Input : I have my original data in 4326. This data spans across the globe. This data is collected from DGPS so its accurate to 1 inch. The data is in geometry as geography is costly and functions are limited and in 2D. I am using postgis.
Need: I need to calculate accurate area, length of each geometry.
My conclusion so far : while calculating area either i can dynamically convert the 4326 to respective UTM zones and then calculate area or i can convert it to EPSG:54009 projection to calculate area.
Major question : so which of above method is better ? is there any third better method you can suggest ?
Supportive/minor/Dependent question : how can i cross check the accuracy of both without going to ground ? which one will be accurate. pros and cons if any for each of above methods ?