I am trying to convert a Geotiff from WGS84 to UTM17. In QGIS, there seems to be a super easy way to do this:
First, I input my tiff by clicking add raster layer. This works successfully, as I can see my image on the screen and if I move my mouse of the screen it tells me the GPS coordinates in lat long for every point.
Next, I click save as, and save it as a geotiff with the coordinate system changed to UTM. This appears to work, but it takes pretty long so I have a couple questions.
Originally, the files are about 250mb. When I convert them to another coordinate system, it becomes like 2GB?? Why is it becoming so massive? I would think they should be of similar size.
It takes about 15 min to convert the file while the "save as raster" screen continues. I tried compressing them as JPEG, but that didn't seem to speed things up. I know this is long because I was converting .las point cloud from wgs to utm in Python and it only takes about a minute for the same size.
Am I doing something wrong?
AndreJ's answer is what I was looking for. This is the correct way to change the files. The file size remains the same and it processed 600mb in about 3 minutes.