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

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18 views

Filling table matches multilayer from buffer in PostGIS?

I have some tables in Postgis of differents geometries (Points, Lines, Polygons). I create a buffer of 1 kilometer of one point with this: ST_Buffer(ST_GeomFromText('POINT(3056563.45195278 804692....
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0answers
20 views

Creating inner ring of polygon using buffered geometry in JTS? [on hold]

I am still a beginner to GIS. I have a polygon and I want to draw a large border inside the that polygon (see fig A and B below). With the library I am using, I have to do this with a polygon with "...
0
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0answers
13 views

create individual buffers from vector points and then batch convert those buffers to rasters? [on hold]

following on from my previous question draw concentric circles that correspond to the free space loss formula I now want to perform this for a large amount of points. I tried using the modeller in ...
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1answer
11 views

Geoserver buffer json input format

I am trying to execute a buffer operation using geoserver 2.8.3, but i'd rather use json than GML to send this request. Is it possible to perform an Execute operation this way? The describe process ...
0
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1answer
20 views

ESRI JS API - Buffer FaetureLayer

I have a Feature Layer that I would like to buffer using user input and a geometry service. FeatureLayer: var texasPipeline = new FeatureLayer(pipeURL, { mode: FeatureLayer....
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1answer
30 views

QGIS select points within certain radius

I've seen other threads ask very similar questions, but I haven't seen one that answers this specifically: So, I have 4 Total sets of points. 1 set is a set of addresses in Arkansas, the other 3 are ...
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2answers
51 views

Find line segment that is not between other lines with QGIS

As shown in below image, I have a project with rivers(blue) which are bordered by fences(green). I have to identify the places that are not guarded by fences. The fences can be further away from the ...
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1answer
36 views

How to use the QGIS GDAL Toolbox Offset lines?

I try to create a single sided Offset line for a line. I used the GDAL-Tool "Single sided buffer and offset lines for lines" but I fail. The error message says "wrong number of arguments to function ...
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1answer
32 views

Avoid to get rounded corner after a polygon buffer (FME)

I try to create a buffer for my polygons that leave the angles intact (not rounded). With postgis/postgresql I can do: SELECT st_buffer(geom,5,'join=mitre') FROM mypolygon; With ArcGis I can ...
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35 views

Create Buffer Where Size Based on Field Value from other shapefile

I am trying to create a buffer for a polygon(HPO) where the size is dependent upon whatever value is found in a particular field in a polyline shapefile (TestJoinSeg). I believe I can use the ...
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1answer
24 views

buffer in geoserver

im new in geoserver i created a web page that displays a map by some more Capabilities and i want to add Ability to create a buffer Centered the Position that i click on and my ideal is select or ...
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28 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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2answers
91 views

Perfect circle in ArcGIS, why I get a multiside polygone (plurigone)?

Using ArcGIS basic (10.3), I tried to make perfect circles in ArcGIS with the buffer tool. As you can see on the two print screens, the circle is not perfect when I use a radius of 7,5 meters in a MTM ...
2
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1answer
46 views

Cluster analysis using buffers and polygon features (NOT layer)

I have a point-based vector layer, where each point represents a road accident. I am trying to write a function that: Loops through my accident layer creates a buffer, of a given radius, around each ...
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56 views

Erase function creating empty output with layer that was buffered [closed]

This is in ArcMap. I have a shapefile of a vegetation coverage that I buffered by 1 mile. I'd like to remove the area inside the newly buffered area using the erase function. Every time I run the ...
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1answer
67 views

How can I make buffer with ST_Buffer in PostGIS

I am trying to make a buffer(0) as a fix-geometry process in PostGIS 2.2.2. It like this: SELECT ST_Buffer(ST_GeomFromText('POINT(100 90)'),0,4); I am using sources from this man-page. It ...
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27 views

How to create dissolved buffers using QGIS virtual layers?

To create dissolved buffers in PostGIS I use ST_Dump and ST_Union: SELECT row_number() over() AS gid, sbqry.* FROM ( SELECT (ST_Dump(ST_Union(ST_Buffer(input_layer.geom, 100))))....
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1answer
15 views

How to discard sites when there is overlap between buffers?

