This topic describes the features that you need to know about before you configure a project.
Spatial interpolation is used to convert scattered measurement data into a continuous statistical surface to assess the distribution patterns of spatial information.
Spatial interpolation allows you to calculate the data of any other locations based on the data from known monitoring stations. Then, you can fill in the colors based on the temperature ranges to generate an isothermal map.
Isosurface layer widget
You can configure a callback ID in the timeline widget, so it can interact with other widgets. Specifically, the data of other widgets is automatically updated when the time on the timeline is changed. After you add the callback ID to other widgets, DataV automatically triggers a data request whenever the time changes and adds the callback ID and its value to the API parameter lists of these widgets. Example:
- Original API address:
- API address after a callback is triggered:
In the preceding example, the callback ID is
- Initial SQL statement:
select :date as value;
- SQL statement after a callback is triggered:
select '2017022722' as value