New to GDAL, have some tiff files and I'm trying to do the following:
"0 to NoData" to avoid black background in Mapbox:
gdalwarp -dstnodata 0 -dstalpha [input file] [output file]
The problem is, the output file size for this tasks is huge (≈150MB to ≈10GB).
The same thing occurs when I next add a color relief:
gdaldem color-relief -of GTiff [input file] [color text file] [output file] -alpha
The file size roughly doubles...
My only guess is that the data is remaining as a value and is somehow being interpreted as such, so my only option is to compress the file using LZW afterwards. However, this process takes a ridiculously long time to complete, so I'd like to find a more efficient way. I typically don't see such great file inflation, but this dataset is new to me.
EDIT:
Here is the gdalinfo readout...
Driver: GTiff/GeoTIFF
Files: [input file]
Size is 129753, 78920
Coordinate System is:
PROJCS["NAD_1983_Albers",
GEOGCS["NAD83",
DATUM["North_American_Datum_1983",
SPHEROID["GRS 1980",6378137,298.2572221010042,
AUTHORITY["EPSG","7019"]],
AUTHORITY["EPSG","6269"]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433],
AUTHORITY["EPSG","4269"]],
PROJECTION["Albers_Conic_Equal_Area"],
PARAMETER["standard_parallel_1",29.5],
PARAMETER["standard_parallel_2",45.5],
PARAMETER["latitude_of_center",23],
PARAMETER["longitude_of_center",-96],
PARAMETER["false_easting",0],
PARAMETER["false_northing",0],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]]]
Origin = (-2353941.226999999955297,3160112.077999999746680)
Pixel Size = (30.000000000000000,-30.000000000000000)
Metadata:
AREA_OR_POINT=Area
DataType=Generic
Image Structure Metadata:
COMPRESSION=LZW
INTERLEAVE=BAND
Corner Coordinates:
Upper Left (-2353941.227, 3160112.078) (127d48'20.50"W, 47d51'28.35"N)
Lower Left (-2353941.227, 792512.078) (119d57'48.72"W, 27d30'44.36"N)
Upper Right ( 1538648.773, 3160112.078) ( 74d45'30.86"W, 49d54'18.35"N)
Lower Right ( 1538648.773, 792512.078) ( 80d 8'39.87"W, 29d 2'53.17"N)
Center ( -407646.227, 1976312.078) (100d52' 1.48"W, 40d42'15.31"N)
Band 1 Block=128x128 Type=Byte, ColorInterp=Gray
NoData Value=0
Metadata:
RepresentationType=THEMATIC
Image Structure Metadata:
NBITS=2