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

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2
votes
2answers
174 views

How to use IFeatureCursorBuffer in VBA

I tried to use IFeatureCursorBuffer to create and dissolve the buffered features.I am trying to get the solution since some days using dissolve and UnionOverlappingBuffers, but not being able to get ...
2
votes
1answer
106 views

Is it possible to automatically update a Buffer FeatureClass when creating new features?

Is there a way I can update the results of my Buffer analysis? I have a roads FeatureClass, and I've built a buffer for it. I will still make edits to the road FeatureClass. Let's say I add a new ...
9
votes
1answer
253 views

Proximity in space and time

I have some point data which represent daily lat-lon locations of an animal, with an associated timestamp. I would like to identify all points where STATIONARY = TRUE. A point qualifies as being ...
0
votes
0answers
24 views

Possible to automate Buffer Wizard in ArcGis 10.x by working in the Shell? [duplicate]

I'm trying to automate the Buffer Wizard since I have several large sets of the data that I need to buffer at multiple distances. Doing it by hand will take a long time and be quite tedious, but I've ...
6
votes
2answers
705 views

How to create an oriented buffer using arcpy?

I would like to create an oriented buffer for every polygon in my shapefile using arcpy. By oriented I mean that I have two angles a1 and a2 that constraint the direction of the buffer. This is ...
1
vote
0answers
150 views

Why does the buffer tool keep producing ellipsoid when I want a circle?

I want to create a 50 mile radius around a point. I've got the point as a layer. I've run the buffer tool found in Vector -> Geoprocessing Tools and set the distance to 0.5. Every time I run the ...
0
votes
1answer
111 views

Why does my buffer take up the entire screen?

I am using QGIS. I am aware there is a similar question here but the solution (changing the layer CRS) is not working for me. I cannot change my CRS as I am using information for the entire ...
3
votes
1answer
3k views

creating a buffer in a raster layer

I've got a raster layer separated into 3 zones, representative of marine park zones. What i'm trying to do is make it so that where zone 1 is adjacent to zone 3, there is a "buffer" between them, of ...
8
votes
1answer
2k 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 ...
1
vote
0answers
181 views

How to create a buffer around a point that takes terrain elevation in account?

In QGIS, I am creating a few different buffer around points to simulate walking distances. For example, 10 minutes walk about 800m at 5km/h. Using population density, I then clip a population layer ...
5
votes
3answers
2k views

Dissolving polygons by attribute and in a certain distance (ArcGIS)

in a FeatureClass I have a lot of polygons which contain attributes of different landuse-types. Now I am trying to dissolve those polygons of the same landuse-type, but only if the distance between ...
3
votes
2answers
558 views

How to do a Point to Polygon analysis with multiple variables?

I have a database of almost 10k crimes, which are divided in to 10 categories and plotted on a map I also have a database of 12k addresses, which are also plotted on the map. I aim to perform a ...
2
votes
0answers
51 views

Distribute population to health facilities (GP Practices)

I have been using GIS (ArcGis) for some years but I do not consider myself an expert. I am performing some analysis around GP Practices in London (UK), I would like to be able to estimate the ...
2
votes
1answer
1k views

ArcGIS Server js api - buffer query against polygons and not points

I'm using the below sample and i want to change the queried results from points to polygons http://help.arcgis.com/en/webapi/jav...ry_buffer.html Probably very simple but cant get my head around ...
3
votes
1answer
112 views

How to select polygon close to each other?

I have grass patches and I put a buffer of 250m around them. I did a "dissolve to get larger polygons that overlap, but the attribute table emitted a lot of information, which are important such as ...
2
votes
2answers
246 views

Why does the buffer take up whole screen?

I am trying to create buffers around the Hurricane Sandy path I created in QGIS (points are lat/long). I have both points from each day she was tracted and the line I created from it with Points2One. ...
2
votes
0answers
122 views

Large buffers in PostGIS (5000 km radius)

I have a number of points stored as geographies in PostGIS (version 2.0.1), and I'd like to create rather large buffers around them (with a radius of 5000+ km). However, ST_Buffer doesn't handle this ...
2
votes
2answers
977 views

How to set linear units for Buffer distance from arcpy.GetParametersAsText()?

