[mkgmap-dev] [PATCH v1] Fix housenumber assignment for streets with refs

Fri Jun 21 22:06:30 BST 2013

On 20/06/13 22:00, WanMil wrote:
> @Steve: I found a comment in MDRFile.addStreet that tells me that the
> name including the shield is used for MDR7. I have changed that in the
> patch because I didn't understand why the shield is included. Can you
> check your comment and remember about your intention? ;-)

The index is an index of what is actually in the .img files. That
includes the shield and all the other special characters.
Therefore you need to sort on that.

If you were only removing the shield then it might still work, but the
patch appears to be removing the reference too. I don't think that
will work.

The history is that originally, before we had NET, roads could only
have one name.  Thus people started creating names that contained both
the name and the ref.  Its all very innovative, but in real Garmin
maps road names are set in NET and there are up to four names.
Usually the ref is first (if there is one), followed by the
street name (again if there is one).

I'm not sure about under what circumstances the other names can be
used, but I have noticed one case that is relevant to house numbers
where you have a block of flats with its own name.
So the address might be 1 Golden Towers, Long Lane, London, and the
NET might include 'Golden Towers' and 'Long Lane' in the road names.

So when NET was added, we didn't revert to a proper split between
road name and ref. That hasn't mattered until now...

So I see we now do this:

006243a7 | 43 23 03                | Label 0x032343: ^EA4019 TEWKESBURY ROAD
006243aa | 5a 23 03                | Label 0x03235a: TEWKESBURY ROAD (A4019)
006243ad | 35 22 83                | Label 0x032235: A4019

And it should really be

006243a7 | 43 23 03                | Label 0x032343: ^EA4019
006243aa | 5a 23 03                | Label 0x03235a: TEWKESBURY ROAD

..Steve