[mkgmap-dev] What should be in the global index by default?

Sun May 7 16:20:24 BST 2017

Hi Andrzej,

thanks for the hints reg. Mapsource. I've not noticed the option "Find nearest places" (Ctrl+Shift+F).   You are right, this seems to ignore the index and shows all possible catgories 
and the search field for strings is named "Containing" and works like that, "net" finds Planet and Netto.
The normal find (Ctrl+F) depends on the index. The dialog is probably created based on data in Mdr18+Mdr19, not Mdr4.

I try to get a Nüvi from my mother to find out more details. Maybe index usage also depends on the number of tiles in map.

Gerd
________________________________________
Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Andrzej Popowski <popej at poczta.onet.pl>
Gesendet: Sonntag, 7. Mai 2017 15:54
An: mkgmap-dev at lists.mkgmap.org.uk
Betreff: Re: [mkgmap-dev] What should be in the global index by default?

Hi Gerd,

there are 2 search algorithms in Garmin devices. One uses index, second
search near current position and probably uses data directly in img. You
can see both versions in Mapsource. Under "Find" menu there are options
"Find Places", which uses index and "Find Nearest Places", which doesn't.

If you start "Find Places", then you get 4 categories. I guess they
could represent 4 different section of index. These are: cities,
features (POIs), addresses and intersections.

Under feature you find categories and subcategories. These are device
specific, could be different in a GPS. I think categories are dependent
on index too, since map created by mkgmap behaves differently than
cgpsmapper version, even if they contain the same POIs.

Search in BaseCamp is weird. I think developers got some idea to
integrate multiple algorithms into single search. It took them years to
get it working and it still confuses me.

Search in GPS seems to work similar to Mapsource. If you search for a
name, then most probably it uses index. I'm not sure about search for a
category. I think outdoor GPS starts with search near current position
but maybe car GPS uses index.

--
Best regards,
Andrzej
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