For example in agriculture: a farmer might want to have multiple sensors (e.g. soil temperature, soil moisture etc.) on his 100+ acre farm (typical in the Netherlands, often much larger in the US, Canada, Rusia etc.). It would be nice to grab a bunch of sensors and plant them at convenient locations and not having to bother too much about keeping track of where exactly the sensors are planted: simply scan each sensor's RFID tag (or QR-code) when it is planted and the scanning app will record the sensor-ID and location. This information can be used in the backend to show the location of each sensor.
In such a use case there is typically only 1 or maybe 2 gateways in the neighborhood. And we should stop with the 3 point thing anyhow I'm told 
(although I'm still very interested in the real gelocation capabilities of a typical LoraWAN network).
Note that such sensors typically are removed during planting / sowing and harvesting, so they might often change from location.