Am 01.03.2011 19:47, schrieb Felix Hartmann:
On 01.03.2011 19:44, Henning Scholland wrote:
Am 01.03.2011 19:38, schrieb Felix Hartmann:
On 01.03.2011 19:33, Felix Hartmann wrote:
The following patches are in my eyes really worthwhile and should be
added to trunk. They all work fine without glitches.
1. Drop small Polygons
I am not sure who wrote this patch, but I have been using it longtime
and it certainly does improve map performance especially on higher
resolutions.
It removes all polygons which consist of less than 8 pixels.
If you deem that this is too extreme (though 8 pixels is really
nothing, and polygons of less than 8 pixel size are barely noticeable
anyhow - and only slow down map drawing) the following line could be
reduced to maybe 6 or 4 pixels:
+private static final int MIN_SIZE_POLYGON = 8;
Ups forgot to say, I'm actually using it with a value of 15 and it seems
to work pretty well with 15.
Wont it cause routing errors, if little highway-areas will be removed?
Henning
What do you mean by highway areas? I removes lines consisting of 1 point
but but not on the routing nodes, but only on visual display. A 1point
line cannot exist in resolution 24 but only in resolutions 23 down.
Neither in Mapsource nor on GPS I can see a difference of removing 1
point lines (yes there is a visual difference if removing polygons
smaller than 15 pixels, but that usually makes the map better readable,
15 pixels is still tiny and causes rather a better readable map because
small non identifiable crap gets removed).
I thought about small polygons with highway-tag. If these polygons gets
removed, there will be a gap. Or did I misunderstood your mail and these
polygons will only be removed from drawing but not from routing part of
the map?
Henning
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