[Talk-us] Great Lakes missing after osmosis update (diffs installation)

Pilon, Michel (SSC/SPC) michel.pilon at canada.ca
Tue Oct 3 17:31:27 UTC 2017

Hello Kevin,

Have you gotten a chance to validate the coastlines of the Great Lakes during the last weekend?
You’re the only one who responded to my “help” request….



From: kevin.b.kenny at gmail.com [mailto:kevin.b.kenny at gmail.com] On Behalf Of Kevin Kenny
Sent: September 28, 2017 16:37
To: Pilon, Michel (SSC/SPC) <michel.pilon at canada.ca>
Cc: talk-us at openstreetmap.org
Subject: Re: [Talk-us] Great Lakes missing after osmosis update (diffs installation)

On Thu, Sep 28, 2017 at 1:23 PM, Pilon, Michel (SSC/SPC) <michel.pilon at canada.ca<mailto:michel.pilon at canada.ca>> wrote:
Hello all,

I am in the process of putting in place a local OSM server.

Last Thursday September 21st I populated my PostGIS database using the following command:

osm2pgsql --create --slim --flat-nodes /data/osm/pgload/flat_nodes.bin \
         -C 27000 --number-processes 8 --hstore \
         --style /data/osm/openstreetmap-carto-3.2.0/openstreetmap-carto.style \
         --multi-geometry /data/osm/new_planet-latest.osm.pbf

Once done I verified the slippymap and I can see correctly all the Canadian/US Great Lakes.

So I applied the daily updates on the data using osmosis (daily diff).   Once completed, everything looks good EXCEPT that there is no more water on Great Lakes except Lac Érié and Ontario for ALL ZOOM LEVELS. Superior, Michigan and Huron Lakes just disappeared!

For the update process, I am using /usr/bin/openstreetmap-tiles-update-expire with the followng options for osm2pgsql command:
               OSM2PGSQL_OPTIONS="--number-processes 8 --hstore -C 27000 --style /data/osm/openstreetmap-carto-3.2.0/openstreetmap-carto.style --multi-geometry"

I am using mapnik with openstreetmap-carto stylesheets.

I am really stuck and need help as I tried it 3 times, always with the result of Lakes disappearing for all zoom levels… ☹

Any ideas???

Thanks in advanced for your very appreciated help….

Someone probably broke the coastline again. It's easy to goof when editing the lake shore.
I don't have time to look into it right now, I can try on the weekend if someone else doesn't fix it first.
(And, I confess, I've broken the lake shore of Lake Ontario at least once.
I fixed it promptly once I realized the problem.)
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