A zone of a specified distance around coverage features. Both constant-and variable-width buffers can be generated for a set of coverage features based on each feature`s attribute values.
- A temporary-storage device used to compensate for a difference in data rate and data flow between two devices (typically a computer and a printer); also called a spooler. [Category=Database Marketing ] ...
Main article: GIS
Objects in space have their own impact contributed to their surrounding space.
objects by 500 meters
SELECT ST__Meters(the_geom, 500) FROM sometable;
objects using a column of meter values ...
v.buffer input=pointsmap output=circles type=point buffer=1000
Note that attributes are not transferred (due to potential buffer overlap which cannot be resolved automatically).
Non-overlapping circles around input points with attribute transfer ...
The distance is given in map units by default. You can also give the value in other units by specifying a distance units abbreviation with the value that you enter.
Vegetated riparian buffer strips (RBS) represent a promising approach to impeding the delivery of non-point source (NPS) pollutants into streams, thereby protecting or enhancing water quality.
s are common vector analysis tools used to address questions of proximity in a GIS and can be used on points, lines, or polygons (Figure 7.1 "s around Red Point, Line, and Polygon Features").
A zone of a specified distance around features in a geographic layer. Buffers can be set at constant or variable distance based on feature attributes. The resulting buffer zones form polygonal coverages.
A zone of a specified distance around a selected feature.
Buffering creates polygons which are buffered a specified distance from input points, lines, or polygons.
: Area within a specified distance (radius) around a selected map feature(s).
It is possible to analyse how close objects are to one another using a buffer. A buffer is a shape based on any other existing object (point, line or area) that can be generated by the GIS.
ing creates physical zones around features. These 's' are usually based on specific straight-line distances from selected features (like in Figure 5.15).
1. An area of temporary data storage.
2. Compilation of distance zones from a selected coverage feature (which may be a point, line, or polygon).
The Create s dialog box appears.
Make sure that you select the same choices as in the above image. For the category "What do you want to ?" select "The features of a theme".
Buffer A polygon enclosing a point, line, or polygon at a specified distance. Use the Buffer or Select by AOI tools for this function.
Coordinates X and Y values which define a location in a coordinate system.
an area around an object, where every point within this area is smaller or equal to the distance
within a specific distance ...
Buffer zone query
Locate assets or customers within specified distance
Review selected features
Configuration and Administration Tools ...
s around objects and features are very useful GIS capabilities
e.g. build a logging 500 m wide around all lakes and watercourses
operations can be visualized as spreading the object spatially by a given distance ...
Buffering - The process of generating a buffer zone from a point, line or area feature by offsetting a user-defined distance from these features.
In GIS, a polygon generated around an existing geographic object that is often used for proximity analysis.
BufferWithTolerance() (this is similar to PostGIS variant of Buffer that takes 3 args (defaulted to 8 number of segs to use to approximate a quarter circle), MakeValid(), Reduce() - similar to PostGIS ST_Simplify(), STBoundary(), STBuffer(), ...
Create a or s around your schools layer
Join information about school walking distance with your sites table ...
You can adjust the buffer in Windows Media Player. This will result in a longer initial download, but will help to provide a smoother presentation stream. To adjust the buffer: ...
Using the function in the GIS, a half-mile zone was drawn around the water company service area. [LINK] This zone was the "window" used to view and combine the various map coverages relevant to the well site selection.
Dissolve Barriers - An option in the buffer wizard to treat a soon to be created buffer as either one object or several
Feature - A digital representation of something in the real world.
p. 142 a zone constructed outwards from an isolated object to a specific distance. C
CAD p. 31 computer-aided design, software packages designed to automate drafting of mechanical drawings. cadastral p.
It includes such GIS functions as topological overlay, buffer generation, and spatial or network modeling. Abbreviated SA.
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Often "…between two points" must be expanded to "…among set of points" to account for proximity, such as buffers around streams.
A zone of user-specified distance around a point, line or area. The generation of s to establish the proximity of features is one of the most common forms of GIS analysis.
Get the coordinates for the quad box and add a 100-meter buffer
Use the coordinates with the generate command to generate a polygon coverage
Calculate which quads will be needed ...
See also: Feature, Information, Map, GIS, Analysis