Introduction

A known point (or stored location) is simply a geographic point (latitude/longitude, and optionally with name/elevation/datum) that can be used for various operations in the Flex app and hardware.

Supported Operations

The Bad Elf Flex app supports the following operations with known points:

• Import or export a CSV file containing known points.
• Import a single known point via URL.
• Browse/create/edit/delete stored locations.
• Create stored location from current position being reported by the Flex receiver.
• Guide to a known point (shows range and bearing, with compass/track/north up orientation).
• Use known point as the reference point when setting up a Flex for base mode.
• Use known point(s) as the control point(s) for laser offset workflows.

The Bad Elf Flex hardware also supports a limited set of standalone operations with known points:

• Import a known-points.csv file from the root folder of a USB drive connected via the USB-OTG adapter.
• Use known point as the reference point when setting up a Flex for base mode.

CSV File Format for Known Points

The CSV should contain one or more known points, with one per line:

Sample:

Guidelines:

• Name (optional): avoid punctuation
• Latitude: decimal degrees N. use - for S. eg 35.6789
• Longitude: decimal degrees E. use - for W. eg -115.6789
• Altitude (optional): in meters
• Datum (optional): one of:
  • WGS84_4326 
  • ITRF2000_8997 
  • ITRF2008_8999 
  • ITRF2008_8999 
  • ITRF2014_9000 
  • NAD83(2011)_6318