====== Web Based Resources ======

Web based resources are commonly used for online serving of GIS data, both for vector and image resources. \\
Orbit supports Web Map Services, Web Map Tile Services, Web Feature Services and Tile Map Services.

===== Web Map and Web Feature Services =====

Web Map Service (WMS), Web Map Tile Services (WMTS) and Web Feature Service (WFS) are the standard protocols of the [[http://www.opengeospatial.org/|Open Geospatial Consortium]] for serving, viewing or editing georeferenced map images  and geographical features over the the internet or Intranet using platform-independent calls.

A WMS, WMTS serves georeference map data only. A WFS returns both spatial features and attribute information. This makes it possible to use a WFS dataset for spatial analyses, attribute viewing and if allowed to edit and update the dataset.

More information : 
  * [[http://en.wikipedia.org/wiki/Web_Map_Service|Wikipedia Web Map Service]]
  * [[http://en.wikipedia.org/wiki/Web_Map_Tile_Service|Wikipedia Web Map Tile Service]]
  * [[http://en.wikipedia.org/wiki/Web_Feature_Service|Wikipedia Web Feature Service]]

=== Setup Connection ===

Orbit provides 2 options to connect and load a web service layer. We highly recommend the first option, using a file based connection :

**Web service resource connection file** \\
Filed based connection to one specific layer of a well defined web service.
  * [[193:technology:supported_formats:image:owxs|]].

**Resource Browser service connection** \\
Establish the Web service connection and add one ore more available web service resources. \\
This user interface method is useful for initial testing of a service and its resources.

{{orbitgis:how_to_find.png?25&nolink |}}
  * Orbit desktop : [[193:desktop:workspace:resource_library|Library]] > Web
  * Orbit EOS server : [[193:server:console:resources:datasets_setup|]]


=== Supported Versions ===

Orbit supports Web services as described by the OGC :
  * www.opengeospatial.org/standards/wms
  * www.opengeospatial.org/standards/wmts
  * www.opengeospatial.org/standards/wfs

Currently Orbit supports :
  * WMS versions 1.1.0, 1.1.1 and 1.3.0
  * WMTS version 1.0.0
  * WFS versions 1.1.0, the support of version 2.0 is on our wishlist. Let us know if you are interested. 

Remarks :
  * View only (WFS) \\ WFS support is limited to view only for both spatial and attribute component. \\ Editing or updating WFS features and styling is not supported. \\ Via a file based connection an Orbit legend can be defined. 
  * Supported object types (WFS) \\ Orbit's engine supports only the vector based variant of the following WFS Object types : \\ Point, MultiPoint, LineString, MultiLineString, Curve, MultiCurve, Surface, MultiSurface, Polygon, MultiPolygon
  * Internal resource name \\ No point "." characters allowed in web resource internal name. \\  Check the internal name via [[193:desktop:dataset:general|Dataset Properties > General > Dataset]] : <Orbit web service name>.<internal web service resource name> . \\ If the internal name contains one or more points then the resource cannot be used.

=== WebService CRS and Orbit Map CRS ===

The Orbit Map CRS will be used to define the Bounding Box of the GetMap WebService map request. To avoid issues like map  misalignment due coordinate transformations, set the Orbit Map CRS to a WebService supported coordinate system. \\
More information about Orbit Map and Dataset CRS, see [[193:technology:core:crs|]].

=== WebServices in Html5 WebViewer ===

Special configuration is required to use WMS and WMTS layers in Orbit's Html5 WebViewer, see [[193:technology:supported_formats:image:otm_for_wms|]].


===== Tiled Map Service =====

Orbit supports pyramid-based tile services as made popular by OpenStreetMap. \\

More information, see [[https://en.wikipedia.org/wiki/Tiled_web_map|Tiled web map]].

=== Setup Connection ===
web service resource connection file 

**Tiled map resource connection file** \\
Configure the tiled map service connection and the web resource to load, cfr web services (see above).
  * [[193:technology:supported_formats:image:otm|]]
===== SSL Security Certificates =====

When loading web resources via a secured https connection, the website's Security Certificate must be available to the Oracle's Java Runtime Engine used by Orbit. \\ 
More information, see [[193:technology:platforms:java_keystore|]].

===== Network connectivity =====

To use a Web based resource a successful connection to the providing server/service is required.  

If no network connection could be established, obviously Orbit will not be able to load the resource. Review the documentation below on how to check the connection from local network to web service.

If a network connection is successful, but Orbit can't load resource, most probably the Orbit application is not allowed to get online/network access due to an internal internet security application (e.g. aXsGUARD Gatekeeper from Vasco). The network and/or local computer administrator need to adjust your security settings or configure a proxy to be used by Orbit : 
  * Orbit desktop standalone : [[inhouse:orbit:config|]].
  * Orbit Server and Orbit desktop Client : [[193:server:eos:service|]].

=== Check Local network - Service connection ===

Check the connection from the local network to the online service by using "nslookup" or "ping" from the command line. 
If successful check firewall and security settings, see above. \\
In the example below a connection to the OpenStreetMap service is tested :

**Successful connection** \\

{{:technologies:resources:otm_test_successful.png?nolink|}}

**Failed connection** \\
{{:technologies:resources:otm_test_not_successful.png?nolink|}}