New answers tagged proj4
If the dataset should cover the whole African continent, the CRS information is wrong, and WGS84 should be right. If it is really a local CRS, covering 71m eastwards and 73.5m northwards, you have to set up a local CRS on the point of (0;0), which you have to collect with GPS or offical surveying information: +proj=tmerc +lat_0=.... +lon_0=.... +k=0.9999 ...
Try to go to spatial reference To find specific proj4 definition
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