# nc_dittt_README.txt

The files in this section result from the conversion of datasets originating
from [Gouvernement de la Nouvelle-Calédonie – DITTT](https://dittt.gouv.nc/circe-pour-la-nouvelle-caledonie)

## Included grids

### New Caledonia: IGN72 GRANDE TERRE (EPSG:4662) to RGNC91-93 (EPSG:4906) (using Geocentric correction)

*Source*: Gouvernement de la Nouvelle-Calédonie – DITTT](https://dittt.gouv.nc/circe-pour-la-nouvelle-caledonie)  
*Format*: GeoTIFF converted from .mnt file with convert_gr3dnc01b.py  
*License*: [License Ouverte (in French)](https://www.etalab.gouv.fr/wp-content/uploads/2017/04/ETALAB-Licence-Ouverte-v2.0.pdf) / [Open License (English translation)](https://www.etalab.gouv.fr/wp-content/uploads/2014/05/Open_Licence.pdf)
*Used by*: [EPSG:9329 Transformation](https://www.epsg-registry.org/export.htm?gml=urn:ogc:def:coordinateOperation:EPSG::9329)

* nc_dittt_gr3dnc01b.tif

### New Caledonia - Noumea: IGN72 GRANDE TERRE (EPSG:4662) to RGNC91-93 (EPSG:4906) (using Geocentric correction)

*Source*: Gouvernement de la Nouvelle-Calédonie – DITTT](https://dittt.gouv.nc/circe-pour-la-nouvelle-caledonie)  
*Format*: GeoTIFF converted from .mnt file with convert_gr3dnc02b.py  
*License*: [License Ouverte (in French)](https://www.etalab.gouv.fr/wp-content/uploads/2017/04/ETALAB-Licence-Ouverte-v2.0.pdf) / [Open License (English translation)](https://www.etalab.gouv.fr/wp-content/uploads/2014/05/Open_Licence.pdf)
*Used by*: [EPSG:9330 Transformation](https://www.epsg-registry.org/export.htm?gml=urn:ogc:def:coordinateOperation:EPSG::9330)

* nc_dittt_gr3dnc02b.tif

### New Caledonia - Noumea: NEA74 Noumea (EPSG:4644) to RGNC91-93 (EPSG:4906) (using Geocentric correction)

*Source*: Gouvernement de la Nouvelle-Calédonie – DITTT](https://dittt.gouv.nc/circe-pour-la-nouvelle-caledonie)  
*Format*: GeoTIFF converted from .mnt file with convert_gr3dnc03a.py  
*License*: [License Ouverte (in French)](https://www.etalab.gouv.fr/wp-content/uploads/2017/04/ETALAB-Licence-Ouverte-v2.0.pdf) / [Open License (English translation)](https://www.etalab.gouv.fr/wp-content/uploads/2014/05/Open_Licence.pdf)
*Used by*: [EPSG:9328 Transformation](https://www.epsg-registry.org/export.htm?gml=urn:ogc:def:coordinateOperation:EPSG::9328)

* nc_dittt_gr3dnc03a.tif

### New Caledonia - RGNC91-93 (EPSG:4907) to NGNC08 height (EPSG:9351) (geoid model)

*Source*: Gouvernement de la Nouvelle-Calédonie – DITTT](https://dittt.gouv.nc/circe-pour-la-nouvelle-caledonie)  
*Format*: GeoTIFF converted from .mnt file with vertoffset_grid_to_gtiff.py  
*License*: [License Ouverte (in French)](https://www.etalab.gouv.fr/wp-content/uploads/2017/04/ETALAB-Licence-Ouverte-v2.0.pdf) / [Open License (English translation)](https://www.etalab.gouv.fr/wp-content/uploads/2014/05/Open_Licence.pdf)
*Used by*: [EPSG:9352 Transformation](https://www.epsg-registry.org/export.htm?gml=urn:ogc:def:coordinateOperation:EPSG::9352)

* nc_dittt_Ranc08_Circe.tif
