Please swap out this image:
https://xalgorithms.org/writing-images/gis.jpg

With the image I attach here.

This image occurs in three sizes:

1. on the home page (near the bottom)
2. in the drop-down box from the "Use Cases" item of the navigator
3. in the mouse-over of a browser tab where the Xalgorithms website is loaded ... I think that's all.

I don't mind if you change the name of my new image to "gis.jpg" to avoid having to revise the pointers -- you can just swap the image itself in the folder.