Errors of slope and aspect estimated from digital elevation models derived from1:25,000-scale topographic maps
نویسندگان
چکیده
منابع مشابه
Quantifying Uncertainty of Digital Elevation Models Derived from Topographic Maps
This paper explores a methodology for quantifying the uncertainty of DEMs created by digitising topographic maps. The origins of uncertainty in DEM production were identified and examined. The uncertainty of DEM data was quantified by computing a vector total of Root Mean Square Error (RMSE) from the source map, sampling and measurement errors, and the interpolation process. Distributional meas...
متن کاملAccuracy of Local Topographic Variables Derived from Digital Elevation Models
We study the accuracy of data on some local topographic attributes derived from digital elevation models (DEMs). First, we carry out a test for the precision of four methods for calculation of partial derivatives of elevations. We ® nd that the Evans method is the most precision algorithm of this kind. Second, we produce formulae for root mean square errors of four local topographic variables (...
متن کاملExtracting Topographic Terrain Features from Elevation Maps
Some applications such as the autonomous navigation in natural terrain and the automation of map making process require highlevel scene descriptions as well as geometrical representation of the natural terrain environments. In this paper, we present methods for building high level terrain descriptions, referred to as topographic maps, by extracting terrain features like “peaks,” “pits,” “ridges...
متن کاملبرآورد خصوصیات افق سطحی خاک با استفاده از مدل رقومی پستی و بلندی زمین (مطالعه موردی: بخشی از حوزه آبخیز مهر سبزوار استان خراسان)
Conventional soil survey methods for soils within the watersheds in Iran require a significant budget with many soil surveyors and much time. Additionally, no accurate and reliable information exists on the spatial variability of superface soil parameters in order to predict the soil loss by different models (RUSLE, PISAC, EUPOSEM, MORGAN). Also information on planning and management activities...
متن کاملبرآورد خصوصیات افق سطحی خاک با استفاده از مدل رقومی پستی و بلندی زمین (مطالعه موردی: بخشی از حوزه آبخیز مهر سبزوار استان خراسان)
Conventional soil survey methods for soils within the watersheds in Iran require a significant budget with many soil surveyors and much time. Additionally, no accurate and reliable information exists on the spatial variability of superface soil parameters in order to predict the soil loss by different models (RUSLE, PISAC, EUPOSEM, MORGAN). Also information on planning and management activities...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Japanese Journal of Forest Planning
سال: 2015
ISSN: 0917-2017,2189-8308
DOI: 10.20659/jjfp.48.2_67