210615 to Seitah

Conversion of DMS sexagesimal coordinates to DD decimals

Two systems co-exist to determine the coordinates of an object on Mars although one of them dominates the IAU database. This site favours decimal-type planetocentric coordinates over all planetographic coordinates. If you have DMS coordinates (Degrees, Minutes and Seconds) to locate a location, you can convert them here to decimal planetocentric coordinates.
Unlike decimal coordinates, sexagesimal coordinates cannot be negative. A latitude is counted from 0° to 180° on either side of the 0 meridian. The final letter E or W specifies the east-west position relative to the reference meridian. The letter N or S of the latitude specifies the northern or southern hemisphere relative to the equator.

In the planetocentric system longitude is counted in the opposite direction to the rotation of Mars from 0° to 360° eastward. Planetographic longitude is counted in the direction of the planet's rotation from 0° to 360° to the west. From the 0 meridian, the 2 systems give diametrically opposite coordinates.

In this form, only arc seconds accept decimals with the point as separator. Limit the entry from 2 to 4 decimal places.

Regardless of the coordinate system, NORTH latitude is counted from the equator from 0° to 90° towards the North Pole and SOUTH latitude is counted from 0° to -90° towards the South Pole. Your coordinates are followed by a letter. Choose the corresponding button.

Photo: This image is a cropped version of a panorama made by Thomas Appéré from 82 photos taken by the Mastcam-Z Right camera on the head of the Perseverance rover on sol 114 (June 15, 2021) at 12:40 p.m. local Martian time. The Perseverance rover is heading towards Séítah, a region with sandy ripples. Credit:  NASA/JPL-Caltech/MSSS/ASU/Thomas Appéré.

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