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Geospatial Toolkit

IBM InfoSphere Streams 4.0

Samantha Chan

Team Lead, Streams Toolkits Team

For questions about this presentation contact: chanskw@ca.ibm.com

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Agenda

What’s New in Geospatial Toolkit

Demos

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What’s New?

4 new operators– Geofence

– Hangout

– SpatialGridIndex

– SpatialRouter

25 new functions– com.ibm.streams.geospatial.st

–

– com.ibm.streams.geospatial.ext• Useful functions for working with geohash, creating geometries in WKT and

utilities for working with geospatial data

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Geofence

Define one or more of geographic regions of interest.

As entities move in and out of the region, provide entry and exit

events.

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Smart Marketing Demo

https://developer.ibm.com/streamsdev/docs/geofence-smart-

marketing/

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Demo - Hangout

An operator to detect entities hanging out / dwelling in a region.

An entity is said to be in a hangout if:– The entity is staying in the same geographic area

– For a period of minimum dwell time

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Hanout Demo

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SpatialGridIndex

Define a bounding box of interest. The bounding box is divided into

columns and rows to optimize for speed and memory.

Port 0 – Entity Stream– Entities contained by the bounding box are stored in memory and tracked.

Port 1 - Query Stream– Allows you to send in query to find entities within a certain distance of the

query.

– Query geometry can be a point or a polygon

Output– Returns a list of entities within the specified distance from the query.

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SpatialGridIndex Green – Taxis (Entity)

Red – Person looking for taxi (Query)

Yellow – Taxis within 1 km of the query point

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SpatialRouter

The SpatialRouter operator is used to split an input stream that

contains geographical data into two or more output streams, based

on the geographic location specified by each tuple.

Allow us to easily parallelize and scale up processing of

geographical data.

Port 0 – input data split

N number of output ports

Guaranteed that entities with the same geohash will go to the same

port.

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Questions?