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Product pages » SLATS Star Transect Data

SLATS Star Transect Data

Last modified by Bec Trevithick on 2017/10/26 12:03

SLATS star transects - densitometer, point intercept measurements and ancillary data, field sites

pointintercept.jpg

Figure 1: Star transect point intercept measurement collection

Link to the data

DescriptorData linkLayer name
Persistent URLhttp://www.auscover.org.au/purl/slats-star-transects-all-sites
GeoNetwork recordNot available yet
CSV Filehttp://qld.auscover.org.au/geoserver/aus/wfs?service=wfs&version=1.1.0&request=GetFeature&typeNames=aus:star_transects&outputFormat=csvaus:star_transects
Data Portal (in development)http://qld.auscover.org.au/public/html/field-delivery/star transects

Data licence and Access rights

ItemDetail
RightsCopyright 2010 - 2020. JRSRP. Rights owned by the JRSRP. Rights licensed subject to Creative Commons Attribution (CC BY 4.0).
LicenceCreative Commons Attribution 4.0 License, http://creativecommons.org/licenses/by/4.0.
AccessThese data can be freely downloaded and used subject to the CC BY licence. Attribution and citation is required as described at http://www.auscover.org.au/citation. We ask that you send us citations and copies of publications arising from work that use these data.

Abstract or Summary

This dataset has been compiled as a record of vegetative and non-vegetative fractional cover as recorded in situ according to the method described in Muir et al (2011). The data collected are used to calibrate and validate large area fractional cover spatial datasets derived from remote sensing. These spatial datasets are produced regularly—monthly, seasonally, annually—enabling change in ground cover to be monitored consistently across Australia. 

The data is collected in three strata:

  • non-woody vegetation including vegetative litter near the soil surface
  • woody vegetation less than 2 metres
  • woody vegetation greater than 2 metres.

The simplified structural description discriminates the cover fractions within the vertical vegetation profile for the purpose of calibrating and validating remotely sensed products. 

This data set is compiled from a variety of sources, including available sites from the ABARES ground cover reference sites database.

Spatial and Temporal extents

ItemDetail
Typical spatial resolution1 ha
Spatial coverage (degrees)110.000000 to 155.001329 E, -10.000000 to -45.000512 N
Temporal resolution1 day
Temporal coverage1995-01-01 to ongoing
Sensor(s)Densitometer point intercept measurements
ItemDetail
Spatial representation typevector - point
Spatial reference systemWGS 84

Point of contact

ItemDetail
NameRebecca Trevithick
OrganisationRemote Sensing Centre - Queensland Department of Science, Information Technology and Innovation
PositionSenior Scientist (Remote Sensing)
Emailrebecca.trevithick@qld.gov.au
RolepointOfContact
AddressRemote Sensing Centre, DSITI, EcoSciences Precinct
Telephone(07) 3170 5679

Credit

The following organisations contributed to the data collection:

  • Joint Remote Sensing Research Project
  • Royal Melbourne Institute of Technology
  • Curtin University
  • University of Adelaide
  • CSIRO
  • Northern Territory Department of Environment and Natural  Resources

Keywords

ThesauriKeyword
GCMDEARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION COVER
CFvegetation_area_fraction
FoREnvironmental Sciences > Ecological Applications = 0501

There are three main thesauri that AusCover recommends:

  1. Global Change Master Directory (http://gcmd.nasa.gov)
  2. Climate and Forecast (CF) convention standard names (http://cfconventions.org/standard-names.html).
  3. Fields of Research codes (http://www.abs.gov.au/ausstats/abs@.nsf/0/6BB427AB9696C225CA2574180004463E?opendocument).

Data quality

Data has been collected in accordance with the national guidelines outlined in Muir et al (2011) (see References for full details).  Locational accuracy of the data varies with site and GPS available. See the attribute data for details.

Validation status

The effect of various observers collecting the data has been investigated by Trevithick et al (2012) (See References for full details).

Related products

ItemProduct link
Seasonal fractional coverSeasonal fractional cover

References

ItemDetail or link
PublicationMuir, J, Schmidt, M, Tindall, D, Trevithick, R, Scarth, P & Stewart, JB, 2011, Field Measurement of fractional ground cover: a technical handbook supporting ground cover monitoring for Australia, prepared by the Queensland Department of Environment and Resource Management for the Australian Bureau of Agricultural and Resource Economics and Sciences, Canberra, November.
PublicationTrevithick, R., Muir, J. & Denham, R, 2012, The effect of observer experience levels on the variability of fractional ground cover reference data. Proceeding of the 16th Annual ARSPC, Melbourne, Australia, August 31 - September 4th 2012.
Online infoField data collection protocol: Star Transect

Sampling strategy

Star transect locations are selected to cover homogenous areas of approximately 1 ha. Exact details of site selection are outlined in the ground cover handbook (Muir et al., 2011) (See References section for full details). 

Product version history

Version labelDetail
1.0Initial release

Data Attributes

FieldDescription (units)Format
sitePlot nameText
obs_timeDate plot commencedDate and time stamp
observersNames of observersText
longitudeLongitude in decimal degrees of plot centre (decimal degrees)Float
latitudeLatitude in decimal degrees of plot centre (decimal degrees)Float
descriptionBrief description of site and conditionsText
total_basal_areaTotal basal area, in, including dead trees (kg/m^2) Float
live_basal_areaTotal basal area, excluding dead trees (kg/m^2) Float
persistent_greenPersistent green estimate from point intercept data calculated using this formula: ???Float
crustProportion of ground layer point intercept observations recorded as soil crust (ratio)Float
distProportion of ground layer point intercept observations recorded as disturbed soilFloat
rockProportion of ground layer point intercept observations recorded as rockFloat
greenProportion of ground layer point intercept observations recorded as green attached leafFloat
deadProportion of ground layer point intercept observations recorded as dry/dead attached leafFloat
litterProportion of ground layer point intercept observations recorded as detached litterFloat
cryptoProportion of ground layer point intercept observations recorded as cryptogamFloat
mid_gProportion of mid storey layer point intercept observations recorded as green leafFloat
mid_dProportion of mid storey layer point intercept observations recorded as dry leafFloat
mid_bProportion of mid storey layer point intercept observations recorded as branchFloat
crnProportion of over storey layer point intercept observations recorded as falling within the crown of a tree, regardless of whether a gap or interceptFloat
over_gProportion of over storey layer point intercept observations recorded as green leafFloat
over_dProportion of over storey layer point intercept observations recorded as dry leafFloat
over_bProportion of over storey layer point intercept observations recorded as branchFloat
num_pointNumber of intercept points recorded along transectInteger
unoccludedNumber of intercept points where the ground was not occluded by vegetation Integer
obs_keyUnique identifier for site and visit for data management purposesText
geomGeometry in WKT format 

Metadata history

DateDetail
2013-09-13Metadata creation date
2017-10-20Updated abstract
Tags:
Created by Bec Trevithick on 2013/03/14 10:25

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