air quality assessment & management
Reference and User Manual
      AirWare   On-line Reference Manual
        Release Level 6.2 preliminary
        Release Date 2013 XX
        Revision Level under revision
      Last modified on:   Thursday, 12-Dec-13 11:14 CET

      Matrix Object

      Spatially distributed models require spatially distributed input data, and produce spatially distributed results.

      In AirWare, all model related spatial data use the same, common data format and are described as matrix OBJECT.
      Matrix objects are read-only, they are generated by

      • external tools like GRASS as model inputs, see, for example: DUST model inputs
      • model pre-processors
      • model generated output.

      Matrix objects (which can contain one or more 2D matrice, in vertical or temporal sequence) are accessible from a number of model and emisison scenario pages:

      • enumerate

      Basic attributes are summarized in the matrix META_DATA.

      • the model domain that provides location references; these include:
      • map coordinates of the origin (lower left corner);
      • aspect ratio (symbolic selection between square 1:1 and landscape 4:3);
      • East-West extent in km
      • North-South extent in km (computed, read only)
      • area covered (in km², computed, read only).
      • Matrix geometry:
        • cell size (only square cells are supported;
        • number of cells in X and Y directions.
      • Parameter (based on a Descriptor, the parameter is either scalar or a 2D vector in case of wind fields)
      • number of layers
      • time stamp of first (set of) matrices
      • number of time steps

      • Statistics:
        • average, minimum, maximum, non-zero average, histogram (10 classes, color coded with automatically generated raibow colors also used for 2D display).

      Please note: a complex system of matrix analysis/comparison similar to the time series analysis is in preparation for future releases.

      Matrix display

      When a matrix is selected from the selector/navigator, its default display shows the first instance( lowest layer, first time step) color coded corresponding to the histogram. Selector/buttons (tape deck) support switching between layers and time steps. The matrix can also be shown in a full-size pop-up window for more detail.

      Matrix import

      An interactive import function supports the upload of matrices prepared by external tools such as a spreadsheet.

      Matrix export

      Model results matrices can be

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