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ropensci-archive / bomrang

:warning: ARCHIVED :warning: Australian government Bureau of Meteorology (BOM) data client for R
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Add ability to export GeoTIFF objects as Geopackages? #49

Closed adamhsparks closed 7 years ago

adamhsparks commented 7 years ago

Inspiration from @mdsumner, https://gist.github.com/mdsumner/d1666d0d1ca57493ecd50fa44c8fe6b1

mdsumner commented 7 years ago

As much as I encourage the exploration, I don't think this is likely to be a good option. The main thing is that GeoPackage only supports image data (i. e Greyscale/Byte in one band, or RGB/Byte in three bands) and I suspect you are looking at raster data more generally (?, also maybe my take on GPKG is out of date by now).

GeoTIFF is a very good format, is there specific problems with it? The images I've trawled from BOM in the past were PNG or JPEG and so required (trivial) georegistration by offset/scale, but GeoTIFF would be a very fine outcome there.

Happy to explore the pain points here and figure out what's best!

Generally if it's raster data (not a colour model) then bundling series into NetCDF is best, but otherwise a respectable series of GeoTIFFs is as good as it gets. Neither is perfect, and the best choice can depend on what happens next and by whom, unfortunately.

adamhsparks commented 7 years ago

Thanks for the feedback @mdsumner. It was a thought I had just before bed last night. I've used the vector capabilities in GSODR so thought perhaps this was something to look into.

Saved me some time by tagging you.

It's not as much a pain point as what you said, what happens next? NetCDF was another thought I had. Maybe that is something to think about. Just trying to give some flexibility.

adamhsparks commented 7 years ago

I think I'll just leave this for another day. Not really necessary, we can write NetCDF if we really want, but most users should be able to do that themselves if they wish.

mdsumner commented 7 years ago

No worries, feel free to ping any time, just FYI: I hadn't gotten to trying the new features, but I want to - we will use this, either me or colleagues. Writing NetCDF itself is actually pretty painful if a user has never done it, raster does it but only single slices to variables IIRC.

A templated .nc definition, or navigating writeRaster to ease export from bomrang is the kind of thing I can easily help with.

adamhsparks commented 7 years ago

Thanks @mdsumner, I'll open another issue specifically for NetCDF and we can take a look at providing that functionality.