I've got a large number of raster tile and would like to create a list that shows how many have a certain nodata value, for example, how many have a nodata value of o, how many have a nodata value of -39 to -1 and how many have a nodata value of <= -40. What would be the best way to do this?
I've tried a few different methods but so far have only ended up with empty csv files.
Thanks.
+19Hi @jamesclarke,
The RasterBandPropertyExtractor transformer will give you the NoData values for each band, in the list _band{}.band_nodata. You can use ListSearcher transformers to separate the rasters by NoData value.
Hi @jamesclarke,
The RasterBandPropertyExtractor transformer will give you the NoData values for each band, in the list _band{}.band_nodata. You can use ListSearcher transformers to separate the rasters by NoData value.
+41
Could you share us your Workspace template? (.FMWT )
Thanks,
Danilo
+28Because most data formats do not understand fme lists.
Assuming you list is in the format _list{}.value, _list{}.count, try using a ListExploder just prior to the CSV writer, and set the attributes on the csv to value and count.
To get your your data into that format, use the RasterBandPropertyExtractor as @DaveAtSafe suggests, and follow that by the StatisticaCalculator with ComputeHistograms selected.
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