LandMark - (n) an object or feature of a landscape or town that is easily recognized from a distance, especially one that enables someone to establish their location.

Synonyms: Marker, mark, beacon, cairn.

In context this is a single object that can be sensed (eyes, ears, nose, mouth, touch).  Examples: scent of a coffee shop, sound of an escalator, echo of a large room.

iBeacon

• A low energy Bluetooth device that broadcasts (advertises) an outbound radio signal constantly.
• Always expressed using CamelCase.
• Typically powered by replaceable batteries.  

Synonyms: iBeacon, Beacon, Bluetooth Beacon

BPS- acronym.  A collective reference to network of one or iBeacons.

Uses:

• A BlindSquare BPS
• Using your BPS
• Information from your BPS
• With your BPS enabled iPhone...

the asymmetric area representing the range of a single of a bluetooth Beacon.

<plural> the asymmetric area representing the range of multiple bluetooth Beacons, whether abutting, overlapping or including. Beacon Clouds exist within a BPS.

The information that is transmitted radio from a Bluetooth Beacon within its beacon cloud.

Almost all existing beacons are using non-connectable, indirect advertising. This means that the beacon is not collecting the information. However, once the beacon triggers a data request to the cloud servers (most likely with beacon info), the server could still log the information. The privacy protection for the customer should focus more on the app side than that on the beacon itself.

Elements that will absorb or cause the reflection of a Bluetooth radio advertisement.

Examples:  "Radio is a very unpredictable beast. All sorts of things can affect signal strength. Different materials can have different radio absorption or reflection properties. (One RFID project I worked on had tags on pallets of Soda bottles so they could track their movement out of the warehouse. The company decided to change the color of the plastic pallets from red to black, and the whole system stopped working as the black dye acted as a radio absorber). Bottom line, some walls and materials will block signals to some extent, while others will be completely opaque.

Then you've got radio reflections. Materials reflect radio signals, and radio signals are waves. Depending on where the reflection takes place (and the wavelength of the radio wave, the same signal could encounter another version of it self. If the intersection happens when they are in phase (both at the peak at the wave at the same time) then the waves will add together. If it occurs out of phase (peaks opposite) then they can cancel each other out. This means that a specific wavelength could have a hot spot in one location and a dead zone a couple of feet away. Shift wavelengths slightly and the zones move (which is why clever routers use frequency hopping to get optimal signal)."

Obstacles will decrease the signal range of a beacon. The figure above is an artist interpretation of the idea that not all signal ranges will be spherical due to obstacles. As a consequence, the precision of distance estimations will vary.

A digitally created LandMark to provide a reference place where there is no traditional LandMarks available. A virtual LandMark can be defined outdoor by using Global Positioning Systems (GPS), indoors with BlindSquare Beacon Positioning System (BPS) with Beacon Clouds.

In the illustration above the element 3, and the color green, represents the convergence of two beacon clouds.  Element 3, with BlindSquare, can be defined as a Virtual Beacon.

<singular or plural>, the path formed by the continuous connection of Virtual LandMarks creating a connection between a current position and an intended destination.

In a singular form, a path.  Plural, a network of interconnected paths.