Getting more Reliable/Accurate Absolute Atitude values

Hello Tudor;

I have the following Proposition:

In a Future Release, Once you run the Map Pilot App, is it possible while the Drone is on the Gnd to let us INSERTING by Hand the Ground Absolute Altitude (MSL or Above Ellipsoid) which is measured by us through an external Accurate GPS device, so the Ground picture will have an Accurate Absolute value and from there once the Drone is in the Sky it will Add its Relative Altitude value to the given Gnd Absolute one in order to get Accurate Absolute values (MSL or HAE) of the taken pictures in the Sky (as long as the weather is stable and during a short period of time). Am I right ? Can we see such feature in the upcoming release ?

I don't know if it can be done by you-Map Pilot App or we shall refer to DJI team-DJI Go App.

Thanx;
Zahi

Zahi Khawand January 04, 2016 17:03

Official comment

Being that Map Pilot never actually touches the image files themselves we do not have the opportunity to do this.

We have addressed this image for our own processing service but there is nothing stopping anyone from manually recording a reference point at the takeoff location and modifying their own tags according to that reference. What you are describing is basically what we are doing in the Maps Made Easy backend except we get the number from SRTM data.

Writing a script to do this would likely be trivial.

Tudor January 04, 2016 17:12

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3 comments

You are right Tudor as long as your MME is able to read the relative values from the Exif and then adding the Absolute value from the Gnd photo + SRTM data. But in case we are using our stand-alone software so it will be helpful I guess.

From the other hand; do you think that using P3P along with GCPs (taken by an Accurate GPS) for generating Accurate and Reliable DEM and Georeferenced Orthophotos is reliable ? Is such drone can be safely used for such work / purpose ?

Thanx;

Zahi Khawand January 04, 2016 17:51 0 votes

Manual GCPs certainly takes a little more forethought and understanding than utilizing the EXIF tags does but it generally produces outputs that are on par with, if not better than, the automatically generated stuff if done properly.

There is no reason a P3P can't be used to create such maps.

Tudor January 04, 2016 17:54 0 votes