Laser Offset Workflow: Checklist
Modified on: Fri, 21 Jan, 2022 at 6:27 PM
The process depicted below guides you through our checklist workflow to assist you through each step of a successful Laser Offset data collection process.
Once your rangefinder is calibrated and connected (see Bad Elf Flex Configuration) and your Bad Elf Flex is connected to your mobile device, select “Laser Rangefinder” from the left side menu.
Tap “Settings” under “Laser Rangefinder”.
Most recently acquired target
Closest target acquired while “Fire” button was held down
Farthest target acquired while “Fire” button was held down
Filter (Requires Foliage Filter Accessory) that only detects pulses returned from Reflector
Custom magnetic declination
Include rangefinder errors in metadata, or exclusively use GNSS accuracy
Test fire your laser using the “Fire Laser” blue button at the bottom of your screen to ensure the “Last reading” directly above the button displays a valid value.
Check if your hardware is connected.
Check your pole and laser heights (meters) by tapping the heights.
Tap the blue arrows on the right if you need to change the height values.
Verify the orthometric height model for elevation values.
Set the Laser Offset Collection Method. If the laser has an internal compass, choose Range-Azimuth, otherwise, select Range-Range. Note: Range-Azimuth calculates the position of an offset feature using the azimuth reading from the compass, the inclination of the tilt sensor, and the recorded distance from the laser sensor. The Range-Range method does not require a compass reading, it instead requires two control points and two laser shots to triangulate the offset location.
Select “Auto-Capture Target Height” if you need to capture the height of every target.
Capture Control Point
Capturing a control point provides accurate location information so the app can calculate the position of the offset target using the measurements recorded by the rangefinder.
Ensure the Bad Elf Flex is oriented as vertical as possible and has obtained a GNSS fix.
Tap the “Capture” blue button and wait five seconds to record the control point.
Your Bad Elf Flex will beep twice at both beginning and end of point collection.
Aim and fire the laser using the button on the rangefinder or the blue button in the app.
Note: If you turned on “Auto-Capture Target Height” under the laser offset collection method settings, capture the height immediately after shooting the base and skip step 3.
Tap the arrows next to “ht:” if capturing a height for that target.
Fire the laser at the top of the target.
Continue for all targets, then tap “No more targets” at the bottom right.
If Using Range-Range:
Proceed to “Capture Control Point #2”.
Make sure all targets lie on the same side of the path you take from the first control point to the second control point.
Control Point #2 must be at least 20-30 feet away from the first point for improved triangulation.
Tap once you’ve moved, then specify if the targets were on your left or right as you moved to the second control point.
Repeat shooting the targets in the same order for control point #2 as performed for control point #1.
Tap “Log x Points”.
Choose “Collect more” or “done collecting”.
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