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Live Geoinformation with Standardized Geoprocessing Services
6.
Research @
Integration of Geodata
and Processes
Live
Geoinformation
Origin of Communication
Geodata of Geodata
7.
Web Service interaction
Current
Desired
Improved user experience
Improved performance & scalability
8.
Web Processing Service (WPS)
Data Information
WPS
Process 1
GetCapabilities Process 2
DescribeProcess Process n
Execute
9.
Requirements
• Progressive transfer
• Handling, processing, creating of geodata
streams
• Loss-less encoding and transfer of geodata
• Interoperability & portability
10.
Approach
• Asynchronous communication
• Input/output as reference
• Start processing immediately after receiving
the first piece of data
• HTTP Live Streaming
11.
HTTP Live Streaming
• HTTP-based Media Streaming Protocol
• Sequence of small HTTP-based file downloads
• M3U playlist containing media chunk or sub-
streams
14.
Tweaks
• Example playlist endpoint
– http://host:port/wps/playlist?id=123&pol
lingRate=10
• Polling rate
• Update of playlist
– New items
– Remove retrieved items
15.
Use case
• Generalization
– Simplifying street geometries
• Data
– OpenStreetMap
– Available in playlist format
• Implementation
– 52°North WPS – pluggable & extensible
– GWT Client
24.
Outlook
• Enhance other services with HTTP Live
Streaming
– Data and sensor services
– Workflows & scheduling
• Extend to other use cases
– Live analysis of plane tracks (ADS-B) & ship tracks
(AIS)
25.
Conclusions
• Live Geoinformation
– Data information
– Streaming
– HTTP Live Streaming
• Improved performance & scalability
• Improved user experience
• Processing of potentially unlimited streams of
sensor data
• Relevant for other service types
26.
Thanks for your attention!
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