I'm just starting out with this so apologies if I explain things poorly.
I have some mapinfo files (TAB, IND, MAP etc) and I am trying to convert to Geojson. I can do this using ogr2ogr
ogr2ogr -f "GeoJSON" 1800-indoor.geojson coverage_LTE1800_Indoor.TAB
however the geojson is very large. Actually however there is a lot of information in the mapinfo file (and thus the geojson file) that I don't actually require. The random example tile of the map is below. Although it may not be apparent there are 5 'levels' of information ranging from 0 - 4.
When I convert the file all that is important is that I preserve the shapes that have a 0 value (although looking in the mapinfo file these values don't seem to be explicit, presumably they are encoded somehow?) but the shapes representing values 1,2,3, and 4 can all be merged together. Visually therefore I would end up with two colours, one that represents 0 and another which represents 1,2,3 and 4 combined.
EDIT - more info added in response to comment:
list of files
example of data in data.map file
000a 0e15 0e16 1ba2 a6ab 1a2a 2fa5 a9b5 a7b5 d90f 1723 131f 2b0f 1723 4f57 639c a4a9 a0a8 ada4 a8ad 161a 390d 1137 a5a9 b5a4 a8ad b2b6 dcbd bdf4 2b2f 55c8 ccd8 c7cb d0d3 d7fd c2c2 f900 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000