[Patch] Create expert Overpass download plugin

[joshdoe]

The mirrored_download provides basic downloading from the Overpass API, but it doesn't expose the full power of the API. The plugin should at least provide for entry of a XML or Overpass QL query, and potentially have a simple GUI for choosing common queries. Bounding box and current selection can be variables to be used within the query.

[simon04]

Work in progress (see second line of screenshot):

To be done:

• keep history of queries
• validate query (by simple regexp)
• maybe: more helpful error message (than: "Failed to download data. Its format is either unsupported, ill-formed, and/or inconsistent. Details (untranslated): Line 1 column 1: Content is not allowed in prolog.")

[joshdoe]

Great! Can the query box be expanded for more complex queries, in both XML and QL?

[simon04]

Replying to joshdoe:

Great! Can the query box be expanded for more complex queries, in both XML and QL?

I guess so. I suggest to add XML query support in a next step.

[simon04]

In 5097/josm:

see #7511 - make DownloadDialog, Osm download related classes more adaptable

[simon04]

Added selection of object type, (simple) validation of query input, renamed to XAPI query.

[simon04]

Committed above state in o28108/o28109.

[AM909]

Even just the ability to specify a raw QL query with lat/lon (%B, %L, %T, %R) substitution would be most helpful, like:

Server part: "​http://overpass-api.de/api/interpreter?data="

QL part: "node(%B,%L,%T,%R);out meta;"

It would be useful if the server specification were moved to the download dialog, since one would have to change it to switch back and forth between the current XAPI syntax (with auto bbox parameter) and the raw QL syntax.

[skyper]

Two enhancements:

1. It would be nice to include an option to download objects by ids or have an option to choose the server in the core function.
2. If you select a BBox and then enter some xapi option the red warning at the bottom right is still shown which is irritating. Maybe some more general warning would make sense.

Thanks

[simon04]

Draft:

• Server URL also in download dialog
• The following place holders are substituted in server URL and query:
  • {type}
  • {xapi_bbox}
  • {overpass_bbox}
  • {minlon}
  • {minlat}
  • {maxlon}
  • {maxlat}
• Size warning in lower right corner hidden

[skyper]

Thanks for the improvements.

Are there plans to replace the main download dialogue ?

Replying to skyper:

Two enhancements:

1. It would be nice to include an option to download objects by ids or have an option to choose the server in the core function.

Thanks for the server option.
I propably did not explain well but what I meant was adding a server option to the Download object dialogue.

Cheers

[simon04]

7511b.patch​ is the patch related to the above screenshot.

[anonymous]

when this plugin will be live ?

[simon04]

This is obsolete now due to #11428.