MKGmap Postcodes and Garmin

General talk
1

My weapon of choice is a Garmin Nuvi 50, which uses gmapsupp.img in it’s memory card to tell me where the heck I’m going.

My work gives me postcodes to locate the various jobs for the day. Without postcodes, I’m lost.
I live in Scotland, right next to the newly build M8 and M74 motorways.

You have a system which makes a gmapsupp.img for me with (hopefully) updated roads. But it doesn’t do postcodes.

I have to drive to different locations every day, invariably along the M8/M74, which the garmin now insists I am driving on grassland and farmer’s fields, and demands I turn around and head for a road all the time. This was alright at the start of the road works 2 years ago, but now it lasts for about 90 miles.

Garmin have always been useless at updating the roads in Scotland, so no hope there. But it does do postcodes.

Your image file when downloaded is much better, but as it doesn’t do postcodes, is of no use.

I have downloaded the British postcodes (all 2 and a half milion of them) with latitude and longitude to 7 decimals. I also found somewhere that I should process the csv file to an OSM file using GPSBabel. This I have done.

I’ve downloaded MKGMap as well as the latest osm.pbf, and I’m ready to go! Somewhere…

Bearing in mind I can only use Linux, what should I do next?

2

I don’t think that mkgamp supports post codes in address. You better create a map, which uses post code as a POI label or street name.

3

I got completely confused when registering.
Started posting on https://wiki.openstreetmap.org/wiki/Mkgmap/help/options#Using_preprocessed_bounds_for_the_address_index
Then registered, and ended up here by mistake, reposting.
Sorry about that.
I’ll stick to the thread above.
Needless to say that thread is going the same way as this one. I’m just not savvy enough to understand what anyone is talking about.

4

Well, it’s been a few years and the question is still the same.
I now have gpsbabel and its GUI - and I still have all them postcodes.
I can therefore hopefully go the .gpx route (no pun intended).
Will putting in a new gpx file delete the one in the Nuvi?
Do I therefore pull that file out of the device and add the postcodes to it?
I have the postcode csv file which is just under 1GB in size
Here are the first 5 columns (there are 39 columns in total)

Postcode,In Use?,Latitude,Longitude,Easting,Northing,Grid Ref
AB1 0AA,No,57.101474,-2.242851,385386,801193,NJ853011
AB1 0AB,No,57.102554,-2.246308,385177,801314,NJ851013
AB1 0AD,No,57.100556,-2.248342,385053,801092,NJ850010
AB1 0AE,No,57.084444,-2.255708,384600,799300,NO845992
AB1 0AF,No,57.096656,-2.258102,384460,800660,NJ844006

What is the actual format of a POI csv file?
Does the POI use Eastings, lat - or grid reference? It gives all 3.
There are 3½ million lines to go through.