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Open Source Geospatial Foundation
The Open Source Geospatial Foundation (OSGeo), is a non-profit non-governmental organization whose mission is to support and promote the collaborative development of open geospatial technology, technologies and data. The foundation was formed in February 2006 to provide financial, organizational and legal support to the broader Free Software, Libre/Free and Open-source-software movement, open-source geospatial community. It also serves as an independent legal entity to which community members can contribute code, funding and other resources. OSGeo draws governance inspiration from several aspects of the Apache Foundation, including a membership composed of individuals drawn from foundation projects who are selected for membership status based on their active contribution to foundation projects and governance. The foundation pursues goals beyond software development, such as promoting more Open data, open access to government produced geospatial data, FAIR_data geodata, and geoda ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Arnulf Christl
Arnulf is a masculine German given name. It is composed of the Germanic names, Germanic elements ''arn'' "eagle" and ''ulf'' "wolf". The ''-ulf, -olf'' suffix was an extremely frequent element in Germanic onomastics and from an early time was perceived as a mere suffix forming given names. Similarly, the suffix ''-wald, -ald, -old'', originally from ''wald'' "rule, power" underwent semantic weakening. Therefore, the name ''Arnulf'' and ''Arnold (given name), Arnold'' were often conflated in early medieval records, as is the case with bishop Arnulf of Metz (died 640), especially as the final consonant came to be dropped (''Arnoul''). The name ''Arnulf'' is attested from as early as the 5th century, as the name of the brother of Odoacer. The name is attested with some frequency in History of Germany#Middle Ages, Medieval Germany throughout the 8th to 11th centuries, in the spelling variants ''Arnulf, Arnulph, Arnolf'', occasionally also as ''Arenulph, Harnulf, Harnolf, Harnolph''. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Mailing List
A mailing list is a collection of names and addresses used by an individual or an organization to send material to multiple recipients. Mailing lists are often rented or sold. If rented, the renter agrees to use the mailing list only at contractually agreed-upon times. The mailing list owner typically enforces this by " salting" (known as "seeding" in direct mail) the mailing list with fake addresses and creating new salts for each time the list is rented. Unscrupulous renters may attempt to bypass salts by renting several lists and merging them to find common, valid addresses. Mailing list brokers exist to help organizations rent their lists. For some list owners, such as specialized niche publications or charitable groups, their lists may be some of their most valuable assets, and mailing list brokers help them maximize the value of their lists. Transmission may be paper-based or electronic. Each has its strengths, although a 2022 article claimed that compared to email, " di ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Geospatial Topology
Geospatial topology is the study and application of qualitative spatial relationships between geographic features, or between representations of such features in geographic information, such as in geographic information systems (GIS). For example, the fact that two regions ''overlap'' or that one ''contains'' the other are examples of topological relationships. It is thus the application of the mathematics of topology to GIS, and is distinct from, but complementary to the many aspects of geographic information that are based on quantitative spatial measurements through coordinate geometry. Topology appears in many aspects of geographic information science and GIS practice, including the discovery of inherent relationships through spatial query, vector overlay and map algebra; the enforcement of expected relationships as validation rules stored in geospatial data; and the use of stored topological relationships in applications such as network analysis. Spatial topology is the g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Raster Graphics
upright=1, The Smiley, smiley face in the top left corner is a raster image. When enlarged, individual pixels appear as squares. Enlarging further, each pixel can be analyzed, with their colors constructed through combination of the values for red, green and blue. In computer graphics and digital photography, a raster graphic, raster image, or simply raster is a two-dimensional image or picture represented as a rectangular Matrix (mathematics), matrix or grid of pixels, viewable via a computer display, paper, or other display medium. A raster image is technically characterized by the width and height of the image in pixels and by the number of bits per pixel. Raster images are stored in image files with varying dissemination, production, generation, and acquisition formats. The printing and prepress industries know raster graphics as contones (from "continuous tones"). In contrast, '' line art'' is usually implemented as vector graphics in digital systems. Many raster ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Image Processing
An image or picture is a visual representation. An image can be two-dimensional, such as a drawing, painting, or photograph, or three-dimensional, such as a carving or sculpture. Images may be displayed through other media, including a projection on a surface, activation of electronic signals, or digital displays; they can also be reproduced through mechanical means, such as photography, printmaking, or photocopying. Images can also be animated through digital or physical processes. In the context of signal processing, an image is a distributed amplitude of color(s). In optics, the term ''image'' (or ''optical image'') refers specifically to the reproduction of an object formed by light waves coming from the object. A ''volatile image'' exists or is perceived only for a short period. This may be a reflection of an object by a mirror, a projection of a camera obscura, or a scene displayed on a cathode-ray tube. A ''fixed image'', also called a hard copy, is one that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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GRASS GIS
