Abstract
AbstractThis paper describes an adaptation of the ‘leap‐frog’ method of barometric altimetry which enables altimetric surveys to be undertaken by a single operator using a single barometer with no requirement for base stations. The method involves two readings at each station, the first bracketed by readings at the previous station, and the second bracketed by readings at the subsequent station. Linear interpolation is used to estimate what the readings would have been at each station at the time that readings were taken at the adjacent stations. Under suitable meteorological conditions errors are generally less than ±1 m, which is sufficiently accurate for a wide variety of geomorphological applications. The method has significant advantages in terms of cost and/or time over more accurate methods such as electronic distance measurement surveys or survey quality global positioning systems. The paper is accompanied by a Microsoft Excel template spreadsheet, BAROSURV.XLT, which converts temperature and pressure readings to relative elevations, and graphs the results. Notes on the use of BAROSURV.XLT are included in the ASCII text file BAROSURV.NOT.
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