The FeatureAttributeValuesOverTime is a plot operator that computes a multi-line plot for feature attribute values over time. For distinguishing features, the data requires an id column. The output is a plot in Vega-Lite specification.
FeatureAttributeValuesOverTime
For instance, you want to plot the NDVI values of a feature collection of trees. Then, you can use a multi-line plot to visualize the trees by their id.
idColumn
string
id
"id"
valueColumn
value
"temperature"
The operator consumes exactly one vector operator.
vector
SingleVectorSource
The operator returns an error if the selected columns ( idColumn and valueColumn) do not exist or valueColumn is not numeric.
The operator processes a maximum of 20 different ids. After recognizing more than 20 different ids, the operator ignores the rest.
20
{ "type": "FeatureAttributeValuesOverTime", "params": { "idColumn": "id", "valueColumn": "temperature" }, "sources": { "vector": { "type": "OgrSource", "params": { "data": { "type": "internal", "datasetId": "a626c880-1c41-489b-9e19-9596d129859c" } } } } }