Struct ObliqueMercatorProjection 

pub struct ObliqueMercatorProjection<const C: i64> { /* private fields */ }

Oblique Mercator

Classification: Conformal cylindrical

Available forms: Forward and inverse, spherical and ellipsoidal

Defined area: Global, but reasonably accurate only within 15 degrees of the oblique central line

Alias: omerc

Domain: 2D

Input type: Geodetic coordinates

Output type: Projected coordinates

Projection String

+proj=omerc +lat_1=45 +lat_2=55

Required Parameters

• +lat_1=<value>: Latitude of the first point on the central line.
• +lat_2=<value>: Latitude of the second point on the central line.

Optional Parameters

• +alpha=<value>: Azimuth of the centerline clockwise from north at the center point of the line.
• +gamma=<value>: Azimuth of the centerline clockwise from north of the rectified bearing of the centerline.
• +lonc=<value>: Longitude of the projection center (overrides +lon_0).
• +lat_0=<value>: Latitude of the projection center.
• +no_rot: Disables rectification (historical reason).
• +no_off: Disables origin offset to the center of projection.
• +k_0=<value>: Scale factor at the central line.
• +x_0=<value>: False easting.
• +y_0=<value>: False northing.

Usage Example

echo 12 55 | proj +proj=omerc +alpha=90 +ellps=GRS80
echo 12 55 | proj +proj=omerc +alpha=0 +R=6400000
echo 12 55 | proj +proj=omerc +lon_1=0 +lat_1=-1 +lon_2=0 +lat_2=0 +R=6400000
echo 12 55 | proj +proj=tmerc +R=6400000
echo 12 55 | proj +proj=omerc +lon_1=-1 +lat_1=1 +lon_2=0 +lat_2=0 +ellps=GRS80
echo 10.536498003 56.229892362 | cs2cs +proj=longlat +ellps=GRS80 +to +proj=omerc +axis=wnu +lonc=9.46 +lat_0=56.13333333 +x_0=-266906.229 +y_0=189617.957 +k=0.9999537 +alpha=-0.76324 +gamma=0 +ellps=GRS80

Caveats

The two-point method with no rectification is probably only marginally useful.

Trait Implementations

impl<const C: i64> Clone for ObliqueMercatorProjection<C>

fn clone(&self) -> ObliqueMercatorProjection<C>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<const C: i64> CoordinateStep for ObliqueMercatorProjection<C>

fn new(proj: Rc<RefCell<Proj>>) -> Self

Create a new Converter

fn forward<P: TransformCoordinates>(&self, p: &mut P)

forward conversion

fn inverse<P: TransformCoordinates>(&self, p: &mut P)

inverse conversion

impl<const C: i64> Debug for ObliqueMercatorProjection<C>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<const C: i64> PartialEq for ObliqueMercatorProjection<C>

fn eq(&self, other: &ObliqueMercatorProjection<C>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<const C: i64> ProjectCoordinates for ObliqueMercatorProjection<C>

fn code(&self) -> i64

ESPG code for this projection

fn name(&self) -> &'static str

Projection name

fn names() -> &'static [&'static str]

Returns the list of canonical names for this projection. This is an associated function, similar to a static method.

fn datum_type() -> u8

get the datum type. Defaults to no datum

impl<const C: i64> StructuralPartialEq for ObliqueMercatorProjection<C>