Instructions

Objectives

Each group has multiple satellite images. The objective is to label every building rooftop area in each of the satellite images. When all of the buildings present are covered by polygons, click the "Labeling Complete" checkbox to continue on. Each rooftop area should be covered completely by one single shape.

Draw Mode

Draw mode is used to draw new control points to cover rooftop areas. Left Click to draw new points, and Right Click to complete your shape. Pressing your keypad's Delete Key in this mode removes the most recently placed control point.

Edit Mode

Edit mode is used to drag previously placed control points for better accuracy and for deleting poor quality labels. Left Click on a control point and drag to move it. Selecting a shape and pressing your keypad's Delete Key in this mode removes the shape.

Keep in Mind!

Only the most accurate work will be accepted and considered for continued compensation. We will manually inspect all annotations to ensure equality. Please do your best to distinguish between building rooftops and tricky areas, like brown grasslands. While we realize these are tricky, we expect annotators to do their best to do high quality work. Please let us know of any feedback you may have.

Example Annotations