Questions tagged [buffer]

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

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4
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1answer
37 views

Buffering selected objects in the map in Graphical modeler

Process: Buffer selected point to 3000m then unselect that point and grab all records from a particular layer that intersect with the buffer. I can't find a way of specifying that the buffer must use ...
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1answer
25 views

Finding the percentage of change of 30 meter resolution raster within buffer area

How could I find the percentage of change for each buffer area in the image below using ArcGIS Pro 2.5.0? I want to be able to show the percentage of change for each INDIVIDUAL and "unique" ...
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1answer
88 views

Creating buffers that automatically update when new feature added using QGIS

I have currently added a CSV file of earthquakes on a 7 day basis and added in the URL so that it gets updated automatically. I also have population count data for the whole of Central and South ...
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25 views

Calculating total area of three partially overlapping polygons (without counting area of overlap more than once) using ArcMap

I want to calculate the area of three 1 km buffers without counting the area of overlap more than once. I have used the merge tool to combined the three polygons and then I have used the dissolve tool....
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1answer
66 views

Buffer coastlines

I'm trying to generate a coastline buffer by using st_buffer() with data from the rnaturalearth library. However, when I create the buffer, it extends outside the realm of the projection, rather than ...
2
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1answer
54 views

Buffering a polygon keeping the same angle/shape using GeoPandas

I have an 'area.shp' (a polygon) file that I would like to buffer with a distance of 1000m. The polygon needs to be read from a folder, and the output needs to be saved with a new name at the same ...
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0answers
74 views

How to create mutually clipping polygons

Is it possible to create buffers (in my case, but polygons in general also) that would create a boundary at their point of contact ? (so that they don't overlap on each other). Like this (from left to ...
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1answer
28 views

R lidR - Creating a buffer around points of points belonging to an object

I would like to create a 3D buffer around powerlines inside a LAS file that contains forest and power lines in lidR (R package). If I would manually delineate the line features and export to an ...
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24 views

Making ring buffers (donuts) in Google Earth Engine

I am trying to generate multiple buffers around a layer that represents cities (FeatureCollection). Use the following code to create the buffers: // Function to create buffers of different sizes in ...
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15 views

Optimize distribution of buffers

I'm currently moving from using QGIS more as a visual tool to an analytical one. I am hoping to get better at optimal location distribution. I have a dataset of census population data visualized as a ...
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2answers
71 views

FME: Coordinates with a buffer - how to merge / dissolve points that overlap other buffers?

I'm trying to process some spatial query in FME. I have a dataset of cities with coordinate pairs and around these coordinates a buffer of 2 km. This results in multiple overlaps. I'd like to dissolve ...
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0answers
49 views

Directional buffer zone in QGIS [closed]

From the city point I want to create multiple buffer zone for 8 directions. For example I am attaching an image. What is the procedure to do that in QGIS or any suitable method like Google Earth ...
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1answer
32 views

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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2answers
76 views

PostGIS: Single side ST_Buffer of linestring produces strange output

In the example below I have a linestring PostGIS table (in black and yellow) and a single sided ST_Buffer output polygon (in red). The buffer distance is based on an attribute value stored in the ...
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31 views

Creating an intersection (mix of offset and buffer) of 5m on each polygon feature in QGIS [duplicate]

I'm trying to reproduce the steps needed to aim this goal: Given a layer of polygons, I'm want to retrieve for each polygon which is at a distance less than 50m to a 2nd polygonal layer the only 5m ...
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0answers
32 views

Specific mixed feature between offset, buffer and intersection

I'm trying to reproduce the steps needed to aim this goal: Given a layer of polygons, I'm want to retrieve for each polygon which is at a distance less than 50m to a 2nd polygonal layer the only 5m ...
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36 views

Buffer around suburb lines

I am using QGIS 3.6.3 and I am an amateur QGIS user. My QGIS project currently has a map outlining suburb boundaries in New South Wales, Australia. I am wondering if I can create a buffer around ...
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1answer
38 views

