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

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3
votes
2answers
71 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
320 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
votes
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
41 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 ...
1
vote
0answers
32 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 ...
0
votes
0answers
28 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 ...
4
votes
1answer
306 views

Selecting points within 2 buffers?

I have 2 huge files of points (hundreds of thousands of points). I need to determine a way to loop through all the points in one file and find all the points in the second file that are only a ...
2
votes
2answers
338 views

Why does the buffer take up whole screen?

I am trying to create buffers around the Hurricane Sandy path I created in QGIS (points are lat/long). I have both points from each day she was tracted and the line I created from it with ...
1
vote
1answer
51 views

Why does Buffering in QGIS fail with this error: Argument 1 has unexpected type 'NoneType'?

I get this error on both 2.10 & 2.12 on two different machines running Ubuntu 14.04 with Python 2.7.6. When trying to run the fixed-distance buffer on a shapefile with polylines I get the ...
1
vote
1answer
69 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 ...
5
votes
1answer
2k views

Calculating forest cover within buffer that overlaps with other buffers?

I'm new to ArcGIS. I have a layer showing forest cover in a landscape. I'm trying to create a 5km buffer around every forest patch in the landscape and then calculate the amount of forest within ...
0
votes
1answer
168 views

How to add a buffer on a point in Open Layers 3

I am trying to add a buffer around some points shown on a map. I have tried to do something similar back in the days of OL2 and I remember it was not straight forward. Is there a simple way to do ...
1
vote
0answers
23 views

GeometryEngine Offset or GeodesicBuffer - to get minimal corners.net

We have a a polygon which might have between 8 and 20 points, which we need to draw a boundary around, that is at least 1km around at all points. The restriction is that we can't increase the the ...
2
votes
1answer
58 views

Grouping points using grouping analysis to look at raster characteristics within overlapping buffers?

I want to extract averages from raster data that fall within buffer zones around a village point. The problem is that the villages are pretty close together in some places and I need to come up with ...
4
votes
4answers
943 views

Creating polygons as % of original area using ArcGIS Desktop?

I have a polygon shapefile and need to create new polygons, within the originals, as % of original area. I used buffer by field (Field= new area as %) but the buffers are created in circles around ...
3
votes
2answers
74 views

Is there a way to have a 'live' buffer in QGIS

I use QGIS (2.10.1) to create buffers around polygons. I often create a series of buffers, and later need to edit the underlying polygons. It is frustrating to start from scratch in re-create ...
1
vote
2answers
39 views

How to Merge, Buffer, and then Intersect multiple features based off of the Buffer feature in ModelBuilder

I have created what I thought to be a simple ModelBuilder model and the final output (.shp format) is always an empty. As you will see in the ModelBuilder image below: Merged 3 track logs now called ...
5
votes
2answers
1k views

Compound variables in Model Builder?

I'm trying to create a model wherein one of the parameters is a compound variable, that is made of multiple variables joined together. How can this be done? For example: create an insider buffer ...
4
votes
1answer
88 views

Create uneven, different diameter ellipse around point in QGIS 2.10

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 ...
2
votes
1answer
19 views

Determining Wet Well Service Area using ArcGIS for Desktop?

I am using ArcMap 10.1 I have a wet well with a known ground elevation. I am trying to determine the service area of that area based on the assumptions that the wet well is 20 feet deep and that my ...
3
votes
2answers
2k views

Using Buffer Wizard in ModelBuilder?

I am creating a model in ArcMap 10 and I need to use the Buffer Wizard tool to create multiple buffers within a polygon feature class. The problem is, I can't seem to place the Buffer Wizard within my ...
7
votes
1answer
2k views

Inside buffer with attributes in ArcGIS?

How can I create buffers for polygons that: a) lie only inside the polygon boundary, and b) know who their parent is? An example of where this is useful is First Nation Traditional Territories. ...
2
votes
1answer
89 views

Understanding target layer and source layer in Select By Location of ArcGIS for Desktop?

I have a lab assignment that i would need some help with. I have a 25km buffer that's in a circle. Within that i am supposed to make a map were the berries that people can pick are. The assignment is ...
2
votes
3answers
86 views

Buffer zone outside objects cluster using FME

I am doing a buffer analysis around some roads. The buffer is 1000 meters and is dissolved. This gives me a buffer which covers the roads as well as the distance outwards. It looks like this: ...
0
votes
0answers
52 views

Finding distance and angle to points in point buffer, from center of buffer?

I have a number of buffer circles that contains some interesting points (the green points in the picture). I would like to find out the distance and angle from each buffer center (that I have in the ...
2
votes
1answer
103 views

Zonal Statistics Freezing QGIS 2.2

Running on Windows; 8gb memory, 500gb HD, i5 cpu; Raster file: 250mb I am having a problem with zonal statistics advancing past 17%. I am trying to run statistics on a crop grown in certain counties. ...
2
votes
1answer
30 views

Can you map distance bands?

I know you can calculate using distance bands, but can you actually illustrate them on the map in ArcGIS? I have a presentation next week, and it would be a useful illustration for me to use.
1
vote
1answer
26 views

arcpy.mapping exportPDF with ONLY one buffer ring turned on for associated iterated feature

I am exporting X number of maps iterating through a point feature class. Each feature class has a buffer drawn around them. I know how to export a PDF for each feature class at a fixed scale (if I ...
0
votes
0answers
68 views

Script Error when trying to run Buffer tool

I am trying to create a model and run the buffer tool in the model. When I try to set open "buffer" in the model to set parameters I get this: I am running Windows 7 on a Lenovo W541, ARCMap ...
2
votes
2answers
70 views

Is there a QGIS equivalent of inline variable substitution in ArcGIS?

