Add 2 grid files for nl_nsgi (#137)

Add nl_nsgi_bontrans2004.tif and nl_nsgi_nllat2018.tif

Author: Jochem-L

Diff for: copyright_and_licenses.csv

@@ -213,8 +213,10 @@ nc_dittt_gr3dncI08.tif,Gouvernement de Nouvelle Calédonie - DITTT,Open License
 nc_dittt_Ranc08_Circe.tif,Gouvernement de Nouvelle Calédonie - DITTT,Open License France - https://www.etalab.gouv.fr/wp-content/uploads/2014/05/Open_Licence.pdf,,
 nc_dittt_RANC15.tif,Gouvernement de Nouvelle Calédonie - DITTT,Open License France - https://www.etalab.gouv.fr/wp-content/uploads/2014/05/Open_Licence.pdf,1.14,
 nc_dittt_README.txt,Disclaimed,Public domain,,
+nl_nsgi_bontrans2004.tif,Disclaimed,Public domain,1.22,
 nl_nsgi_naptrans2018.tif,Nederlandse Samenwerking Geodetische Infrastructuur (NSGI),CC-BY-4.0,,1.10
 nl_nsgi_nlgeo2018.tif,Nederlandse Samenwerking Geodetische Infrastructuur (NSGI),CC-BY-4.0,,
+nl_nsgi_nllat2018.tif,Nederlandse Samenwerking Geodetische Infrastructuur (NSGI),CC-BY-4.0,1.22,
 nl_nsgi_rdcorr2018.tif,Nederlandse Samenwerking Geodetische Infrastructuur (NSGI),CC-BY-4.0,,
 nl_nsgi_rdtrans2018.tif,Nederlandse Samenwerking Geodetische Infrastructuur (NSGI),CC-BY-4.0,,
 nl_nsgi_README.txt,Disclaimed,Public domain,,

Diff for: nl_nsgi/nl_nsgi_README.txt

@@ -5,24 +5,50 @@ The files in this section originate from [NSGI](https://www.nsgi.nl/) with corre
 
 ## Included grids
 
-### Netherlands: RD and NAP -> ETRS89
+### European Netherlands: RD and NAP -> ETRS89
 
-*Source*: [NSGI](https://www.nsgi.nl/rdnaptrans)  
+*Source*: [NSGI](https://www.nsgi.nl/coordinatenstelsels-en-transformaties/coordinatentransformaties/rdnap-etrs89-rdnaptrans)  
 *Format*: GeoTIFF converted from NTv2 & GTX  
 *License*: [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/)  
 
-Variant 1:
+#### Variant 1:
 
 * nl_nsgi_rdcorr2018.tif
 * nl_nsgi_nlgeo2018.tif
 
-Recommended variant, applies the datum transformation as a separate step using
-a 3D similarity transformation.
+Recommended variant, applies the datum transformation as a separate step using a 3D similarity transformation.
 
-Variant 2:
+#### Variant 2:
+
+N.A. only relevant for PROJ 4
+
+#### Hybrid variant:
 
 * nl_nsgi_rdtrans2018.tif
+* nl_nsgi_nlgeo2018.tif
 
 Includes the datum transformation in the correction grid.
 
 Refer to the [RDNAPTRANS™2018 documentation](https://www.nsgi.nl/rdnaptrans) for details.
+
+
+### European Netherlands: LAT -> ETRS89
+
+*Source*: [NSGI](https://www.nsgi.nl/coordinatenstelsels-en-transformaties/coordinatentransformaties/nllat-nap-etrs89)  
+*Format*: GeoTIFF converted from GTX  
+*License*: [Creative Commons Attribution 4.0](https://creativecommons.org/licenses/by/4.0/)  
+
+* nl_nsgi_nllat2018.tif
+
+Refer to the [NLLAT2018 documentation](https://www.defensie.nl/downloads/applicaties/2020/06/12/nllat2018) for details.
+
+
+### Caribbean Netherlands: Bonaire height system KADpeil -> ITRS
+
+*Source*: [NSGI](https://www.nsgi.nl/coordinatenstelsels-en-transformaties/coordinatentransformaties/dpnet-itrs-bestrans)  
+*Format*: GeoTIFF converted from GTX  
+*License*: Derived from work by NGA. Public Domain. 
+
+* nl_nsgi_bongeo2004.tif
+
+Refer to the [BESTRANS2020 documentation](https://www.nsgi.nl/coordinatenstelsels-en-transformaties/coordinatentransformaties/dpnet-itrs-bestrans) for details.

Diff for: nl_nsgi/nl_nsgi_bongeo2004.tif

@@ -211,7 +211,9 @@ nc_dittt_Ranc08_Circe.tif
 nc_dittt_RANC15.tif
 nc_dittt_README.txt
 NKG
+nl_nsgi_bongeo2004.tif
 nl_nsgi_nlgeo2018.tif
+nl_nsgi_nllat2018.tif
 nl_nsgi_rdcorr2018.tif
 nl_nsgi_rdtrans2018.tif
 nl_nsgi_README.txt