tr option not working on MOD10A1.005 HDF 4 file.

[William Valencia]

I tried converting a MOD10A1.005 HDF 4 file to GeoTIFF with the -tr option. It basically hangs while giving me an always growing file. I had to kill the process. When I use -outsize it works without issue.

Using a MOD10CM.005 HDF 4 file, both options(tr and outsize) execute fast and give the proper results. Not sure if it is projection related. I am using gdal version 2.2.1

Here is the result of the outsize call: gdal_translate -co COMPRESS=DEFLATE -sds -of GTiff MOD10A1.A2005177.h12v12.005.2008204203950.hdf test.tif -outsize 1230 598

Input file size is 2400, 2400 0...10...20...30...40...50...60...70...80...90...100 - done. Input file size is 2400, 2400 0...10...20...30...40...50...60...70...80...90...100 - done. Input file size is 2400, 2400 0...10...20...30...40...50...60...70...80...90...100 - done. Input file size is 2400, 2400 0...10...20...30...40...50...60...70...80...90...100 - done.

Here is the result of the -tr call (had to terminate it) gdal_translate -co COMPRESS=DEFLATE -sds -of GTiff MOD10A1.A2005177.h12v12.005.2008204203950.hdf test.tif -tr 0.0167393593526468 0.0167224088988974

Input file size is 2400, 2400 0^C

Here is some info on the file(I chose a specific subdataset to show the projection info): gdalinfo HDF4_EOS:EOS_GRID:"MOD10A1.A2005177.h12v12.005.2008204203950.hdf":MOD_Grid_Snow_500m:Snow_Cover_Daily_Tile Driver: HDF4Image/HDF4 Dataset Files: MOD10A1.A2005177.h12v12.005.2008204203950.hdf Size is 2400, 2400 Coordinate System is: PROJCS["unnamed",

GEOGCS["Unknown datum based upon the custom spheroid",

DATUM["Not specified (based on custom spheroid)",

SPHEROID["Custom spheroid",6371007.181,0]],

PRIMEM["Greenwich",0], UNIT["degree",0.0174532925199433]],

PROJECTIONSinusoidal, PARAMETER["longitude_of_center",0], PARAMETER["false_easting",0], PARAMETER["false_northing",0], UNIT["Meter",1]]

Origin = (-6671703.117999999783933,-3335851.558999999891967) Pixel Size = (463.312716527916507,-463.312716527916677) Metadata: ... Corner Coordinates: Upper Left (-6671703.118,-3335851.559) ( 69d16'55.32"W, 30d 0' 0.00"S) Lower Left (-6671703.118,-4447802.079) ( 78d19'27.97"W, 40d 0' 0.00"S) Upper Right (-5559752.598,-3335851.559) ( 57d44' 6.10"W, 30d 0' 0.00"S) Lower Right (-5559752.598,-4447802.079) ( 65d16'13.31"W, 40d 0' 0.00"S) Center (-6115727.858,-3891826.819) ( 67d 8'33.37"W, 35d 0' 0.00"S) Band 1 Block=2400x416 Type=Byte, ColorInterp=Gray

Description = Snow cover extent by best observation of the day NoData Value=255 Unit Type: none

[William Valencia]

MOD10A1.005 HDF file