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

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5
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2answers
10k views

QGIS - Create buffer in meters

I'm very new to the GIS world, so my problem could be very stupid, but I'm going to try anyway. Objective Given a list of coordinates in longitude/latitude, stored as a .csv file, I want to create a ...
5
votes
1answer
48 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 ...
1
vote
1answer
221 views

Variable buffer radius in ArcGIS JavaScript API?

I'm hoping someone can help with this, I'm trying to combine the following Esri samples, to end up with the ability to create buffers based on a variable radius, that will then query data within the ...
0
votes
1answer
12 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. ...
1
vote
1answer
40 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 ...
2
votes
1answer
1k views

ArcMap 10.1 - Tabulate Area tool “doubling up” for Overlapping Buffer Zones

This question is related to a previous question I asked: Raster Version of Spatial Join (one to many) I used the Tabulate Area tool to crosstabulate values between an overlapping "buffrast" raster (...
4
votes
1answer
55 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. (...
15
votes
6answers
18k views

Performing reverse clip in ArcMap?

Is there a way to perform a 'reverse' of the clip function in ArcMap? I am not exactly sure how to explain this so here is a diagram:
1
vote
2answers
52 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 ...
2
votes
1answer
267 views

Geoserver not buffering external graphic in PointSymbolizer

We've got some Point data we're displaying in a WMS layer using geoserver 2.2 (same problem on 2.3.1). We style it with the following SLD <Rule> <PointSymbolizer> <Graphic> ...
1
vote
3answers
73 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-...
1
vote
1answer
33 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 ...
2
votes
0answers
42 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 ...
1
vote
1answer
36 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 ...
2
votes
1answer
276 views

Create Centerlines of a Polygon Buffer Feature, ArcGIS 10.3

I have seen another method for this to create centerlines, but that involved splitting the line and deleting the line closures. This is a huge network and the time involved in that would be impossible....
1
vote
1answer
467 views

How to draw circles with a radius based on lat/long data in DB

I have a . sqlite file with many columns, two of those columns being lat and long. I've been searching around for a bit now (don't think I want to be using BuildCircleMbr from spatialite?) but I'm ...
1
vote
1answer
177 views

How to extract information from a buffer in ArcMap

I have a buffer in ArcMap 10 extending from a polyline, with numerous 5 km intervals (multiple buffer tool). I also have many layers already in raster format in ArcMap, including slope angle, geology, ...
1
vote
1answer
30 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....
5
votes
0answers
107 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
56 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 ...
1
vote
0answers
20 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
2answers
64 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
1
vote
1answer
44 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 ...
3
votes
1answer
111 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 ...
6
votes
1answer
156 views

Create buffer based on polyline without line end caps and without dissolving the created polygons in QGis

I have a projected line layer (Shapefile) in QGIS. For every line segment I want to create a polygon without line end caps. The resulting polygone should not be dissolved to a single one. I tried ...
1
vote
1answer
26 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 ...
3
votes
1answer
1k views

How to create buffer on one side of a stream in ArcGIS?

I need to create a buffer around waterfront park sites. But I only want "half" of the buffer --- the "half" that coincides with the side of the water body where to park is. In addition, the buffer of ...
0
votes
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 ...
2
votes
1answer
60 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) ...
0
votes
0answers
39 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 ...
12
votes
1answer
11k views

Understanding QGIS buffer tool units?

I have been trying to figure this out for a couple weeks now and have had no luck getting the buffer tool to accept anything but degrees as units of measure. I have found lots of stuff saying the ...
2
votes
2answers
43 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 ...
4
votes
1answer
39 views

Extracting cell size of Raster as value for buffering using ModelBuilder?

I am creating a model in ArcGIS ModelBuilder to buffer a line. I would like the buffer distance to be based on the cell size of a raster. The cell size may change depending upon which raster the user ...
1
vote
1answer
46 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
0
votes
1answer
34 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
votes
2answers
140 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 ...
3
votes
1answer
79 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
votes
0answers
19 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
19 views

Print Composer Grid Coordinate Buffer

Is there a way to create buffer for grid coordinates in Print Composer? I prefer to add the grid co-ords inside the map but the coords are often overwritten by map data which makes them impossible to ...
1
vote
1answer
28 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,...
8
votes
3answers
178 views

Creating buffer only in specific direction using ArcGIS for Desktop?

I am trying to create a buffer for several polygons in a south-western orientation. As far as I know, this is not possible using the buffer tool (I use ArcGIS 10.3). I could do it manually but for ...
1
vote
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 ...
11
votes
3answers
5k views

How can you tell if ArcCatalog Geoprocessing is still running?

Is there some other way other than the logs to check that ongoing geoprocessing is working correctly? I am running the Buffer tool with dissolve type ALL on ArcCatalog 10.1. I was expecting the the ...
0
votes
0answers
52 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 (...
2
votes
1answer
51 views

Cannot perform buffering loop with arcpy

I have 5 buffers to perform using 5 fields of a shapefile. I try to run it with the following code: Buffers = ['JF1','JF2','JF3','FF','FB'] env.workspace = "C:\Mydirectory\Myfile.shp" network = "C:\...
0
votes
0answers
31 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/...
1
vote
1answer
11 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 ...
4
votes
2answers
602 views

Getting buffer wizard-like speed in Python (vs using MultipleRingBuffer_analysis)

I've got a script that takes a single input polygon feature, throws 10 buffers around it at tenths of a specified input distance, and then symbolises the output based on an existing layer file. ...
2
votes
1answer
34 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 ...
0
votes
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....