02736nam a2200409 4500 20260818132159.0 080998 th eng .b11494128 AIT Thesis no. CS-95-23 Songlak Piriyapairoje GIS data conversion Bangkok : Asian Institute of Technology, 1995 47 leaves + 1 online resource Thesis ; no. CS-95-23 A thesis submitted in partial fulfilment of the requirements for the degree of Master of Science Thesis (M.Sc.) - Asian Institute of Technology, 1995 A number of GIS data conversion mechanisms are available to convert raster data to vector data and vice versa. Some GIS's are able to automatically convert from one format to the others while others can operate on only a specific data format. The scanline algorithm, double run-length encoding and thinning can be handle the GIS data conversion mechanisms to improve and preserve data contents. It also provide data quality and eliminate error due to repeated conversions. In the first experiment vector data is converted to raster data. Vector data are encoded in digital line graph (DLG) which consists of the topology records of node, line and area. The scanline algorithm is used next for raster coding. The second experiment raster data is converted to vector data. To improve the quality of vector data, the double run length coding, boundary thinning and tracing by double run-length codes are proposed. Geographic information systems Yulu, Qi, Chairperson Murai, Shunji, Co-chairperson Huynh, Ngoc Phien, Examination Committee Rajamangala Institute of Technology, Scholarship donor Asian Institute of Technology. Thesis ; no. CS-95-23 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B15029 .b11494128 mnait v 240404 0 960624 m a v 0 mnait mnait mnarc 20 40 Barcode : 30050120675524 CREATED : 1996-05-21 RECORD # : i11757863 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120675532 CREATED : 1996-05-21 RECORD # : i11757875 LPATRON : 1017439 LCHKIN : 2005-09-29 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 6 TOT RENEW : 0 Barcode : 30050120356182 CREATED : 2016-06-14 RECORD # : i13036014 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 50674 50674 0 0 0 0 MAIN MAIN mnait 2026-08-18 30.00 0 AIT Thesis no. CS-95-23 30050120675524 2026-08-18 13:21:59 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 30.00 0 AIT Thesis no. CS-95-23 30050120675532 2026-08-18 13:21:59 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. CS-95-23 30050120356182 2026-08-18 13:21:59 2026-08-18 40