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

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13 views

Drawing “proportional” buffer using QGIS?

I'm working on aquatic vegetation and have a shapefile representing floating vegetation in a lake. By some studies, we know that submerged vegetation extends for a certain extension based on floating ...
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0answers
15 views

How to create buffer around points stored in PostGIS and served through geoserver

I have a PostGIS database with a table with point geometry. I am showing these points through Geoserver using OpenLayer2.13. What I want to do is to create a buffer around these points. How can I do ...
5
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3answers
2k views

Dissolving polygons by attribute within certain distance using ArcGIS Desktop?

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 ...
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2answers
162 views

How can I calculate how many of a certain feature lie within my various buffer rings?

I am using ArcMap and I have a series of real estate parcels mapped along with a series of wind turbines. I have created multiple buffer rings around each real estate parcel with distances (0.5, 1, ...
5
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1answer
84 views

Cutting a circular buffer via Arcpy

I am currently working with compressor stations on centerline routes. These compressor stations have a 3 mile buffer surrounding them. I wish to cut a portion of the circular buffer off. These cut ...
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0answers
15 views

How to create new field using the values of one attribute column multiplied by a constant number in Qgis or ArcGIS [duplicate]

I have point data that has a small length attribute - I want to times this length attribute by a constant number (I need to trial a few different constants) to find the diameter of a protection zone ...
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0answers
49 views

Using custom shape files as buffers in ArcGIS [closed]

I would like to use a custom shapefile as the buffer shape for a project that I am working on. I have created a buffer around a compressor station of 3 miles and am planning to clip the lines that ...
4
votes
2answers
1k 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 ...
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0answers
13 views

How can I prevent markers from being clipped?

I have a series of point that I want to draw circles with varying radii around. The radii depend on the zoom level and represent a 1.1 mile circle from the point. I'm running into an issue where the ...
2
votes
1answer
186 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 ...
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0answers
30 views

Merge multiple buffers [duplicate]

Is there a possibility to merge multiple buffers into one single buffer? Illustration: I would like the green buffer to be of one single piece.
1
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1answer
747 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 ...
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37 views

Removing Routes Within a Buffer

To preface, I have stations on lines, which the stations have a 3 mile circular buffer. I am trying to isolate the lines that those stations reside on from the lines that do not have stations (i.e. ...
1
vote
1answer
338 views

SQL Data: 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 ...
1
vote
1answer
45 views

How to create a feature mask with a polygon? [closed]

I need to create the SAME polygon shape shown in the image below, just 2 miles larger. The buffer wizard tool is only creating circular buffers around the irregular shape below. Any ideas on how to ...
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0answers
43 views

How to go about buffering different values in a field separately?

I have a clip of urban areas where the names are all messy with hyphens, apostrophe's etc so have decided to use the number value for each name to populate a list. My aim is to do analysis on each ...
0
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1answer
24 views

How do I assign point value ranking system to multi-ring buffers?

I created a multi-ring buffer of different distances, and I want to assign a point ranking to each distance as part of my analysis. So for example: farms within the 0-25 mile buffer would get 4 ...
-1
votes
1answer
34 views

Counting points in concentric circle buffer zones of different sites in a map? [closed]

I produce concentric circles of 200 and 500 m buffer zones to see water points within each buffer zones. The buffer zones are created throughout my study area. How can I count the points found in ...
1
vote
3answers
32 views

Join attributes by location doesn’t appear to be including data that it should

I am trying to calculate the number of bus stops which are within 400m of c. 100 properties that are in relatively close proximity to one another. Using MMQIS I created the 400m buffer for the ...
0
votes
1answer
26 views

Which suitable buffer distance to choose for a kernel density analysis to deal with edge effects?

I would like to run a Kernel density analysis on point features in ArcGIS 10.2 for hotspot detection, and to do it is recommended to apply a buffer zone to the study area in order to reduce the edge ...
0
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0answers
38 views

Updating a polygon with an attribute from ALL intersecting polylines

I have a polyline layer with road information such as the road it beings from and the road it ends at. Some of these are digitised incorrectly and I am trying to pull out the road name (or unique ID ...
0
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0answers
16 views

Draw (adjacent) GIS-shapes, reduced and “rounded”

as the title says: I want to draw (C#, WinForms application) adjacent polygons stored in an GIS-database (SQL Server 2012, geography-datatype). The data source is OpenStreetMap administrative ...
2
votes
1answer
51 views

Why does Select by Location select points outside search radius?

I'm using Select by Location to find wind turbines within 5-km of a center point feature -- why does this command also select nearby turbines? The image below shows my selected points with a 5-km ...
1
vote
1answer
277 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 ...
4
votes
3answers
792 views

How to join number of point features into attribute of nearest line segment using ArcGIS Desktop?

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 ...
4
votes
2answers
360 views

How to extract values from intersection of different size buffers 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
32 views

Calculating area of residential area wihin multiple ring buffer in ArcMap?