I am working through some analysis in QGIS and need to iterate through a layer of points and buffer each point and then export to a new layer. I want the new layer names to have the values from a ...
1
vote
0answers
46 views

How to calculate zonal statistics of buffer zone with minimum distortion

I want to create 50km buffers around a large set of polylines that have a global extent. My objective is to calculate average raster values within each buffer zone. The matter of confusion: I want ...
1
vote
1answer
93 views

Select points within a buffer in QGIS

In my vector layer I want to select points within a buffer of 12 meters and with an exception (if 'Name' is not "James" than select). Is this possible with "select by expression"? Thank you!
0
votes
0answers
22 views

Change parameters of buffer in editor toolbar, not in the actual buffer tool

I have many areas that need to created as buffers around lines, but they need to be various sizes and an on-going project where the lines will need to be drawn in, adjusted, then buffered. The most ...
2
votes
1answer
213 views

Create Circle and Marker on Click in OpenLayers

I want to create a marker and buffer around it with a given radius on map click event. Marker is displayed successfully but the polygon doesn't display. I guess there is problem in projection setting. ...
4
votes
1answer
344 views

Distance from waterways using SDC file?

I have an sdc file with water bodies, i.e. oceans-rivers-lakes. I want to combine it with a shapefile with the boundaries of countries all over the world and produce two measures: 1) The average ...
1
vote
2answers
77 views

Changing units of buffer

Desktop 10.3.1 GCS: WGS 1984 Created a Buffer of points based on a pre-specified radius from the points attribute table. It appears all of the buffers were created with a decimal degree unit of ...
1
vote
1answer
674 views

Buffer analysis - use of surface area based on DEM

I have one problem and this is that I would like to create a buffer around point. This is simple with ArcMap using the buffer tool. But is it possible to create the buffer considering also the true ...
2
votes
1answer
247 views

buffer using topological operator

IMap map = axMapControl1.ActiveView.FocusMap; IFeatureSelection fSelection = map.get_Layer(0) as IFeatureSelection; ISelectionSet selSet = fSelection.SelectionSet; ...
2
votes
0answers
132 views

Can we create buffer analysis using python in qgis?

Can we create a buffer of distance 0.004 using python in qgis. I tried this link, but it isn't working for python in qgis 2.10.1-Pisa. The above is the diagram of buffer I am asking. It's located ...
2
votes
2answers
102 views

Erasing buffer within another buffer without erasing overlapping buffers using ArcGIS for Desktop?

I'm not an ArcGis pro, so I need help on this one, and I have tried searching for answers. I am using ArcMap 10.2.2. I don't know how to use python. I have 6km and 12km buffers around the sites ...
0
votes
0answers
111 views

Buffering a polyline

I'm attemping to buffer a polyline that the user has drawn on a map (Google maps and OSM map). The user specifies a distance in metres and a polygon should be drawn around the polyline representing ...
0
votes
0answers
50 views

Snapping points to polylines and maintaining minimum distances between the points as well as meeting other parameters

I have thousands of locations that I would like to snap to be placed on top of a hundreds of polylines based upon matching attribute fields. Think of them exit signs located on every ...
1
vote
1answer
133 views

How to extract information from a buffer in ArcMap

I have a buffer in ArcMap 10 extending from a polyline, with numerous 5 km intervals (multiple buffer tool). I also have many layers already in raster format in ArcMap, including slope angle, geology, ...
0
votes
1answer
79 views

How to extend a (river water level) raster, transfering its values to the added area?

Exploring the raster tools in QGIS and related software, I found raster buffer functions to surround existing rasters. The values of the raster buffer are restricted to be distances from the interior ...
1
vote
2answers
52 views

Select points located within Multi Ring Buffer

I have two point datasets, 1 showing the location of road accidents, the other showing the location of traffic intersections. I have created a Multi Ring Buffer at 25m intervals around the traffic ...
5
votes
5answers
2k views

Creating multiple buffers using QGIS?

I'm new to QGIS and have no programming skills. Is there an easy/uncomplicated way to create multiple buffers around a line feature?
3
votes
2answers
2k views

ERROR 000800 when trying to snap points layer to line or buffer layer

I am very new to GIS, so go easy on me. I am using ArcCatalog 10.0 and trying to snap a set of points to another layer that has roads in it. The points represent 10th miles along the road. Here are ...
0
votes
1answer
38 views

How to use an array for buffer

I want to to use an array to create 3 buffer files with different buffer distances. The code should produce 3 buffer files in one step. Additionally, the code below runs already after using an ArcGIS ...
1
vote
1answer
150 views

Create Centerlines of a Polygon Buffer Feature, ArcGIS 10.3

I have seen another method for this to create centerlines, but that involved splitting the line and deleting the line closures. This is a huge network and the time involved in that would be ...
7
votes
3answers
117 views

How to set a buffer only in a specific direction?

I am trying to create a buffer for several polygons in a south-western orientation. As far as I know, this is not possible using the buffer tool (I use ArcGIS 10.3). I could do it manually but for ...