[mkgmap-dev] Option to output polygons in size order

Sat Jul 23 18:17:23 BST 2016

Hi Ticker/Gerd

The draw order does work for the Legend ( it is the device I have ). I also came across problems with multiple polygons, the problem can be one of several things, not all multi polygons are correct on openstreetmap, I cam across one today "fairhaven lake" golf course, was hiding, due to draw order, but the problem was, it is contained within a polygon for a residential area, so I had to change the data on openstreetmap, to make it an inner polygon. when i download the new OSM data I expect it to work correctly.

if the polygons are set correctly on openstreetmap, then draw order will will as you expect.

Gary

________________________________
From: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> on behalf of Gerd Petermann <GPetermann_muenchen at hotmail.com>
Sent: 23 July 2016 17:05
To: Development list for mkgmap
Subject: Re: [mkgmap-dev] Option to output polygons in size order

Hi Ticker,

are you sure that the order matters? I've never heard that theory

and I would be surprised when that is true.

The normal way to handle the draw order is to use a typ file, not sure

if this works on your device, but it seems to work well for others.

Gerd

________________________________
Von: mkgmap-dev <mkgmap-dev-bounces at lists.mkgmap.org.uk> im Auftrag von Ticker Berkin <rwb-mkgmap at jagit.co.uk>
Gesendet: Samstag, 23. Juli 2016 18:45:59
An: mkgmap development
Betreff: [mkgmap-dev] Option to output polygons in size order

Hi

I'm using splitter-r437/mkgmap-r3676 to make a map for Etrex Legend
from british-isles-latest.osm.pbf from geofabric.de.

Using "default" style and not using a TYP file, no land features
(woods,marsh,green) show because an island polygon for "British Isles"
is rendered near the end, on top of everything else. I guess that the
Etrex has all area types as the same draworder and renders them in file
order.

I presume I could use TYP / _DrawOrder to change this behaviour
slightly but I keep finding examples of woods in islands in lakes in
marsh in islands etc etc, so _DrawOrder can't solve the problem.

What would make everything show correctly would be to output polygons
in size order, largest to smallest. Could this be done easily? either
in splitter then --preserve-element-order, or in mkgmap, possibly after
style processing because there will be a lot fewer polygons at this
point.

Regards
Ticker Berkin

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