''Geographic Resources Analysis Support System'' (commonly termed ''GRASS GIS'') is a geographic information system (GIS) software suite used for geospatial data management and analysis, image processing, producing graphics and maps, spatial and temporal modeling, and visualizing. It can handle raster, topological vector, image processing, and graphic data. GRASS contains over 350 modules to render maps and images on monitor and paper; manipulate raster and vector data including vector networks; process multispectral image data; and create, manage, and store spatial data. It is licensed and released as free and open-source software under the GNU General Public License (GPL). It runs on multiple operating systems, including , Windows and Linux. Users can interface with the software features through a graphical user interface (GUI) or by ''plugging into'' GRASS via other software such as QGIS. They can also interface with the modules directly through a bespoke shell that the appl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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QGIS
QGIS is a geographic information system (GIS) software that is free and open-source. QGIS supports Windows, macOS, and Linux. It supports viewing, editing, printing, and analysis of geospatial data in a range of data formats. Its name comes from an abbreviation of its previous name, Quantum GIS. Functionality QGIS functions as geographic information system (GIS) software, allowing users to analyze and edit spatial information, in addition to composing and exporting graphical maps. QGIS supports raster, vector, mesh, and point cloud layers. Vector data is stored as either point, line, or polygon features. Multiple formats of raster images are supported, and the software can georeference images. QGIS supports shapefiles, personal geodatabases, dxf, MapInfo, PostGIS, and other industry-standard formats. Web services, including Web Map Service and Web Feature Service, are also supported to allow use of data from external sources. QGIS integrates with other open-source GIS ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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PostGIS
PostGIS ( ) is an open source software program that adds support for geographic objects to the PostgreSQL object-relational database. PostGIS follows the Simple Features for SQL specification from the Open Geospatial Consortium (OGC). PostGIS is implemented as a ''PostgreSQL external extension''. Features * Geometry types for Points, LineStrings, Polygons, MultiPoints, MultiLineStrings, MultiPolygons, GeometryCollections, 3D types TINS and polyhedral surfaces, including solids. * Spheroidal types under the geography datatype Points, LineStrings, Polygons, MultiPoints, MultiLineStrings, MultiPolygons and GeometryCollections. * raster type - supports various pixel types and more than 1000 bands per raster. Since PostGIS 3, is a separate PostgreSQL extension called postgis_raster. * SQL/MM Topology support - via PostgreSQL extension postgis_topology. * Spatial predicates for determining the interactions of geometries using the 3x3 DE-9IM (provided by the GEOS (software library), GEO ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Orfeo Toolbox
In computer science, Orfeo Toolbox (OTB) is a software library for processing images from Earth observation satellites. OTB was initiated by the French space agency (CNES) in 2006. The software is released under a free licence; a number of contributors outside CNES are taking part in development and integrating into other projects. The library was originally targeted at high resolution images acquired by the Orfeo constellation: Pléiades and Cosmo-Skymed, but it also handles other sensors. Purpose OTB provides: * Image access: read/write access for most remote sensing image formats (using GDAL), meta-data access, visualization * Data access: vector data access (shapefile, kml), DEM model, lidar data * Filtering: blurring, denoising, enhancement for optical or radar data * Feature extraction: texture computations including Haralick, SFS, Pantex, Edge density, points of interest, alignments, lines, SIFT, SURF * Image segmentation: region growing, watershed, level set ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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PROJ
In algebraic geometry, Proj is a construction analogous to the spectrum-of-a-ring construction of affine schemes, which produces objects with the typical properties of projective spaces and projective varieties. The construction, while not functorial, is a fundamental tool in scheme theory. In this article, all rings will be assumed to be commutative and with identity. Proj of a graded ring Proj as a set Let S be a commutative graded ring, whereS = \bigoplus_ S_iis the direct sum decomposition associated with the gradation. The irrelevant ideal of S is the ideal of elements of positive degreeS_+ = \bigoplus_ S_i .We say an ideal is homogeneous if it is generated by homogeneous elements. Then, as a set,\operatorname S = \. For brevity we will sometimes write X for \operatorname S. Proj as a topological space We may define a topology, called the Zariski topology, on \operatorname S by defining the closed sets to be those of the form :V(a) = \, where a is a homogeneous idea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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JTS Topology Suite
JTS Topology Suite (Java Topology Suite) is an open-source Java software library that provides an object model for Euclidean planar linear geometry together with a set of fundamental geometric functions. JTS is primarily intended to be used as a core component of vector-based geomatics software such as geographical information systems."The 2012 Free and Open Source GIS Software Map – A Guide to facilitate Research, Development and Adoption" , S. Steiniger and A.J.S. Hunter It can also be used as a general-purpose library providing s in [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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Open Source
Open source is source code that is made freely available for possible modification and redistribution. Products include permission to use and view the source code, design documents, or content of the product. The open source model is a decentralized software development model that encourages open collaboration. A main principle of Open-source software, open source software development is peer production, with products such as source code, blueprints, and documentation freely available to the public. The open source movement in software began as a response to the limitations of proprietary code. The model is used for projects such as in open source appropriate technology, and open source drug discovery. Open source promotes universal access via an open-source or free license to a product's design or blueprint, and universal redistribution of that design or blueprint. Before the phrase ''open source'' became widely adopted, developers and producers used a variety of other terms, suc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |