1OSMIUM-DERIVE-CHANGES(1) OSMIUM-DERIVE-CHANGES(1)
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6 osmium-derive-changes - create OSM change files from two OSM data files
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9 osmium derive-changes [OPTIONS] OSM-FILE1 OSM-FILE2
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12 Finds differences between two OSM files and creates a change file with
13 those differences. The resulting change file is created in a way, that
14 it could be applied on OSM-FILE1 to re-create OSM-FILE2.
15 Objects in both input files must be sorted by type, ID, and version.
17 The first input file must be from a point in time before the second
18 input file.
19 Only object type, id, and version are compared, so this program will
21 not detect differences in, say, the tags, unless the object has a new
22 version, which is the normal way things work in OSM. If you need to
23 compare all data in OSM files, have a look at the osmium diff program.
24 For this command to create a proper change file you have to set the
26 –output option or –output-format option in a way that it will generate
27 an .osc file, typically by using something like `-o out.osc.gz'. You
28 can create any other OSM file format, but that is usually not what you
29 want. Osmium derive-changes will warn you in this case.
30 Note that for objects that are in OSM-FILE1 but not OSM-FILE2 a
32 “deleted” entry will be created in the output. But because we can not
33 know when this deletion actually occurred, in which changeset, and by
34 which user, it is unclear what attributes this deleted object should
35 have. Also, if you are working with extracts, the object might not
36 actually have been deleted in the OSM database, but just moved out of
37 the extract you are looking at. So a real, new, “deleted” version was
38 never created. Usually the “deleted” object will get the same version
39 number and timestamp as the object in OSM-FILE1 had, all other informa‐
40 tion will be removed. But you can change this using the –incre‐
41 ment-version, –keep-details, and –update-timestamp options. Depending
42 on which software you are using the change files with, different set‐
43 tings might be necessary.
44 This commands reads its input files only once and writes its output
46 file in one go so it can be streamed, ie. it can read from STDIN and
47 write to STDOUT.
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50 –increment-version
51 Increment version number of deleted objects.
52 –keep-details
54 Keep details of deleted objects. Usually only id, version, and
55 timestamp are kept. If this option is set all attributes, all
56 tags, and all nodes or members for ways and relations, respec‐
57 tively, are kept.
58 –update-timestamp
60 Update timestamp of deleted objects to the current time. This
61 is the same behaviour as Osmosis.
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64 -h, –help
65 Show usage help.
66 -v, –verbose
68 Set verbose mode. The program will output information about
69 what it is doing to STDERR.
70 –progress
72 Show progress bar. Usually a progress bar is only displayed if
73 STDOUT and STDERR are detected to be TTY. With this option a
74 progress bar is always shown. Note that a progress bar will
75 never be shown when reading from STDIN or a pipe.
76 –no-progress
78 Do not show progress bar. Usually a progress bar is displayed
79 if STDOUT and STDERR are detected to be a TTY. With this option
80 the progress bar is suppressed. Note that a progress bar will
81 never be shown when reading from STDIN or a pipe.
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84 -F, –input-format=FORMAT
85 The format of the input file(s). Can be used to set the input
86 format if it can't be autodetected from the file name(s). This
87 will set the format for all input files, there is no way to set
88 the format for some input files only. See osmium-file-for‐
89 mats(5) or the libosmium manual for details.
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92 -f, –output-format=FORMAT
93 The format of the output file. Can be used to set the output
94 file format if it can't be autodetected from the output file
95 name. See osmium-file-formats(5) or the libosmium manual for
96 details.
97 –fsync Call fsync after writing the output file to force flushing buf‐
99 fers to disk.
100 –generator=NAME
102 The name and version of the program generating the output file.
103 It will be added to the header of the output file. Default is
104 “osmium/” and the version of osmium.
105 -o, –output=FILE
107 Name of the output file. Default is `-' (STDOUT).
108 -O, –overwrite
110 Allow an existing output file to be overwritten. Normally
111 osmium will refuse to write over an existing file.
112 –output-header=OPTION=VALUE
114 Add output header option. This command line option can be used
115 multiple times for different OPTIONs. See the libosmium manual
116 for a list of available header options.
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119 osmium derive-changes exits with exit code
120 0 if everything went alright,
122 1 if there was an error processing the data, or
124 2 if there was a problem with the command line arguments.
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128 osmium derive-changes doesn't keep a lot of data in memory.
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131 Find changes in Nepal extract in January 2016:
132 osmium derive-changes nepal-20160101.osm.pbf nepal-20160201.osm.pbf -o nepal-jan.osc.bz2
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136 · osmium(1), osmium-file-formats(5), osmium-apply-changes(1),
137 osmium-diff(1)
138 · Osmium website (https://osmcode.org/osmium-tool/)
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142 Copyright (C) 2013-2018 Jochen Topf <jochen@topf.org>.
143 License GPLv3+: GNU GPL version 3 or later
145 <https://gnu.org/licenses/gpl.html>. This is free software: you are
146 free to change and redistribute it. There is NO WARRANTY, to the
147 extent permitted by law.
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150 If you have any questions or want to report a bug, please go to
151 https://osmcode.org/contact.html
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154 Jochen Topf <jochen@topf.org>.
155 1.10.0 OSMIUM-DERIVE-CHANGES(1)