![]() However, if F-S data are not included, the relationship becomes parabolic. (2) The accuracy of DTMs derived from gridded data plus F-S data is linearly related to the grid-interval. However, if additional F-S data are included, these figures can be reduced by 40% to 60%. (1) The accuracy of DTMs derived from (photogrammetrically measured) contour data, in terms of RMSE (root mean square error) or σ (standard deviation), is about 1/3 to 1/5 of the contour interval, depending on the characteristics of the terrain topography. This paper describes a comparative study of the accuracies of digital terrain models (DTMs) derived from four different data models, namely, contour data only, contour data with additional feature-specific (F-S) data (peaks, pits, points along ridges, points along ravines, and points along break lines, etc.), square-grid data only, and square-grid data with additional F-S data.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |