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OSM Inspector

OSM Inspector was created as a more or less general tool to show different views of OSM data in order to help advanced OSM users debug the data. It is meant to be used by users who understand the OSM data in some detail.

OSM Inspector shows different views for different subjects. Some views have data for the whole world, some only for Europe or other smaller areas. Areas where no data is available will be shown with a hatching pattern.

Changes in the OSM database typically need about a day or two to show up. You can see the date and time of when the data was current in the bottom left. Always check the raw data before you do anything drastic, somebody else might have changed something since!

See the OSM Inspector page on the OSM Wiki for more information.

Views and Base Layers

On the top of the screen you'll find the settings for the view and the base layers. The info button will take you to the wiki page with the documentation for this view. You can use the slider next to the base layer selection to change how faint or strong the base layer will appear.

The following base layers are available:

None:Just show plain white background
Mapnik:Usual OSM Mapnik layer
Public Transport:Public transport layer thanks to www.öpnvkarte.de

Overlays

On the left side of the screen you see the overlay layers available in this view. You can turn each layer on or off by clicking on the checkmark. Layers that don't appear in the current zoom level are shown in gray text. Zoom in or out to see them. If your mouse is over one of the layer names a popup box will appear, explaining what this layer is about.

The little icons show how layers appear on the map. Some layers have different renderings depending on the zoom level. Only one of those renderings is shown here.

If you click on a layer name it will be highlighted in red and only this layer will be shown on the map. Click on the name again to go back to showing all currently activated layers. Or you can click on another layer to switch to that one.

Layer Details Popup

If your mouse is over one of the layer names a popup box will appear, explaining what this layer is about.

It also tells you about the data source for this layer and the zoom level in which this data is shown. If the layer has labels, you'll see what the label is showing and in what zoom levels it appears. If a layer is noted as beeing "queryable" it means you can click on a feature of this type on the map and it will query this layer.

Several data sources are used, see the view descriptions for details.

The Map

The map shows the chosen base layer and all chosen overlay layers. You can use it as usual (point-and-drag for scrolling, shift-drag to zoom in, ...).

If you click on any feature on the map, more information about this feature will appear in the selection area. Only layers that are active and queryable will be queried.

Above the map you'll see two icons:

Open Potlatch in a new window with the current map view.
Tell a running JOSM to zoom to the current view and load the data. If you want to use this feature you have to install the JOSM RemoteControl Plugin and start JOSM first.

Selection Area

In the selection area in the top right corner some data about a selected feature is shown.

Above the data you'll see the following icons:

Zoom to this feature.
Open Potlatch in a new window with the view centered on this feature and the feature selected.
Tell a running JOSM to zoom to the selected feature and select it. If you want to use this feature you have to install the JOSM RemoteControl Plugin and start JOSM first.
Open this object in the OSM data browser.

Data Area

The data area allows you to see the data from one of the layers. You can choose which one. At most 100 features will be listed.

Permalink

The permalink gives you a link to the current page including all settings. The parameters are as follows:

view:View ('addresses', 'geometry', ...)
baselayer:Base layer ('None', 'Mapnik', ...). Defaults to 'Mapnik'.
opacity:Opacity of base layer (between 0 and 1). Defaults to 0.3.
lon:Longitude of map center
lat:Latitude of map center
zoom:Zoom level
mlon:Longitude of optional marker
mlat:Latitude of optional marker
overlays:List of overlay layers. If not given, all layers are shown.

The is currently no way to set the marker position interactively, but you can still link to the page with the marker parameters (mlon and mlat) included and the marker will show up on the map.