algorithm
[computing] A mathematical procedure used to solve problems with a series of steps. Algorithms are usually encoded as a sequence of computer commands.
Algorithms and procedures for 3D Delaunay triangulation
Voronoi diagrams ...
Real-time software receivers: challenges and current status of algorithms of code and carrier generation and baseband processing, including single-instruction multiple-data operations and bit-wise processing ...
Algorithm is a procedure used to solve a mathematical or computational problem or to address a data processing issue. In the latter sense, an algorithm is a set of step-by-step commands or instructions designed to reach a particular goal.
Algorithm: A procedure or set of instructions used to solve a mathematical or computational problem or to address a data processing issue.
Algorithm - A set of instructions; ordered mathematical steps for solving a problem like the instructions in a computer program.
Algorithm
A series of instructions or procedural steps leading to the solution of a particular problem.
Alphanumeric ...
[edit] Algorithms
In recent years considerable effort has been put into improving algorithm performance (Z. Huang, 1998). Among the most popular are CLARANS (Ng and Han,1994), DBSCAN (Ester et al., 1996) and BIRCH (Zhang et al., 1996).
[edit] Algorithm to derive candidate keys from functional dependencies ...
Genetic Algorithm Plays a Role in Municipal Water Systems. Zheng Wu, Ph.D, advisory software engineer for Bentley. As featured in the SIGEVOlution newsletter, the ACM special interest Group on Genetic and Evolutionary Computation.
Algorithms for photogrammetry typically express the problem as that of minimizing the sum of the squares of a set of errors. The minimization is itself often performed using the Levenberg-Marquardt algorithm (also known as bundle adjustment).
Algorithmic information theory
Computability theory
Cryptography
Formal semantics
Theory of computation (or theoretical computer science) ...
algorithms to determine the flow direction generally use one of the following cases: 1. assume only 4 possible directions of flow (up, down, left, right - the Rook's move directions from chess); or 2.
The algorithm has previously been implemented by Franklin using MATLAB on data sets of the order of 257 by 257 nodes using sparse matrix techniques.
The algorithm for determining visual connectivity uses a series of expanding rings to determine relative elevation differences from the viewer position to all other map locations.
The algorithm used to determine slope and aspect uses a 3x3 neighborhood around each cell in the elevation file. Thus, it is not possible to determine slope and aspect for the cells adjacent to the edges in the elevation map layer.
The layout algorithms of ArcGIS Schematics allow the representation of any type of network or diagram including outside and inside plant diagrams.
Models and algorithms for earth observation
Organized tutorial covering physics, file formats, data correction, visualization, and a little GIS (discussing raster versus vector formats)
The Geographer's Craft Project ...
All data and algorithms are geographically explicit. The user inputs data on a station-by-station basis with the textual network edito r; ...
9. New improved algorithm to create closed polygons from line segments automatically.
R2V Selected by Thailand Ministry of Transport and Communication ...
There are several algorithms for calculating the Principal Components. Given the same starting data they will produce the same results with the one exception (are you surprised?).
A high-level algorithmic language for generating end-user applications. Features include the ability to create on-screen menus, use and assign variables, control statement execution, and get and use map or page unit coordinates.
alg - ER Mapper algorithm
aml - ARC/Info AML file
apr - ArcView Project File (ODB format)
avl - legend template file (ODB format)
avp - palette file (ODB format)
ave - Avenue script
avx - ArcView extension file (ODB format) ...
GIS Self Learning Tool - University of Melbourne - This is a general introduction to GIS, its algorithms and applications. It is not software specific. Shockwave is required for the interactive components. The developers would appreciate feedback.
200 algorithms to traverse a tree that explore the structure by enumerating each level totally before moving to a finer level; as opposed to enumerating each path from the root to the 'leaves' (depth-first). buffer p.
In unsupervised training, a clustering algorithm is used to partition a sample of the data into populations of pixels with similar reflectance, ...
There are strategies, algorithms, rules of thumb related to this question however for theoretically consistent answer we have to wait for a while.
In fact, the more layers and nodes are included in the network the flexible it is in training.
For this reason, combinatorial structures known as topological complexes are constructed to convert computational geometry algorithms into combinatorial algorithms.
the azimuthal orthographic projection, purely geometric, can be understood by anyone; basic trigonometry is involved only for algorithm derivation
the Braun stereographic cylindrical, an arbitrary geometric projection ...
The premise for this concept follows that since digital data can be assigned a value, mathematical algorithms can manipulate it. For example, (Map #1 + Map #2) / (Map #3 * Map #4). This is one of the basic foundations of an analytical GIS.
Optimization planning: Instead of simulating past behavior as previous systems do, FPA uses an optimization algorithm to find the most effective allocation of resources for a particular FPU.
- GIS algorithm inaccuracies, and
- human bias.
While error will always exist in any scientific process, the aim within GIS processing should be to identify existing error in data sources and minimize the amount of error added during processing.
The GIF graphic file format is always compressed using the LZW (Lempel-Ziv-Welch) algorithm, and it is not free. A licensing fee is required for each software program that implements the LZW algorithm.
Most grid operations perform their algorithm on every cell in the dataset.
The original name of the committee that designed the standard image compression algorithm. JPEG is designed for compressing either full colour or grey-scale digital images of 'natural', real-world scenes.
accented the conceptual elements mentioned above, along with activities such as "obtaining theoretical knowledge to form the design of a model," "developing theory on entities such as time and spatial phenomena," and "developing algorithms to test a ...
Cryptography makes use of algorithms to transform data which then cannot be retrieved unless one has access to the cryptographic key.
The TIN interpolator chooses which vertices to connect as faces using a method known as Delaunay Traingulation Though the descrioption of the algorithm is complicated, ...
Morgenstern, C. and Shapiro, H. "Heuristics for Rapidly 4-Coloring Large Planar Graphs." Algorithmica 6, 869-891, 1991.
Ore, Ø. The Four-Color Problem. New York: Academic Press, 1967.
Kriging - A mathematical interpolation method based on the use of a generalized least-squares algorithm. It was first developed for mining applications but is now commonly used for 3-D geographic data processing.
L ...
com ($54.95) -- this is one of the major textbooks on GPS technology, not for the algorithmically weak IRN-200B-PR-001 1995 GPS Interface Control Document ICD-GPS-200 - NAVSTAR GPS Space Segment and Navigation User Interfaces Reprint, ...
ERROR PROPAGATION
The compounding of errors in computational results during data analysis. Such error propagation is brought about by errors in the data, by poorly designed algorithms, or by low numeric precision.
measuring the time interval between the transmission and the reception of a satellite signal, the GPS receiver calculates the distance between the user and each satellite. Using the distance measurements of at least three satellites in an algorithm ...
To create a compressed archive(a "zip file") from one or more files using PKware's PKzip or a compatible archiver. Its use is spreading from MS-DOS now that portable implementations of the algorithm have been written.
USGS ...
Alternatively, baseline connections to NAD-27 project control may be reduced and adjusted directly on that datum with resultant coordinates on the NAD 27. Geocentric coordinates on NAD-27 datum may be computed using transformation algorithms.
Automatic raster to vector conversion: With the advancements of the technology, special softwares using intelligent algorithms have been developed to recognize the patterns of the points, ...
The values can be derived from map contours, by profiling a stereo model using a photogrammetric instrument or by processing digital stereoscopic scenes with image correlation algorithms. Other sources are satellite and aircraft altimetric sensors.
 See also: Information, Analysis, Model, GIS, Software
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