[mkgmap-dev] Feature Request: mkgmap able to create gmap archive (BaseCamp)

Sun Dec 4 10:38:27 GMT 2016

thomas,

thanks for the explanation.

Source files (map itself and typ files) handed over to gmapi-builder.py 
have just been created one step before by mkgmap.

I've just made the same process with another Perimeter, Switzerland, and 
the same thing happens.

But as stated originally: I'm not sure how bad this error is as:

  * the image directory with these tbd file is useable in BaseCamp
  * the created gmap directory is usable in BaseCamp
  * the created gmapsupp.img out of the same source files is usable too

Either a misinterpretation of gmapi-builder.py or something which is 
handled wrongly in mkgmap, but as it appears without doing too much damage.
But that's just a rough guess from what I see from the outside..... I'm 
the wrong person to track that down to the root cause.

But I'm always willing and able to test and provide results.

Cheers
Patrik

On 04.12.2016 11:13, Thomas Morgenstern wrote:
>
> In tdb file exists such block 0x54. And it must have 20 byte. in your 
> example i see only 18 byte ? Block 0x54 contains  CRC sum of the tdb 
> file ( without the 0x54 block) the crc is stored in byte 0x54+5, 
> 0x54+12, 0x54+15, 0x54+20.
>
> 0x54+5=Int(nCRCSum / 16777216)  'vByteD
>
> 0x54+12=Int((nCRCSum - vByteD * 16777216) / 65536) ' vByteC
>
> 0x54+15=Int((nCRCSum - vByteD * 16777216 - vByteC * 65536) / 256)    
> 'vByteB
>
> 0x54+20=Int(nCRCSum - vByteD * 16777216 - vByteC * 65536 - vByteB * 256)
>
> all other bytes=0
>
> thomas
>
>
> Am 04.12.2016 um 10:40 schrieb Patrik Brunner:
>> Steve,
>>
>> I've downloaded both versions of gmapi-builder.py, the one from 
>> bitbucket and the one from the mkgmap code base. They're bit 
>> different and I couldn't find a version number when checking quickly, 
>> but only the mkgmap version supports -i for mdx files. Therefore I 
>> continued with the mkgmap codebase version only.
>>
>> The tool runs through and creates a loadable gmap directory for 
>> BaseCamp (tested only on Windows).
>>
>> But it also give out an 'error' or 'warning' about an unknown block, 
>> possibly to be checked further when implementing in mkgmap:
>>
>>     Unknown Block: 54, length: 20,
>>     '\x00\x00\xf7\x00\x00\x00\x00\x00\x00j\x00\x00\x99\x00\x00\x00\x00`\x00\x00'
>>
>> Attached the complete command output ran with -v.... please ignore 
>> the copyright/license output... the strange content is testing stuff 
>> from another construction area, as you know... license information 
>> and unicode  ;-)
>>
>> Testing inside this construction area will be next on my list for 
>> today...
>>
>> Thanks and regards
>> Patrik
>>
>> On 03.12.2016 23:26, Steve Ratcliffe wrote:
>>> Hi
>>>
>>>> I'm wondering if it would be possible that mkgmap is able to
>>>> create/convert maps also in the gmap (gmapi) format used for 
>>>> BaseCamp on
>>>> Windows and Macintosh.
>>>
>>> Yes, this seems a reasonable thing to do.
>>>
>>> In the mkgmap code base there is a python program called
>>> gmapi-builder.py in the scripts directory.
>>>
>>> See also https://bitbucket.org/berteun/gmapibuilder/overview
>>> and http://wiki.openstreetmap.org/wiki/Gmapibuilder.
>>>
>>> This is a converter, but should work on all platforms with python
>>> installed, or could be made to do so...
>>> The first step is to verify that it works; then it should
>>> be easy enough to implement within mkgmap itself.
>>>
>>> ..Steve
>>> _______________________________________________
>>> mkgmap-dev mailing list
>>> mkgmap-dev at lists.mkgmap.org.uk
>>> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
>>
>>
>>
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>
>
>
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