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"""
Iterate over all ways (and ways only) using node cache to obtain geometries
"""
import osmium
import sys
class WayHandler:
def __init__(self, idx):
self.idx = idx
def way(self, w):
locations = []
for n in w.nodes:
locations.append(idx.get(n.ref)) # note that cache is used here
print(w.id, len(w.nodes), locations)
if len(sys.argv) != 3:
print("Usage: python use_nodecache.py <osm file> <node cache>")
exit()
reader = osmium.io.Reader(sys.argv[1], osmium.osm.osm_entity_bits.WAY)
idx = osmium.index.create_map("sparse_file_array," + sys.argv[2])
lh = osmium.NodeLocationsForWays(idx)
lh.ignore_errors()
osmium.apply(reader, lh, WayHandler(idx))
reader.close()
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