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Unable to replicate output of tags-filter command #273
Description
I have been trying to replicate the output of the following bash command with pyosmium:
osmium tags-filter osm_data/aachen.osm.pbf \
w/highway w/public_transport=platform w/railway=platform w/park_ride r/type=restriction \
-o aachen-filtered2.osm.pbfHere's my python code:
import osmium
# Define the filters for the desired tags
filters = [
osmium.filter.KeyFilter('highway').enable_for(osmium.osm.WAY),
osmium.filter.TagFilter(('public_transport', 'platform')).enable_for(osmium.osm.WAY),
osmium.filter.TagFilter(('railway', 'platform')).enable_for(osmium.osm.WAY),
osmium.filter.KeyFilter('park_ride').enable_for(osmium.osm.WAY),
osmium.filter.TagFilter(('type', 'restriction')).enable_for(osmium.osm.RELATION)
]
# Apply filters using a ForwardReferenceWriter to maintain referential completeness
writer = osmium.ForwardReferenceWriter('aachen-filtered.osm.pbf', ref_src='osm_data/aachen.osm.pbf', overwrite=True)
fp = osmium.FileProcessor('osm_data/aachen.osm.pbf')
# Add filters to the file processor
for f in filters:
fp = fp.with_filter(f)
# Process the file and write filtered data
with writer:
for obj in fp:
writer.add(obj)I would have expected these two to result in the same output file, but that does not seem to be the case.
Here's a comparison of the osmium check-refs command for both files:
# bash command
There are 49207 nodes, 14943 ways, and 272 relations in this file.
Nodes in ways missing: 0
# python code
There are 293587 nodes, 59950 ways, and 1035 relations in this file.
Nodes in ways missing: 0
Could anyone provide an explaination for the difference, to make a working python version of the bash command?
Activity
fbarbe00 commentedon Jan 7, 2025
For reference, the osm file I tried this with comes from here: https://github.com/motis-project/test-data/raw/aachen/aachen.osm.pbf