Embodiments of the present invention relate to a court marking switching system, including: singles and doubles markings, wherein the singles and doubles markings present white color when they are not lit up, and present a same color with surrounding floor when they are lit up; a switching element which lights up the singles markings and turns off the doubles markings when receiving a doubles command and lights up the doubles markings and turns off the singles markings when receiving a singles command. During the doubles match, only the singles markings are lit up, the lit singles markings present a same color with that of the surrounding floor and are not easy to be observed, while the doubles markings which are not lit up present a white color, such that only the white doubles markings may be observed by a user.

A template for properly determining the positions for the yardline numbers of an American-style football field includes a generally rectangular frame having an external perimeter and an internal opening defined by an internal perimeter. The shape of the internal opening, and the corresponding shape of the internal perimeter, is such that for each of the yardline numbers, i.e. 5, 4, 3, 2, 1, and 0, the internal perimeter defines a plurality of locations for abutting a corresponding plurality of outer edge portions of the yardline number. With the external perimeter appropriately aligned along one or more lines of the field, the frame can be used to properly locate any one of the six yardline numbers that are needed to properly locate all of the yardline numbers on an American-style football field. This frame reduces the number of templates needed to locate the yardline numbers of a football field, and also simplifies the process of properly locating the yardline numbers.

A pre-visualization device (10) for movie, game, and other digital media creation, the pre-visualization device (10, comprising: one or more markers (13); a motion capture camera system (14); wherein the one or more marker(s) (13) is/are adapted to be physically located and moveable on a marker plane (12), wherein each marker (13) comprises means (13a) adapted to provide position data in relation to its position (P) on the plane (12), the position and possibly movement is captured using the motion capture camera system (14).

A pre-visualization device (10) for movie, game, and other digital media creation, the pre-visualization device (10, comprising: one or more markers (13); a motion capture camera system (14); wherein the one or more marker(s) (13) is/are adapted to be physically located and moveable on a marker plane (12), wherein each marker (13) comprises means (13a) adapted to provide position data in relation to its position (P) on the plane (12), the position and possibly movement is captured using the motion capture camera system (14).

Various marking apparatuses are provided that incorporate a soluble component and a marking component. The soluble component dissolves in the presence of a solute and the marking component is left as a residue that can be used, for example, to designate a boundary for a recreational activity.

In one example, the marking apparatus may be a marking tape that can be utilized to apply a temporary mark on a surface. The marking tape can be affixed to the surface by, for example, inserting a stake through one or more apertures of the marking tape. The user may also utilize measurement guides provided on the marking tape to accurately measure distances without the use of extra equipment.

When exposed to a solute such as water, the soluble component of the marking tape dissolves and leaves behind the marking component. Both the soluble component and the marking component may be biodegradable and the marking tape may require little to no upkeep after deployment.

A demarcation system for demarcating a playing area for a sport includes a plurality of strips lying on a shared plane and defining a boundary of the playing area. The plurality of strips is configured to rest on a ground surface to define a portion of the ground surface as a playing surface for the sport. The plurality of strips is foldable in an accordion fold fashion for storage.

A device for marking natural and artificial grass surfaces, which comprises a mowing drum linked to a chassis, wherein the mowing drum comprises a plurality of cutting elements and can rotate around a main shaft, where a perforated sheet is arranged between the mowing drum and the grass surface, with said perforated sheet comprising a plurality of holes cut to an appropriate size so as to allow blades of grass to pass through them, in addition to an opening configured to facilitate the passage blades of grass to be cut by the cutting element.

A device for marking natural and artificial grass surfaces, which comprises a mowing drum linked to a chassis, wherein the mowing drum comprises a plurality of cutting elements and can rotate around a main shaft, where a perforated sheet is arranged between the mowing drum and the grass surface, with said perforated sheet comprising a plurality of holes cut to an appropriate size so as to allow blades of grass to pass through them, in addition to an opening configured to facilitate the passage blades of grass to be cut by the cutting element.

Sports field marking equipment includes a) a paint applying means adapted for marking a sports field on a surface; b) a position determining device configured for determining the position of the sports field marking equipment; c) a distance sensor configured for detecting a goal and/or corner post and the distance thereto; d) a first processor; and e) a first memory coupled to the first processor. The first memory includes program instructions executable by the first processor for receiving a goal and/or corner post detection signal and the measured distance from the distance sensor to the goal and/or corner post; receiving the position and direction of the sports field marking equipment from the position determining device at the time of receiving the detection signal; computing waypoint coordinates of the goal and/or corner post based on the received data; and storing the computed waypoint coordinates of the goal and/or corner post.

The invention relates to a marking device (10; 100) for marking a football field layout. The marking device (10; 100) comprises a drive unit (1; 101) and a trailer unit (2; 102), wherein the drive unit (1; 101) comprises a frame, at least three wheels (8a-8c, 108a-108c) for carrying the frame, in particular one line spray nozzle (11) for marking straight lines on the ground, the line spray nozzle (11), being fixedly attached to the frame or moveably attached to the frame for adjusting the position of the line spray nozzle (11), a motor (16a) for driving at least one of the wheels (8a-8c) of the drive unit (1) and/or a handle (16b) for a user to push the drive unit (101), in particular a drive unit pump (28) for pumping paint to the nozzle, and a command unit (5) for commanding the pump and/or nozzle and/or motor. The drive unit (1; 101) and the trailer unit (2; 102) are attached through a coupling, in such a way, that the trailer unit (2; 102) is pullable by the drive unit. The trailer unit (2; 102) comprises a support frame, at least one, in particular two, wheel (13a, 13b) for carrying the support frame, and at least one set of, in particular forty, symbol spray nozzles (12) for spraying a symbol on the ground, the nozzles (12) being fixedly attached to the support frame.