Information processing apparatus, information processing method, program, and information processing system

An information processing system comprising:

• an ambient light sensor including a light reception section on which a light shielding body casts a shadow and a light reception section which does not come under an influence of the light shielding body;
• a ratio calculation section that calculates ratio information which is a component ratio of ambient light by detection values obtained at the respective light reception sections so as to correspond to vegetation data of each time point;
• an extraction section that extracts, from a data group including vegetation data of multiple time points respectively associated with ratio information which is a component ratio of ambient light, vegetation data for use by using the ratio information;
• and
• a generation section that generates vegetation change information indicating a time series change of a vegetation state by using the vegetation data extracted by the extraction section.