--- a/MakeWaypoints.kt	Wed Aug 25 00:24:30 2021 -0700
+++ b/MakeWaypoints.kt	Wed Aug 25 06:33:31 2021 -0700
@@ -2,7 +2,7 @@
  * Make waypoints. In Kotlin, because the JVM has a uniquely non-sucky
  * way to write XML.
  */
- 
+
 import javax.xml.stream.*
 import java.io.FileOutputStream
 
@@ -14,10 +14,10 @@
         System.err.println("${MYNAME}: expecting a single file name")
         System.exit(2)
     }
-    
+
     println("Enter waypoints below, end with empty line.")
     println()
-    
+
     val outName = args[0]
     val invalid = "${MYNAME}: invalid entry, please try again"
     FileOutputStream(outName).use stream@{
@@ -27,7 +27,7 @@
             writeAttribute("creator", "MakeWaypoints")
             writeAttribute("version", "1.1")
             writeDefaultNamespace("http://www.topografix.com/GPX/1/1")
-            
+
             while (true) {
                 print("Longitude, latitude: ")
                 val longLat = readLine()
@@ -64,5 +64,3 @@
         }
     }
 }
-                
-        
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gdalwarp.txt	Wed Aug 25 06:33:31 2021 -0700
@@ -0,0 +1,8 @@
+Gdalwarp is something of a pain. I got decent results with:
+
+gdalwarp -r lanczos -srcnodata None -dstnodata None -multi -tr 1 1 WA_Hamilton_20200305_TM_geo.tiff WA_Twin_Sisters_Mountain_20200323_TM_geo.tiff both.tiff
+
+Note that this changed the resolution (roughly doubled it, in fact).
+There does not seem to be a good, easy way to tell it to preserve
+resolution.  You must play with -tr. Anything higher than 1x1 is nasty
+and coarse. Anything less gobbles disk space exponentially.