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

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1answer
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....
2
votes
1answer
274 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> ...
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 (...
1
vote
1answer
37 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 ...
0
votes
2answers
765 views

How to calculate average NDVI values for buffers in ArcGIS?

I would need to calculate an average NDVI value for each buffer among everal hundred buffer-areas. The buffer areas are built around observation points. I have all buffer areas in one .shp file and ...
1
vote
0answers
22 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
votes
0answers
13 views

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

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 ...
1
vote
2answers
52 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 ...
0
votes
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
votes
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....
1
vote
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 ...
1
vote
1answer
33 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 ...
2
votes
1answer
312 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
484 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 ...
19
votes
4answers
20k 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 ...
16
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:
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votes
1answer
90 views

Using ArcPy to select buffer line by length?

I created a buffer, then converted polygon to line (around a city block). I want to select the internal line. I'm thinking since there is no uniform way that ArcGIS labels the interior or exterior ...
0
votes
0answers
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 ...
0
votes
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 ...
4
votes
1answer
245 views

Buffering selected polygons within same feature class using ArcGIS Pro?

The limitation below applies only to ArcGIS Pro versions 1.0 - 1.2. When editing in ArcMap a workflow I used to create a polygon feature with a donut polygon in the same feature class around it was ...
2
votes
0answers
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 ...
5
votes
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
votes
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 ...
-1
votes
0answers
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 ...
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
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 ...
1
vote
0answers
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))))....
5
votes
2answers
11k 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
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 ...
1
vote
1answer
229 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
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. ...
1
vote
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 ...
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
vote
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 ...
1
vote
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-...
1
vote
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 ...
2
votes
0answers
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 ...
1
vote
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 ...
1
vote
1answer
181 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
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....
5
votes
0answers
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 ...
1
vote
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
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
1
vote
1answer
49 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
120 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
163 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
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 ...
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
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) ...