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MITgcm-contrib / llc_hires

Code customizations and scripts related to LLC4320 family of configurations.
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llc4320 13faces serial number problem #4

Open csy0101 opened 4 years ago

csy0101 commented 4 years ago

I would like to ask how the 13 faces of llc4320 are distributed. If possible, what is the range of latitude and longitude of each face? Or where do I get the information? Thank you

hongandyan commented 4 years ago

as suggested in #1 you might start from a small setup, like llc90. (The geometry is same, except for coarse/fine resolution) Here is the code to look at llc90 tiles and their lat/long info: grid_dataset = xr.open_dataset('ECCOv4r3_grid.nc') XC = grid_dataset.XC YC = grid_dataset.YC for tile in range(13): xc=XC.isel(tile=tile).values yc=YC.isel(tile=tile).values print([tile+1, xc.min(), xc.max(), yc.min(), yc.max()])

and result: [1, -111.60647, 64.81917, -89.873055, -57.271408] [2, -37.5, 51.5, -56.73891, 9.482398] [3, -37.837925, 51.837925, 10.458642, 71.83288] [4, 52.5, 141.5, -88.10267, -57.271408] [5, 52.5, 141.5, -56.73891, 9.482398] [6, 52.162075, 141.83792, 10.458642, 71.83288] [7, -179.98895, 179.9739, 67.57341, 89.739395] [8, -179.97452, 179.96242, 10.458642, 71.83288] [9, -179.5, 179.5, -56.73891, 9.482398] [10, -179.96747, 179.98691, -89.873055, -57.271408] [11, -127.83792, -38.162075, 10.458642, 71.83288] [12, -127.5, -38.5, -56.73891, 9.482398] [13, -127.5, -38.5, -88.10267, -57.271408]

where "ECCOv4r3_grid.nc" can be found here https://ecco.jpl.nasa.gov/drive/files/Version4/Release3_alt/nctiles_grid/ECCOv4r3_grid.nc https://ecco.jpl.nasa.gov/drive/files/Version4/Release4/nctiles_grid/ECCO-GRID.nc https://web.corral.tacc.utexas.edu/OceanProjects/ECCO/ECCOv4/Release3_alt/nctiles_grid/ECCOv4r3_grid.nc

menemenlis commented 4 years ago

As Hong pointed out the geometry of llc4320 is the same as that of llc90, llc270, etc. Attached is a graphical representation but note that it is a lot easier to think of llc geometry in terms of 5 facets as opposed to 13 tiles.

On Sep 2, 2020, at 2:12 AM, csy0101 notifications@github.com wrote:

I would like to ask how the 13 faces of llc4320 are distributed. If possible, what is the range of latitude and longitude of each face? Or where do I get the information? Thank you