I need to calculate the size of residential area within 0-250m, 250-500m and 500-750m of a bus stop. I have made a multiple ring buffer around the bus stops. And I have a shapefile of the residential ...
0
votes
1answer
56 views

How to get arcpy to access attributes of a geometry?

As a novice python programmer I am struggling mightily with my code. What it is supposed to do is Buffer a bunch of points with four distances (100, 200, 300, 400meters) Calculate zonal sum for ...
2
votes
1answer
102 views

Load buffer by percentage plugin python error

I couldn't install the buffer by percentage plugin on the QGIS 2.6 (I have Windows 8.1 on my pc), and gives a error message - the plugin is broken. Then when I start the QGIS it gives the following ...
1
vote
1answer
626 views

Converting distance between nautical miles and degrees using ArcObjects?

We have a certain functionality developed that: Will check for a tolerance value (this input is given by the user as NM); Buffer a polygon by that value (all polygons are in WGS-84); Iterate through ...
1
vote
2answers
57 views

Buffer View With SpatiaLite and QGIS

Creating a dynamic buffer with PostGIS the following view is working: CREATE VIEW buffer500m AS SELECT gid, st_buffer(geom,500)::geometry(polygon,31492) AS geom FROM point; Unfortunately this query ...
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0answers
33 views

How to create a real size buffer around a point in qgis

I have a postgis pointlayer in EPSG:3857, added to a project that is set up with OTF ON to project everything (other layers) to EPSG:3857. In postgis, I defined a view to dynamically create a buffer ...
2
votes
1answer
73 views

Create random points in ArcGIS on a polyline in a polygon

I am trying to create 100 random points, 1 within 500m of 100 points I already have. I have created a buffer and can easily create 1 random point in each, but now I want those points to lie on a ...
5
votes
1answer
334 views

Geodesic buffers for polygons in ArcObjects?

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?
8
votes
2answers
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
1answer
54 views

Buffering line in ArcMap is creating smaller buffer than expected?

When I buffer a point (red dot on image) by 3 miles, it is 3 miles on all sides. When I buffer a line (blue line on image) by 3 miles, it is more like 2.67 miles on the sides parallel to the line. I ...
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vote
1answer
94 views

How to create dissolved buffers in QGIS with PostgreSQL/PostGIS?

Creating a dynamic buffer in QGIS I use the following query: CREATE VIEW buffer40units AS SELECT gid, st_buffer(geom,40)::geometry(polygon, 31492) AS geom FROM point; Now I want to dissolve ...
2
votes
0answers
39 views

ST_Buffer with segment AND endcap parameters

Making a QGis plugin that buffers a line and I want to declare a high number of segments and a flat endcap. ST_Buffer(geom, 40, 25, 'endcap=flat') This doesn't work with both parameters entered, ...
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vote
1answer
78 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 ...
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0answers
45 views

Catchment area calculation

I have a conundrum. I am trying to shortlist optimal physical locations in my county for developing recycling centres that serve the population. I have a vector point layer of the centre point of ...
2
votes
2answers
56 views

Create buffer along shoreline near sample site

I want to look at the land use on the shoreline of a river relative to a specifc point on the river. I have created a point on the shoreline using the Near tool. Following this I am having trouble. I ...
0
votes
1answer
64 views

PyQGIS point buffer with OpenLayers base map

Using PyQGIS, I desperately need help on creating a buffer around a point in a node layer and then selecting features from a trails layer that fall within the buffer. When I load the shape files ...
1
vote
1answer
36 views

Point buffer problem

I have a point feature that I would like to buffer to select segments that are within 15 meters of the point. The code I have is working but it's influenced by the map scale. Zooming in or out changes ...
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0answers
43 views

Displaying symbology outside map canvas window extent?

Say we have equally distributed x,y mesh vector file. Each coordinate has a map-unit based diameter circle symbology. If we zoom into a region of the map canvas far enough, some centroids exist ...
0
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0answers
30 views

How to make SQL Server buffer only on one side?

Is there any way to make a buffer on a linestring only on the right or the left side? If not, is there any way to translate the linestring?
2
votes
2answers
694 views

How to perform a buffer analysis in PostGIS?

Need to Implement Spatial Analysis in Postgresql. Can Any one guide me to accomplish the spatial analysis eg) 2 km buffer for road network layer.
0
votes
1answer
162 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 ...
4
votes
1answer
88 views

Buffering Points Directionally

I have about 10,000 points that I want to apply a partial circular buffer to based on an angle, from -30 to 135°. A similar question for polygons seems to have been answered here, but I cannot make ...
5
votes
3answers
1k 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 ...
0
votes
1answer
50 views

Use turf.count with turf.buffer dynamically

I have this code where I'm trying to create a buffer dynamically from a draggable marker and then count how many points fall insed this buffer. As of now I can drag the buffer around without any ...