98
3 Non-geometry standards
hyperspatial tessellation is dynamic. Hs basic partition is a multi-dimensional quadrilateral grid. While irregularly distributed data is stored in the dataset, the atoms of
the hyperstructure are filled in with different intensity. Once the fill-grade of an atom
reaches a threshold-value, it is then divided by two in each dimension. This means
for example, that in the 3-dimensonal space a cube is split into 8 smaller cubes. The
Riemann hyperspatial tessellation is widely used in domains with large amounts of
irregularly spaced data like in hydrography.
~ r-------~--------,-----------------~
44°40'51.8"N
68°36'85.0"W
O°r-----------~----~----~----------~~~~~~
-~ ~------------------~--------------------~
-180°
O·
180°
Fig. 3.21. 2-dimensional example ofa Riemann hyperspace (Varma 2003)
An irregular grid is typical for swath-data. The scan-lines of swath data are not
exactIy parallel, because the sensor is in motion on a satellite- or on an aircraftplatform while the image is taken.
The ISO 19129 also covers systemic compression. It compresses data using content information. An example for a systernic compression is a topographie map
where all information above water bodies is omitted.
Elements not referenceable to existing ISO 19100 standards
The radiometry is barely dealt with in the existing ISO 19100 standards. It inc1udes the filtering of images, the histogram analysis, principle component transformation, and the adaption of neighbouring images.
3 Non-geometry standards
hyperspatial tessellation is dynamic. Hs basic partition is a multi-dimensional quadrilateral grid. While irregularly distributed data is stored in the dataset, the atoms of
the hyperstructure are filled in with different intensity. Once the fill-grade of an atom
reaches a threshold-value, it is then divided by two in each dimension. This means
for example, that in the 3-dimensonal space a cube is split into 8 smaller cubes. The
Riemann hyperspatial tessellation is widely used in domains with large amounts of
irregularly spaced data like in hydrography.
~ r-------~--------,-----------------~
44°40'51.8"N
68°36'85.0"W
O°r-----------~----~----~----------~~~~~~
-~ ~------------------~--------------------~
-180°
O·
180°
Fig. 3.21. 2-dimensional example ofa Riemann hyperspace (Varma 2003)
An irregular grid is typical for swath-data. The scan-lines of swath data are not
exactIy parallel, because the sensor is in motion on a satellite- or on an aircraftplatform while the image is taken.
The ISO 19129 also covers systemic compression. It compresses data using content information. An example for a systernic compression is a topographie map
where all information above water bodies is omitted.
Elements not referenceable to existing ISO 19100 standards
The radiometry is barely dealt with in the existing ISO 19100 standards. It inc1udes the filtering of images, the histogram analysis, principle component transformation, and the adaption of neighbouring images.