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
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