Options: Reprojection
In reproject mode, Sanchez reprojects geostationary IR images into plate carrée projection. See Reprojection modes for details of the different reprojection options.
In this mode, the following additional options are available:
All modes support optional auto-cropping (-a / --autocrop) to crop target images to a tight rectangle. This option loses some source imagery, but maximises the total area.
The example below is without and with autocrop enabled:
When rendering a single image with no underlay and a .png output file is specified, the image is rendered on a transparent background.
If you already have a full colour composite, use the -U / --nounderlay mode combined with -L / --noadjustlevels to create an image which has no colour correction or underlay applied.
The following example also preserves the original 2km spatial resolution (5424x5424px image) by using the -r 2 flag.
sanchez reproject -s C:\images\goes17\fd\fc\2020-09-12\GOES17_FD_FC_20200912T210031Z.jpg -o output.jpg -ULa -r 2