Converting Absolute to Relative Altitude value

Hello Tudor;

Wish you a Happy New Year.

I wanna ask you please about a Software that can Convert the written Absolute to Relative Altitude values (Batch of Images) since actually it seems that the FW 1.5.30 for P3P is badly writting the ASL values (AGL values are fine). For example the taken picture on the Gnd can differ by 100 m comparing to the reality and the Sky images may their written Absolute values differ between them around 7 meters for the same Mission (During a normal weather condition), same Starting point and different Flights (Multiple batteries).
So do you know or recommend any software for that purpose ?

Thanx;
Zahi

Zahi Khawand 30 de diciembre de 2015 20:15

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Yeah... The ASL values that get written into the images is pretty bad at this point. We have seen it range from +- 50 meters.

We account for it now within our Maps Made Easy processing as long as a ground reference image is included with the rest of the aerial images.

We generally have to write all of our own tools for doing batch processing of images. There are a lot of EXIF viewers that are out there but most of them don't show all of the information that is available.

Tudor 30 de diciembre de 2015 23:01

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Hi Tudor

Just wanted to follow up on this and find out when I run the log file viewer on one of my .DAT files from my P3P Advanced. The altitude level that I get is that above sea level or from ground level?

Mine starts at 34m, is this because I didn't take a ground level image to start with?

Thanks,

Chris

Chris Ricco 18 de agosto de 2016 06:41 0 votos

The CSV provides the barometric altitude which is just the relative altitude from your takeoff point. There is another number that is GPS related as well.

The ground reference image us used by Maps Made Easy to add that offset in automatically during processing.

Zane 19 de agosto de 2016 16:24 0 votos