[mkgmap-dev] [PATCH] alpha patch (V4) for simplifying ways and reducing img size

Tue Apr 14 16:34:21 BST 2009

On Mon, Apr 13, 2009 at 1:50 PM, Johann Gail <johann.gail at gmx.de> wrote:
>> On my eTrex when I zoom out to scales of 50 or 80 km, it can take a very
>> long time for the device to draw the map. From my observation of the way the
>> map is drawn, it seems like the highways are drawn segment by segment.
>>
> Yes, I made the same observation. The highways gets drawn segment by
> segment. Therefore I introduced the switch --merge-lines, which should merge
> the segements.

My initial observations are that with --merge-lines set, and
simplification set to the default level,

- map compilation takes significantly longer, and

- display in my eTrex is significantly faster.

In my opinion, it's worth the wait. :-) Of course, I did not have
repeatable test cases to create empirical values for the drawing
times: these initial observations are completely subjective.

Cheers.