# au_icsm_README.txt

The files in this section result from the conversion of datasets originating
from [ICSM]

## Included grids

### Australia: AGD66 -> GDA94

*Source*: [ICSM]  
*Format*: GeoTIFF convered from NTv2  
*License*: [Creative Commons Attribution 4.0]

Full national coverage two-way transformation file – see Appendix B
in the [GDA2020 Technical Manual] for details.

* au_icsm_A66_National_13_09_01.tif

### Australia: AGD84 -> GDA94

*Source*: [ICSM]  
*Format*: GeoTIFF convered from NTv2  
*License*: [Creative Commons Attribution 4.0]

Full coverage two-way transformation file in those states that
originally adopted AGD84 - West Australia, South Australia, Queensland – see
Appendix B in the [GDA2020 Technical Manual] for details.

* au_icsm_National_84_02_07_01.tif

### Australia: GDA94 -> GDA2020

*Source*: [ICSM]  
*Format*: GeoTIFF convered from NTv2  
*License*: [Creative Commons Attribution 4.0]

Full national coverage two-way transformation files – See Sections 3.2
and 3.7 in the [GDA2020 Technical Manual] for details.
Table 3.4 details which grid to use.

* au_icsm_GDA94_GDA2020_conformal.tif
* au_icsm_GDA94_GDA2020_conformal_and_distortion.tif
* au_icsm_GDA94_GDA2020_conformal_christmas_island.tif
* au_icsm_GDA94_GDA2020_conformal_cocos_island.tif

[Creative Commons Attribution 4.0]: https://creativecommons.org/licenses/by/4.0/
[GDA2020 Technical Manual]: http://www.icsm.gov.au/datum/gda2020-and-gda94-technical-manuals
[ICSM]: https://github.com/icsm-au/transformation_grids