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TexelTek - Andrew Levine - Hadoop World 2010
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TexelTek - Andrew Levine - Hadoop World 2010
1.
OPEN CLOUD CONSORTIUM IMAGE PROCESSING FOR DISASTER RELIEF Image Cache and Image Delta
2.
GOALS FOR PROCESSING MAP IMAGERY • Make imagery available for Disaster Relief workers over the web • Provide a mechanism for large scale image processing Satellite/Map Imagery •
Provide image deltas for temporally different and geospaJally idenJcal image sets
3.
• Source imagery can be very large – New image formats can be ~2G – Compare image sets easily • New data daily – NASA E01 mission tasking for fires and floods •
Pass over areas about every 3rd day • High availability for results HaiJ image: 18,878px by 34,782px TOOLS AND THE PROCESSING PLATFORM MOTIVATION FOR CLOUD IMPLEMENTATION
4.
USE CASES FOR THIS FRAMEWORK • Disasters – Fires – Floods – Earthquakes – DeforestaJon – Drought – War/Refugees – Tornados • Other Processing – Medical Imagery – Anomaly DetecJon – Full MoJon Video – Tracking – Digital Cinema
5.
TOOLS AND THE PROCESSING PLATFORM • OCCTestbed pla^orm – Resources for processing large data –
Testbed of mulJple clouds – UIC cloud is 32 nodes • Quad Core, 16GB RAM, GigE, HDFS on 256GB • Apache Hadoop: MapReduce and HBase – Algorithm adheres to MapReduce framework – hcp://hadoop.apache.org/ • OCC Image Processing tools (open source) – hcp://code.google.com/p/matsu‐project/ – Image comparison
6.
INTERFACING WITH RESULTS • Open GeospaJal ConsorJum Web Map Service – Images available through OGCWMS open specificaJon –
hcp://www.opengeospaJal.org/ • OCC WMS Servlet (open source) – hcp://code.google.com/p/matsu‐project/ • Various Map Viewing Tools – OpenLayers, Google Maps, others
7.
ARAL SEA 1989 AND 2008
8.
ZOOM LEVELS / BOUNDS Zoom Level 1: 4 images Zoom Level 2: 16 images Zoom Level 3: 64 images Zoom Level 4: 256 images
9.
Mapper Input Key: Bounding Box Mapper Input Value: Mapper Output Key: Bounding Box Mapper Output Value: Mapper resizes and/or cuts up the original image into pieces to output Bounding Boxes (minx = ‐135.0 miny = 45.0 maxx = ‐112.5 maxy = 67.5) Step 1: Input to Mapper Step 2: Processing in Mapper Step 3: Mapper Output Mapper Output Key: Bounding Box Mapper Output Value: Mapper Output Key: Bounding Box Mapper Output Value: Mapper Output Key: Bounding Box Mapper Output Value: Mapper Output Key: Bounding Box Mapper Output Value: Mapper Output Key: Bounding Box Mapper Output Value: Mapper Output Key: Bounding Box Mapper Output Value: Mapper Output Key: Bounding Box Mapper Output Value: Build Tile Cache in the Cloud ‐ Mapper
10.
Reducer Key Input: Bounding Box (minx = ‐45.0 miny = ‐2.8125 maxx = ‐43.59375 maxy = ‐2.109375) Reducer Value Input: Step 1: Input to Reducer … Step 2: Reducer Output Assemble Images based on bounding box • Output to HBase • Builds up Layers for WMS for various datasets Build Tile Cache in the Cloud ‐ Reducer
11.
Mapper Input Key: Bounding Box Mapper Input Value: Mapper Output Key: Bounding Box Mapper Output Value: Mapper resizes and/or cuts up the original image into pieces to output Bounding Boxes (minx = ‐135.0 miny = 45.0 maxx = ‐112.5 maxy = 67.5) Step 1: Input to Mapper Step 2: Processing in Mapper Step 3: Mapper Output Mapper Output Key: Bounding Box Mapper Output Value: Mapper Output Key: Bounding Box Mapper Output Value: Mapper Output Key: Bounding Box Mapper Output Value: Mapper Output Key: Bounding Box Mapper Output Value: Mapper Output Key: Bounding Box Mapper Output Value: Mapper Output Key: Bounding Box Mapper Output Value: Mapper Output Key: Bounding Box Mapper Output Value: + Timestamp + Timestamp + Timestamp + Timestamp + Timestamp + Timestamp + Timestamp + Timestamp + Timestamp Image Processing in the Cloud ‐ Mapper
12.
Reducer Key Input: Bounding Box (minx = ‐45.0 miny = ‐2.8125 maxx = ‐43.59375 maxy = ‐2.109375) Reducer Value Input: Step 1: Input to Reducer … … Step 2: Process difference in Reducer Assemble Images based on Jmestamps and compared Result is a delta of the two Images Step 3: Reducer Output All images go to different map layers set of images for display in WMS Timestamp 1 Set Timestamp 2 Set Delta Set Image Processing in the Cloud ‐ Reducer
13.
GULF OIL SPILL Day 115 Day 128 Delta
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SAMPLES / FLOODS IN PAKISTAN 2010 day 197 2010 day 263 Delta
15.
SAMPLES / FLOODS IN PAKISTAN 2010 day 197 2010 day 263 Delta
16.
HBASE TABLES • OGC WMS Query translates to HBase scheme – Layers, Styles, ProjecJon, Size • Table name: WMS Layer – Row ID: Bounding Box of image ‐Column Family: Style Name and ProjecJon ‐Column Qualifier: Width x Height ‐Value: Buffered Image