59. OGC
®
GeoSynchronization Service (GSS)
Replication
Channel
Change
Channel
Resolution
Channel
GSS in Action
Collector
Submits
Change
Request
1 5
Collector
notified of
disposition
of proposed
change(s)
2
Reviewer is
notified
of pending
Change
proposals
3
Reviewer
Approves or
Rejects the
proposed
changes
4
Approved changes are
applied to features via
OGC WFS-T
OGC WFS-T OGC WFS-T
Geographic
features
accessible via
WFS
OGC WFS-T
6
GSS notifies
Subscribers of
changes to
features (i.e.
Transactions)
Collector Reviewer Subscribe
r
Also known as
a “Data
Publisher” or
“The Crowd”
Collector reads features
from a WFS and proposes
changes to those features.
This may include proposing
creation of new features.
59
slide by
Peter Vretanos
In this section of the demonstration we’re going to show the use of GeoSynchronization Services.
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GeoSynchronization Services allow enterprises to receive real-time geospatial updates published by many users and sources, review them, and then insert those updates to web feature services operated by many organizations in many different locations.
Three roles will be highlighted – Publishers, Reviewers and Followers
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The first step in GeoSynchronization is to read features from WFS managed by the GeoSynchronization Services and proposed changes to those features.
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The Publisher role will use Gaia from The Carbon Project and also web clients to make changes to geospatial features - and then submit change requests to the GeoSynchronization Services. These proposed changes are entered into the ‘Change Feed’
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A Reviewer, perhaps in a separate location, is notified of the pending Changes – and then Accepts or Rejects those changes.
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If accepted, the Approved changes are applied to various feature layers using the OGC WFS-T interface.
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The GSS Resolution feed will also notify the Publisher as to whether their proposed changes were accepted or rejected.
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The GSS also notifies Followers of changes to feature layers using the Replication feed.