kanchanchy commented on code in PR #614: URL: https://github.com/apache/incubator-sedona/pull/614#discussion_r855804030
########## sql/src/main/scala/org/apache/spark/sql/sedona_sql/expressions/raster/Functions.scala: ########## @@ -771,3 +771,45 @@ case class RS_Normalize(inputExpressions: Seq[Expression]) } +/// Append the Normalized Difference between two bands to the image array data as a new band Review Comment: @jiayuasu In current GeoTiff Dataframe of Apache Sedona, each individual band is not a single column. There are two columns related bands: i) nBands abd ii) data. nBands denotes the number of bands in a Geotiff image, and data contains all bands in a single array. If there are 4 bands each of length 10, the size of data array is 40, where first 10 elements correspond to first band, second 10 elements correspond to 2nd band.... I maintained exactly the same structure of current raster dataframe in apache sedona. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
