Mean/True Rahu Ketu
Default setting is Mean.
The true and mean calculation for Rahu & Ketu often impacts the degree that changes their sublord in the planet signification table.
Rahu Ketu represents
Default value is Rahu and Ketu represents its sign lord only.
In lagna chart Rahu-Ketu represent the following:
a) The planets they are conjoined with.
b) The planets aspecting them.
c) Lord of the sign occupied by them.
Layout
You can use Google to find and populate the values
Decimal values for the coordinates, or latitude and longitude, are needed.
Example Google search query: What are Delhi's decimal latitude and longitude?
Daylight Saving Time (DST)
DST is the practice of putting clocks forward and backward in many nations, including the United States, in order to maximize the use of natural sunshine.
Jyotish Portal will automatically apply DST when generating the chart. The DST value, T or F, is printed on the output. DST is not observed in India.
Calculation Engine
Classic follows the older calculation style seen in KP reference books and is the default. Geocentric is On by default in this mode.
Swiss is the preferred modern calculation mode; in this mode, Geocentric is always Off.
Both modes usually give very close results, but small minute-level differences can occur. In stellar astrology, that may sometimes change the sub-sub lord.