[mkgmap-dev] address index question

Sat Nov 24 18:04:14 GMT 2012

Richard Welty <rwelty at averillpark.net> writes:

> On 11/24/12 10:07 AM, Carlos Dávila wrote:
>> El 24/11/12 03:08, Richard Welty escribió:
>>> $ java -jar ../mkgmap/mkgmap-r2379/mkgmap.jar
>>> capitaldistrict-2012-11-23.osm  --index --gmapsupp
>>>     
>>   From mkgmap help:
>> "Note that option order is significant:  An option only applies to
>> subsequent input files."
>> So you should put your *.osm file last in the mkgmap call
> ah, i missed that. the change seems to have done it, address lookups in 
> the nuvi now work.

There's something else that I think is highly non-obvious to new people:
there are a ton of options (no surprise), but the defaults are not
really useful.  The norm among mkgmap users is to give a large number of
options, but for some reason (perhaps trying to keep behavior
consistent) these options are not default.   In the --remove-short-arcs
case, I don't understand why anyone wouldn't want it.

Another point is that you probably want --route in addition to --index.

FWIW, here are the options I use that I suspect everyone should use (or
mine are off from the consensus and I should change):

    --tdbfile \
    --reduce-point-density=4 \
    --reduce-point-density-polygon=8 \
    --merge-lines \
    --route \
    --check-roundabouts \
    --check-roundabout-flares \
    --remove-short-arcs=6 \
    --adjust-turn-headings \
    --report-similar-arcs \
    --report-dead-ends=2 \
    --add-pois-to-areas \
    --index \

(Actually, "everyone should use add-pois-to-areas" is perhaps
controversial.)

I think it would be good for all options to have a --no-option variant,
and then to default each option to what the group consensus is in terms
of "what should a user (who doesn't really understand all the subtleties
yet) who just wants to take OSM bits and make a map for their device for
general use want".
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