QGIS buffer of lines results in “random” vertex order in buffer polygon

I tried this topic already on QGIS dev mailing list: I have a fairly complex geometry-(and mind-)bending workflow where I'd ideally depend on the fact that buffering a line (regular buffer, flat cap, ...
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1answer
40 views

Earth Engine: One sided buffer

How can one obtain one-sided buffer (left/right) of a line geometry in GEE? I haven't found any specific function to do that.
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0answers
21 views

Determining a buffer distance multiplying the area of any polygon by a factor of X

I'm analyzing the surrounding of many polygons that can be of virtually any shapes (although they are most likely shaped like some sort of building footprints (like one or many overlaying rectangles). ...
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1answer
35 views

Decimal degrees buffer displayed incorrectly?

I would like to create a circular buffer with a radius of 2 decimal degrees around various points. However, after using the buffer tool under geoprocessing, I noticed that the buffers were perfectly ...
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0answers
15 views

Drawing polygon constant km around point in lat/lon coordinates in QGIS3.12

I have a set of points in lat/lon coordinates over Europe representing pixels from a satellite dataset. I know each pixel has size 10x10km. I want to draw a square polygon around each single pixel ...
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0answers
17 views

How can I identify points that share similar attribute with polygon features based on the attribute & distance between the two?

For Example; if both the point & polygon features have an ID field, I need to flag the points if they share the same ID as a neighboring polygon & are w/in 2000ft of each other. I have tried ...
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0answers
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How to calculate the exact area of three 1 km buffers that have been intersected?

I am trying to figure out the exact area of overlap of the 1 km buffers around three survey posts. I have used the Intersect tool to produce three individual intercepts which cover all the overlap of ...
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0answers
18 views

Does raster to polygon conversion impact area calculation using calculate geometry?

I am a beginner GIS user. I am trying to calculate the area of clipped buffers which I have intersected using the intersect tool by a habitat raster which I am working with. The edge of the ...
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0answers
35 views

Buffer around shoreline hitting user memory limits

I am having issues hitting user memory limits creating a buffer around a shoreline. I think its because there are too many elements in the feature collection. This might be a tiling issue? How do I ...
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1answer
38 views

How to calculate the area of overlap of a buffer in ArcMap

I am a beginner with GIS. I have used the buffer tool in ArcMap to draw a 1 km buffer around a set of three survey posts. I want to calculate the area of where the buffer's overlap. Is there a tool in ...
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1answer
94 views

Clip polygon with nothing more than a point as starting point

Quite a straightforward question: I have a point layer that consists of a few thousand points. These points are heterogeneously positioned in or very close to polygons that are water bodies. These ...
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3answers
316 views

Variable width buffer in QGIS

Is there any built-in tool in QGIS that I can use to buffer points to a variable size (I want to circles around the points, with widths dependent on an attribute in the point layer)? The Vector/...
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2answers
78 views

QGIS: Making circles of specific diameter from attribute in point layer

I have seen a similar question at Creating different diameter circles round points using QGIS but it is very old am seeking up-to-date and possibly more conclusive guidance. I would like to create a ...
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0answers
43 views

Distance buffer from point, with obstacles

In QGIS is there a tool or technique that would draw a fixed distance buffer from a point, taking into account obstacles in the buffer field? I want to illustrate the maximum distance a ship can ...
4
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1answer
121 views

How buffering works in GeoPandas?

