This is the fourth article in the “Satellite Imagery API” series. You can find information about our product, its capabilities and why you should use it in the first article in the series: “Why the Satellite Imagery API?”
The Satellite Imagery API allows you to get NDVI and EVI vegetation indices for your polygon. You can get this data in the form of an image or in numerical form.
You can get information about the polygon creation process from the documentation on our website or from the article in our blog.
The numerical statistics for these indices for your polygon are returned in a separate part of the API response. This part of the response allows you to get precise data on how the NDVI and EVI values are distributed for your polygon:
- The minimal and maximal values of the NDVI and EVI indices
- Their average and median values
- The standard deviation, and the first and third quartiles.
Using this data, you can build a visual graph of the dynamics of the indices.
To get metadata and statistics for your polygon, you need to follow two simple steps:
- Specify your polygon ID, the search date range and your API key. In the API response, you will receive an array, sorted on the date interval in the request. The array contains JSON format structures with a “stats” field, which has the URLs of all of your polygon’s NDVI and EVI values in our database that satisfy your specified search conditions.
- Copy the URLs from the “stats” part of the API response and make the API call. In the results, you will get the metadata and statistics for your polygon.
Please also see the other articles in this series:
- Why the Satellite Imagery API? How to work with the Satellite Imagery API
- How to get an image of your polygon in PNG format
- How to get tiles with your polygon in PNG format with “tile”
- How to get your polygon in GeoTIFF format with “data”
- Visualisation of the NDVI index on satellite maps. Custom palettes for agricultural applications