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Well-known Text Representation Of Geometry
Well-known text (WKT) is a text markup language for representing vector geometry objects. A binary equivalent, known as well-known binary (WKB), is used to transfer and store the same information in a more compact form convenient for computer processing but that is not human-readable. The formats were originally defined by the Open Geospatial Consortium (OGC) and described in their Simple Feature Access. The current standard definition is in the ISO/IEC 13249-3:2016 standard. Geometric objects WKT can represent the following distinct geometric objects: *Point, MultiPoint * LineString, MultiLineString *Polygon, MultiPolygon, Triangle * PolyhedralSurface *TIN (Triangulated irregular network) *GeometryCollection Coordinates for geometries may be 2D (''x'', ''y''), 3D (''x'', ''y'', ''z''), 4D (''x'', ''y'', ''z'', ''m'') with an ''m'' value that is part of a linear referencing system or 2D with an ''m'' value (''x'', ''y'', ''m''). Three-dimensional geometries are designated by a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Markup Language
Markup language refers to a text-encoding system consisting of a set of symbols inserted in a text document to control its structure, formatting, or the relationship between its parts. Markup is often used to control the display of the document or to enrich its content to facilitating automated processing. A markup language is a set of rules governing what markup information may be included in a document and how it is combined with the content of the document in a way to facilitate use by humans and computer programs. The idea and terminology evolved from the "marking up" of paper manuscripts (i.e., the revision instructions by editors), which is traditionally written with a red pen or blue pencil on authors' manuscripts. Older markup languages, which typically focus on typography and presentation, include troff, TeX, and LaTeX. Scribe and most modern markup languages, for example XML, identify document components (for example headings, paragraphs, and tables), with the e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SFA LineString
SFA may refer to: In science and technology In medicine * Superficial femoral artery, a large artery in the thigh In chemistry * Saturated fatty acid, a type of fatty acid with no double bonds * Segmented flow analysis, a technique and class of instrument used in chemical analysis * Sodium fluoroacetate, an organofluorine chemical compound, and the sodium salt of fluoroacetic acid In physical science and engineering * Substance flow analysis, a method of analyzing the flows of a material in a well-defined system * Surface forces apparatus, a scientific instrument and technique * Svenska Flygmotor Aktiebolaget late 1940s Swedish aero-engine manufacturer Other uses in science and technology * Sales force automation, information systems used in customer relationship marketing * Simple feature access, a standard storage and access model for geographical data * Single Frequency Approach, an aviation procedure * Stochastic Frontier Analysis, a method of economic modeling * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Double-precision Floating-point Format
Double-precision floating-point format (sometimes called FP64 or float64) is a floating-point number format, usually occupying 64 bits in computer memory; it represents a wide dynamic range of numeric values by using a floating radix point. Floating point is used to represent fractional values, or when a wider range is needed than is provided by fixed point (of the same bit width), even if at the cost of precision. Double precision may be chosen when the range or precision of single precision would be insufficient. In the IEEE 754-2008 standard, the 64-bit base-2 format is officially referred to as binary64; it was called double in IEEE 754-1985. IEEE 754 specifies additional floating-point formats, including 32-bit base-2 ''single precision'' and, more recently, base-10 representations. One of the first programming languages to provide single- and double-precision floating-point data types was Fortran. Before the widespread adoption of IEEE 754-1985, the representation and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Integer (computer Science)
In computer science, an integer is a datum of integral data type, a data type that represents some range of mathematical integers. Integral data types may be of different sizes and may or may not be allowed to contain negative values. Integers are commonly represented in a computer as a group of binary digits (bits). The size of the grouping varies so the set of integer sizes available varies between different types of computers. Computer hardware nearly always provides a way to represent a processor register or memory address as an integer. Value and representation The ''value'' of an item with an integral type is the mathematical integer that it corresponds to. Integral types may be ''unsigned'' (capable of representing only non-negative integers) or ''signed'' (capable of representing negative integers as well). An integer value is typically specified in the source code of a program as a sequence of digits optionally prefixed with + or −. Some programming languages allow oth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Byte Order
In computing, endianness, also known as byte sex, is the order or sequence of bytes of a word of digital data in computer memory. Endianness is primarily expressed as big-endian (BE) or little-endian (LE). A big-endian system stores the most significant byte of a word at the smallest memory address and the least significant byte at the largest. A little-endian system, in contrast, stores the least-significant byte at the smallest address. Bi-endianness is a feature supported by numerous computer architectures that feature switchable endianness in data fetches and stores or for instruction fetches. Other orderings are generically called middle-endian or mixed-endian. Endianness may also be used to describe the order in which the bits are transmitted over a communication channel, e.g., big-endian in a communications channel transmits the most significant bits first. Bit-endianness is seldom used in other contexts. Etymology Danny Cohen introduced the terms ''big-endian'' a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Byte