I have 1,000 sites in a landscape that were sampled along a road. However, I think my sites are too close together. A lack of independence between my sites many be influencing my statistical models. ...
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1answer
46 views

Plot multiple buffers around points

I have three buffer radius sizes radius<-c(1000,700,500) that I have placed around an array of points (two example points are given here in the file SourcePlace). What I'd like to do is ...
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43 views

Automatically split line at intersection of nearby shapes/zones

I have a large dataset in QGIS with roads (blue line in picture below) and 3 type of zones (mostly rectangular areas, red and green shape in picture below). My task is to spilt to road into segments ...
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1answer
38 views

GRASS/QGIS- “buffer” created with DEM analysis- how to avoid it?

I have, to start, a DEM raster and a shapefile, with random created points, within a given polygon. The DEM raster was clipped with that same polygon. With the DEM raster, I used GRASS to perform ...
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2answers
56 views

Can I extract circular buffers from polygon layers?

I have been working in QGIS with a large and detailed shapefile where remaining forest fragments are represented as polygons. I would like to extract circlular buffers, of various radii, from this ...
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3answers
79 views

Erasing small polygons from bigger overlapped polygons using ArcGIS for Desktop?

I have different bigger polygons (buffers) which are overlapped (A,B,C,...) and the inner smaller ones (a,b,c,...). I want to erase smaller ones from bigger ones in the way the results be A-a, B-b, C-...
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1answer
46 views

Using negative radius buffer for ST_Buffer?

I am using postgis 2.2. I am using ST_Buffer to my polygon and it's working for positive radius (in meters) but when i am going to apply negative radius it is showing empty values. Here is my ...
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1answer
40 views

How to extract values from a raster stack within overlapping buffers?

In R, I have a raster stack with 6 variables. I would like to extract the mean and maximum value of each variable at 300 coordinates within a 500m buffer radius and a 1km buffer radius. In ArcGIS 10....
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108 views

Buffer tool not surrounding complete shape in ArcMap [closed]

I'm running a basic buffer tool on a polyline shapefile (teal line), to create a 50km buffer (beige) around it. However, ArcMap appears to only buffer part of the map (see image below). How can this ...
2
votes
1answer
58 views

How do I calculate the percentage of a line which falls in each of my multiple ring buffers?

I have lines around which I have created multiple ring buffers at several intervals. I have another line (call it the flight line) which in theory should overlap the original line. I need to work ...
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0answers
21 views

Output feature class is arbitrarily split into sections by Arc GIS

I’ve attached a picture illustrating my problem. In the picture areas 1, 2, 3 and 4 should all be joined as one polygon. Instead it looks like arc has split the polygon into four parts using a grid, ...
3
votes
1answer
119 views

Converting Road Lines to a Binary Raster Image

I got road data from the USGS database and imported it into QGIS. And I want to transform it into a binary raster image that looks like this in QGIS (this is only a processed screen shot but I want ...
4
votes
1answer
60 views

How to create multiple buffers based on a list of values?

I am looking for a method to buffer geometries by passing a list of buffer amount values in QGIS. The resulting polygon layers should be suffixed with the buffer amount by some way. By passing i.e. (...
1
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1answer
36 views

QGIS buffer points, buffer amount in attribute value

I have a set of points in a shapefile with a real number attribute 'r' containing a radius (cp. screenshot below) and i would like to buffer these with amount of 'r'. As the result I expect a polygon ...
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0answers
23 views

Making new variable that is average racial composition in neighboring tracts using ArcGIS for Desktop?

I am a Public Health PhD student doing a mixed methods thesis - and the spatial analysis is not my strong suit. I want to figure out if there is a way to generate a new variable which would be the ...
3
votes
2answers
69 views

Using Buffer tool in QGIS?

I am using the Buffer tool in QGIS to put a 30 Meter buffer around a number of points. When I do this the buffer ends up taking over the entire map. enter image description here
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40 views

Multiple buffer subtraction?

