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Digitizing

[data capture] The process of converting the geographic features on an analog map into digital format using a digitizing tablet, or digitizer, which is connected to a computer. Features on a paper map are traced with a digitizer puck, a device similar to a mouse, and the x,y coordinates of these features are automatically recorded and stored as spatial data.

Source: http://support.esri.com/en/other-resources/gis-dictionary/term/digitizing

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Database

 A logical collection of interrelated information, managed and stored as a unit. A GIS database includes data about the spatial location and shape of geographic features recorded as points, lines, and polygons as well as their attributes. 

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DBMS

Database management system. DBMS sometimes refers to the software that contains and organizes the data, and sometimes refers to an organizational plan for the use of information within a single project, or within one unit or the whole of an organization.

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Digital Orthophotos Quadrangle (DOQ)

[file format] DOQ is a geometrically-corrected photograph produced by the USGS. Orthoimages are geometrically corrected and have an area of interest with a scale of 1:40,000. The spatial resolution is about 1 meter pixels.

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Digital Line Graph (DLG)

[file format] DLG is vector data format developed and distributed by the United States Geological Survey (USGS). DLGs depict information about geographic features about terrain, administrative, hydrography, transportation, man-made features and more.

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Database Schema

[data structure] A database schema is supported in relational database management systems (RDBMS) and acts as blueprints for how database entry will be constructed.

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Digital Raster Graphics (DRG)

[file format] DRG is a digital version map of USGS topographic maps. They include imagery (NAIP), roads, place names, hydrography, elevation contours and boundaries.

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Digital Surface Model (DSM)

[file format] A digital surface model is an elevation that includes the top of buildings, tree canopy, powerlines and other features above the bare earth. For example, the first return of LiDAR consists of a DSM.

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Digital Terrain Model (DTM)

[file format] DTM is a bare earth representation of the Earth’s surface that is augmented natural features such as ridges and breaklines.

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Digitize

[editing] When you digitize in a GIS, you are creating geographic computer-compatible stored data with lines, points and polygons in a spatial database.

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Digital Elevation Model (DEM)

Model ketinggian digital

Geospatial

Sistem Maklumat Geografi

Dataset of elevation values that are assigned algorithmically to 2-dimensional coordinates.

Model digital ketinggian permukaan topografi bumi tidak termasuk butiran semulajadi atau struktur binaan buatan manusia seperti bangunan dan tumbuh-tumbuhan atau DEM juga dipanggil sebagai lapisan tanah kosong (bare-earth) bagi permukaan topografi bumi.
 

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Data Model

[data structure] The two main GIS data models are rasters (grids) and vectors. Rasters are sets of pixels with a specific cell size. Vectors represent points, lines and polygons.

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Data Encoding

Converting data to machine-readable format