Difference between revisions of "GENIE Gridspec Diagrams Boundary"

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Boundary [[GENIE:Gridspec:Diagrams:ContactRegion|contact regions]] occur where two grid [[GENIE:Gridspec:Diagrams:Tile|tiles]] meet, but do not overlap.  The boundary type below is suitable for grid tiles with logically-rectangular discretisations; it consists of:
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Boundary [[GENIE_Gridspec_Diagrams_ContactRegion|contact regions]] occur where two grid [[GENIE_Gridspec_Diagrams_Tile|tiles]] meet, but do not overlap.  The boundary type below is suitable for grid tiles with logically-rectangular discretisations; it consists of:
  
 
* An anchor point - a point common to both grid tiles;
 
* An anchor point - a point common to both grid tiles;

Latest revision as of 17:56, 26 February 2007

Boundary contact regions occur where two grid tiles meet, but do not overlap. The boundary type below is suitable for grid tiles with logically-rectangular discretisations; it consists of:

  • An anchor point - a point common to both grid tiles;
  • An "alignment" flag, used to indicate whether the anchor point is shared in index space by both tiles;
  • An orientation, which can be used to indicate how vector fields are transformed as they cross the boundary - for instance, whether latitudes on the first grid tile map to latitudes or longitudes on the second grid tile;
  • A refinement, which describes whether grid lines (cell edges) are continuous between tiles, just continuous for the coarser tile, or coprime.
Boundary type.png

Note: the gridspec overview contains introductory and background information on the gridspec; more detailed information can be found in Balaji's gridspec document on the Earth System Curator website.