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Tricks & Tips: If ... then else end
More Tricks
mkgmap now supports if then statements but you need to be careful!
Example 1
if (access=no) then
else
end
NOT:
if access=no then
Example 2
if (access=no) then
access=no {echotags "access=no"}
else
access=* {echotags "access=*"}
end
NOT:
if (access=no) then
{echotags "access=no"}
else
{echotags "access=*"}
end
Example 3:
Checking if lines have an area tag
if (area=yes) then
# allow for routing but make it invisible (ie 0x0B is a routable line made transparent in TYP file
# Use 'continue' else polygon residential highway will not be parse:remember:
# lines are always parsed before polygons
highway=residential [0x0b road_class=0 road_speed=1 resolution 24 continue]
else
highway=residential [0x07 road_class=0 road_speed=1 resolution 24 ]
end
Example 4
if (highway=* & railway=*) then
# ie railway=abandoned and highway=track
else
end
Example 5
The following does not work!
if (highway=track) then
[0x0A resolution 24]
else
[0x0C resolution 24]
end
It needs to be
if (highway=track) then
highway=track [0x0A resolution 24]
else
highway=* [0x0C resolution 24]
end