How to edit a local pbf and update the source

Question

Hello all,

I have a local OSRM server where I do some traffic simulations for studies, and I need to change some maxspeeds on the map.

What I am trying to do:

Download a pbf from geofrabrik
use osmosis to cut a small chunk where I want to edit. -
edit the chunk with JOSM And now I am stucked on how I merge the edits with the original pbf. I tried use osmosis to calculate diff, but if I use:

osmosis --read-xml file="sudeste-latest-osm_02.osm" --read-pbf file="sudeste-latest.osm.pbf" --derive-change --write-xml-change file="changeset.osc"

When I apply the diffs to the original "sudeste-latest" with:

osmosis --read-xml-change file="changeset.osc" --read-pbf file="sudeste-latest.osm.pbf" --apply-change --write-pbf file="sudeste-new.osm.pbf"

The output file contains only the chunk that I updated.

If I calculated the diffs with:

osmosis --read-pbf file="sudeste-latest.osm.pbf" --read-xml file="sudeste-latest-osm_02.osm" --derive-change --write-xml-change file="changeset.osc"

When I apply the osc, none of my changes was applied. What I'm doing wrong?

Thank you!

Answer 1

1

Osmosis doesn't understand the JOSM xml file.

Osmium might work (I'm not sure): https://docs.osmcode.org/osmium/latest/osmium-apply-changes.html

If you create objects, you might also have to synthesize positive ids for them to satisfy the OSRM importer (I don't know if it supports negative ids or not).

permanent link

answered 28 Apr '21, 03:08

maxerickson
12.7k●10●83●176
accept rate: 32%

Nice! I will give a try using Osmium!

Apparently, if instead of derive changes from the bigger pbf, I use the edited chunk against the non-edited chunk:

osmosis --read-xml file="sudeste-latest-osm_02_new.osm" --read-pbf file="sudeste-latest-osm_02_old.osm" --derive-change --write-xml-change file="changeset.osc"

Them the changeset was applied to the original pbf, but Osmium seems to me to be more cleaner, let see!

Thank you!

(28 Apr '21, 18:18) rafaelricco

How to edit a local pbf and update the source

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