I've created two different buffers (1 mile and 3 miles) in ArcMap, I need to see how many people live within 1 and 3 miles. In other words, I need to subtract the bigger buffer from the smaller one. I ...
2
votes
1answer
68 views

ArcPy Insert cursor losing vertices when writing Polygon features?

I'm currently trying to code a geodesic buffer from points (the one that is implemented in ArcGIS is very slow). The idea is to calculate 100 point coordinates (P_Buffer) around an initial point (P) ...
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1answer
48 views

Counting number of raster groups within buffer layer?

I am trying to count the number of times each category of a raster layer appears in a buffer square. I have attached a picture to help explain. In the picture example I would want the 'red group' to ...
2
votes
2answers
44 views

postgis How can I obtain directional buffer?

I have a geometry (polygon) which I want to extend with a buffer while testing on it in a where clause. The problem is that I would like the buffer to be only applied according to one or more ...
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1answer
47 views

Point buffer not round - jagged circle like thing

Any ideas why running a point buffer (50 and 150 meters) would result in this shape? ArcGIS 10.2 - All projections match
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1answer
37 views

missing buffer values when using zonal statistics in ArcGis

I am using zonal statistics in ArcGis 10.2.2 to calculate the mean value of fire frequency within 1km buffers. However, I have noticed that this is not being calculated for all of my sites? There are ...
3
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2answers
173 views

Creating OUTSIDE_ONLY buffer around polygon using R?

I would like to create buffers in polygons, surrounding my original polygon. However, I want to keep only the "outside polygon", not include also original polygon. In Buffer in ArcGIS I can just set ...
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0answers
23 views

Buffering with QGIS [duplicate]

I am using QGIS to do buffers for houses within 100 meters radius with each house being an index house to the rest. I expect to get several buffers since there are 1,470 houses with x,y coordinates in ...
1
vote
1answer
30 views

Correlating 3 data sets and extracting information from each in ArcGIS for Desktop?

I am currently trying to find a way to correlate 3 separate datasets as point shapefiles. I would like to import all three shapefiles, and apply a 5 metre buffer to each point. Then, for each point,...
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1answer
64 views

Creating a buffer in ArcMap…? [duplicate]

I need to create a buffer around a polygon. I know how to do this, but my problem is I need the buffer to be 250 feet to the south, east, and west, but 500 feet to the north. Is there any way to ...
3
votes
1answer
88 views

How to Change the buffer distance from degrees to meters in QGIS 2.14 Essen?

I am new to QGIS and the whole field of GIS in general. My project and all its layers are set to the CRS of EPSG:26913, NAD83/UTM zone 13N. I am trying to use the geoprocessing tool Buffer(s) on a ...
0
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0answers
39 views

Buffer widget with Esri JavaScript API (3.16) for ArcGIS Server

I want to create buffer widget, but my code doesn't work ( my code is blocked in this line : esriConfig.defaults.geometryService.buffer(params, showBuffer); This is my code : define([ 'dojo/_base/...
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0answers
56 views

Call gdal_proximity() from R

I have a raster including eight land cover types (pixel values ranged from 1 to 8): > r class : RasterLayer dimensions : 9887, 30532, 301869884 (nrow, ncol, ncell) resolution : 10, 10 (...
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1answer
12 views

Will symbol size impact buffer size?

I'm using ArcMap 10.1. I want to create buffers that represent CO2 equivalent from landfills. I used graduated symbols to label each landfill site, based on amount on incoming waste per year. Will ...
2
votes
1answer
43 views

How can I get rid of feature points within a buffer?

So I've created my buffer, 10 m around surrounding streets, now I need to remove all trees (points) that are within that buffer but I'm having trouble doing so! I've tried clipping but I guess my ...
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0answers
41 views

Buffer FID assignment using arcpy

When buffer analysis is performed on a polygon what determines the order of assignment for FID? This came up with the following: arcpy.Buffer_analysis(inFC, outFC_50, "50 Meters") arcpy....
5
votes
1answer
51 views

QGIS Renders Buffer Polygons from ArcGIS Feature Class Differently

I have a polygon feature class stored in an ArcGIS geodatabase. All of the shapes are buffers of a point layer created using the editor menu's 'Buffer' command. In ArcMap 10.3.1 the data looks like ...