Meteo

For an area of 500,000 - 1,000,000 km2 process collection data takes an average of 1 minute, about 2-3 minutes will need to process the data with standard interpolation parameters.

For this purpose it is necessary to conduct separate studies in your territory. According to our research, taking into account the density of meteorological stations for the subjects of the Russian Federation method Spline gives the least error.

In the next version we plan to add index calculation drought index icing.

Yes, Spatial Analyst is required

As a rule, to calculate the specialized indexes the system must keep a history of meteorological data. In our extension an opportunity exists to select the constant monitoring territory and regularly update the weather information that will be stored in a local geodatabase. Then you can process this data to calculate your index. In that version  "Meteo" can calculate only Nesterov's index

The current version uses three resources: WorldWeatherOnline (10d / 1d), WorldWeather (5d / 1d), Gismeteo (1d / 3h). In parentheses is "the forecast period" / "time step", available for a free subscription

We do not forecast the weather. We collect and process data from specialized resources using GIS technology for convenient use in the ArcGIS