MDDF - description

Multi Dimensional Data Format structure contains 9 variables, where d and TestParameters are the most essential, because they contains the data which can be further processed. The other variables are used for the correct data description – coordinate system, time zone, etc.

MDDF file name following the scheme: MDDF_EPIZODNAME_file_description.

Variable name

Type

Description

CRS

char

Coordinate Reference System
EPSG code (or local) mapping surveying (http://epsg.io), standard WGS84 (EPSG: 4326)

d

struct

The variable containing the data. The data may be as a single variable, a vector or an array. d structure contains the following fields:

Station_codename – Code name of the station
Measurements – Number of measurements or sample collection in the field. Structure containing the following fields:

Date – Time of measured parameter/sample collection
Tests – Number of test performed/ measured parameters. Structure containing the following fields:

Test_name_id – Id of measured parameter/test
Result – Result of measured parameter/test
Result_duplicate (optional) – Quality assurance check

Stage (optional) – Stage of monitoring
Measurement_method (optional) – Method of measurement

dDescription

cell

Description of the fields of ‘d’ variable. A cell contains two columns: the first contains the name of the field/column of data, the second contains a description of them. All data must be specified.

Description

char

The text description of the data contained in the file

FormatName

char

Name of data format MDDF (Multi Dimensional Data Format).

FormatVersion

real

When changing/expansion of the format change its version. It can have one number after the decimal point.

TestParameters

struct

The variable containing the parameters of data. The data may be as a single variable, a vector or an array. TestParameters structure contains the following fields:

Test_name – Name of test/measured parameter
Unit – Unit of test/measured parameter
Type – Data type number:

An array contains two columns: the first contains the name of the field/column of data, the second contains the data type number. All data must be specified. The Numbers of Data type:

1 – the real data without limits,

2 – the integer data,

3 – text value,

4 – the real number rounded to 0.1 (shown as 11),

5 – time in Matlab format serial time – the time display format; seconds with accuracy 1/10,

6 – the real data display in an engineering manner with one decimal place, e.g.: 3.5E6, (obsolete, recommended 2cd)

7 – the real data display in an engineering manner with two decimal place, (obsolete, recommended 2cd)

bc – (b and c are code digits) the real data is displayed in fix-point manner with at minimum b places before decimal and c decimal place,

e.g. For number 3.149.

10: „3”

11: „3.1”

12: „3.15”

20: „03”

23: „03.149”

1bc– the same manner as bc, but with place for a sign (space for sign „+”, sign ‘-’ for sign „-”),

2cd– (c and d are code digits), the real data is displayed in an engineering manner, with place for a sign (space for sign „+”, sign ‘-’ for sign „-”), with c decimal place and exponent expressed by d places. The sign in exponent is always displayed.

e.g. For number 0.001

211: „1.0E-3”

221: „1.00E-3”

212: „1.0E-03”

222: „1.00E-03”

e.g. For number 1000

211: „1.0E+3”

221: „1.00E+3”

212: „1.0E+03”

222: „1.00E+03”

Technique (optional) – Technique
LOD (optional) – Limit of detection (Lower and Upper)
LODType (optional) – Data type number of LOD
Accreditation (optional) – Accreditation body

TestParametersDescription

cell

Description of the fields of ‘TestParameters’ variable. A cell contains two columns: the first contains the name of the field/column of data, the second contains a description of them. All data must be specified.

TimeZone

char

Acronym of Time Zone (http://en.wikipedia.org/wiki/List_of_time_zone_abbreviations), normally UTC

Table 1. The structure of Multi Dimensional Data Format

variable	Field name	Storage format
d	Station_codename	char
	Measurements	struct
	Measurements.Date	double
	Measurements.Tests	struct
	Measurements.Tests.Test_name_id	double
	Measurements.Tests.Result	double
	Measurements.Tests.Result_duplicate	double
	Measurements.Stage	char
	Measurements.Measurement_method	char
TestParameters	Test_name	char
	Unit	char
	Type	double
	Technique	char
	LOD	double
	LODType	double
	Accreditation	char

Table 2. The format of fields ‘d’ and ‘TestParameters’ variables

Data details:
‘d’ structure contains the following fields:
Station_codename – Code name of the station
Measurements – Number of measurements or sample collection in the field. Structure containing the following fields:
Date – Time of measured parameter/sample collection
Tests – Number of test performed/ measured parameters.. Structure containing the following fields:
Test_name_id – Id of measured parameter/test
Result – Result of measured parameter/test
Result_duplicate (optional) – Quality assurance check
Stage (optional) – Stage of monitoring
Measurement_method (optional) – Method of measurement

‘TestParameters’ structure contains the following fields:
Test_name – Name of test/measured parameter
Unit – Unit of test/measured parameter
Type – Data type number
Technique (optional) – Technique
LOD (optional) – Limit of detection (Lower and Upper)
LODType (optional) – Data type number of LOD
Accreditation (optional) – Accreditation body

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