[OSM-dev] Wanted: OBF file format description

[Bernhard R. Fischer]

On 2016-07-07 03:13, Jesse Phillips wrote:
> I haven't worked with this format, but I think this file does provide all
> the information needed to parse an OBF.
> 
> https://github.com/osmandapp/OsmAnd-resources/blob/master/protos/OBF.proto
> 
> The key here is that the OsmAndStructure message can't be parsed with a
> ProtocolBuffer implementation. Most of the fields are fixed at 32 bytes (to
> allow for random access). Check the comments to see which fields these are.
> 
> I don't know what the OsmAndTileBox is suppose to provide, but it has the
> comment "everything is encoded as 31 tile zoom" so that will need to be
> part of the utilization of that data.
> 
> Other than OsmAndstructure I think everything else is readable through
> standard ProtocolBuffers.
> 
> This information only really helps for parsing the information,
> manipulating it is a completely different mater and requires understanding
> how all the elements relate.
> 
> Good luck.
> 
> On Wed, Jul 6, 2016 at 11:27 AM Bernhard R. Fischer <bf at abenteuerland.at>
> wrote:
> 
>> But still, even if it contains protobuf, that does not say anything
>> because protobuf is a generic format such us XML. Knowing that something
>> is XML does not explain the elements within the file ;)
>>
>> Bernhard
>>
> 


Thank you very much, that looks like a good starting point :)

Best regards,
Bernhard