I am trying to run a buffer tool as part of script that I will both use as a standalone script and import into ArcToolbox. I'm just wondering, if I use GetParametersAsText for the buffer distance, how ...
2
votes
2answers
785 views

How to create an accurate 5 km buffer in ArcGIS 10.1?

I need 5 km buffer of a basin boundary of Brazil using ArcGIS 10.1. The basin boundary is in GCS. I have tried it giving buffer distance 5 km and 0.0454545 degree decimal (assuming 1degree=110km). I ...
1
vote
0answers
51 views

Creating sign locations from an existing database with offset & dist to nearest intersection (buffer analysis)?

I have a database of 22,000+ signs that contains the offset from centerline along with a distance to/from the edge of pavement to a specific intersecting road for each sign. I also have a street ...
1
vote
2answers
454 views

How to extract all lines that do not intersect with buffer?

I am working in ArcGIS Desktop 10.0 and/or 10.1. I have two road network feature classes in a file geodatabase. I have created a 5 meter buffer around the first one, so it is now a polygon feature. ...
1
vote
1answer
290 views

Buffer along a route

I'm using Googlemaps service to plot some marker on the map. All markers are stored in a postgresql table, named "locations" and that has a location column (data type to geometry). When the user ...
1
vote
1answer
171 views

Add buffer only on one specific side of polygons

I have a shapefile with multipart geometry (multipolygons), namely communities (blue on the picture below). There are also lakes (white), but for these I don't have a geometry, they're just "empty". ...
0
votes
1answer
347 views

Extract values using buffers - Equation

I have run a linear regression and obtained an equation that describes the link between a group size and the area used by this group. Now, I would like to enter this equation into the GIS to obtain ...
1
vote
0answers
101 views

How to spatial join points attributes to layer with two (or more) overlapping buffers in QGIS?

I'm working with QGIS 1.8 and I've got 3 layers : 2 points layers, and 1 layer composed of the buffers of one of the points layer. I'd like to retrieve the informations, for the point layer that ...
7
votes
2answers
1k views

projection change to create buffer in QGIS

I am about to become desperate... I like to create buffer around several points - if possible - with a declaration of the size in km of these buffers. Just to show you what I am working with: My ...
1
vote
0answers
25 views

Creating a buffer based on area (i.e. sqm) instead of distance [duplicate]

Is there a way in ArcGIS 10.1 or QGIS (or any add-on) to create buffer based on an area (i.e. sqm) rather than using buffer distance? I'd like to create a buffer of let's say 5% of the area within the ...
4
votes
2answers
456 views

How to delimit hinterland boundaries among multiple city centers?

I need to delimit city boundaries basing on centers'magnitude. CenterA's employment/CenterB's employment = (Distance from centerA to break-point E/Distance from centerB to break-point E)^2. AB=AE+BE. ...
0
votes
1answer
292 views

Can osm2po produce a travel distance buffer for a given time?

Given a starting point and a travel time, I would like to produce a travel distance polygon. Can I request this from osm2po via http?
3
votes
1answer
250 views

How to represent Typhoon(s) wind speed using Quantum GIS / PostGIS?

I am not completly new to GIS (was taught ArcGIS at Uni) but I would still consider myself (especially compared to all these experts here) a newbie in QGIS or PostGIS. I want to display the ...
4
votes
1answer
1k views

How to create fixed length (and width) buffer around a polyline in ArcMap 10?

Could someone please help me? I would need to create 100 buffers (500m x 1km) along a stream polylines. I know how to do it by using shortest distance but the buffers should follow the curves of the ...
1
vote
0answers
183 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> ...
0
votes
1answer
418 views

Extraction of raster cell values based on 'rgeos' and 'raster' buffering approaches in R

I am trying to extract cell values from a raster that lie within a certain distance from a given location (i.e. buffering). Evaluating different approaches, I found out that applying gBuffer(..., ...
2
votes
2answers
246 views

How to calculate land cover inside the buffer zones?

