A region enclosing a point, line, or polygon at a specified distance.
0
votes
0answers
6 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?
2
votes
2answers
51 views
buffer operation of polygon 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 5km and 0.0454545 degree decimal (assuming 1degree=110km). I ...
4
votes
1answer
66 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 ...
0
votes
1answer
27 views
How to fix buffer selection issue in ESRI ArcGIS Javascript API and LGIM applications
I had strange LGIM application behavior where the map spatial search did not highlighted the parcels within the Geometry Buffer. What could be the possible reasons?
LGIM stands for the Local ...
0
votes
0answers
40 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
0answers
23 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
36 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
43 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
51 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 ...
4
votes
3answers
3k views
Creating a square buffer around a point feature in ArcMap
I would like to create a square buffer from a point feature. I do not understand the code that gos into it. This similar questions as asked on the forums.esri website but that was over 10 years ago. ...
1
vote
2answers
62 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
1k 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
54 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 ...
4
votes
2answers
144 views
How to join number of point features into attribute of nearest line segment
I have point shapefile with lot of attributes, that represent road accidents and line shapefile with highways. What i want is to join attribute into line shapefile with value, that represent number of ...
2
votes
0answers
268 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
1answer
128 views
How to Hide InfoWindow/Popup when “no information available” or when buffering?
I have an app that does some buffering, only problem is when I click on the map to put in the point/line/polygon vertices to do the buffer, I get popups at every mouseclick. It doesn't interrupt the ...
1
vote
0answers
38 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 ...
3
votes
2answers
65 views
Buffer of different radius - Intersect with raster
I have a polygon shape with buffers. However, the buffers are of different size from 4m radius to 15m. In total I have 7 different buffers.
I have a landcover raster and I would like to extract ...
1
vote
1answer
50 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
57 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
33 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 ...
0
votes
0answers
29 views
Keeping attribute values in overlapping buffers
I am creating a buffer around salt marsh polygons of 275 meters. Naturally some of these buffers overlap. Prior to the buffering, each salt marsh had been given a score. I would like a) that that ...
1
vote
1answer
62 views
Create buffer around point in LeafletJS?
I am using LeafletJS. I want to create buffer around point. after Selecting a point buffer radius will be specifed by user in feet.
After searching of awhile I found this link of JSTS. does JSTS ...
6
votes
1answer
202 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
56 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
88 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
56 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
72 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 ...
6
votes
2answers
564 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
1answer
169 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 ...
4
votes
2answers
169 views
PostGIS algorithm to unite points of two geometries that are within specified radius
I want to find an PostGIS algorithm to unite points of two geometries that are "near" to each other.
That is: I want a function, that takes as input two geometries, and returns 1 geometry, that ...
3
votes
1answer
168 views
How to Get the Three Nearest Points to an Object (different layer)?
I have two point shapefiles and I want for each point in the 1st shapefile to get the 3 closest (based on air distance) points from the 2nd shapefile.
If possible, it would be great to have each of ...
6
votes
2answers
335 views
What's the Workflow for buffering in meters/km using WGS84 layers?
I'm a little bit new to GIS, so bear with me a minute....
I'm using QGIS 1.7.4-Wroclaw and working with an SHP layer in WGS84. I want to buffer out to a certain number of kilometers from this layer ...
1
vote
1answer
166 views
Create buffer-lines in QGIS alongside Vector lines
I am currently doing a map of a farm, to see which roads needs to be repaired.
Those roads are either one sided fenced, on both sides fenced or not fenced at all. I want to make buffer lines around ...
0
votes
0answers
70 views
trying to make a point to polygon attribute join with a many to many match
I am trying to match US charter schools to noncharter schools in QGIS. I have constructed a buffer of 10 miles around each charter schools and then tried a join attributes by location match with non ...
0
votes
2answers
353 views
How to remove overlapping buffer in QGIS?
I wanna know how to do this in QGIS:
I've tried many ways, but still can't find the right solution.
4
votes
0answers
102 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. ...
5
votes
1answer
178 views
Geodesic buffers for polygons
How can I create geodesic buffers around polygons? I'm on 9.3.1 ArcMap, but I need a programatic solution.
IBUfferConstruction only does geodesic buffers for points.
What are my options?
0
votes
1answer
75 views
Creating rectangle over a buffer circle with specified angles/rotation?
I have a layer that is a circle buffer around a point. What I want to do is create a rectangle around the circle, but have every rectangle be perfectly lined up N/S (0degrees of angle/rotation). I ...
3
votes
3answers
497 views
Is it possible to create multiple buffers using QGIS?
I'm new to QGIS and have no programming skills, is there an easy/uncomplicated way to create multiple buffers around a line feature.
4
votes
2answers
285 views
How to invert a Buffer(get the inside of a ring buffer)?
I have a line layer of a road network around which I create a buffer zone of 1000 m with Analysis Tools>Proximity>Buffer. But I am
interested in the areas outside the buffer zone, and not the buffer ...
12
votes
2answers
476 views
ArcGIS Buffer accuracy problem
world,
once again I encounter something very strange with ArcGIS. I perform a buffer analysis on one side of a polyline. There seems to be a serious accuracy problem and I can't figure out what the ...
9
votes
4answers
506 views
How to buffer in pyQGIS?
I'm looking for some examples to do simple python scripts in QGIS. How would I do a buffer analysis on a dataset?
I can't seem to find much in the manual and QGIS python that quite matches the Esri ...
5
votes
2answers
302 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
1k views
find location details within circle buffer
Wondering how would i go about getting this to work.
I have a table with location data (lat, long, homevalue) in sql server 2008. Given a lat long say (32.113, -81.3225), i want to draw a 50 mile ...
1
vote
1answer
143 views
How to fit a polygon to a “best buffer” about a reference geometry in it?
If I have a polygonal geometry gbase, like a street (a rectangular strip), and a reference geometry gref, like a central line of gbase. The question is what is the function (here named BestBuffer) ...
3
votes
1answer
162 views
FME remove polygon holes of under size ### sqft and chop the ends off
Quetion #1
I have a wokspace that takes the latest version of my data and creates buffers and then merges those to one polygon.
When 2 buffer polygons are near each other and close to create a hole. I ...
4
votes
1answer
159 views
How can I create a pollutant dispersion raster in QGIS?
As my previous questions have indicated, I am working on an air quality problem where I have a dataset of industrial emissions that consists of a location (long, lat), and an annual volume of ...
5
votes
1answer
107 views
How do I find location of minimum value within a buffer (around a point)
I have a digital elevation model (DEM) with a point location defined.
I want to locate the lowest height values at a set distance from this point.
I envisaged creating a buffer around the point ...
5
votes
3answers
325 views
Is it possible, in QGIS, to create buffers with a set radius, but with individual values taken from the attribute table?
I am looking to create an output that consists of an 11KM buffer around a number of discrete points, where the buffer has a value defined by a column in the data sets attribute table. Is this ...
