TY  - BOOK
AU  - Songlak Piriyapairoje
AU  - Yulu,Qi
AU  - Murai,Shunji
AU  - Huynh,Ngoc Phien
ED  - Rajamangala Institute of Technology,
TI  - GIS data conversion
T2  - Thesis
PY  - 1995///
CY  - Bangkok
PB  - Asian Institute of Technology
KW  - Geographic information systems
N1  - A thesis submitted in partial fulfilment of the requirements for the degree of Master of Science; Thesis (M.Sc.) - Asian Institute of Technology, 1995
N2  - 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
UR  - http://203.159.5.9/ait-thesis/detail.php?q=B15029
ER  -