In one Shape file I have created 1200 buffer zones Around coordinates. I created a field and calculated the buffer zones area in hectares. Then I clipped different landcover layers to the buffer ...
1
vote
1answer
229 views

How do I convert MultiLines to MultiPolygons using Postgis

In postgis I'm using the following query to buffer lines to polygons: UPDATE rivers SET poly = ST_Multi(ST_Buffer(lines, 0.01)) where id = 1; The column 'lines' is a MultiLine and the column ...
1
vote
2answers
75 views

Plotting a circle on a Web map to view the resulting coverage over a central location

Not exactly a GIS question but I hope no one will mind. Does anyone know of a website (something equivalent to Google Map) where you can indicate a location, give a radius and you can view the ...
4
votes
3answers
3k views

Conflicting measurement units with buffer ftools

I am new to qgis and I would like to create a buffer around point features. My goal is to create a quarter mile buffer (402.336m) around each point feature, using Geoprocessing Tools -> Buffer(s), ...
1
vote
1answer
179 views

Need to make a buffer around a part of a feature, keeping other features attached

Basic problem: I have two layers, a layer containing river basin outlines and a layer of wetland outlines and types. I need to make a buffer around one river basin, and then create 100 random points ...
2
votes
0answers
320 views

Proximity Toolset Questions - Description, Examples of Usage, and Limitations

I was wondering if you could help me answer a few questions about the Proximity Toolset. I have been given the task of describing each tool in laymen terms, the typical usage of each tool, and most ...
1
vote
0answers
84 views

Clipping Buffers

I have buffered a line shapefile where many lines are intersecting but not broken at intersections. I am trying to select each record in the buffer file and clip all intersecting polygons in the same ...
1
vote
1answer
100 views

problem of buffering a point on large areas with a projected coordinate system

could someone clear this up for me please. i remember reading an article not long ago on the web about the problems associated with buffering points on a globe due to the fact that a globe uses angles ...
0
votes
0answers
178 views

Offset a Polygon defined in Lat Lng points by a given distance of miles or km

I am trying apply a positive offset/buffer (enlarge a shape equally from the borders) to a polygon that is made up of a series of latitude/longitude coordinates by a distance that is defined in either ...
2
votes
1answer
76 views

Clipping a buffer from network analyst shapefile to a base shapefile

I have exported my polygon shapefile which I got after I ran my Network Analyst into a shapefile. It has 6 buffer zones (delimited by time in increments of 10 minutes). When I check the attribute ...
6
votes
1answer
565 views

QGIS define hexagon area around mapped points

I am using QGIS to map a number of radio antennas (for mobile network). Once I have the layer of the sites (done), I would like to assign to each site a coverage area (envelope). I could achieve that ...
2
votes
1answer
110 views

How to create a buffer zone for notification

I am new to PostGIS. I am working on a project, for this i need to find out abutter notification that generates a list of properties within the buffer zone from the selected property with user input ...
4
votes
1answer
269 views

Distance from waterways

I have an sdc file with water bodies, i.e. oceans-rivers-lakes. I want to combine it with a shapefile with the boundaries of countries all over the world and produce two measures: 1) The average ...
1
vote
2answers
252 views

3D elements buffer extrusion

I'm using ArcScene10.1 and I have a dataset containing of 3D points (x,y,z coordinates) with extrusion values (Evalue). Now I would like to create a square or ring buffer around the points and extrude ...
1
vote
0answers
211 views

Clipping points using buffer in Arcmap takes FOREVER

I'm clipping points (crimes) by using a buffer around a shapefile of city parks. There are quite a few records involved (2 million+), but it is still taking forever - as of now, the clip has been ...
8
votes
2answers
1k views

How to buffer a vector shapefile using ogr python?

I am trying to learn how to use ogr in python using the country and populated places datasets from http://www.naturalearthdata.com/downloads/50m-cultural-vectors/. I am attempting to use filters and ...
2
votes
0answers
370 views

Multiple ring buffer on point-shape error

I need to calculate multiple ring-buffers, but every time I try, arcgis produces a failure: Executing (Multiple Ring Buffer): MultipleRingBuffer Y:\GIS\RDY\clip\sn_clip.shp ...