0.6.1

• Added support for reading striped GeoTiffs (#64).
• Moved extension methods associated with querying tagged columns to DataFrameMethods for supporting
  temporal and spatial columns on non-RasterFrame DataFrames.
• GeoTIFF and GeoTrellis DataSources automatically initialize RasterFrames.
• Added RasterFrame.toMultibandRaster.
• Added utility for rendering multiband tile as RGB composite PNG.
• Added RasterFrame.withRFColumnRenamed to lessen boilerplate in maintaining RasterFrame type tag.

0.6.0

• Upgraded to Spark 2.2.1. Added VersionShims to allow for Spark 2.1.x backwards compatibility.
• Introduced separate rasterframes-datasource library for hosting sources from which to read RasterFrames.
• Implemented basic (but sufficient) temporal and spatial filter predicate push-down feature for the GeoTrellis layer datasource.
• Added Catalyst expressions specifically for spatial relations, allowing for some polymorphism over JTS types.
• Added a GeoTrellis Catalog DataSource for inspecting available layers and associated metadata at a URI
• Added GeoTrellis Layer DataSource for reading GeoTrellis layers from any SPI-registered GeoTrellis backend (which includes HDFS, S3, Accumulo, HBase, Cassandra, etc.).
• Ability to save a RasterFrame as a GeoTrellis layer to any SPI-registered GeoTrellis backends. Multi-column RasterFrames are written as Multiband tiles.
• Addd a GeoTiff DataSource for directly loading a (preferably Cloud Optimized) GeoTiff as a RasterFrame, each row containing tiles as they are internally organized.
• Fleshed out support for MultibandTile and TileFeature support in datasource.
• Added typeclass for specifying merge operations on TileFeature data payload.
• Added withTemporalComponent convenince method for creating appending a temporal key column with constant value.
• Breaking: Renamed withExtent to withBounds, and now returns a JTS Polygon.
• Added EnvelopeEncoder for encoding JTS Envelope type.
• Refactored build into separate core and docs, paving way for pyrasterframes polyglot module.
• Added utility extension method withPrefixedColumnNames to DataFrame.

0.5.12

• Added withSpatialIndex to introduce a column assigning a z-curve index value based on the tile's centroid in EPSG:4326.
• Added column-appending convenience methods: withExtent, withCenter, withCenterLatLng
• Documented example of creating a GeoTrellis layer from a RasterFrame.
• Added Spark 2.2.0 forward-compatibility
• Upgraded to GeoTrellis 1.2.0-RC2

0.5.11

• Significant performance improvement in explodeTiles (1-2 orders of magnitude). See #38
• Fixed bugs in NoData handling when converting to Double tiles.

0.5.10

• Upgraded to shapeless 2.3.2
• Fixed #36, #37

0.5.9

• Ported to sbt 1.0.3
• Added sbt-generated astraea.spark.rasterframes.RFBuildInfo
• Fixed bug in computing aggMean when one or more tiles are null
• Deprecated rfIinit in favor of SparkSession.withRasterFrames or SQLContext.withRasterFrames extension methods

0.5.8

• Upgraded to GeoTrellis 1.2.0-RC1
• Added REPLsent-based tour of RasterFrames
• Moved Giter8 template to separate repository s22s/raster-frames.g8 due to sbt limitations
• Updated Getting Started to reference new Giter8 repo
• Changed SQL function name rf_stats and rf_histogram to rf_aggStats and rf_aggHistogram
  for consistency with DataFrames API

0.5.7

• Created faster implementation of aggregate statistics.
• Fixed bug in deserialization of TileUDTs originating from ConstantTiles
• Fixed bug in serialization of NoDataFilter within SparkML pipeline
• Refactoring of UDF organization
• Various documentation tweaks and updates
• Added Giter8 template

0.5.6

• TileUDFs are encoded using directly into Catalyst--without Kryo--resulting in an insane
  decrease in serialization time for small tiles (int8, <= 128²), and pretty awesome speedup for
  all other cell types other than float32 (marginal slowing). While not measured, memory
  footprint is expected to have gone down.

0.5.5

• aggStats and tileMean functions rewritten to compute simple statistics directly rather than using StreamingHistogram.
• tileHistogramDouble and tileStatsDouble were replaced by tileHistogram and tileStats.
• Added tileSum, tileMin and tileMax functions.
• Added aggMean, aggDataCells and aggNoDataCells aggregate functions.
• Added localAggDataCells and localAggNoDataCells cell-local (tile generating) fuctions
• Added tileToArray and arrayToTile
• Overflow fix in LocalStatsAggregateFunction.