omconvert

What is omm?

omm is a special file format for OSM data, with '>'s and '<'s and '='s as the delimiters. This is kind of like csv file format.

It follows the following schema:

First part -- Basic Attributes:

[type]>[id]>[visible]>[version]>[changeset]>[user]>[uid]>

Where:

type: type of object represented in integer value.

           0 for node
           
           1 for way
           
           2 for relation

visibility: whether the object is deleted or not.

             0 for false
             
             1 for true

Second part -- Coordinates/Nodes/Members of object

For nodes:

[Lat]<[Lon]>

For ways:

[nd ref]<[nd ref]<[nd ref]...<[nd ref]>

For relations:

[member type]=[member id]=[member role]<[member type]=[member id]=[member role]<[member type]=[member id]=[member role]<...<[member type]=[member id]=[member role]>

Third part -- tagging

[tag key]=[tag value]<[tag key]=[tag value]<...<[tag key]=[tag value]

What is omc?

omc is a changeset version of omm. It is derived from omm, with minor modifications.

To denote modification acrion, a number with a colon is used.

For example, denoting would be 3:

                                     <modify> would be 4:
                                     
                                     <delete> would be 5:

Why omm and omc

It strikes a balance between compressed form and xml form.

Compared to osm & osc

• Compact ( around ⅓ of the size )

Compared to o5m & o5c & obf

• Human readable

• High compression ratio through different methods

How to install

Prerequisites: python 3 interpreter with standard library

No building is required. Just move the python scripts to your destination folder and ypu can run!

License

It is released under the GNU LGPLv3 license.