Drone mappers and surveyors, this 100-pack of Sky High Bull's-Eye targets is exactly what you need for professional-grade accuracy! These 18x18 inch disposable GCPs feature that classic black and white checkerboard pattern that works perfectly with all the major photogrammetry software like Pix4D and DroneDeploy. The matte finish reduces sun glare while maintaining great visibility from the air. Each target has a center hole that's compatible with 60D nails and 3-inch Mag Spikes for precise placement, plus corner holes for extra stability on windy days. The package includes 500 wooden stakes for anchoring and this awesome carrying bag that holds everything - targets, stakes, and even has a front pouch for your flight log or notebook. Made from thick but lightweight cardstock, they're durable enough for field use but economical enough to be disposable. Seriously, if you're doing serious drone mapping work, these ground control points will take your accuracy to the next level without breaking the bank!