I try to add a buffer on a set of lines via the buffer attribute of geopandas. But by testing on a simple case (see code below) I realize that the size of the buffer is not kept according to the ...
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0answers
26 views

Calculate area within a buffer zone

I am working on 3.12.0-București. I have created buffers (radius=300 meters) on a set of sampling points. I do not remember the number of segments that I have used. However, I have set a high number ...
2
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1answer
43 views

QGIS 3.10.7 Buffering a line by 1m with flat end cap, produces “cracked” buffer

I need to buffer a line 1 meter, however when running the buffer tool in QGIS with the end cap style as "flat" I get the result shown below. What causes this, and how can I fix it?
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1answer
30 views

Calculating the area of the polygon segments within multiple overlapping buffers

Let me try to explain my problem: I have a layer of polygons A layer of overlapping buffers I want to calculate the area per buffer of the containing polygons. The problem is that the buffers are ...
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1answer
27 views

Keep / append attributes to buffered PolyLines in QGIS

I have a shapefile containing multiple line files with key attributes. I buffered each using cap_style=3 to get the correct buffer, but all of the attributes are lost. I'm either looking for added on ...
1
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1answer
105 views

Why using buffers in land use / land cover classification task?

I am following the tutorial How To: Land-Use-Land-Cover Prediction for Slovenia and I would like to understand why they used a positive buffer (expanding boundary limits) in the first part of the ...
0
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1answer
49 views

Selecting polygons based on area of overlap in QGIS?

I am working with point data in QGIS, where the points represent electricity pylons on a transmission grid. I have created buffers with a 1 km radius around each of the points, and I would like to ...
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1answer
33 views

Using MMQGIS to create internal buffers

I am new to QGIS. I need to create both interior and exterior buffers around a country border, however MMQGIS does not allow me to create a buffer that is, for example, -10 km from the border. Now I'm ...
0
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1answer
30 views

Calculating fragmentation parameters at high resolution

I'm trying to evaluate fragmentation of an ecosystem. While It is easy to calculate in ArcGIS 10.1 values such as Area, perimeter or minimum distance between fragments, I'm having problems calculating ...
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2answers
45 views

Buffer and Dissolve/Union 2 million points

I'm looking for a solution that will let me add a 100m buffer around 2 million points and then dissolve/union that output into a single multipart polygon. On a much smaller scale (100 points) using R ...
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0answers
18 views

Buffering multiple features according to an attribute field?

I'm trying to build a buffer tool with Python that will function according to the attribute field that contains varying widths. I am building a inventory of streets and need to add a buffer to the ...
0
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1answer
29 views

ArcGIS - Identify which buffers intersect each other

I have a dataset with buildings. I want to calculate which buildings are within 25 meter distance of each other. Therefore, I calculated for each building a 25 meter buffer around the building. Then ...
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0answers
57 views

r raster:: extract band (integer) values from raster buffer without taking the mean

I want to extract values from my RGB raster, which are in the buffer(zones) of my 14 station points data. So far the values are extracted with the raster::extract by taking the mean of some values ...
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0answers
203 views

Parallel Offset of a Polygon Edge with Shapely

I need to offset edges of a polygon by different amounts. buffer() will parallel-offset all the edges by the same amount, and each in its edge-normal direction (and in both directions if applied to a ...
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1answer
45 views

How do I get R to recognize a buffer around a las file?

I'm trying to clip from a catalog using a shapefile. The file is huge, so I've divided it into two (ctgw1 and ctgw2). The final radius should be 47 (the ctg is in feet) and I'm trying to set a buffer ...
4
votes
1answer
83 views

Count number of points outside of Buffer?

I'm trying to count the total points outside of a buffer zone using PostgreSQL. The intention is to find all of the schools that do not fall within a 2 mile radius to libraries. I've either gotten ...
4
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0answers
29 views

How to add raster value with specific equation?

I am trying to develop a raster layer with the interference of streetlight in this example: As you can see there are multiple buffer rings around a point layer. I actually want to transform this ...
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1answer
94 views

How to change layer’s CRS in order to buffer and intersect in QGIS?

I'm very new to QGIS (working with version 3.12). I'm trying to create a buffer of rail lines, but it's coming out much larger than it should be, e.g. when I try to show a 500-ft buffer, it results in ...
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1answer
31 views

ArcGIS buffer wizard tool giving No map units defined

When I click on buffer wizard tool in ArcGIS software, I get an error: No map units defined! How can I fix it?

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