The ornamental design for a surveysystem, as shown and described.
FIG. 1 is a front perspective view of a survey system including a pole of indeterminate length;
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a side view thereof;
FIG. 5 is an opposite side view thereof;
FIG. 6 is an enlarged top view thereof;
FIG. 7 is an enlarged bottom view thereof;
FIG. 8 is a front perspective view of an exemplary survey system showing a pole of exemplary length.
FIG. 9 is a front view thereof;
FIG. 10 is a back view thereof;
FIG. 11 is a side view thereof; and,
FIG. 12 is an opposite side view thereof.
Particular features of the survey system shown with broken lines form no part of the claimed design. The claimed design includes a pole of indeterminate length, as shown in FIGS. 1-7. Thus, the precise length of the pole is not claimed. FIGS. 8-12 are provided to show an exemplary system within the scope of the claimed design that has a pole with a particular length. The claimed design is not limited to that pole length or the particular component spacing shown in FIGS. 8-12.