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

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4
votes
3answers
199 views

How to compute the outline of multiple tracks?

I have multiple gps tracks with depth data gathered from the lake. The tracks are overlapping/intersecting. I want to get an outline polygon. I have a multi-line shp. I've tried to diffuse it in qgis ...
2
votes
1answer
212 views

create polygons and fishnets of specific size and orientation and buffers

I want to study 6 areas in the field and in order to do so I want to divide each one of them into smaller areas/parts. What I would like to do is find an average square or rectangle area surface ...
5
votes
2answers
448 views

How do the equations/algorithms behind buffering tools actually work?

I've been wondering how the equations/algorithms behind buffering tools actually work?
2
votes
3answers
264 views

Buffer Zone Algorithm

I use google maps, php, mysql, and I want to create a buffer zone in line among some points. Could someone tell me where can i find the algorithm (php library or the math in order to implement it) to ...
2
votes
1answer
268 views

IBufferConstruction create buffer with different geometry types (C# ArcObjects)

I am using the following method in C# public void ConstructBuffers ( IEnumGeometry pInputGeometries, double distance, IGeometry CollectionpOutputBuffers); to create buffers. In the ...
3
votes
0answers
128 views

ArcObjects Memory Leak with IWorkspaceEdit?

I have ArcGIS 10.1 installed. I have created a function for copying all of the features from one shapefile to another using IFeatureBuffer, now every time the function when it is called, it takes ...
4
votes
2answers
167 views

How to achieve “Flat-End” line buffers in QGIS?

I need to buffer a series of lines by 40m, however I only want the buffer to come off the sides and not off either end of the line. I know in ArcGIS there is a "flat-ends" tickbox that achieves ...
2
votes
1answer
172 views

How to creat multiple rings between two circular buffers?

I am working with mathematical-ecological modeling and I am also a new user of QGIS Software. First I am creating 3 circular buffers with same center (shape center) covering a region with roads (shape ...
2
votes
2answers
192 views

Reducing GetFeatureInfo radius / buffer in Geoserver 2.5.2

When clicking some features on the map to get FeatureInfo in OpenLayers i'm getting also info of other near features that i'm not clicking on. I've notice that this is more accurate in GeorSever ...
2
votes
2answers
109 views

Select part of a polygon on one side of a line QGIS

I have a line shapefile of the outline of a water body. It was created by conversion of the polygon to line. I am looking to add a layer of 500m standoff from the shore into the lake. I have added ...
1
vote
1answer
25 views

arcmap mapping information of 2 layers, how to get rid of non-related results

I have 2 layers on the map: 1 drain line layer and 1 segment layer. The segment layer is covered by the drain line layer. Now I want to get the corresponding attribute values on drainline layer which ...
0
votes
1answer
102 views

Intersecting Overlapping Polygons Individually in ArcGIS

Map Layers: -Census Tract Shape File w/Population Data -Set of Store Locations with 5 Mile Buffers (Significant Overlap Between Buffers) I have create feature layers for both and I am trying to ...
1
vote
1answer
43 views

How to find ID's of nearest stations (points) in a specific radius

I am using ArcGIS 10.0 and I am doing rainfall data analysis. I have a single layer including more than 1,000 stations (points) and I need name (STATION_NO) of neighbor stations in more than one ...
-1
votes
1answer
34 views

How to create a buffer from a click on map on ARCMap

I'm searching a way to creating a buffer of a specified radius starting froma a click on the map.
1
vote
0answers
27 views

vb.net arcobjects remove a buffer

I have a function which can select and zoom to a feature, at the same time I will create a buffer around the selected feature so that further more function provided only for the selected feature. The ...
2
votes
1answer
91 views

How can I have as an input for a multiple ring buffer not a single distance but a field?

I have a feature class with points and I need to create two concentric circle with different distances for each point. Moreover the two surfaces do not have to overlap. Can I use "multiple ring ...
8
votes
2answers
2k views

Creating “Inner Buffer” using ArcGIS for Desktop?

