A Measurement on a Site. For example, the pH of soil on 3 January 2020. The method used to take the Measurement often changes the results, and is ideally described.
Field | Type | Required | Definition |
---|---|---|---|
term | Term | Yes |
A reference to the Term describing the Measurement. |
description | string | No |
A short description of the Measurement. |
value | array[number|null] | No |
The quantity of the Measurement. If an average, it should always be the mean. Can be a single number (array of length one) or an array of numbers with associated dates (e.g. representing multiple Measurements over time). |
sd | array[number|null] | No |
The standard deviation of value. |
min | array[number|null] | No |
The minimum of value. |
max | array[number|null] | No |
The maximum of value. |
statsDefinition | string | No |
What the descriptive statistics (sd, min, max, and value) are calculated across, or whether they are simulated or the output of a model. Spatial is descriptive statistics calculated across spatial units (e.g., pixels) within a region or country. Possible values are: |
observations | array[number|null] | No |
The number of observations the descriptive statistics are calculated over. |
dates | array[string] | No | |
startDate | string | No |
For period Measurements, the start date of the Measurement (if different from the start date of the Site) in ISO 8601 format (YYYY-MM-DD, YYYY-MM, or YYYY). |
endDate | string | No |
For period Measurements, the end date of the Measurement (if different from the end date of the Site) in ISO 8601 format (YYYY-MM-DD, YYYY-MM, or YYYY). |
measurementDuration | number | No |
The duration of the Measurement in days. |
depthUpper | number | No |
For soil Measurements, the upper (shallower) depth of the Measurement interval in centimeters, using positive numbers. |
depthLower | number | No |
For soil Measurements, the lower (deeper) depth of the Measurement interval in centimeters. |
latitude | number | No |
The latitude of the Measurement if different from the centroid of the Site (-90 to 90, WGS84 datum). |
longitude | number | No |
The longitude of the Measurement if different from the centroid of the Site (-90 to 90, WGS84 datum). |
properties | List[Property] | No |
A list of Properties of the Measurement, which would override any default properties specified in term. |
methodModel | Term | No |
A reference to the Term describing the method or model used to acquire the measurement. |
methodModelDescription | string | No |
A free text field describing the method or model used to acquire the Measurement. |
source | Source | No |
A reference to the Source of these data, if different from the defaultSource of the Site. |
Internal Properties
Field | Type | Definition |
---|---|---|
@type | string | Measurement |
schemaVersion | string |
Version of the schema when the data was created. |
added | array[string] |
A list of fields that have been added to the original dataset. |
addedVersion | array[string] |
A list of versions of the model used to add these fields. |
updated | array[string] |
A list of fields that have been updated on the original dataset. |
updatedVersion | array[string] |
A list of versions of the model used to update these fields. |
aggregated | array[string] |
A list of fields that have been 'aggregated' using data from multiple Sites. |
aggregatedVersion | array[string] |
A list of versions of the aggregation engine corresponding to each aggregated field. |
JSON-LD Example 1
JSON-LD Example 2