stilt.Grid#

class stilt.Grid(*, xmin: float, xmax: float, ymin: float, ymax: float, xres: float, yres: float, crs: str = '+proj=longlat') → None[source]#

Footprint grid: longitude/latitude bounds, cell size, and CRS.

The bounds are always longitude/latitude. With a projected crs, the grid covers the bounds’ extent in that projection and xres and yres are in its units.

Parameters#

Parameter	Description	Default
`xmin`	Western edge, in degrees longitude.	Required
`xmax`	Eastern edge, in degrees longitude.	Required
`ymin`	Southern edge, in degrees latitude.	Required
`ymax`	Northern edge, in degrees latitude.	Required
`xres`	Cell width in projection units (degrees for longlat, meters for UTM).	Required
`yres`	Cell height in projection units (degrees for longlat, meters for UTM).	Required
`crs`	Coordinate reference system of the footprint grid, such as a PROJ string or `EPSG:32612`. Particles and bounds are projected to it before gridding. Also read under STILT-R’s name, `projection`.	`'+proj=longlat'`

Attributes#

`axes`	Cell-center coordinates `(x, y)` in projection units, ascending.
`cells`	Every cell center as flat `(x, y)` arrays, with `x` varying slowest.
`dims`	The names of a footprint's horizontal dimensions on this grid, `("lat", "lon")` or `("y", "x")`.
`index`	Index of every cell, in the same order as `cells`.
`is_longlat`	Whether the grid is in longitude/latitude degrees.

Methods#

to_xarray()

Return the grid as a CF-1.8 dataset of cell centers.