NOAA radar overlaid on a part of NASA's Blue Marble image of the southeast US.
The gdal set of GIS utilities is nothing new, and they are even incorporated into other GIS programs. But that does not mean that everyone who will ever need to master them has already done so, and it does not mean that mastering them is simple. It’s not really difficult to start using utlities like gdalwarp directly, but there are details that keep it from being really simple. This article is part of my notes to myself as I try to learn some of this.
I wrote an article about using gdalwarp to perform a pair of standard projections from a rectilinear view of the Earth using a Blue Marble image from NASA’s Earth Observatory. Below I discuss using a custom projection to do something marginally useful — combining the Blue Marble with some NOAA weather imagery.
Below are the steps that went into making that image. Note that I work in Linux, but Windows and likely Mac versions of these tools exist.
