Welcome Robert.
Useful tools for one way to approach this Project:
- Polygon (in or outside the polygon (there is a tool to do determine if in or out of the polygon) and provides away to create / display the polygon on a map)
- LineString (display a trak showing where you have been) For example LineString to draw a track
- Map (display on a map all the above)
- Clock (keep track of time).
- LocationSensor (use with gps hardware)
- TinyDB (store/save coordinate results on the device)
Issues:
You can not with Blocks monitor continuously without a StayAwake routine or an extension. App Inventor apps do not run in the background natively. A partial solution for your app using an extension:
Another way: use http://geojson.io/ to build your polygon; import the polygon as a FeatureCollection.
and another way
A discussion from the original forum: https://groups.google.com/g/mitappinventortest/c/oywvDgBTjRE/m/sY0jZrT-CQAJ
Search the forum for many more examples for pieces of your proposed app.
Good luck.
Here are some resources to help you learn to use the AI2 tools. A very good way to learn App Inventor is to read the free Inventor's Manual here in the AI2 free online eBook http://www.appinventor.org/book2 ... the links are at the bottom of the Web page. The book 'teaches' users how to program with AI2 blocks.
There is a free programming course here http://www.appinventor.org/content/CourseInABox/Intro and the aia files for the projects in the book are here: http://www.appinventor.org/bookFiles
How to do a lot of basic things with App Inventor are described here: http://www.appinventor.org/content/howDoYou/eventHandling .
Also look here App inventor español. Offline. Tutorial. Ejemplos. Instalación. Códigos. Juegos. Curso gratis de App inventor. and here Tutorial Index | imagnity for more tutorials.
Learn about components Component Reference
and visit the Library The MIT App Inventor Library: Documentation & Support Help>Library on the MENU