CoordOp

Description

Name

class Tinman.Georef.CoordOp

Derived from

CoordOpBase

A horizontal coordinate operation (i.e. map projection).

Fields / Optional

id

Type

Georef.Id

Default

null

The unique registry ID of well-known objects.

name

Type

string

Default

null

The human-readable name of this object.

method

Type

CoordOp.Type

Default

CoordOp.Type.none

The coordinate operation method to use.

angle

Type

Param

Default

null

Grid rotation angle (defaults to 0).

The following geo-referencing attributes are mapped to this parameter:

  • EPSG-8814: Angle from Rectified to Skew Grid: gamma_c

  • EPSG-8831: Zone width: W

  • GeoTIFF-3096: ProjRectifiedGridAngleGeoKey

  • OpenGIS WKT1: rectified_grid_angle

azimuth

Type

Param

Default

null

Azimuth rotation angle (defaults to 0).

The following geo-referencing attributes are mapped to this parameter:

  • EPSG-1036: Co-latitude of cone axis: alpha_c

  • EPSG-8813: Azimuth at projection centre: alpha_c

  • GeoTIFF-3094: ProjAzimuthAngleGeoKey

  • OpenGIS WKT1: azimuth

easting

Type

Param

Default

null

Map easting value.

The following geo-referencing attributes are mapped to this parameter:

  • EPSG-8806: False easting: FE

  • EPSG-8816: Easting at projection centre: E_c

  • EPSG-8826: Easting at false origin: E_f

  • GeoTIFF-3082: ProjFalseEastingGeoKey

  • GeoTIFF-3086: ProjFalseOriginEastingGeoKey

  • GeoTIFF-3090: ProjCenterEastingGeoKey

  • OpenGIS WKT1: false_easting

For coordinate systems with westing, the negated easting parameter value is used as input for the coordinate operation.

latitude

Type

Param

Default

null

Reference latitude angle of map projection (defaults to 0).

The following geo-referencing attributes are mapped to this parameter:

  • EPSG-8801: Latitude of natural origin: phi_o

  • EPSG-8811: Latitude of projection centre: phi_c

  • EPSG-8821: Latitude of false origin: phi_f

  • EPSG-8828: Spherical latitude of origin

  • EPSG-8832: Latitude of standard parallel: phi_f

  • GeoTIFF-3081: ProjNatOriginLatGeoKey

  • GeoTIFF-3085: ProjFalseOriginLatGeoKey

  • GeoTIFF-3089: ProjCenterLatKey

  • OpenGIS WKT1: latitude_of_center

  • OpenGIS WKT1: latitude_of_origin

In the special case where conflicting geo-referencing attributes would be mapped to this parameter, some attributes will be mapped to CoordOp.parallel1 instead.

longitude

Type

Param

Default

null

Reference longitude angle of map projection (defaults to 0).

The following geo-referencing attributes are mapped to this parameter:

  • EPSG-8802: Longitude of natural origin: lambda_o

  • EPSG-8812: Longitude of projection centre: lambda_c

  • EPSG-8822: Longitude of false origin: lambda_f

  • EPSG-8829: Spherical longitude of origin

  • EPSG-8830: Initial longitude: lambda_i

  • EPSG-8833: Longitude of origin: lambda_o

  • GeoTIFF-3080: ProjNatOriginLongGeoKey

  • GeoTIFF-3084: ProjFalseOriginLongGeoKey

  • GeoTIFF-3088: ProjCenterLongKey

  • GeoTIFF-3095: ProjStraightVertPoleLongGeoKey

  • OpenGIS WKT1: central_meridian

  • OpenGIS WKT1: longitude_of_center

  • OpenGIS WKT1: longitude_of_origin

The prime meridian is not added automatically to longitude parameters.

northing

Type

Param

Default

null

Map northing value.

The following geo-referencing attributes are mapped to this parameter:

  • EPSG-8807: False northing: FN

  • EPSG-8817: Northing at projection centre: N_c

  • EPSG-8827: Northing at false origin: N_f

  • GeoTIFF-3083: ProjFalseNorthingGeoKey

  • GeoTIFF-3087: ProjFalseOriginNorthingGeoKey

  • GeoTIFF-3091: ProjCenterNorthingGeoKey

  • OpenGIS WKT1: false_northing

For coordinate systems with southing, the negated northing parameter value is used as input for the coordinate operation.

parallel1

Type

Param

Default

null

Latitude of first parallel.

The following geo-referencing attributes are mapped to this parameter:

  • EPSG-8818: Latitude of pseudo standard parallel: phi_p

  • EPSG-8823: Latitude of 1st standard parallel: phi_1

  • GeoTIFF-3078: ProjStdParallel1GeoKey

  • OpenGIS WKT1: pseudo_standard_parallel_1

  • OpenGIS WKT1: standard_parallel_1

In the special case where conflicting geo-referencing attributes would be mapped to CoordOp.latitude, the following attributes will be mapped to this parameter to resolve the conflict:

  • EPSG-8821: Latitude of false origin: phi_f

  • GeoTIFF-3085: ProjFalseOriginLatGeoKey

parallel2

Type

Param

Default

null

Latitude of second parallel.

The following geo-referencing attributes are mapped to this parameter:

  • EPSG-8824: Latitude of 2nd standard parallel: phi_2

  • GeoTIFF-3079: ProjStdParallel2GeoKey

  • OpenGIS WKT1: standard_parallel_2

scale

Type

Param

Default

null

Map scale factor (defaults to 1).

The following geo-referencing attributes are mapped to this parameter:

  • EPSG-1038: Ellipsoid scaling factor

  • EPSG-8805: Scale factor at natural origin: k_o

  • EPSG-8815: Scale factor at projection centre: k_c

  • EPSG-8819: Scale factor on pseudo standard parallel: k_p

  • GeoTIFF-3092: ProjScaleAtNatOriginGeoKey

  • GeoTIFF-3093: ProjScaleAtCenterGeoKey

  • OpenGIS WKT1: scale_factor

height

Type

Param

Default

null

Height value.

The following geo-referencing attributes are mapped to this parameter:

  • EPSG-1039: Projection plane origin height: h_o

For coordinate systems with depth, the negated height parameter value is used as input for the coordinate operation.