Extracting building height from GEDI data
Posted: Sat Aug 27, 2022 12:54 pm America/New_York
I am doing PhD in earthquake damage scenario analysis using GIS and remote sensing techniques. Since Lidar data is so costly and we are not at all in a position to afford such surveys, I am trying to extract building height for my study area (which is an urban area and a highly populated one) from as many sources as possible.
I have downloaded GEDI L2A h5 data (BEAM 0101, 0110, 1000, 1011). But couldn't able to go to next step. I have read journal papers and technical documents but somehow stuck in a loop. I would like to know, by using elev_highestreturn, elev_lowestmode, lat_lowetsmode and long_lowestmode - will i be able to extract the height of an object (whether it's a tree or building).
From my understanding - after converting ellipsoidal height to orthometric heights (i am applying EGM 2008 geoid parameters), the difference between highestreturn - lowestmode will be the elevation of an object. Is what I have understood correct ?
Attached is an example file - which i have opened in Panoply.
I have downloaded GEDI L2A h5 data (BEAM 0101, 0110, 1000, 1011). But couldn't able to go to next step. I have read journal papers and technical documents but somehow stuck in a loop. I would like to know, by using elev_highestreturn, elev_lowestmode, lat_lowetsmode and long_lowestmode - will i be able to extract the height of an object (whether it's a tree or building).
From my understanding - after converting ellipsoidal height to orthometric heights (i am applying EGM 2008 geoid parameters), the difference between highestreturn - lowestmode will be the elevation of an object. Is what I have understood correct ?
Attached is an example file - which i have opened in Panoply.