The byte is a unit of digital information that most commonly consists of eight bits. Historically, the byte was the number of bits used to encode a single character of text in a computer and for this reason it is the smallest addressable unit of memory in many computer architectures. To disambiguate arbitrarily sized bytes from the common 8-bit definition, network protocol documents such as The Internet Protocol () refer to an 8-bit byte as an octet. Those bits in an octet are usually counted with numbering from 0 to 7 or 7 to 0 depending on the bit endianness. The first bit is number 0, making the eighth bit number 7. The size of the byte has historically been hardware-dependent and no definitive standards existed that mandated the size. Sizes from 1 to 48 bits have been used. The six-bit character code was an often-used implementation in early encoding systems, and computers using six-bit and nine-bit bytes were common in the 1960s. These systems often had memory words ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexadecimal
In mathematics and computing, the hexadecimal (also base-16 or simply hex) numeral system is a positional numeral system that represents numbers using a radix (base) of 16. Unlike the decimal system representing numbers using 10 symbols, hexadecimal uses 16 distinct symbols, most often the symbols "0"–"9" to represent values 0 to 9, and "A"–"F" (or alternatively "a"–"f") to represent values from 10 to 15. Software developers and system designers widely use hexadecimal numbers because they provide a human-friendly representation of binary-coded values. Each hexadecimal digit represents four bits (binary digits), also known as a nibble (or nybble). For example, an 8-bit byte can have values ranging from 00000000 to 11111111 in binary form, which can be conveniently represented as 00 to FF in hexadecimal. In mathematics, a subscript is typically used to specify the base. For example, the decimal value would be expressed in hexadecimal as . In programming, a number of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SFA GeometryCollection
SFA may refer to: In science and technology In medicine * Superficial femoral artery, a large artery in the thigh In chemistry * Saturated fatty acid, a type of fatty acid with no double bonds * Segmented flow analysis, a technique and class of instrument used in chemical analysis * Sodium fluoroacetate, an organofluorine chemical compound, and the sodium salt of fluoroacetic acid In physical science and engineering * Substance flow analysis, a method of analyzing the flows of a material in a well-defined system * Surface forces apparatus, a scientific instrument and technique * Svenska Flygmotor Aktiebolaget late 1940s Swedish aero-engine manufacturer Other uses in science and technology * Sales force automation, information systems used in customer relationship marketing * Simple feature access, a standard storage and access model for geographical data * Single Frequency Approach, an aviation procedure * Stochastic Frontier Analysis, a method of economic modeling * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SFA MultiPolygon With Hole
SFA may refer to: In science and technology In medicine * Superficial femoral artery, a large artery in the thigh In chemistry * Saturated fatty acid, a type of fatty acid with no double bonds * Segmented flow analysis, a technique and class of instrument used in chemical analysis * Sodium fluoroacetate, an organofluorine chemical compound, and the sodium salt of fluoroacetic acid In physical science and engineering * Substance flow analysis, a method of analyzing the flows of a material in a well-defined system * Surface forces apparatus, a scientific instrument and technique * Svenska Flygmotor Aktiebolaget late 1940s Swedish aero-engine manufacturer Other uses in science and technology * Sales force automation, information systems used in customer relationship marketing * Simple feature access, a standard storage and access model for geographical data * Single Frequency Approach, an aviation procedure * Stochastic Frontier Analysis, a method of economic modeling * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SFA MultiPolygon
SFA may refer to: In science and technology In medicine * Superficial femoral artery, a large artery in the thigh In chemistry * Saturated fatty acid, a type of fatty acid with no double bonds * Segmented flow analysis, a technique and class of instrument used in chemical analysis * Sodium fluoroacetate, an organofluorine chemical compound, and the sodium salt of fluoroacetic acid In physical science and engineering * Substance flow analysis, a method of analyzing the flows of a material in a well-defined system * Surface forces apparatus, a scientific instrument and technique * Svenska Flygmotor Aktiebolaget late 1940s Swedish aero-engine manufacturer Other uses in science and technology * Sales force automation, information systems used in customer relationship marketing * Simple feature access, a standard storage and access model for geographical data * Single Frequency Approach, an aviation procedure * Stochastic Frontier Analysis, a method of economic modeling * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SFA MultiLineString
SFA may refer to: In science and technology In medicine * Superficial femoral artery, a large artery in the thigh In chemistry * Saturated fatty acid, a type of fatty acid with no double bonds * Segmented flow analysis, a technique and class of instrument used in chemical analysis * Sodium fluoroacetate, an organofluorine chemical compound, and the sodium salt of fluoroacetic acid In physical science and engineering * Substance flow analysis, a method of analyzing the flows of a material in a well-defined system * Surface forces apparatus, a scientific instrument and technique * Svenska Flygmotor Aktiebolaget late 1940s Swedish aero-engine manufacturer Other uses in science and technology * Sales force automation, information systems used in customer relationship marketing * Simple feature access, a standard storage and access model for geographical data * Single Frequency Approach, an aviation procedure * Stochastic Frontier Analysis, a method of economic modeling * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Line Segment
In geometry, a line segment is a part of a straight line that is bounded by two distinct end points, and contains every point on the line that is between its endpoints. The length of a line segment is given by the Euclidean distance between its endpoints. A closed line segment includes both endpoints, while an open line segment excludes both endpoints; a half-open line segment includes exactly one of the endpoints. In geometry, a line segment is often denoted using a line above the symbols for the two endpoints (such as \overline). Examples of line segments include the sides of a triangle or square. More generally, when both of the segment's end points are vertices of a polygon or polyhedron, the line segment is either an edge (geometry), edge (of that polygon or polyhedron) if they are adjacent vertices, or a diagonal. When the end points both lie on a curve (such as a circle), a line segment is called a chord (geometry), chord (of that curve). In real or complex vector spa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
