--- Start of Idrisi List message Hello everyone, is there any of you who has an algoritm or a script or extension (Fortran, VB, Avenue) to calculate the amount of annual sunlight, considering the sun position relative to the position and the elevation (from a DEM). I'm searching through the Web, but so far I've found only a script in AML (Arc Macro Language of ArcInfo) which calculates the position of the sun (altitude and zentih) for a given location and time. Thanks a lot. Gabriele Gabriele Antolini Unità Ricerca e Sviluppo Area Agrometeorologia e Territorio ARPA - Servizio Meteorologico Regionale 40122, Viale Silvani 6, Bologna, Italia tel +39/051-28 45 99, fax 28 46 64 [EMAIL PROTECTED] www.smr.arpa.emr.it --- End of Idrisi List message IDRISI-L is an unmoderated list. As a service to list users, please post a summary of useful responses to your questions. To post a message to IDRISI-L, send it to [EMAIL PROTECTED] To subscribe to the list, send an email from the address to be subscribed to [EMAIL PROTECTED] with "subscribe" (without quotes) as the first line of the message body. To unsubscribe, do the same, only with "unsubscribe" as the first line of the message body.