Difference between revisions of "GENIE Gridspec Diagrams Boundary"
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| − | Boundary [[ | + | 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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| + | * An anchor point - a point common to both grid tiles; | ||
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| + | * An "alignment" flag, used to indicate whether the anchor point is shared in index space by both tiles; | ||
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| + | * 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. | ||
[[Image:boundary_type.png|center]] | [[Image:boundary_type.png|center]] | ||
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| + | ''Note: the [[GENIE_Gridspec|gridspec overview]] contains introductory and background information on the gridspec; more detailed information can be found in Balaji's gridspec document on the [http://www.earthsystemcurator.org/index.php?option=com_content&task=view&id=38&Itemid=74 Earth System Curator] website.'' | ||
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.
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.