vibeproj.projections.krovak

Krovak projection.

Oblique conformal conic projection used for Czech/Slovak national grids. Implements the Krovak North Orientated variant (EPSG method 1041).

Math follows PROJ krovak.cpp and EPSG Guidance Note 7-2, section 2.4.4.

Classes

Krovak

Oblique conformal conic projection for Czech/Slovak national grids.

Module Contents

class vibeproj.projections.krovak.Krovak

Bases: vibeproj.projections.base.Projection

Oblique conformal conic projection for Czech/Slovak national grids.

name = 'krovak'

setup(params: vibeproj.crs.ProjectionParams) → dict

Compute derived parameters from projection params.

Called once at construction time. Returns a dict of computed params that will be passed to forward/inverse.

forward(lam, phi, params, computed, xp)

Forward projection: geographic (lon, lat in radians) -> projected (x, y in meters).

lam: longitude relative to central meridian (radians), array phi: latitude (radians), array Returns (x, y) in projection-native units (before false easting/northing and scale).

inverse(x, y, params, computed, xp)

Inverse projection: projected (x, y) -> geographic (lon, lat in radians).

x, y: projection-native units (after removing false easting/northing and scale). Returns (lam, phi) in radians, with lam relative to central meridian.