Krovak Oblique Conformal Conic Projection

sc_projections_krovak.png

 

 

An oblique variation of the Lambert Conformal Conic projection. The standard Lambert Conformal Conic projection places the axis of the projection cone coincident with the minor axis of the Earth ellipsoid. That is, the axis of the cone is normal to the Earth ellipsoid at the pole.

 

The Krovak projection places the axis of the cone normal to the Earth ellipsoid at some other location and so the line of the axis of the cone intersects the minor axis at some defined angle.

 

Scale

 

True only along the pseudo standard parallel.

 

Distortion

 

Free of distortion only along the pseudo standard parallel.

 

Usage

 

Used in the Czech Republic and Slovakia

 

Limitations

 

Use only for a single hemisphere centered on the given central latitude and longitude.

 

Origin

 

Created by Professor Josef Krovak of Czechoslovakia in 1922 for tax and topographic maps for the Czechoslovakian geodetic service.

 

Limiting Forms

 

The Lambert Conformal Conic projection when the axis is normal to the pole.

 

Options

 

Specify the Center Latitude and Center Longitude (normally centered on the area of interest). The Azimuth of the center line is the true azimuth of the center line passing through the center of the projection. This is also known as the "co-latitude" of the cone axis at point of intersection with the ellipsoid.

 

The Latitude of pseudo standard parallel is the latitude of the radius arc on the cone that is true to scale.