use smaller delta for finite difference estimates to avoid animation artifacts on some projections
use smaller delta for finite difference estimates to avoid animation artifacts on some projections

kidaa/earth,renzomacedo/Clima,zenway33/earth,DougFirErickson/earth,m-funky/earth,ianynchen/earth,chenr6/earth,bernardodiasc/earth,jaythaceo/earth,Colbey/earth,zenway33/earth,robinj/earth,ianynchen/earth,fengxw/earth,fuchao2012/earth,kidaa/earth,awdesch/earth,gardart/earth,fengxw/earth,emirhartato/earth,tuapuikia/earth,awdesch/earth,Burste/earth,chenr6/earth,renzomacedo/Clima,fuchao2012/earth,sobetn/earth,m-funky/earth,grahamrobbo/demojam14,Burste/earth,emirhartato/earth,icedwater/earth,gardart/earth,heatery/earth,Colbey/earth,heatery/earth,tuapuikia/earth,jaythaceo/earth,icedwater/earth,cambecc/earth,Colbey/earth,robinj/earth,cambecc/earth,sobetn/earth,bernardodiasc/earth,DougFirErickson/earth