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  2. C-squares - Wikipedia

    en.wikipedia.org/wiki/C-squares

    C-squares (acronym for the Concise Spatial QUery And REpresentation System) is a system of spatially unique, location-based identifiers for areas on the surface of the earth, represented as cells from a latitude- and longitude-based Discrete Global Grid at a hierarchical set of resolution steps, obtained by progressively subdividing 10×10 degree World Meteorological Organization squares; the ...

  3. ArcGIS - Wikipedia

    en.wikipedia.org/wiki/ArcGIS

    ArcGIS Engine is an ArcGIS software engine, a developer product for creating custom GIS desktop applications. ArcGIS Engine provides application programming interfaces (APIs) for COM, .NET, Java, and C++ for the Windows, Linux, and Solaris platforms. The APIs include documentation and a series of high-level visual components to ease building ...

  4. Esri - Wikipedia

    en.wikipedia.org/wiki/Esri

    ArcGIS includes Internet capabilities in all Esri software products. The services, provided through ArcGIS Online at www.arcgis.com, include web APIs, hosted map and geoprocessing services, and a user sharing program. A variety of basemaps is a signature feature of ArcGIS Online.

  5. Geographic information system - Wikipedia

    en.wikipedia.org/wiki/Geographic_Information_System

    The core of any GIS is a database that contains representations of geographic phenomena, modeling their geometry (location and shape) and their properties or attributes. A GIS database may be stored in a variety of forms, such as a collection of separate data files or a single spatially-enabled relational database. Collecting and managing these ...

  6. Shapefile - Wikipedia

    en.wikipedia.org/wiki/Shapefile

    The shapefile format is a geospatial vector data format for geographic information system (GIS) software.It is developed and regulated by Esri as a mostly open specification for data interoperability among Esri and other GIS software products. [1]

  7. Proportional symbol map - Wikipedia

    en.wikipedia.org/wiki/Proportional_symbol_map

    Some software, such as Esri ArcGIS Pro, allow for the option to control the size of both ends of the value range. Rather than calculating a true proportionality, the area of the symbol of each intervening value is calculated using a Linear interpolation: [14]: 307

  8. Blank (solution) - Wikipedia

    en.wikipedia.org/wiki/Blank_(solution)

    A blank solution is a solution containing little to no analyte of interest, [1] usually used to calibrate instruments such as a colorimeter. According to the EPA, the "primary purpose of blanks is to trace sources of artificially introduced contamination." [2] Different types of blanks are used to identify the source of contamination in the ...

  9. Principal component analysis - Wikipedia

    en.wikipedia.org/wiki/Principal_component_analysis

    Principal component analysis (PCA) is a linear dimensionality reduction technique with applications in exploratory data analysis, visualization and data preprocessing.. The data is linearly transformed onto a new coordinate system such that the directions (principal components) capturing the largest variation in the data can be easily identified.