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MODIS/VIIRS Sinusoidal Land Tile Utilities for Julia

Gregory H. Halverson (they/them)
gregory.h.halverson@jpl.nasa.gov
Lead developer and designer
NASA Jet Propulsion Laboratory

This Julia module provides functions for converting geographic latitude and longitude coordinates to sinusoidal projection coordinates and mapping those to MODIS land tile indices.

Ensure that you have the required dependencies installed before using this module. You may need to install libraries such asArchGDAL.jl for coordinate transformations.

Converts latitude and longitude coordinates to sinusoidal projection coordinates.

latlon_to_sinusoidal(lat::Float64, lon::Float64)::Tuple{Float64, Float64}

• lat::Float64: Latitude in degrees (-90 to 90).
• lon::Float64: Longitude in degrees (-180 to 180).

• Tuple{Float64, Float64}: Sinusoidal projection coordinates(x, y).

x, y=latlon_to_sinusoidal(34.0,-118.0)println("Sinusoidal Coordinates: ($x,$y)")

• Raises an error if latitude is out of range (-90 to 90).
• Raises an error if longitude is out of range (-180 to 180).

Converts sinusoidal projection coordinates to MODIS land tile indices.

sinusoidal_to_modland(x::Float64, y::Float64)::String

• x::Float64: Sinusoidal x coordinate.
• y::Float64: Sinusoidal y coordinate.

• String: MODIS land tile index formatted ashXXvYY.

tile_index=sinusoidal_to_modland(x, y)println("MODIS Tile Index:$tile_index")

• Raises an error ifx is outside the valid bounds.
• Raises an error ify is outside the valid bounds.