Topography for freshwater fish culture topographical surveys : simple methods for aquaculture /
Coche A. G.
- Rome : FAO United Nations, c1989.
- vii, 266 p. : ill. (some col.) ; 22cm.
Contents
Topographical surveys -Plan survey How to survey by traveling How to survey by radiating How to survey by off set
Topographical survey -Direct levelling How to level by differential How to level by profile
Topographical plan and maps How to make scales for plans and maps How to make a map by plane tabling How to map contours
Measurements for areas How to use the strip methods for measuring How to use the square grid methods for measuring
Topography and freshwater fish culture What you have learned How to make preliminary studies for topographical