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

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239 views

How to create buffer around point having projection 4326

I am trying to create buffer (in meters) around point(long lat alt) which is in projection 4326 with below code. But it is not giving expected output. SELECT ST_AsTEXT(ST_Buffer((ST_GeomFromText('...
2
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0answers
34 views

Buffer for network roads in QGIS [duplicate]

How can I create "buffers" or vector from values ​​from a layer of points, where the "buffers" are "tied" to the streets? Example: A bus station, I would like to create vectors within 100 m range ...
4
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1answer
230 views

How to Buffer selected polygons within same feature class using ArcGIS Pro?

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 to: Digitize the polygon Use the Buffer from the pulldown on the ...
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0answers
78 views

Displaying buffer around feature using population values in ArcGIS for Desktop?

I am working on a project that is about park accessibility. I wanted to display a buffer from a park that shows potentially 3 acres/3000 population. I am using Census tract data and I have a shape ...
3
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1answer
1k views

How to obtain statistics within a Buffer/Catchment in MapInfo?

I need to calculate the population statistics within a 10 minute drivetime catchment from a point and within 1 Km Buffer from a point in MapInfo, how can I do that can someone please elaborate? I have ...
2
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23 views

Grid buffer in QGIS [duplicate]

I do have a raster file (grid) which I have processed before with the SAGA kriging tool. Is it possible to buffer this raster file a little bit (expanding the interpolated result) of 1 or 2 grids? I ...
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1answer
43 views

Ways to reduce buffer if it passes through a certain layer

I am trying to do WiFi analysis on signal strength in ArcGIS Desktop, and one of the big problems that I am running into is how to reduce the signal when it comes in contact with a wall, as it does in ...
3
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2answers
907 views

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

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 ...
10
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2answers
406 views

Create area buffers that are limited by a coastline

I'm trying to use ArcGIS 10.2 to create a buffer of points based on a pre-defined area (e.g 400 sq km). Further to that, the buffers of some of the points are close to the coastline that requires the ...
2
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0answers
75 views

QGIS 2.12.3 Crashes on buffering line vectors

I'm using QGIS 2.12.3 and I'm trying to create a buffer of 100 mt around a line vector using the Vector - Geoprocessing Buffer tool, but qgis crashes at every try. I've already checked that the RS of ...
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2answers
129 views

Inaccurate Buffer Distances

When buffering a point, the result is inaccurate to the basemap. I specify a 200 foot buffer around a point however the resulting buffer has a distance from the point of about 260 feet. Both the ...
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31 views

Batch zonal statistics from overlapping buffers in ArcGIS for Desktop?

I am trying to come up with an isolation index for islands in a lake. I started by generating a binary water/land raster of the study area. I would like to know the proportion of land to water ...
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vote
1answer
255 views

Creating buffer around WFS features to ease their selection in OpenLayers 2?

I'm using a WFS SelectFeature from OpenLayers 2 to show a Popup containing the features' attributes from line layers and point layers (from GeoServer). This works fine, but I would like to create a ...
4
votes
3answers
2k views

Summing attributes intersected by under a radius

Apologies - new user. I am working with QGIS on Mac OS X and with shapefiles downloaded from the US Census Bureau that show population data by state and by county. How do I: select certain points (...
0
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1answer
22 views

Is it possible to create a KML to list the road names within a buffer?

I often need to know the road names within a given buffer of a polygon. Is it possible to create a KML that would stick a push pin in the roads and list the name so I could see them all in a drop down ...
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0answers
46 views

Multiple Selection Buffer OpenLayers

I want to draw multiple buffer selection on click so that each selection is saved in a different vector layer and buffer features in one vector layer. The following code works well for the first ...
1
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1answer
27 views

Creation of buffer area of 20mtrs upon click event on the base layer

I have a base layer upon which i wish to import a kml with certain lat lons and create a buffer region of 20mtrs around any point upon click event. i got google api for the same but want openlayers ...
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3answers
2k views

IFeatureBuffer - performance considerations (ArcObjects)

I'm trying to optimize my code to make it faster. I have a loop that reads some string input and creates points with the help of IFeatureBuffer and IFeatureCursor. If I create the buffer inside tho ...
2
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1answer
4k views

Dissolving two different buffers together so not overlapping using ArcGIS Desktop?

