Isohyets

https://www.google.com/search?num=10&hl=en&site=imghp&tbm=isch&source=hp&biw=1280&bih=662&q=Infrared+aerial+photo&oq=Infrared+aerial+photo&gs_l=img.3..0i24j0i5i24l2.13347.28567.0.29594.21.19.0.2.2.0.377.3148.5j9j1j4.19.0...0.0...1ac.1.f0ijkkuQp9s#hl=en&site=imghp&tbm=isch&sa=1&q=isohyets&oq=isohyets&gs_l=img.1.0.0j0i24l4j0i5i24l2.3775.15706.0.18555.12.12.0.0.0.0.401.1545.5j5j4-1.11.0...0.0...1c.1.mWnYPM7BYoc&bav=on.2,or.r_gc.r_pw.r_cp.r_qf.&fp=1577767060329d02&biw=1280&bih=662


Isohyets

This type of map has lines on it to determine how much rain fall.