03688nas a2200457 a 4500 20260817163535.0 100210s2009 th uu|m rtt 0| a1eng d .b12072953 AIT Thesis no.RS-09-02 Chaminda, S. P. Assessment of DEM accuracy generated from ALOS PRISM high resolution stereo-optical imagery using LPS Pathum Thani, Thailand : Asian Institute of Technology, 2009 96 leaves : ill. Thesis ; no. RS-09-02 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Remote Sensing and Geographical Information System Thesis (M.Eng.) - Asian Institute of Technology, 2009 The low resolution and high inconsistency in digital topographic data are a crucial problem of their practical usage in various engineering and scientific applications. New Japanese Panchromatic Remote sensing Instrument for Stereo Mapping (PRISM) sensor that is carried on the Advanced Land Observing Satellite (ALaS) could consider as one of the solution to overcome this topographical data quality problem. This research was initiated to assess the accuracy of ALaS generated DEM data and to evaluate the practical usage of Leica Photogrammetric Suit (LPS) software package using as a tool for generating ALOS based DEM. Study was carried out over a selected test site in Sri Lanka. Generated DEMs were compared for accuracy assessment using different Check Points (CPs). Check points were observed in the field in three distribution patterns, linear, curved and arbitrary and they were further categorized according to terrain distribution of the study area. Error maps were generated to present spatial correlation of the error distribution over the area. The lowest RMSE and NIMA Absolute Linear Error (LE)90 of the height for whole study area was 2-3 pixels depending primarily on surface roughness, vegetation and image texture and image quality. The RMSE and NIMA Absolute LE90 values of height for the specific areas ranged from 2 pixels (lowland) to 4 pixels in a tree»covered mountainous area. This study reveals that accuracy of the generated DEMs was significantly vary with image pair used in DEM generation, terrain type and CPs distribution pattern Remote-sensing images ALOS (Artificial satellites) Artificial satellites Chen, Xiaoyong, Chairperson Kibe, Seishiro, Examination committee Samarakoon, Lal, Examination Committee Sri Lanka Government, Scholarship donor AIT Fellowship, Scholarship donor Asian Institute of Technology. Thesis ; no. RS-09-02 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B03835 .b12072953 mnait u 240329 0 100210 m a u 0 mnait mnait mnarc 22 20 40 Barcode : 30050120590400 CREATED : 2014-05-26 RECORD # : i12803285 LPATRON : 1026132 LCHKIN : 2018-05-06 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 1 TOT CHKOUT : 3 TOT RENEW : 2 Barcode : 30050120173793 CREATED : 2014-12-22 RECORD # : i12831311 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160016837 CREATED : 2016-03-30 RECORD # : i1291468x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 9056 9056 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.RS-09-02 30050120590400 2026-08-17 16:35:35 3 2026-08-17 22 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.RS-09-02 30050120173793 2026-08-17 16:35:35 1 2026-08-17 20 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.RS-09-02 30050160016837 2026-08-17 16:35:35 2026-08-17 40