I am trying to find out how many registered sex offenders live within 2,000 feet of a school/park in a specific county. The park buffer and school buffer are dissolved but not together. I am also ...
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1answer
415 views

Minimizing error when buffering unprojected data in ArcGIS Desktop?

If I buffer hundreds of unprojected WGS84 points across the US by say, 3 miles, will I get accurate areas returned (3 x pi x r) for each of the circles created? I suspect not. If not, what would be ...
0
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1answer
350 views

Generating report or table for buffer zone using ArcGIS Desktop?

I have a polygon feature class. I create a buffer for this feature with a distance being 2 km. Now the buffer output intersect with features of the original polygon. So say for instance from the ...
2
votes
1answer
114 views

How to reclassify multiple ring buffer using ArcGIS ModelBuilder?

I want to automate some simple procedure in ArcGIS 10.1: create a multi-ring buffer around a point at distances 500, 1500, 2500, 3000, 10000 m. convert to raster reclassify the multiple ring raster ...
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0answers
49 views

Cannot generate buffers in meters (even after “save as” in NAD83 / UTM 18N) using QGIS?

I am quite new to GIS and QGIS. I have 800 points with lat/lon (some locations in Massachusetts) in a .csv file. I use AddLayer to import the CSV file and save it as NAD83 / UTM 18N projection (EPSG:...
7
votes
2answers
123 views

Creating a point on edge of closest polygon

My project is looking at a grid in the ocean. I want to capture each ocean point's distance to the nearest coastline as a weight, and then use buffer to capture the sum of nightlight data within a 1 ...
0
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1answer
43 views

ArcGIS - Make colour gradient in street network shapefile accordingly to buffer distance from central points (bus stops)

I need to do a colour gradient in the street network shapefile (cyan selection in the map attached, in a layer) accordingly to the distance from the points in the other layer (the more distant, the ...
6
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3answers
101 views

Select all polygons that are completely within a circular buffer

I made several buffers around some points. Now I want to select all polygons that are completely within this buffer. My problem is that I also get the polygons that are partially outside of the buffer....
2
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1answer
33 views

ArcGIS Buffer tool leaves out zero width buffers?

I have a polygon shapefile with 93 objects in it. They have a column with values for the buffer distance. 90 of these objects have 5 as a value, while the remaining 3 have 0. When I use the buffer ...
4
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0answers
68 views

Buffer neighbouring polygons without overlap using QGIS

Is it possible to create a buffer around neighbouring polygons, so that the new polygons do not overlap? Preferably in QGIS but any other tool will do. So instead of the first result I would like ...
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29 views

How to Find Source and target using STBuffer And STIntersects in SQL Server?

I am using this query to find the source and target from Routes table, but it's not getting the correct result SELECT TOP 1 a.target FROM Routes a WHERE (ROUND((geometry::Point(73.0135494838,19....
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72 views

Create Right of Way from Street Centerline file

I have a project where I would like to take all of the right of way areas in a county and categorize them based on type/ownership (state right of way vs. county vs. private and maintenance ...
2
votes
2answers
64 views

Is there a way to select all items within a circular buffer?

I want to select all the items within a circular buffer. Inside the buffer are multipolygons and multipoints. See the screenshot i have posted.
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1answer
515 views

Arcpy.Buffer_Analysis Does Not Create Feature Class

import arcpy arcpy.env.workspace = r'c:\data' fcs = str(raw_input('Please enter the layers you would like to buffer: ')) dist = str(raw_input('What would you like your buffer distance to be? ')) ...
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46 views

Select points greater than a certain distance from related points based on shared foreign key id

I have a PostGIS-enabled PostrgeSQL db, using QGIS, with data using EPSG:4326, and projected as EPSG:29903. I have a table with points with pk point_id and a table with images with fk point_id. I want ...
1
vote
1answer
37 views

Tabular Intersection producing Empty Output Why?

I am trying to run a Tabular Intersection on ArcGIS 10.2.2 between a 1000m buffer and a forest layer to establish the percentage cover and total area of trees within the buffer areas. Everytime I run ...
0
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2answers
98 views

How to create circles starting with points and attributes (diameter, lat/long)?

