I'm new to learning GDAL (mapping in general). I have a bunch of tif files (300+) that are in NAD83, but my mapping application only uses WGS84. The tiles are all around 50-75Mb each
I'm able to use gdal warp to convert the projection properly to WGS84, but the images (tiles) come out skewed. I tried using bdalbuildvrt first to create the vrt, then gdalwarp with the following options: -co TILED=YES -co BIGTIFF=YES -of GTIFF -t_srs "+proj=longlat +datum=WGS84 + no_defs" input.vrt output.vrt Ok, so this mostly works, but I have 2 questions/issues: 1. what is the best way to convert the projection and eliminate the skewing? 2. The single .tif produced is now >30GB! significantly larger. why does this occur and how can I keep this file size down? Thanks for any info! Andrew Simpson
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