The coverage page provides information on the geographic location where images in the SD card were captured based on the GPS module information.
Clicking the “captures.kmz” link will cause the camera to generate a KMZ file that will be downloaded by your browser. The KMZ file contains the lat/lon/alt of all captures in the SD card and can be used to verify coverage after a flight or series of flights. The KMZ file can be opened using Google Earth or a GIS application.
KMZ File Can Be Viewed In Applications Like Google Earth
The Coverage Estimator is a tool for quickly checking that a flight has sufficient overlap. From the initial Coverage Page, select one or more image sets to estimate and click “Next” (note: image sets must be geographically close together in order to work properly).
The Flight Adjustment tab should appear, and show a summary of its current estimation settings. Camera Orientation indicates the directionality of the camera with respect to the aircraft, as shown below.
Landscape Orientation on Left, Portrait Orientation on Right
The Flight AGL is estimated based on the GPS positions recorded for the images, with the assumption that calibration panel pictures were taken near ground level, but if the estimate is incorrect, you can manually enter the correct AGL.
The Estimate Resolution sets the quality of the output map. Low is sufficient for most applications.
Confirm or Edit Coverage Estimate Settings
Clicking “Draw Coverage” will render the coverage estimate. The rendering time depends on your device’s CPU, the size of the field, number of images, flight AGL, and quality setting, but typically runs in under 30 seconds on a modern smart phone.
Finally, you will be presented with an estimate of your coverage. Any area that is dark green has a high probability of correctly being processed in ATLAS. Areas that are yellow may work, but likely will not. Red areas will almost certainly not process correctly.
Example of Good Field Coverage
Edges around the field will typically show as red or yellow. This is okay as long as the data you are trying to collect is all contained within the dark green region.
Example of Poor Field Coverage
If you discover your field coverage estimate is similar to the poor field coverage map shown above, double check to make sure the Flight AGL is set correctly. If the Flight AGL is incorrect, click back on the Flight Adjustment section, correct the Flight AGL, then click on “Draw Coverage” again. If the Flight AGL is correct, your overlap settings may have be wrong. You will need to capture more images of the field to ensure that post-processing will be successful.