I have used the Strip Map Index Features tool to create an Index Layer for Data Driven Pages. The problem is with the page numbering that the tool creates. Some of the page numbers are in order, but others seem random. Here is the tool as I ran it:
Here is the result I got:
How can I modify the tool so that the page numbers are in some order? My preferred order would be along individual polylines from West to East and North to South.
With that network of lines, there's no way for ArcGIS to figure out which page you'd like to be "first". The strip map tool is meant to create a mapbook along one line feature, it doesn't do so well with more than one, especially if they crisscross each other like yours do.
However, it does look like it covered all of your lines with mapbook pages, and they're oriented more or less correctly. In your situation, I'd just edit the index layer and re-number the pages however you want them to be ordered. I would also remove some of the pages, when you have overlapping lines and you use the Strip Map tool, you can get unnecessary pages where your lines meet, because the tool is generating a complete map set for each line feature individually. Pages 24 and 48 in your screenshot, for example, seem to be redundant.
If you want to be able to generate the pages automatically, you will probably have better luck using the Grid Index Features tool instead.