I am currently searching for how to create an "Inner Buffer" in ArcGIS for Desktop? I have a lot of polygons (houses) in one feature class, and one big polygon (in another feature class). I want so ...
3
votes
2answers
114 views

Create a buffer with a pre-defined area?

I have a road (line) system and need to create a polygon from it to show the right-of-way area. The right-of-way area is calculated in the field from taking measurements from the road centreline. From ...
0
votes
1answer
118 views

How to create a transparent buffer of a polyline?

I use vb.net arcobjects create a buffer around a polyline feature once it is selected. The problem is the buffer has a obvious colour. Since I have other functions on the selected feature, I cannot ...
2
votes
3answers
97 views

Break down geoprocessing operation (Buffer) into smaller subsets

I have a feature class with 790,000 points (and it is constantly increasing). I need to select some of them (approx. 350,000), and then buffer that selection. Currently, the process runs like this ...
0
votes
0answers
23 views

How do I create a new layer in an ArcPad Map that's a buffer from another layer?

I'm editing code that someone else wrote for an plant species management database. Currently, you have to be holding the GPS receiver inside of the polygon for it to automatically find the previous ...
1
vote
0answers
28 views

Calculating average raster values around set of points using ArcGIS for Desktop (or R)? [duplicate]

I have a 30-m elevation raster as well as a set of points that overlay the raster. For each point, I want to calculate the average elevation within a 5-km radius of the point. One way I was ...
3
votes
0answers
125 views

Performing buffering and intersection with script in PyQGIS

I wrote a script that performs the intersection of two layers: The first Layer -> layer1, represents the rivers The second Layer -> layer2, represents a set of circular dots distributed in a ...
1
vote
1answer
99 views

Specifying output coordinate system in ArcPy

I'm updating somebody else's old Python scripts, and trying to make sure I understand their logic and desired outputs while streamlining the code. In this particular script, it specifies an output ...
2
votes
2answers
98 views

How to create a line output from a buffer instead of a polygon?

I am looking to create a graduated line buffer like in the image attached. I was wondering if there was a direct tool to do this? I can do it in a few steps, but that may take too long. I also ...
1
vote
1answer
51 views

MapInfo incorrectly counting lines intersecting a buffer

I made a buffer for all objects on start and end nodes of polylines then disaggregated them. I then used update table to derive the number of lines intersecting: However this appears to be ...
1
vote
0answers
78 views

Multiple entries in attribute table for multiple buffers using ArcGIS for Desktop?

I am using ArcGIS 10.2.2 to draw 500ft buffers around a group of 133 bars. The numerous buffer tools all produce a single entry in the attribute table for the collected group of buffers instead of ...
-1
votes
1answer
41 views

Buffering algorithm [closed]

Does anyone know the algorithm of buffering? I had difficulty in drawing buffers. So I tried many values to acquire 1km buffer. I found value 0.008966 produces 1km buffer. Then I calculated inverse ...
2
votes
0answers
27 views

Ontario Buildings Data

I am looking for a buildings layer for Ontario, particularly the Chatham-Kent area to properly assess setback for wind turbine development in the region. Currently, I am utilizing the buildings data ...
4
votes
3answers
402 views

Buffering with physical barrier using ArcGIS for Desktop?

I don't think it is possible, but I'm looking for a way to stop my buffer at a certain physical barrier. For example, I have point near a river and I'm creating a buffer around my point that is ...
2
votes
0answers
33 views

Distribute Hotel Beds According to Population Density in Buffers using ArcGIS for Desktop?

I am running an ArcGIS for Desktop analysis where I am plotting competing hotel facilities and then distributing their beds in a 5-mile buffer around the site. I would like to distribute the beds ...
1
vote
1answer
65 views

Sum a field in buffer intersection

I have looked and do not see this answered in any other discussions. Purpose: Site suitability analysis for brewers spent grain processing facility Method: Locate intersecting buffers with greatest ...
1
vote
1answer
122 views

Buffering a PointGeometry in arcpy only returns a line?

