I am searching for a way to convert the european DEM (EU-DEM https://www.eea.europa.eu/data-and-maps/data/eu-dem#tab-european-data) to (xy)z. In fact I'd only like to obtain the z-data (elevation). Input format is geoTiff.
I tried the conversion geoToff to xyz using the "gdal2xyz" plugin. The only problem - disk space. Even converting "small" geoTiffs (~200MB) of course results in a huge xyz-file >20GB. I want to convert a input-file size 22.3GB (!)
Basically I don't need the x and y, only the z (elevation). Each z-Point could be addressed by selecting the correct line in the output-file.
A litte background: This dataset (csv/txt) will be used in a microcontroller (80MHz, ~100kB RAM) application from a SD-Card. I will have a basic file system (FatFS) where I can jump to a desired line.
How do I convert to a "z-file"?