Historical Objects/Other functions

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Available languages — Historical Objects/Other functions
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Other features


The map can show several base layers:

In the lower right corner a navigation rectangle can be activated. It enables fast panning of the map through a red rectangle mouse cursor.


Search is realised using Nominatim, information on usage including examples are documented here: Nominatim.

Additional functionality: It is possible to search for OpenStreetMap Objects by prefix characters n Node, w Way, r Relation. Example: Entry of "r551400" in the search field leads to position lat=50.83344&lon=6.88121. There is the location of the corresponding item.

Detail switch


Display of historical objects depends on the zoom level. This ensures not being overthrown by the sheer number of objects in lower zoom levels. Display starts with zoom level 5 (least objects) and it ends with zoom level 18 where all available objects are shown. An addtional ruler at the left side of the map window allows for showing less or more objects at the respective zoom level. The number corresponds to the level on which display will be based: Being in zoom level 9 and selecting +1 means: show all objects that normally would be shown in zoom level 10 (more details visible).
The number of displayed objects is limited to 250 in order to avoid browser overload when using the detail switch. Objects are drawn from left to right, so missing objects at the right side of the map may be an indicator of limitation.


allow download of all objects without image=* tag from the actual window to a GPX file.
Edit with JOSM
the actual window will be opened in the editor JOSM, the JosmRemoteControl plugin needs to be activated. This link is visible from zoom level 12 upwards.
Edit with Potlatch2
the actual window will be opened in the online editor Potlatch 2. This link is visible from zoom level 14 upwards.
Edit with iD
the actual window will be opened in the online editor iD. This link is visible from zoom level 14 upwards.


Map symbol geotargeting

The button "Zoom to current position" pans and zooms the window to the current position. The position is determined by the Wikipedia-16px.png Geolocation API defined by W3C. The found geographical position will be centred in zoom level 14. Usually the browser will ask the user for permission to access the relevant services. See also Wikipedia-16px.png Geotargeting on Wikipedia.


The legend can be shown via the button "Legend and information".

  • Time/date of last database export
  • List of all symbols, sorted ascending, grouped by zoom level. The symbols are linked to the corresponding documentation.
  • Number of database objects of particular type
  • Information and contact
  • Acknowledgements

Another click on the button "Legend and information" closes the menu.


The map can show the Direction of an object. It is mapped as seen "from the object". The direction of an adit for example is the direction out of the adit.
The following objects are mapped in a direction sensitive way:

dependent of resource=*
dependent of direction=*
For man_made=adit the old symbols, dependent from the resource=* tag) are shown up to zoom 14. From zoom 15 a new symbol is displayed in the respective direction, provided that a direction tag is present.
dependent of direction=* (in the popup)

For all other objects with direction=*, the direction is shown by a symbol in the popup.



The switch "Compass on/off" enables/disables a compass rose. It could help in finding directions.