I am trying to buffer a PointGeometry object in arcpy to a Polygon geometry object with ArcGis 10.2. The PointGeometry object is in lat/lon WGS84 coordinates and as far as I understand, I can only ...
1
vote
0answers
110 views

Way to split and create buffer space between polygons in QGIS or ArcMap

After performing a feature extraction of rooftops, some of my buildings have been joined together as one polygon. I want to split these large polygons so that each new division is only covering one ...
3
votes
2answers
318 views

Performing statistical analysis of buffers?

I am doing a buffer analysis of incinerators and looking at the output areas within those buffers, is there a way of doing a statistical analysis of several buffers to see if there is a significant ...
9
votes
1answer
5k 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 ...
13
votes
4answers
3k views

How to create one-sided buffers or parallel lines in PostGIS?

I'm looking for a way to create so-called one-sided buffers or parallel lines in PostGIS. Example: 1. buffer, 2. one-side, 3. both-sides I've found some discussion on the mailing list from 2009 and ...
13
votes
4answers
11k 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 ...
4
votes
1answer
1k 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 ...
0
votes
0answers
84 views

how to remove a point or polygon in shapely python

I want to place minimum number of sensors(circles) to cover a maximum area(polygon). I am using "Shapely",python module. I want to know if a sensor i.e a point buffer inside the range of the other ...
1
vote
1answer
39 views

How to adjust the projection of a buffer?

I'm using ArcGis 10.1, and when I do a buffer at a point, the created buffer do not match the dimensions I asked for. For example, in the creation of buffers, in the option 'linear unit' I choose 50 ...
0
votes
1answer
146 views

Creating a 10-mile radius buffer zone that averages a variable in my shapefile?

I´m trying to create a "buffer zone" for every polygon in my shapefile, which will identify a 10 mile radius around the centroid of each polygon, and calculate the AVERAGE "demand for services" (one ...
0
votes
0answers
259 views

ArcGIS Circle Buffer

I am stuck, trying to draw a simple circle buffer using ArcGIS. Here is how I set up my base map: dojo.require("esri.map"); dojo.require("esri.tasks.servicearea"); dojo.require("dijit.dijit"); ...
3
votes
1answer
278 views

How to create a buffer on a linestring with varying or increasing/decreasing width

I want to buffer rivers/streams for a topographic map. I'm using a PostgreSQL/PostGIS database. Usually, I create buffer with ST_Buffer with a constant width. For example, the width of a river buffer ...
1
vote
1answer
115 views

What is the minimum buffer zone to get a certain amount of points within the zone?

I have one map with lines and another map with points. I want to find the distance of the buffer zone to be such so the amount of points that are in the buffer zone to reach a certain number. For ...
2
votes
1answer
316 views

Python add-in won't buffer from output layer

I have a simple add-in script for Arcmap 10.1 to create a toolbar, select a layer from a drop down list of the current layers in the project, buffer that layer four-miles, then use the resulting ...
-1
votes
1answer
58 views

ST_buffer display creates big circle [closed]

$result = pg_query("SELECT ST_Astext(ST_Buffer(ST_GeomFromText('POINT( 80.7605 7.67833 )'),1))"); ST_buffer display creates big circle..
2
votes
1answer
152 views

Buffers with Varying Distances around a Set of Points

I have set of points in one shapefile and I have a table with a unique identifier that matches each point. I want to make a buffer around each point, according to the radius that I have specified in ...
1
vote
1answer
109 views

Buffer from Field using Different Unit

Is it possible to create a buffer polygon using an attribute field which is in different units than the feature class coordinate system? Example: I have a field that stores distances in miles (double ...
2
votes
1answer
31 views

Applying distance/area dependent procedures in geographic coordinates over large areas?

I'm currently doing some niche modelling with data in geographic coordinates spanning all of Latin America. I am using R for my analysis. Some of the tasks I have to perform are area/distance ...