Add OSM PBF encoder #52
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Add osm pbf encoder
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Hello, thank you for providing this fork. I've used it successfully in one of my internal projects, though not without some (easily fixed) issues. I've pointed them out in this review, didn't have time to submit a proper pull request, though I'm considering making my own fork eventually to alleviate a few other pet peeves I have with this library in general.
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| blockData, err := proto.Marshal(block) | ||
| if err != nil { | ||
| return nil |
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Looks like a typo, should return err instead of nil. This came up in my attempt to use this fork, concealing the issue above that quietly omitted all Nodes from the output file.
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| } | ||
| groupDense.Denseinfo.Uid = append(groupDense.Denseinfo.Uid, int32(current.UserID-previous.UserID)) | ||
| groupDense.Denseinfo.Version = append(groupDense.Denseinfo.Version, int32(current.Version-previous.Version)) |
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Versions aren't delta-encoded in the spec, this causes issues with the current decoder. Should just append current.Version.
| for k := range e.reverseStringTable { | ||
| delete(e.reverseStringTable, k) | ||
| } | ||
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I ran into a few issues with Nodes that had empty stringtables, adding this snippet right here before proto.Marshal seemingly solved it for me. I'm assuming it has something to do with missing idx-0 delimiters, but I didn't have time to properly study the spec and figure out if that's the case.
if block.Stringtable == nil {
block.Stringtable = &osmpbf.ForkStringTable{}
}
if block.Stringtable.S == nil {
block.Stringtable.S = []string{""}
}
2 participants
Description
This PR adds a PBF Encoder. It is inspired by
OsmSharp's encoder. Most likely this code can be simplified and made moregoidiomatic.The
Encoderhas a methodEncode(obj osm.Object) errorwhich can be used to encode structs of typeosm.Object.Resolves #48