Записки программиста, обо всем и ни о чем. Но, наверное, больше профессионального.

2013-07-10

Geoprocessing bigdata

И еще один пример того, как, оказывается, несложно, даже легко, использовать распределенные вычисления (кластеры) для анализа и визуализации в ГИС.

At this year's DevSummit, we announced the GIS Tools for Hadoop project. Included in that project is a low level geometry java API which enables spatial operations in MapReduce jobs or the construction of higher level functions such as Hive User Defined Functions. However, this geometry library is not restricted to Hadoop MapReduce. It is used in Geo Event Processor, and can be used in Storm bolts or other parallel workflows. One such parallel workflow processing engine is Pervasive DataRush that I demoed at the DevSummit. Using the KNIME visual workflow, I was able to process 90 million records (BTW, small in the BigData world) in Hadoop File System, for heatmap visualization in ArcMap.


So to recap, you can store data into HDFS, or use the new GeoProcessing tools for Hadoop. Compose DataRush workflows with spatial operators that you export to be executed on a cluster from ArcMap, whose result is consumed back by ArcMap for further local GeoProcessing or visualization.
This is very cool!



Все просто — написать немножко кода на Java, реализующего промежуточные вычисления; в визуальном конструкторе составить workflow; купить кластер и наслаждаться скоростью.

original post http://vasnake.blogspot.com/2013/07/geoprocessing-bigdata.html

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