More refactoring of lookup module #204

Job	Run time
lock-gdal (ubuntu-latest, 3.8)	1m 2s
lock-gdal (ubuntu-latest, 3.12)	44s
lock-gdal (macos-latest, 3.8)	1m 21s
lock-gdal (macos-latest, 3.12)	1m 3s
lock-gdal (windows-latest, 3.8)	1m 21s
lock-gdal (windows-latest, 3.12)	1m 23s
install-gdal-with-conda (ubuntu-latest, 3.8)	40s
install-gdal-with-conda-lock (ubuntu-latest, 3.8)	1m 15s
install-gdal-with-conda (macos-latest, 3.8)	1m 7s
install-gdal-with-conda-lock (ubuntu-latest, 3.12)	1m 21s
install-gdal-with-micromamba (ubuntu-latest, 3.8)	31s
install-gdal-with-conda (windows-latest, 3.8)	3m 28s
install-gdal-with-conda-lock (macos-latest, 3.8)	1s
install-gdal-with-micromamba (macos-latest, 3.8)	50s
install-gdal-with-conda-lock (macos-latest, 3.12)	1s
install-gdal-with-micromamba (windows-latest, 3.8)	1m 11s
install-gdal-with-conda-lock (windows-latest, 3.8)	4m 32s
install-gdal-with-conda-lock (windows-latest, 3.12)	4m 19s
	26m 10s

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