. 500ft, 1000ft, 1500ft, 2000ft, ...
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0answers
243 views

How to extract values associated with identified spatial points that is extracted from a spatial polygons data frame using buffer ins

I plotted domestic livestock abundance (each spatial point corresponds to different values, it appears as 1,2.3......but each of these 1, 2,3 has corresponding number of livestock counts in it) in a 4 ...
2
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3answers
95 views

Creating buffer based on occurrence frequency using ArcGIS Desktop?

I am using ArcMap 10.4.1. I have several point shapefiles containing different occurrence data for two different species of flower (from multiple sources, hence the multiple shapefiles). I want to ...
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2answers
121 views

Creating a script that can: [closed]

You are a GIS analyst for the National Park Service. You have been asked to create a dataset showing "wilderness" areas in a national park. These areas are defined as 2,000 feet away from a paved road,...
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4answers
500 views

Minimum wall-thickness of a non convex polygon with holes

What is the most efficient way to find the minimal wall-thickness (value and location) of a complex, non convex polygon area including holes? See example of a polygon in blue, with the minimum wall-...
0
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1answer
66 views

Dissolving Multiple Ring Buffer by Buffer Ring Iteration Order using ArcPy?

I have a lines feature class with the following attribute table: When I run the MultipleRingBuffer_analysis function using the following code (provided by user @Emil Brundage), buffers are drawn ...
4
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2answers
907 views

Creating buffer in QGIS without including surface of original polygon?

I have to have a layer (shapefile) with a polygon that has a 100-m buffer zone around each polygon of my original file. With the QGIS Buffer (fixed distance) tool, I get polygons that include the ...
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0answers
56 views

How add a variable from buffer selections?

New to QGIS; don't know how to use commands. Here is my question! I use a polygon layer of forest fires in Canada (N=50 000+) I have a point layer of centroids of specific municipalities in Canada ...
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0answers
283 views

Percentage of area within a buffer in QGIS [closed]

I have a layer containing the land use of a specific area,and a buffer. I would like to calculate the percentage of each category contained in the buffer. For example in the picture i want to know the ...
1
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1answer
229 views

arcpy Multiple ring buffer: not working for OUTSIDE_ONLY?

I am trying to create multiple buffers surrounding input polygon fc. My code works well if I run default variables. However, if I would like to keep only outside buffers, I got back and error: ERROR ...
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1answer
217 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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1answer
133 views

Create a Square Buffer around a Raster ( .vrt ) file in QGIS Python Console

I want to create a Square Buffer of 10 km around a .vrt (Raster) file in QGIS using Python programming in QGIS Python Console. Please help me to write this python program for creating buffer around ...
2
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1answer
199 views

Joining two or more overlapping buffers using MMQgis plugin?

I use MMQgis plugin to create buffers around points. Some of them overlapping and, to my analysis, i have to "dissolve" lines that cross this buffers. I use Vector -> Geoprocess -> Dissolve, and it ...
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1answer
179 views

Calculating uncertainty for coordinates data?

I have a dataset of species distribution in latitudes and longitudes extracted from geo-tagged photographs. I have plotted them on a map to see how distribution looks like. My attempt was to check ...
2
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1answer
121 views

Multiple Buffer Model

I'm trying to create a model on QGIS 2.18.4 which will allow me to create multiple fixed distance buffers on a selected point(500m, 1km, 2km, 3km,...,50km) with a few clicks, rather than having to do ...
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2answers
313 views

OGR - Error trying to intersect two layers

I'm trying to intersect a buffer with a point shapefile using OGR, but when I run it, I get this error: Traceback (most recent call last): File "C:\Users\xxx\eclipse-workspace\xxx\Final.py", line 40,...
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1answer
261 views

Turfjs buffer + Leaflet return Uncaught _u {}

I'm trying to set a buffer with turfjs in a polygon. The polygon is loaded by L.geoJSON(); . When I execute bufferConcesion, this line var turfBuffer = turf.buffer(feature,value,{units:"kilometers"}); ...
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0answers
203 views

Using transform function in QGIS layer geometry generator?

I'm trying to use the following expression in the geometry generator in a QGIS layer to show a 1-mi boundary around points: buffer(transform($geometry, 'EPSG:4326', 'EPSG:2877'), 5280) However, the ...
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0answers
149 views

Variable distance per direction buffer [closed]

Just as a thought idea. I was thinking of creating a cell reception model using a cell towers point layer. I want to create some sort of buffer radiating from each point but depending in other layers (...
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1answer
33 views

When generate buffer for zonal statistic, how to avoid the neighbor object?

