Hey I seach for a source for high resolution height maps (about every 4m and for every (1-4) height meters)

Did anyone know such a open source? would be very nice :D
but please no javascript api

GoogleMapsAPI is limited and so no real option - want to ask 1 000 000 times per day

309639512s ago, by Antonio

I´ve found a map for every 2km, but still no of 1-4m