Questions tagged [buffer]
A region enclosing a point, line, or polygon at a specified distance.
220
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Understanding QGIS buffer tool units
I 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 layer needs to be reprojected and saved but it hasn't worked at ...
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24
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4
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Creating buffer in meters
Objective
Given a list of coordinates in longitude/latitude, stored as a .csv file, I want to create a buffer with distance of x km around those coordinates. (In case this is relevant, these ...
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8
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1
answer
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Buffering point with different distance toward N, E, S, W using ArcGIS for Desktop?
I want to create buffer polygon(with curved edges) from points like this using ArcGIS for Desktop.
distance toward North from a point 5, toward South 1.5, toward west 1, toward East 2.
all this ...
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6
votes
1
answer
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Buffer is too small (OSM Data, EPSG 3857)
I buffered some lines with 100 m in QGIS. When I measured it turns out instead of 100 m its 62. I understand the issue could relate to the CRS. I used EPSG 3857 because the OSM map in the background ...
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39
votes
6
answers
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Creating square buffer around point feature using ArcMap
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 ...
- 509
17
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4
answers
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Buffering 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 ...
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1
vote
2
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Zonal statistics 2 ends up causing a fatal error. Is there an alternative?
I have recently switched to using the "zonal statistics as table- 2" supplemental tool instead of the regular "zonal statistics" because I have overlapping polygons which zonal ...
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19
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4
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Creating 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 ...
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13
votes
3
answers
10k
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Aligning multiple points to line in QGIS?
I would like to align multiple points to a line, or lines within a layer, using a specified tolerance or buffer around the line objects. Please refer to the sample sketch attached.
For the sake of ...
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10
votes
2
answers
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Representing uneven tree canopy spread around point in QGIS
I am trying to make an attribute to show the uneven spread of the crown of a tree using the four cardinal points. I can use a buffer to show one feature, in this case a root protection area. But I ...
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37
votes
11
answers
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Performing reverse clip in ArcMap
Is there a way to perform a 'reverse' of the clip function in ArcMap?
I am not exactly sure how to explain this so here is a diagram:
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2
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Buffering in meters/km using WGS84 layers using QGIS
I am 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 using the ftools buffer tool.
I understand that the buffer ...
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15
votes
3
answers
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Achieving 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 ...
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11
votes
1
answer
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Creating square buffers around points using shapely? [duplicate]
I am trying to create square buffers around given points, I am able to create circular buffers but how do I create square ones?
from shapely.ops import transform
from shapely.geometry import Point
...
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votes
2
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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 ...
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