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Add ETL option to specify upper zoom limit for raster layer ingestion #1494
This PR addresses #1484 by adding an optional "maxZoom" argument to ETLConf (with a default value of 0), and modifies both the Etl and TileLayerMetadata classes to handle that option.
In testing with the Chattanooga demo however, setting maxZoom levels above 10 often led to the ingestion process being killed due to lack of memory. Increasing VM memory to 6 GB, and the memory available to the ingestion process to 4 GB, allowed the ingestion process to succeed up to zoom level 12.
This is looking good! Just added some more comments.
Before we merge these changes, you'll have to sign an Eclipse CLA. Can you sign one with an eclipse account tied to the same email address you commit to github with, and let me know when you have that? You can follow the right hand side instructions of here: https://www.eclipse.org/legal/CLA.php