which holds more data raster or vector gis

#WHICH HOLDS MORE DATA RASTER OR VECTOR GIS FREE#

Data are stored and rendered at some degree of representation resolution. Resolution: The degree of detail to which a phenomenon is detected or represented.

Sometimes referred to as a cell or grid point. Pixel: A portmanteau of “picture element”, the smallest unit of a raster.

Mixed pixel: A condition whereby more than one category of object is present within a single grid cell.

#WHICH HOLDS MORE DATA RASTER OR VECTOR GIS FREE#

In cartography and GIS, the extent of a representation is the size of the real space being represented.įile format: The specification for how data is stored a computer file. Important distinctions include those between binary and plaintext approaches, and between proprietary and free and open formats. Advantages and Disadvantages of the Raster Data ModelĢ.5D: A system of recording values on a raster in which each grid cell has one and only one z-value.Ĭontinuous data: Field-like data in which values are present at any point within the spatial extent, such as elevation or temperature.ĭigital elevation model (DEM): A data model used to process, store, analyze, and display elevation data.ĭigital surface model (DSM): A type of DEM that represents a maximum value within a grid cell, thereby recording the tops of buildings, trees, and other objects.ĭigital terrain model (DTM): A type of DEM that aims to represent an idealized land surface where surface objects (buildings, trees, etc.) have been digitally removed.ĭiscrete data: Object-like data, in which the spatial extent or boundaries of the features are definable.Įxtent: The area or distance in real space over which some geographic entity exists.

Which holds more data raster or vector gis