Processing image data

Map Area

Top Toolbar

Project

Summary

Local

Processing

panel

Layers

Step 1: select 1. Initial Processing,

Rapid Check Step 2: click ‘Start’

Automatic Reconstruction Report generation

To create a Quality Report while in the field bring up the local processing panel by

selecting ‘Local processing’ from the ‘Process’ menu or by clicking the icon in

the Toolbar. Select only the ‘Initial project processing’ checkbox and the ‘Rapid’

button. If you wish to create a low-resolution orthomosaic while generating the

report, check the ‘Orthomosaic and DSM generation’ checkbox. Click ‘Start’ to

begin rapid processing.

Postflight Terra 3D will now process the data and produce a report that includes

the overall completeness and georeference quality of the images taken during

your last mission. You may use this information to decide whether further imaging flights are required while you are still in the field. The quality report will be

displayed in a new window (click the icon in the Toolbar if it does not appear).

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Quick start guide

3.3 Creating advanced mapping products

Beyond Quality Reports and low-resolution orthomosaics, Postflight Terra 3D can

generate geo-referenced high-resolution 2D orthomosaics, 3D point clouds, triangle models and DSMs or export to common third-party photogrammetry software such as Bingo, Orima or Inpho. Ground Control Points (GCP) can be added to

increase the geo-reference accuracy. Postflight Terra 3Dalso includes amosaic and

a rayCloud editor, giving you more control on the quality of your final mapping

products, as well as measurement tools.

The resulting orthomosaic and DSM may then be imported as custom background

map and elevation data layers in eMotion17. This data can be used for advanced

flight planning in complex or uneven terrain.

Note: You need to either enable tile set generation OR choose Generate Google Maps Tiles and KML from the Process menu before you

can push the tileset into eMotion by choosing Send Map to eMotion

from the Process menu. Alternatively, this data can be imported into

eMotion; choose Import custom map from eMotion’s File menu.

Note: The best way to learn how to use the various features of Postflight Terra 3D is to look at the comprehensive online Knowledge Base

within my.senseFly18

17 see the eBee Extended User Manual for more information on importing layers into eMotion

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Part II

Specifications
Specifications

1 Software requirements

eMotion has the following minimum software requirements:

Operating system Windows XP / Vista / 7 / 8

Hardware 1.6 GHz processor

2 GB RAM

500 MB free storage space

Screen recommended resolution: 1920×1080

visible outdoors

Postflight Terra 3D has the following minimum software requirements:

Operating system Windows XP / Vista / 7 / 8, 64-bit only

Hardware 1.6 GHz processor (2 GHz Intel i5/i7/Xeon recommended)

4 GB RAM (16 GB recommended for large projects)

10 GB free storage space (1 TB recommended for large

projects)

Screen min. resolution: 1024×768

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Processing image data

2 Drone specifications

Size Wingspan: 96 cm

Wing area: 0.25 m2

Weight without camera and battery approx. 0.41 kg

Nominal take-off weight (approx.) eBee: 0.69 kg (1.52 lbs)

eBee Ag: 0.71 kg (1.56 lbs)

(with standard camera & battery)

Material EPP foam, carbon structure & composite parts

Battery 3-cell Lithium-Polymer (0.14 kg)

Nominal endurance (flight time)19 eBee: 50 minutes

eBee Ag: 45 minutes

(with standard camera)

Propulsion Electric brushless motor

Nominal static thrust: 0.63 kgf (6.2 N)

Nominal cruise speed 40-90 km/h (11-25 m/s or 25-56 mph)

Wind resistance up to 45 km/h (12 m/s)

Max. single flight coverage20 eBee: 12 km2(4.6 mi2)

eBee Ag: 10 km2(3.9 mi2)

(on a single battery charge)

19 can vary greatly depending on external factors such as wind, altitude change and temperature.

20 calculated based on the following test conditions: GSD of 30 cm (11.8 in) per pixel, no wind, moderate air temp. (18 C/64.4 F), new fully-charged battery, flight altitude of 1,000 m (3,280 ft) above

ground & take off at approx. sea level from centre of coverage area.

57
Specifications

Communication devices Ground modem:

• Frequency: 2.4 GHz

• Range21: approx. 3 km

• Certification: FCC Part 15.247, IC RSS210, CE

Remote control:

• Frequency: 2.4 GHz

• Range: approx. 1 km

• Certification: CE, FCC

Navigation Up to 50 waypoints

GSD (per pixel) eBee: Down to 1.5 cm (0.6 in)

eBee Ag: Down to 2 cm (0.8 in)

Absolute horizontal eBee (with GCPs): Down to 3 cm (1.2 in)

accuracy eBee (no GCPs): 1 to 5 m (3.3 to 16.4 ft)

eBee Ag (with GCPs): Down to 4 cm (1.6 in)

eBee Ag (no GCPs): 1 to 5 m (3.3 to 16.4 ft)

Absolute vertical eBee (with GCPs): Down to 5 cm (2.0 in)

accuracy eBee (no GCPs): 2 to 5 m (6.6 to 16.4 ft)

eBee Ag (with GCPs): Down to 7 cm (2.8 in)

eBee Ag (no GCPs): 2 to 5 m (6.6 to 16.4 ft)

Relative orthomosaic/ 1-3 times GSD

3D model accuracy

Carry case dimensions 55 x 45 x 25 cm (21.6 x 17.7 x 9.8 in)

21 can vary greatly depending on external factors such as cruise altitude, presence of obstacles and

radio-frequency interference.

58
Processing image data

Glossary

AMSL Above Mean Sea Level

Your eBee’s altitude can be shown and set in eMotion using ATO or AMSL.

Your drone uses the EGM96 mean sea level standard for navigation.

ATO Above the Take-off Altitude

Your eBee’s altitude can be shown and set in eMotion using ATO or AMSL.

Altitudes in ATO are relative to the place your eBee started its motor just

before take-off.

DSM Digital Surface Model

A 3D digital representation of a surface.

FTDI Future Technology Devices International

A Scottish semiconductor device company specialising in Universal Serial

Bus (USB) technology. FTDI cables allow serial connections through a USB

cable. eMotion uses FTDI technology to connect to the ground modem.

You can often connect a computer to a GNSS base station using FTDI.

geo-reference A data point associated with a specific location on the earth’s surface.

GSD Ground Sampling Distance

The distance measured on the ground between pixel centres in an image

or DSM. The smaller the GSD, the higher the spatial resolution of the image.

For example, a GSD of 5 cm means that one pixel in the image represents

5 cm on the ground.

mosaic A single map or terrain model created from several map sections that

have been placed side-by-side and merged together.

orthomosaic A single, corrected image constructed either from several images

taken from different angles, or from several orthophotos. Distortions due

59
Specifications

to different camera positions, ground curvature and relief are corrected for

so that the image displays accurately in the given map projection.

photogrammetry A technique inwhich measurements takenfrom photographs

are used to reconstruct a 3D surface or a series of points in space.

point cloud A set of data points within a coordinate system.

rayCloud Afeature unique to Postflight Terra3Dthat combines the 3D point cloud

with the original images. Multi ray matching with the rayCloud extends the

stereo view triangulation and increases the accuracy of 3D point estimates

while providing a full understanding of 3D results.

triangle model An approximate representation of a surface, constructed from

connected triangles.

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