I have a point shapefile with attributes (diameter, latitude and longitude). For each point in that file, I want to create a polygon (circle) described by those attributes. The new shapefile should ...
1
vote
1answer
140 views

arcmap buffer geoprocessing range error

When I tried to create a buffer layer around a polyline layer. But I got the error as follows: The input was outside a +-360 longitude range or outside +-90 latitude. The input is : dev_db.DBO....
3
votes
3answers
76 views

Circle created using ST_Buffer displays elongated on map

I am buffering a point to create a circle in PostGIS like: ST_Buffer(geo::geometry, .0002, 8) However, when displaying the polygon in Bing maps it ends up a vertically oriented ellipse or elongated ...
0
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1answer
55 views

Select points from Buffers in ArcMap?

I have a buffers and I want to select all points within each of the buffer and output it as a table. That means one buffer may have 0 to about 10 points in it. I have tried spatial Join and intersect ...
1
vote
1answer
35 views

Help using ST_Buffer for points

So I am trying to do a where clause on a select and my code is ST_Within(shape::GEOMETRY, ST_Buffer(ST_GeogFromText('@Value(_location)'), 5, 'endcap=round join=round') I am trying to buffer the ...
1
vote
1answer
42 views

Arcobjects ConstructBuffers produces Error -2147220889?

I use the Esri-function ConstructBuffers in my arcobjects program. The call of this method produces a Error with code -2147220889. Looking up the error constants it says: ...
5
votes
2answers
960 views

Creating polyline buffer with ArcPy?

I'm trying to write a python script with ArcPy that draws arcs and I've achieved something with creating a buffer and then clipping it with a bounding box so I only keep the length I need (I thought ...
3
votes
1answer
172 views

Speeding up extraction time of proportion of land cover types in buffer from raster using R?

I would like to extract land cover data in a buffer of 10 km around objects of class SpatialLines and calculate proportion of each land cover type. So, I used the function extract (package raster). I ...
4
votes
1answer
108 views

Using each feature of vector layer as clip mask over separate point layer, storing results in either a Python list or in-memory scratch layer

I have a point layer (representing cities), and a set of vector layers whose features are hundreds of concentric discs, each of which I'd like to use as a clipping layer to select only the cities that ...
0
votes
1answer
76 views

Increasing size of buffer based on field in ArcGIS for Desktop?

I am using vector data from a CSV file and ArcGIS. I can use the Geoprocssing tool Buffer just fine, I use these parameters and ArcGIS does produce what I want, however it is way to small (my ...
3
votes
2answers
114 views

Extracting Overlapping Parts of Single Polygon Layer using QGIS?

I have a single polygon layer with over 200 buffers with a lot of overlapping areas. I want to use QGIS to create a new layer representing the overlap. I've seen several questions that are similar, ...
2
votes
2answers
350 views

how to extract overlap from non-dissolved buffer zones in qgis 1.7.4

I have a shapefile with the inventory of all limetree in a region. I made a buffer around each tree. So, the place where buffers overlap each other is the best place to put beehives. Is there a way ...
7
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3answers
4k views

When should I use ST_Buffer?

I would like to know what is the sense of using st_buffer operation. In PostGIS reference guide there is only the syntax and a short description of this operation. Could you give some examples to ...
2
votes
1answer
64 views

How to calculate proportion of a line segment around a point?

I am looking at certain variables surrounding points that represent Sea otter raft sites. The coast line surrounding the points is broken into unit lines (Essentially a polyline with attributes for ...
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0answers
51 views

Buffers not showing on map but viewable in Table of Contents of ArcMap?

I am completing Assignment 9-2 in GIS Tutorial ArcGIS 10.1 Book. I am suppose to set the map to a UTM for California (either 10N or 11N). I am then suppose to add a California Counties layer and ...
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0answers
41 views

ArcPy to select the location of two layers

I am very new at using python for geoprocessing I have a buffer layer 1 with a distance of 5 from each point I have a buffer layer 2 with a distance of 1 away from each polyline How do I show all ...