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  2. Esri grid - Wikipedia

    en.wikipedia.org/wiki/Esri_grid

    The binary format is widely used within Esri programs, such as ArcGIS, while the ASCII format is used as an exchange, or export format, due to the simple and portable ASCII file structure. The grid defines geographic space as an array of equally sized square grid points arranged in rows and columns.

  3. ArcGIS - Wikipedia

    en.wikipedia.org/wiki/ArcGIS

    ArcGIS Pro 2.6 was released in July 2020. [60] Noted features added included: [61] Voxel layers are 3D representations of data over space and time and are saved in a netCDF file. [62] Voxel layers are used to visualize complex layers such as atmospheric and oceanic data or space-time cubes. These layers are used to analyze spatial patterns of ...

  4. GIS file format - Wikipedia

    en.wikipedia.org/wiki/GIS_file_format

    The major difference from a photograph is that the grid is registered to geographic space rather than a field of view. The resolution of the raster data set is its cell width in ground units. Because a grid is a sample of a continuous space, raster data is most commonly used to represent geographic fields , in which a property varies ...

  5. ArcInfo - Wikipedia

    en.wikipedia.org/wiki/ArcInfo

    ArcInfo (formerly ARC/INFO) is a full-featured geographic information system produced by Esri, and is the highest level of licensing (and therefore functionality) in the ArcGIS Desktop product line. It was originally a command-line based system. The command-line processing abilities are now available through the GUI of the ArcGIS Desktop ...

  6. Spatial analysis - Wikipedia

    en.wikipedia.org/wiki/Spatial_analysis

    [23] [24] Schematic and example of a space-time prism using transit network data: On the right is a schematic diagram of a space-time prism, and on the left is a map of the potential path area for two different time budgets. [25] The uncertain geographic context problem, or UGCoP, was first coined by Dr. Mei-Po Kwan in 2012.

  7. 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]

  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. σ-algebra - Wikipedia

    en.wikipedia.org/wiki/Σ-algebra

    In mathematical analysis and in probability theory, a σ-algebra ("sigma algebra"; also σ-field, where the σ comes from the German "Summe" [1]) on a set X is a nonempty collection Σ of subsets of X closed under complement, countable unions, and countable intersections. The ordered pair (,) is called a measurable space.