A New Blog Post on Big Data Aggregation

[SarahAmbrose]

The Big Data team has created a new tutorial on aggregating your big data using GIS tools for Hadoop. You can read the blog post here.

Aggregation is a powerful technique for visualizing your big data, so be sure to check it out!!

[SarahAmbrose]

If the link isn't working try this:
New Spatial Aggregation Tutorial for GIS Tools for Hadoop | ArcGIS Blog

[RicardoBarros_Lourenco]

Good approach Sarah!

Any news on raster processing?

Cheers,

Ricardo

[SarahAmbrose]

Hi Ricardo - we aren't currently adding raster capabilities to the GIS Tools for Hadoop, but aren't ruling it out either. What kind on analyses are you looking to complete?

-Sarah

[RicardoBarros_Lourenco]

I'm interested on calculating NDVI from Landsat images stored on Amazon S3. I've recently accessed a website from ESRI that is calculating NDVI, even with a time series of it (Unlock Earth's Secrets | Esri Landsat ). Do you know how this data is being processed? Does it uses hadoop to do so?

Cheers,

Ricardo

[JieZhang]

Hi Richardo,

I can help Sarah Ambrose​SAmbrose-esristaff answer this question. The NDVI processing is implemented using a feature called raster function. The back-end of the image shown in the map is a image service with a series of raster functions - including NDVI - defined. The raster functions are the definitions of processing, when you select the option to apply the NDVI function, the image service returns the on-the-flying processed pixels. This process does not use hadoop.

You can checkout this blog to learn more about raster function on image service. Changing the display of image services dynamically in a Web API | ArcGIS Blog