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3 Non-geometry standards
Platform
The platform is the carrier of the sensor. The standard includes dynamic and stationary platforms. The dynamic platforms are spacebome, airborne, landborne, or
waterbome. The stationary platforms are landborne or waterbome. Each platform
has its own characteristics in terms of position, attitude, and motion. For example,
the track of a satellite is smooth and can be modelIed as a Keplerian ellipse whereas
the track of an aircraft is irregular and needs continuous monitoring of its position
and attitude.
Georeference Models
For sensible applications ungeoreferenced imagery data need to be georeferenced.
These imagery data are called georeferenceable. The ISO 19130 standard provides
two models for the georeferencing of imagery to the earth.
The rigorous sensor model assumes a complete knowledge of at least the sensor
geometry and the ground coordinate system to fully describe the involved Coordinate Reference Systems. It is based on the sensor reference to the object coordinate
system. In many cases further knowledge (e.g. about the platform geometry and the
orbit characteristics) is required too. The rigorous model allows for a point wise data
capture with a defined accuracy. Stereo images enable the creation of 3-dimensional
datasets.
Ground control points, the readings from Global Navigation Satellites Systems,
and similar data sources carry the information about the ground Coordinate Reference System.
The fimctional fit models relate image to the earth by simply using a set of common points. The points define a functional relation, which is used to warp the original image towards the geometry of the earth surface. The model does not require any
knowledge of the sensor. The functional fit model establishes an image reference between the remotely sensed data and the ground. The following functional fit methods
are defined in the ISO 19130:
Ground control points
The method is called "Ground control points". The relation between the original
image and the earth's surface is defined by a set of common points. Each point consists of two or three ground point coordinates (x, y, and optional z) and the related
two sensor data coordinates (row and column). It is not specified which functional
relation between image and earth shall be used and thus the type and the values of
the coefficients remain undefined.
Grid interpolation
In this method, geolocation is derived by interpolation in an evenly spaced grid.
Similar to the Ground control points method each grid point consists of three ground
3 Non-geometry standards
Platform
The platform is the carrier of the sensor. The standard includes dynamic and stationary platforms. The dynamic platforms are spacebome, airborne, landborne, or
waterbome. The stationary platforms are landborne or waterbome. Each platform
has its own characteristics in terms of position, attitude, and motion. For example,
the track of a satellite is smooth and can be modelIed as a Keplerian ellipse whereas
the track of an aircraft is irregular and needs continuous monitoring of its position
and attitude.
Georeference Models
For sensible applications ungeoreferenced imagery data need to be georeferenced.
These imagery data are called georeferenceable. The ISO 19130 standard provides
two models for the georeferencing of imagery to the earth.
The rigorous sensor model assumes a complete knowledge of at least the sensor
geometry and the ground coordinate system to fully describe the involved Coordinate Reference Systems. It is based on the sensor reference to the object coordinate
system. In many cases further knowledge (e.g. about the platform geometry and the
orbit characteristics) is required too. The rigorous model allows for a point wise data
capture with a defined accuracy. Stereo images enable the creation of 3-dimensional
datasets.
Ground control points, the readings from Global Navigation Satellites Systems,
and similar data sources carry the information about the ground Coordinate Reference System.
The fimctional fit models relate image to the earth by simply using a set of common points. The points define a functional relation, which is used to warp the original image towards the geometry of the earth surface. The model does not require any
knowledge of the sensor. The functional fit model establishes an image reference between the remotely sensed data and the ground. The following functional fit methods
are defined in the ISO 19130:
Ground control points
The method is called "Ground control points". The relation between the original
image and the earth's surface is defined by a set of common points. Each point consists of two or three ground point coordinates (x, y, and optional z) and the related
two sensor data coordinates (row and column). It is not specified which functional
relation between image and earth shall be used and thus the type and the values of
the coefficients remain undefined.
Grid interpolation
In this method, geolocation is derived by interpolation in an evenly spaced grid.
Similar to the Ground control points method each grid point consists of three ground