LA - Leaf Area Index (LAI) and Radiation Measurements

Form: LAM - Results of hemispherical measurements

Active since: 2009 Last change: 2018

!Sequence; code_country; code_plot; survey_id; point_id; field_of_view; date_measure; time_measure; lai_max_point; sai_point; date_sai; gap_fraction_point; omega_point; code_sky; code_sun; other_observations

POSITION FIELD DESCRIPTION
1 Sequence (integer)

Description: Continuous number to identify the line of the submitted file
Format: I
2 code_country (code)
M K

Description: ID of the country
Format: I
Dictionary: d_country
3 code_plot (code)
M K

Description: Observation plot number
Remarks: A unique number (per country) given to the permanent plot during the selection or installation
Format: I
4 survey_id (integer)
K

Description: LAI survey ID
Format: I
Explanatory Item: 191
5 point_id (integer)
K

Remarks: 99 = plot mean calculated
Format: I
Explanatory Item: 195
6 field_of_view (degrees)

Description: Field of View used for analysis
Remarks: may be less than 180° in the case of measurments on a slope
Format: I
7 date_measure (DDMMYY)
M K

Description: Date of measurement
Format: Date
8 time_measure (HHMMSS)
M K

Description: Time of field observation
Remarks: E.g. '9:45:53' = '094553'
Format: C
9 lai_max_point (m²/m²)

Description: LAI of this point at date of maximum foliation
Format: F
10 sai_point (m²/m²)

Description: SAI of this point in the leafless stage in winter
Format: F
11 date_sai (DDMMYY)

Description: Date of related SAI measurement
Format: Date
12 gap_fraction_point (%)

Description: Measured gap fraction at each point
Format: F
13 omega_point

Description: Clumping coefficient used in clumping correction (point-level)
Format: F
14 code_sky (code)

Description: Sky conditions during the measurement
Format: I
Dictionary: d_sky_condition
15 code_sun (code)

Description: Sun position
Format: I
Dictionary: d_sun_position
16 other_observations (FREE TEXT)

DB Column: other_obs
Description: Supplementary comments
Format: C

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