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Elements and Performance Criteria

1. Plan to review aerial photographs
   • Review forest management objectives and requirements for aerial photographs.
   • Obtain available types of aerial photographs for required locations and application.
   • Assess aerial photographs for suitability to meet forest management objectives and applications.
2. Interpret forest management information from aerial photographs
   • Position aerial photographs for viewing and calculate scale.
   • Identify key aspects from aerial photographs and document these.
   • Interpret and apply photomapping standards for consistent data-collection.
   • Identify and interpret forest attributes and required forest management information from aerial photographs.
   • Map aerial photographs according to organisational procedures.
   • Record and report on analysis of aerial photographs.
3. Update maps and plans from aerial photographs
   • Assess maps and plans and update as required, using established symbols, colours and conventions.
   • Use tools to transfer data in line with manufacturer recommendations.
   • Complete documentation and store according to organisational procedures.

Range Statement

Not Applicable

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Performance Evidence

A person demonstrating competency in this unit must satisfy all of the elements, performance criteria and foundation skills of this unit. If a specific volume or frequency is not stated below, then evidence must be provided that the following requirements have been performed on at least one occasion:

maintain relevant equipment and materials

interpret forest area detail from a map

identify disease symptoms in trees and forest areas using aerial photographs

identify vegetation characteristics on an aerial photograph

locate required photographs from appropriate records (flight plan map)

report and maintain information on details of forest attributes and topographic information

interpret charts, tables, maps and flight plans

identify and interpret title panel information on an aerial photograph

calculate scale of an aerial photograph, scale distances for a map, and calculate and manipulate height and area information

identify map type and map features, including topographic map features.

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Knowledge Evidence

A person competent in this unit must be able to demonstrate knowledge of:

typical scales used on maps and plans, and procedures for their use and manipulation

key aspects of aerial photography including

determining north and flight line path

mapsheet

flight orientation

photography type

focal length

film number

run number

frame number

height above sea level

photography date

forest types and structures and type of information including

area

height

species

crown cover

crown form

disturbance

aspects to be considered as part of the environmental management process.

applications relevant to using aerial photography including

road or plantation design

field navigation and interpretation of forest types

forest structure

environmental processes, including salinity discharge

ecological vegetation communities, including coastal heathlands

land capability classes

remnant vegetation (roadside vegetation)

diseased vegetation classes, including Eucalyptus dieback from Phytophthora.

range of photographic film, and photo types including

project, mapsheet, spot and stratigraphic:

of photographic classes, including terrestrial, vertical and oblique

of aerial photographic film, including black and white, black and white infra-red, colour, colour infra-red.

requirements for aerial photography including

scale

flying height and focal length

required percent endlap and sidelap

orientation

location and number of flight lines required

total number of photographs required

allowable drift, crab, tilt and image motion

camera characteristics, including format, lens quality, shutter speed and aperture, film and filter characteristics

acceptable seasons of the year, time of day, allowable present cloud cover and hot spots

field observations including

accuracy of all mapped topographic information

measure of accuracy of associated base topographic or digital base map

spatial accuracy of strata

measure of accuracy of content of strata

transferring data including

rescaling from one source to another

transferring from map to map

transferring from photograph to map or diapositive to map

care and storage of aerial photographs

procedures for recording and reporting workplace information

maps and plans: cadastral plans; topographic maps; locality plans; site plans and maps and plans generated through the use of geographic information systems (GIS)

representation of topographic features on maps and plans including

roads and tracks

watercourses

ridges and spurs

saddles

peaks and knobs

technology and equipment used to interpret aerial photographs, and procedures for its maintenance including

electronic data transfer technology

manual light tables

mechanical light tables, including Omnigraph, Kartoflex, Zoom Transfer Scope, Artiscope and Sketchmaster.

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