I have a layer of many polygons indicating water area, scattered everywhere. Some of them are very close to another. I want to know what's the slop around the water sites. So I already have a layer ...
3
votes
1answer
59 views

Creating buffers with values, and finding areas with high value overlap of these buffers

I'm working on a project where, essentially, I'm measuring threat levels based on geospatial patterns. I have different groups with higher or lower threat levels based on the distance from their ...
1
vote
1answer
103 views

Error with graphical modeler QGIS “not all arguments converted during string formatting”

I'm new to QGIS Graphical Modeler. I've used ArcMap model builder before and now trying out the Graphical Modeler in QGIS2.18.15. I tried creating a simple model where I create a buffer for a line ...
0
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2answers
838 views

Creating buffers on selected point layer in ArcGIS Desktop?

I try to create buffers of 5m on the selected points only (in ArcGIS 10.3): The problem is that the buffer tool create buffers for all the features, why is that?
2
votes
1answer
58 views

Create subplots between two bounds

I'm currently trying to create a series of subplots within a larger plot, but outside of a nesting smaller plot, and am having trouble with it. This is the code I'm working from. I've also added a ...
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2answers
190 views

Create a buffer for polygons that meet a condition with QGIS

I have a layer with polygons, and I want to make a buffer but only for the ones that meet a condition ("MUNICIPIO"=5). When I make a fixed distance buffer, it makes a buffer for all the polygons in ...
4
votes
1answer
219 views

Multiple buffers to both sides of a line using ArcGIS

I am aiming to create multiple buffer zones to both sides of a line that have flat ends where the line ends (unlike 'rounded' edges of multiple ring buffers) and are not connected (each buffer zone to ...
2
votes
1answer
140 views

Analyzing population within buffer using raster population grid

I have a set of points and a population grid that is a raster file (http://sedac.ciesin.columbia.edu/data/set/gpw-v3-population-density-future-estimates/data-download). I am trying to solve how many ...
2
votes
2answers
92 views

Buffering with dissolve type: ALL for a big feature class doesnot create a single multipart feature

I am using buffer tool on large complicated network (260,000 features) line shapefile to create an area shapefile. This area shapefile somehow has to be dissolved to a single multipart shapefile. ...
7
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1answer
549 views

Splitting overlap between polygons and assign to nearest polygon using PostGIS?

My question is quite related to the unanswered Split overlap between polygons into disjoint sets except I'm not using shapely, I'm using PostGIS 2.4 on PostgreSQL 10. I have a table containing ...
1
vote
1answer
219 views

v.buffer.distance without cap

In QGIS 2.18.14 Processing Toolbox I started to use v.buffer.distance to create fixed-distance buffers around my lines. I can also make the buffer with square caps (straight ends). However, I cannot ...
0
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2answers
596 views

turf.js Invalid unit error for buffer

I have 2 geojson feature collections in leaflet. One of them is road and the other one is parcels. I want to calculate buffer for road and then intersect this buffer layer with parcels. But when I ...
4
votes
2answers
154 views

Creating 1-sided buffer that varies with slope in ArcMap?

I am a forester using ArcMap 10.5. I need to map the riparian management zone (RMZ) along a river that I have delineated using lines for each shoreline of the river. I have 2 foot contour interval ...
1
vote
1answer
2k views

Buffer and intersect using turf.js and leaflet

I have 2 geojson feature collections in leaflet. One of them is road and the other one is parcels. I want to calculate buffer for road and then intersect this buffer layer with parcels. How can I do ...
1
vote
1answer
394 views

Raster Buffer error with package updates

I have just update my r packages and downloaded the newest version of R, and now the buffer function in the raster package no longer works as before. An example of my issue: Running this example code:...
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0answers
127 views

v.buffer.distance does not create straight buffers in QGIS

I've re-ran the v.buffer.distance algorithm numerous times in QGIS as well as the GRASS GIS GUI. No matter what setting I pick for straight corners, or caps at the end of polylines, I keep on getting ...
2
votes
2answers
2k views

Function to create buffers of different sizes in Google Earth Engine

I want to generate a function that allows me to generate buffers of different sizes for the same FeatureCollection. Consider the example below. Instead of repeating the code for buffers of size 100 ...
2
votes
2answers
85 views

Missing 1.6% of expected area after buffering SpatialPoints from vector of widths

Goal: I am buffering a random set of points (i.e. centroids) with different widths from a vector of predefined areas to make a random null model of polygons in a given extent. I am iterating through a ...
3
votes
2answers
533 views

Calculate buffer / multi-ring buffer of geometry with GDAL / gdalUtils

I wonder if there is any way to calculate a buffer on a spatial data set with basic command line GDAL or the R interface gdalUtils. To specify the Q: I have a lot of points around the globe. For ...