How and with what can (for a construction warehouse) create a high-precision (with an error of 10-20 cm) map on Android with 2D or 3D labels?

Question

satellite navigation

There is a monstrously huge construction warehouse, which the previous storekeeper stockpiled without any order. Due to the increase in the volume of work, it is impossible to put things in order in the warehouse for several months. Ordered to get out "how you want." There was an idea, somehow, with the help of new technologies that the 21st century gave us (GPS, Android, QR codes, barcodes, NFC / RFID tags, etc.) to streamline this mess. For example, on your day off, walk around the warehouse and being next to which storage units, using a GPS smartphone or any device that can be connected with a smart, mark where I am and what exactly is located here. Thus, temporarily creating a stock item base in the warehouse. Preferably fixing not only the "latitude and longitude" of my location, but also the height of the device at that moment (this is ideally). And as in the case of 2D, if this is POSSIBLE in 3D, the accuracy was maximum. The most allowed maximum is 100cm. So that later you can see where and what is, which I noted.
What exactly, what applications, what devices are suitable for this purpose? It would be absolutely gorgeous if these marks can then be viewed in some kind of Air application, through the smartphone’s camera.

Answer 1

Hire a warehouse manager who understands how inventory is organized. New technologies are good, but there is a wonderful rule in automation - automate chaos, get automated chaos. Therefore, first, in the same 1C or even Excel, organize the storage logic in the cells, and only then start automating - for example, placing beacons to automatically link the goods placed in the cells, etc.
GPS in this case is useless both because of the low positioning accuracy (about 5-15 meters for civilian use), and because of the impossibility of working near metal structures, or even more so indoors.
And yes, if you want to avoid manual inventory - do not even hope, any introduction of normal accounting will begin with walking around the entire warehouse yourself and manually rewriting what is where.

Answer 2

To determine the coordinates, some kind of "beacons" are needed. to connect with them. For example GPS - there the beacon is a satellite, but it will not work for you - the accuracy is too low. There are different systems like beacon or antilatency, built on bluetooth, wifi, optical/radio/ultrasonic tags - but you need a lot of them, and in case of a complex space configuration (warehouse) - it can work poorly. There are services like https://industrial.viewar.com/ where the "beacon" is the whole space. Perhaps this is closest to your option. But if things in the warehouse are constantly moved/added/disappeared, this can also work poorly (gradually reduce accuracy).

Answer 3

IMHO, the main device that is needed here is a sticker printer.
To number rows and racks, thus setting a coordinate grid in which it is realistic and easy to navigate. Without any GPS.
The third coordinate - the number of the shelf from the floor - a person will figure it out anyway.
And then go through with a smartphone and bring in "soaked plywood - 14083" (14th row, 8th rack, 3rd shelf)