# za_cdngi_README.txt

The files in this section result from the conversion of datasets originating
from [CD:NGI](http://www.ngi.gov.za/)

## Included grids

### South African vertical grid:

*Source*: [CD:NGI](ftp://ftp.trignet.co.za/South%20African%20Geoid)
*Format*: GeoTIFF converted from 'ASCII Gridded XYZ'
*License*: [Creative Commons CC BY 4.0](https://creativecommons.org/licenses/by/4.0/)
*Credit*: (c) CD:NGI Chief Directorate: National Geospatial Information
*Horizontal CRS*: EPSG:7910 (ITRF2005)

Vertical transformation for Geoid model SAGEOID2010. Used to make the transitions
from heights in vertical CRS (EPSG:9279 - SA LLD height) to heights above the ellipsoid in ITRF2005 (EPSG:7910).

* za_cdngi_sageoid2010.tif