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

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2answers
49 views

Displaying Buffer overlap in ArcGIS Pro with Intersect

I have created some buffers around some points in ArcGIS Pro, and I am wanting to recognize the area of the buffers that overlap with another buffer within the same layer with a different color. How ...
0
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1answer
24 views

Merging buffers together with no fill colour? [closed]

I am a bit of a novice with GIS. I have created several 500m buffer zones around streets in GIS. I ultimately want a combined buffer so only the outside line that measures 500m away from all of these ...
0
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1answer
35 views

Adding pixel value data from a raster layer to a number of buffer polygons ArcGIS

I have created a layer of polygons with buffers around my points of interest, all of the same size, in Arc GIS. I also have a raster layer of nighttime lights with pixel values between 0 and 63 ...
2
votes
2answers
46 views

How do I create proportionate inner buffers which reduce in size based on a percentage, to a specific point

I am working in ArcGIS and I have a 75 basin polygons and a point feature (called origin point) within each polygon. (Not necessarily in the centre of the polygons). I want to create 100 polygons ...
1
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0answers
13 views

Creating Dynamic 3D Buffers in ArcGIS Pro

I am currently using ArcGIS Pro to model WiFi router signal distribution and I would like to use buffers to display them in a 3D format. I have used the Buffers 3D tool to create spherical buffers, ...
1
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1answer
25 views

Variable width buffers depending on surface area (Arcmap 10.1)

I know this is a pretty basic question but I couldn't find the answer myself, so here I go: I need variable buffer widths depending on the surface area of the polygon (city) size. For example: A ...
2
votes
0answers
27 views

Buffers Not Overlapping correctly in ArcGIS for Desktop?

I have two records in one shapefile that I am trying to create two separate buffers around. When I go to Geoprocessing - Buffer I choose the desired shapefile, set the desired buffer distance, make ...
0
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0answers
20 views

Problem with passing ranks to different buffers

This issue is really troublesome.i have a SpatialPointsDataFrame which refers to a city.I needed to perform a join with a dbf in order to attach the population column which i did thanks to a couple of ...
1
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0answers
21 views

Parcel Buffer - Property Setbacks [closed]

I am trying to model property line setbacks. In this case: 25 ft from front and back of property, 10 ft from one side and 8 ft from the other. Tried averaging the total set back distance 68/4 = 17 ft ...
2
votes
0answers
50 views

Drawing “proportional” buffer using QGIS or GRASS?

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 ...
5
votes
1answer
121 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 ...
0
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0answers
17 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 ...
0
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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 ...
0
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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.
0
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0answers
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
50 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 ...
0
votes
1answer
30 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
38 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 ...
0
votes
0answers
48 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 ...
1
vote
3answers
37 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
31 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
votes
0answers
39 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
17 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
54 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
35 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
67 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 ...
1
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0answers
35 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
86 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 ...
1
vote
1answer
56 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 ...
1
vote
1answer
112 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
43 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, ...
1
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0answers
48 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
60 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 ...
1
vote
1answer
37 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 ...
0
votes
0answers
32 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?
1
vote
0answers
44 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 ...
1
vote
2answers
64 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 ...
4
votes
1answer
91 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 ...
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 ...
0
votes
1answer
24 views

How to set a label's buffer color in a mapfile?

I would like to set a white buffer around labels in a mapfile (Mapserver version 6.2.1). In the official documentation, I can't find a specific parameter for this... I have tried the SHADOWCOLOR and ...
0
votes
0answers
56 views

For every point create a wedge

How does one create a wedge polygon from a point? If I have 2000 points, I want each to have a wedge starting at each point with each point having a defined azimuth that the wedge points toward. That ...
0
votes
1answer
71 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 ...
2
votes
1answer
48 views

Multiple Ring Buffer in ArcPy Generates Single Ring

I'm running a simple multiple ring buffer using ArcPy. My goal is to generate a multi ring buffer for each pond in my dataset of 50,000. Here's the line of code: ...
3
votes
1answer
47 views

Extending buffer zone

I am working in ArcMap 10.2 (and Modelbuilder) and I would like to solve the following problem: I have Buffer A (single part) and Buffer B (multipart). I would like to extend Buffer A with Buffer B ...
1
vote
1answer
89 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 ...
3
votes
1answer
86 views

Python code for decreasing polygon size based on percentage?

I would like to decrease the size of polygons by percentage and not by distance in order to implement this into ModelBuilder to loop over a number of polygons. To my knowledge this tool is available ...
1
vote
1answer
54 views

Iterating through a point layer to create & sum distance rasters

I'm writing an Arcpy program to process data in a layer of several hundred points ('ptsLyr', from file 'ptsFile'), each of which has its own ID ('RecordID') and an associated value, 'radius', that I ...
2
votes
2answers
37 views

Assigning values of points outside a buffer to points within a buffer

I have 10m buffers around line features and a point shapefile which has some points intersecting the buffer. I would like to take each point that falls within the buffer and assign it the value of the ...
1
vote
1answer
42 views

Euclidean distance outside a Polygon (ArcMap)

I got some university coursework to analyse the best potential areas for a residential development project and I'm currently doing multi-criteria evaluation. One of the shapefiles in the dataset given ...
1
vote
1answer
77 views

Multi-Ring Buffer Methodology

When creating a multi-ring buffer I see two methodologies: Create buffer around feature, buffer the resulting buffer, and repeat for as many rings as required. Using the initial feature to create ...