Low Image Overlap

When the overlap between images is limited this can cause low accuracy and stitching errors within your mission. The key to producing an accurate model in Kespry Cloud is better image overlap. A few of the reasons you may be experiencing low image overlap include:

1. Placing a pile at the edge of a mission reduces the potential amount of overlap between photos. The edge of the mission is usually where the image overlap is less frequent compared to the inner portion of the mission. To solve for this extend your flight boundaries.

2. An imaging height that is too low.

3. Cloud cover or shadows.

4. Difficult to stitch terrain (material that is too dark or too bright).

Every measurement, regardless of what you’re measuring, has some uncertainty. You can take careful measurements however it’s often easier and much more effective to take multiple measurements and find an average. The same is true with the Kespry drone.  Every image is a measurement for all points visible in that image. If you want those points to be accurate, you can take multiple measurements. Multiple measurements mean multiple images where those points are visible. Multiple images with points visible means image overlap will be more frequent. As a result, the guidelines for overlap is directly tied to accuracy. Since overlap isn’t the same for an entire mission (i.e. the boundaries), neither is the accuracy. Since the edge points don’t have as many measurements, they are not as accurate.