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Buffer

GIS  Bubble  Buffer Zone
04/23/2014

Buffer
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.


Buffer
Buffer - 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 ] ...

[edit] Buffering
Main article: GIS
Objects in space have their own impact contributed to their surrounding space.

Buffer objects by 500 meters
SELECT ST_Buffer_Meters(the_geom, 500) FROM sometable;
Buffer 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 buffer 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.
Steps: ...

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.

Buffer
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.

Buffering: The process of creating areas of calculated distance from a feature
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paradigm IT offers backoffice services in civil/structural engineering and geographical engineering and information systems.

buffer A zone of a specified distance around coverage features. Buffers can be constant or variable distances based on feature attributes.
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Buffer
A zone of a specified distance around a selected feature.
Buttons ...

Buffering
Buffering creates polygons which are buffered a specified distance from input points, lines, or polygons.

Buffer: Area within a specified distance (radius) around a selected map feature(s).

Buffers
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.

Buffer
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).

buffer
A portion of computer memory set aside for quick temporary storage. A buffer is commonly used to store data on its way to or from a hardware device such as a disk drive.

Buffer Operation
Using these operations, the characteristics of an area surrounding in a specified location are evaluated.

The Create Buffers dialog box appears.
Make sure that you select the same choices as in the above image. For the category "What do you want to buffer?" 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.

Buffer zone query
Locate assets or customers within specified distance
Identify addresses
Review selected features
Configuration and Administration Tools ...

buffers around objects and features are very useful GIS capabilities
e.g. build a logging buffer 500 m wide around all lakes and watercourses
buffer 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.
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Buffer
In GIS, a polygon generated around an existing geographic object that is often used for proximity analysis.
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Create a buffer or buffers around your schools layer
Join information about school walking distance with your sites table ...

Figure 7.9 Buffer operations
The following figure 7.10 shows walking distance from ICIMOD building.
Figure 7.10 Walking distances from ICIMOD ...

Using the buffer function in the GIS, a half-mile zone was drawn around the water company service area. [LINK] This buffer 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.

buffer 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.

^ Mozilla Corporation, Buffer overflow in crypto.signText()
^ Paul Festa, CNet, Buffer-overflow bug in IE
^ SecurityTracker.

Often "…between two points" must be expanded to "…among set of points" to account for proximity, such as buffers around streams.

Buffer A zone of user-specified distance around a point, line or area. The generation of buffers 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 ...

- Perform detailed geographic searches with buffering and area selection tools. - Integrate geographic criteria into database queries (contains, intersects, within, etc.).

Point features may be sufficient for small communities, in which case a circular buffer is generated to create an area for the feature.

The solid contours are graduated buffers around the on-ramps at intervals of 1,467 feet in this picture. (Your intervals will be different unless you chanced to use exactly the same analysis extent.

A common type of proximity analysis is the buffer zone. Coverage can be quit complicated involving many layers and mathmaticaly complex such as the decreasing sound levels due to the inverse proportion law of noise generated by various types of air ...

[data conversion] A method of data conversion in which data is encoded as a sequence, stored in a file, memory buffer, or other medium, and transmitted across a network connection.

Buffering is the creation of a polygon around some existing entity or group of entities. The creation of a polygon that represents the area within ten kilometers of a hazardous materials transportation route is an example.

To answer such questions, GIS technology uses a process called buffering to determine the proximity relationship between features.
Overlay Analysis: ...

i) When concerned with shape of features, spatial accuracy of features within an area (including direction or distance), or with analyses involving geometric constructs (e.g. buffers defined around points, lines or areas; ...

The atmosphere acts as a buffer between Earth and the Sun. The layers, troposphere, stratosphere, mesosphere, thermosphere, and the exosphere, vary around the globe and in response to seasonal changes.

There are three categories of spatial modeling functions that can be applied to geographic features within a GIS: (1) geometric models, such as calculating the Euclidean distance between features, generating buffers, calculating areas and perimeters, ...

See also: See also: Feature, Information, GIS, Map, Analysis

GIS  Bubble  Buffer Zone
04/23/2014

 
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