You’re asking a good question, because finding a map program with reliable data on dirt tanks, springs, and smaller water sources isn’t always straightforward. A lot of folks use topo tools like USGS Topoview or Gaia GPS on desktop, since they let you pull coordinates manually for older GPS units. I agree with your approach — getting the raw coordinates yourself is usually the most accurate way. And it’s also true that custom solutions for your business needs – off-the-shelf software rarely covers 100% of your workflows, which is why some people eventually look for
https://lemon.io/hire/back-end-developers/ back-end developers for hire when they want a fully tailored mapping tool that matches their requirements.